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These are the Android API classes. See all API packages .

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A

AbortableHttpRequest	Interface representing an HTTP request that can be aborted by shutting down the underlying HTTP connection.
AbsListView	Base class that can be used to implement virtualized lists of items.
AbsListView.LayoutParams	AbsListView extends LayoutParams to provide a place to hold the view type.
AbsListView.MultiChoiceModeListener	A MultiChoiceModeListener receives events for `CHOICE_MODE_MULTIPLE_MODAL` .
AbsListView.OnScrollListener	Interface definition for a callback to be invoked when the list or grid has been scrolled.
AbsListView.RecyclerListener	A RecyclerListener is used to receive a notification whenever a View is placed inside the RecycleBin's scrap heap.
AbsListView.SelectionBoundsAdjuster	The top-level view of a list item can implement this interface to allow itself to modify the bounds of the selection shown for that item.
AbsoluteLayout	This class was deprecated in API level 3. Use `FrameLayout` , `RelativeLayout` or a custom layout instead.
AbsoluteLayout.LayoutParams	Per-child layout information associated with AbsoluteLayout.
AbsoluteSizeSpan
AbsSavedState	A `Parcelable` implementation that should be used by inheritance hierarchies to ensure the state of all classes along the chain is saved.
AbsSeekBar
AbsSpinner	An abstract base class for spinner widgets.
AbstractAccountAuthenticator	Abstract base class for creating AccountAuthenticators.
AbstractAuthenticationHandler
AbstractClientConnAdapter	Abstract adapter from `operated` to `managed` client connections.
AbstractCollection <E>	Class `AbstractCollection` is an abstract implementation of the `Collection` interface.
AbstractConnPool	An abstract connection pool.
AbstractCookieAttributeHandler
AbstractCookieSpec	Abstract cookie specification which can delegate the job of parsing, validation or matching cookie attributes to a number of arbitrary `CookieAttributeHandler` s.
AbstractCursor	This is an abstract cursor class that handles a lot of the common code that all cursors need to deal with and is provided for convenience reasons.
AbstractCursor.SelfContentObserver	Cursors use this class to track changes others make to their URI.
AbstractExecutorService	Provides default implementations of `ExecutorService` execution methods.
AbstractHttpClient	Convenience base class for HTTP client implementations.
AbstractHttpClientConnection	Abstract client-side HTTP connection capable of transmitting and receiving data using arbitrary `SessionInputBuffer` and `SessionOutputBuffer`
AbstractHttpEntity	Abstract base class for entities.
AbstractHttpMessage	Basic implementation of an HTTP message that can be modified.
AbstractHttpParams	Abstract base class for parameter collections.
AbstractHttpServerConnection	Abstract server-side HTTP connection capable of transmitting and receiving data using arbitrary `SessionInputBuffer` and `SessionOutputBuffer`
AbstractInputMethodService	AbstractInputMethodService provides a abstract base class for input methods.
AbstractInputMethodService.AbstractInputMethodImpl	Base class for derived classes to implement their `InputMethod` interface.
AbstractInputMethodService.AbstractInputMethodSessionImpl	Base class for derived classes to implement their `InputMethodSession` interface.
AbstractInterruptibleChannel	`AbstractInterruptibleChannel` is the root class for interruptible channels.
AbstractList <E>	`AbstractList` is an abstract implementation of the `List` interface, optimized for a backing store which supports random access.
AbstractMap <K, V>	A base class for `Map` implementations.
AbstractMap.SimpleEntry <K, V>	A key-value mapping with mutable values.
AbstractMap.SimpleImmutableEntry <K, V>	An immutable key-value mapping.
AbstractMessageParser	Message parser base class.
AbstractMessageWriter
AbstractMethodError	Thrown by the VM when an abstract method is called.
AbstractOwnableSynchronizer	A synchronizer that may be exclusively owned by a thread.
AbstractPooledConnAdapter	Abstract adapter from pool `entries` to `managed` client connections.
AbstractPoolEntry	A pool entry for use by connection manager implementations.
AbstractPreferences	This abstract class is a partial implementation of the abstract class Preferences, which can be used to simplify `Preferences` provider's implementation.
AbstractQueue <E>	This class provides skeletal implementations of some `Queue` operations.
AbstractQueuedLongSynchronizer	A version of `AbstractQueuedSynchronizer` in which synchronization state is maintained as a `long` .
AbstractQueuedLongSynchronizer.ConditionObject	Condition implementation for a `AbstractQueuedLongSynchronizer` serving as the basis of a `Lock` implementation.
AbstractQueuedSynchronizer	Provides a framework for implementing blocking locks and related synchronizers (semaphores, events, etc) that rely on first-in-first-out (FIFO) wait queues.
AbstractQueuedSynchronizer.ConditionObject	Condition implementation for a `AbstractQueuedSynchronizer` serving as the basis of a `Lock` implementation.
AbstractSelectableChannel	`AbstractSelectableChannel` is the base implementation class for selectable channels.
AbstractSelectionKey	`AbstractSelectionKey` is the base implementation class for selection keys.
AbstractSelector	`AbstractSelector` is the base implementation class for selectors.
AbstractSequentialList <E>	AbstractSequentialList is an abstract implementation of the List interface.
AbstractSessionInputBuffer	Abstract base class for session input buffers that stream data from a `InputStream` .
AbstractSessionOutputBuffer	Abstract base class for session output buffers that stream data to an `OutputStream` .
AbstractSet <E>	An AbstractSet is an abstract implementation of the Set interface.
AbstractThreadedSyncAdapter	An abstract implementation of a SyncAdapter that spawns a thread to invoke a sync operation.
AbstractVerifier	Abstract base class for all standard `X509HostnameVerifier` implementations.
AbstractWindowedCursor	A base class for Cursors that store their data in `CursorWindow` s.
AccelerateDecelerateInterpolator	An interpolator where the rate of change starts and ends slowly but accelerates through the middle.
AccelerateInterpolator	An interpolator where the rate of change starts out slowly and and then accelerates.
AccessControlContext	Legacy security code; do not use.
AccessControlException	`AccessControlException` is thrown if the access control infrastructure denies protected access due to missing permissions.
AccessController	Legacy security code; do not use.
AccessibilityDelegateCompat	Helper for accessing `View.AccessibilityDelegate` introduced after API level 4 in a backwards compatible fashion.
AccessibilityEvent	This class represents accessibility events that are sent by the system when something notable happens in the user interface.
AccessibilityEventCompat	Helper for accessing features in `AccessibilityEvent` introduced after API level 4 in a backwards compatible fashion.
AccessibilityEventSource	This interface is implemented by classes source of `AccessibilityEvent` s.
AccessibilityManager	System level service that serves as an event dispatch for `AccessibilityEvent` s, and provides facilities for querying the accessibility state of the system.
AccessibilityManager.AccessibilityStateChangeListener	Listener for the system accessibility state.
AccessibilityManager.TouchExplorationStateChangeListener	Listener for the system touch exploration state.
AccessibilityManagerCompat	Helper for accessing features in `AccessibilityManager` introduced after API level 4 in a backwards compatible fashion.
AccessibilityManagerCompat.AccessibilityStateChangeListenerCompat	Listener for the accessibility state.
AccessibilityNodeInfo	This class represents a node of the window content as well as actions that can be requested from its source.
AccessibilityNodeInfo.CollectionInfo	Class with information if a node is a collection.
AccessibilityNodeInfo.CollectionItemInfo	Class with information if a node is a collection item.
AccessibilityNodeInfo.RangeInfo	Class with information if a node is a range.
AccessibilityNodeInfoCompat	Helper for accessing `AccessibilityNodeInfo` introduced after API level 4 in a backwards compatible fashion.
AccessibilityNodeProvider	This class is the contract a client should implement to enable support of a virtual view hierarchy rooted at a given view for accessibility purposes.
AccessibilityNodeProviderCompat	Helper for accessing `AccessibilityNodeProvider` introduced after API level 4 in a backwards compatible fashion.
AccessibilityRecord	Represents a record in an `AccessibilityEvent` and contains information about state change of its source `View` .
AccessibilityRecordCompat	Helper for accessing `AccessibilityRecord` introduced after API level 4 in a backwards compatible fashion.
AccessibilityService	An accessibility service runs in the background and receives callbacks by the system when `AccessibilityEvent` s are fired.
AccessibilityServiceInfo	This class describes an `AccessibilityService` .
AccessibilityServiceInfoCompat	Helper for accessing features in `AccessibilityService` introduced after API level 4 in a backwards compatible fashion.
AccessibleObject	`AccessibleObject` is the superclass of all member reflection classes (Field, Constructor, Method).
Account	Value type that represents an Account in the `AccountManager` .
AccountAuthenticatorActivity	Base class for implementing an Activity that is used to help implement an AbstractAccountAuthenticator.
AccountAuthenticatorResponse	Object used to communicate responses back to the AccountManager
AccountManager	This class provides access to a centralized registry of the user's online accounts.
AccountManagerCallback <V>
AccountManagerFuture <V>	A `AccountManagerFuture` represents the result of an asynchronous `AccountManager` call.
AccountsException
Acl	The Access Control List ( ACL ) interface definition.
AclEntry	The Access Control List Entry interface definition.
AclNotFoundException	The exception, that is thrown when a reference to a non-existent Access Control List (ACL) is made.
AcousticEchoCanceler	Acoustic Echo Canceler (AEC).
ActionBar	A window feature at the top of the activity that may display the activity title, navigation modes, and other interactive items.
ActionBar	A window feature at the top of the activity that may display the activity title, navigation modes, and other interactive items.
ActionBar.LayoutParams	Per-child layout information associated with action bar custom views.
ActionBar.LayoutParams	Per-child layout information associated with action bar custom views.
ActionBar.OnMenuVisibilityListener	Listener for receiving events when action bar menus are shown or hidden.
ActionBar.OnMenuVisibilityListener	Listener for receiving events when `ActionBar` items are shown or hidden.
ActionBar.OnNavigationListener	Listener interface for ActionBar navigation events.
ActionBar.OnNavigationListener	Listener for receiving `ActionBar` navigation events.
ActionBar.Tab	A tab in the action bar.
ActionBar.Tab	A tab in the action bar that manages the hiding and showing of `Fragment` s.
ActionBar.TabListener	Callback interface invoked when a tab is focused, unfocused, added, or removed.
ActionBar.TabListener	Callback interface invoked when an `ActionBar.Tab` is focused, unfocused, added, or removed.
ActionBarActivity	Base class for activities that use the support library action bar features.
ActionBarDrawerToggle	This class provides a handy way to tie together the functionality of `DrawerLayout` and the framework `ActionBar` to implement the recommended design for navigation drawers.
ActionBarDrawerToggle.Delegate
ActionBarDrawerToggle.DelegateProvider	Allows an implementing Activity to return an `ActionBarDrawerToggle.Delegate` to use with ActionBarDrawerToggle.
ActionBarImplJB
ActionBarImplJBMR2
ActionMode	Represents a contextual mode of the user interface.
ActionMode	Represents a contextual mode of the user interface.
ActionMode.Callback	Callback interface for action modes.
ActionMode.Callback	Callback interface for action modes.
ActionProvider	This class is a mediator for accomplishing a given task, for example sharing a file.
ActionProvider	An ActionProvider defines rich menu interaction in a single component.
ActionProvider.VisibilityListener	Listens to changes in visibility as reported by `refreshVisibility()` .
ActionProvider.VisibilityListener	Listens to changes in visibility as reported by `refreshVisibility()` .
Activity	An activity is a single, focused thing that the user can do.
ActivityCompat	Helper for accessing features in `Activity` introduced after API level 4 in a backwards compatible fashion.
ActivityGroup	This class was deprecated in API level 13. Use the new `Fragment` and `FragmentManager` APIs instead; these are also available on older platforms through the Android compatibility package.
ActivityInfo	Information you can retrieve about a particular application activity or receiver.
ActivityInfoCompat	Helper for accessing features in `ActivityInfo` introduced after API level 4 in a backwards compatible fashion.
ActivityInstrumentationTestCase <T extends Activity >	This class was deprecated in API level 3. new tests should be written using `ActivityInstrumentationTestCase2` , which provides more options for configuring the Activity under test
ActivityInstrumentationTestCase2 <T extends Activity >	This class provides functional testing of a single activity.
ActivityManager	Interact with the overall activities running in the system.
ActivityManager.MemoryInfo	Information you can retrieve about the available memory through `getMemoryInfo(ActivityManager.MemoryInfo)` .
ActivityManager.ProcessErrorStateInfo	Information you can retrieve about any processes that are in an error condition.
ActivityManager.RecentTaskInfo	Information you can retrieve about tasks that the user has most recently started or visited.
ActivityManager.RunningAppProcessInfo	Information you can retrieve about a running process.
ActivityManager.RunningServiceInfo	Information you can retrieve about a particular Service that is currently running in the system.
ActivityManager.RunningTaskInfo	Information you can retrieve about a particular task that is currently "running" in the system.
ActivityNotFoundException	This exception is thrown when a call to `startActivity(Intent)` or one of its variants fails because an Activity can not be found to execute the given Intent.
ActivityOptions	Helper class for building an options Bundle that can be used with `Context.startActivity(Intent, Bundle)` and related methods.
ActivityOptionsCompat	Helper for accessing features in `ActivityOptions` introduced in API level 16 in a backwards compatible fashion.
ActivityTestCase	This is common code used to support Activity test cases.
ActivityUnitTestCase <T extends Activity >	This class provides isolated testing of a single activity.
Adapter	An Adapter object acts as a bridge between an `AdapterView` and the underlying data for that view.
AdapterView <T extends Adapter >	An AdapterView is a view whose children are determined by an `Adapter` .
AdapterView.AdapterContextMenuInfo	Extra menu information provided to the `onCreateContextMenu(ContextMenu, View, ContextMenuInfo)` callback when a context menu is brought up for this AdapterView.
AdapterView.OnItemClickListener	Interface definition for a callback to be invoked when an item in this AdapterView has been clicked.
AdapterView.OnItemLongClickListener	Interface definition for a callback to be invoked when an item in this view has been clicked and held.
AdapterView.OnItemSelectedListener	Interface definition for a callback to be invoked when an item in this view has been selected.
AdapterViewAnimator	Base class for a `AdapterView` that will perform animations when switching between its views.
AdapterViewFlipper	Simple `ViewAnimator` that will animate between two or more views that have been added to it.
Address	A class representing an Address, i.e, a set of Strings describing a location.
Adler32	The Adler-32 class is used to compute the `Adler32` checksum from a set of data.
Advanceable	This interface can be implemented by any collection-type view which has a notion of progressing through its set of children.
AEADBadTagException	Thrown by a `Cipher` that is using an Authenticated Encryption with Additional Data (AEAD) mode such as Galois/Counter Mode (GCM) and the tag failed verification.
AlarmClock	The AlarmClock provider contains an Intent action and extras that can be used to start an Activity to set a new alarm or timer in an alarm clock application.
AlarmManager	This class provides access to the system alarm services.
AlertDialog	A subclass of Dialog that can display one, two or three buttons.
AlertDialog.Builder
AlgorithmParameterGenerator	`AlgorithmParameterGenerator` is an engine class which is capable of generating parameters for the algorithm it was initialized with.
AlgorithmParameterGeneratorSpi	`AlgorithmParameterGeneratorSpi` is the Service Provider Interface (SPI) definition for `AlgorithmParameterGenerator` .
AlgorithmParameters	`AlgorithmParameters` is an engine class which provides algorithm parameters.
AlgorithmParameterSpec	The marker interface for algorithm parameter specifications.
AlgorithmParametersSpi	`AlgorithmParametersSpi` is the Service Provider Interface (SPI) definition for `AlgorithmParameters` .
AliasActivity	Stub activity that launches another activity (and then finishes itself) based on information in its component's manifest meta-data.
AlignmentSpan
AlignmentSpan.Standard
AllClientPNames	Collected parameter names for the HttpClient module.
Allocation	This class provides the primary method through which data is passed to and from RenderScript kernels.
Allocation	This class provides the primary method through which data is passed to and from RenderScript kernels.
Allocation.MipmapControl	Controls mipmap behavior when using the bitmap creation and update functions.
Allocation.MipmapControl	Controls mipmap behavior when using the bitmap creation and update functions.
Allocation.OnBufferAvailableListener	Interface to handle notification when new buffers are available via `USAGE_IO_INPUT` .
AllocationAdapter	Only intended for use by generated reflected code.
AllowAllHostnameVerifier	The ALLOW_ALL HostnameVerifier essentially turns hostname verification off.
AllPermission	Legacy security code; do not use.
AlphaAnimation	An animation that controls the alpha level of an object.
AlphabetIndexer	A helper class for adapters that implement the SectionIndexer interface.
AlreadyConnectedException	An `AlreadyConnectedException` is thrown when an attempt is made to connect a SocketChannel that is already connected.
AlteredCharSequence	An AlteredCharSequence is a CharSequence that is largely mirrored from another CharSequence, except that a specified range of characters are mirrored from a different char array instead.
AnalogClock	This widget display an analogic clock with two hands for hours and minutes.
AndroidCharacter	AndroidCharacter exposes some character properties that are not easily accessed from java.lang.Character.
AndroidException	Base class for all checked exceptions thrown by the Android frameworks.
AndroidHttpClient	Implementation of the Apache `DefaultHttpClient` that is configured with reasonable default settings and registered schemes for Android.
AndroidRuntimeException	Base class for all unchecked exceptions thrown by the Android frameworks.
AndroidTestCase	Extend this if you need to access Resources or other things that depend on Activity Context.
AndroidTestRunner
Animatable	Interface that drawables suporting animations should implement.
Animation	Abstraction for an Animation that can be applied to Views, Surfaces, or other objects.
Animation.AnimationListener	An animation listener receives notifications from an animation.
Animation.Description	Utility class to parse a string description of a size.
AnimationDrawable	An object used to create frame-by-frame animations, defined by a series of Drawable objects, which can be used as a View object's background.
AnimationSet	Represents a group of Animations that should be played together.
AnimationUtils	Defines common utilities for working with animations.
Animator	This is the superclass for classes which provide basic support for animations which can be started, ended, and have `AnimatorListeners` added to them.
Animator.AnimatorListener	An animation listener receives notifications from an animation.
Animator.AnimatorPauseListener	A pause listener receives notifications from an animation when the animation is `paused` or `resumed` .
AnimatorInflater	This class is used to instantiate animator XML files into Animator objects.
AnimatorListenerAdapter	This adapter class provides empty implementations of the methods from `Animator.AnimatorListener` .
AnimatorRes	Denotes that an integer parameter, field or method return value is expected to be an animator resource reference (e.g.
AnimatorSet	This class plays a set of `Animator` objects in the specified order.
AnimatorSet.Builder	The `Builder` object is a utility class to facilitate adding animations to a `AnimatorSet` along with the relationships between the various animations.
AnimRes	Denotes that an integer parameter, field or method return value is expected to be an anim resource reference (e.g.
AnnotatedElement	This interface provides reflective access to annotation information.
Annotation	Annotations are simple key-value pairs that are preserved across TextView save/restore cycles and can be used to keep application-specific data that needs to be maintained for regions of text.
Annotation	Defines the interface implemented by all annotations.
Annotation	Wrapper for a text attribute value which represents an annotation.
AnnotationFormatError	Indicates that an annotation in the binary representation of a class is syntactically incorrect and the annotation parser is unable to process it.
AnnotationTypeMismatchException	Indicates that an annotation type has changed since it was compiled or serialized.
AnticipateInterpolator	An interpolator where the change starts backward then flings forward.
AnticipateOvershootInterpolator	An interpolator where the change starts backward then flings forward and overshoots the target value and finally goes back to the final value.
AnyRes	Denotes that an integer parameter, field or method return value is expected to be a resource reference of any type.
Appendable	Declares methods to append characters or character sequences.
Application	Base class for those who need to maintain global application state.
Application.ActivityLifecycleCallbacks
Application.OnProvideAssistDataListener	Callback interface for use with `registerOnProvideAssistDataListener(Application.OnProvideAssistDataListener)` and `unregisterOnProvideAssistDataListener(Application.OnProvideAssistDataListener)` .
ApplicationErrorReport	Describes an application error.
ApplicationErrorReport.AnrInfo	Describes an application not responding error.
ApplicationErrorReport.BatteryInfo	Describes a battery usage report.
ApplicationErrorReport.CrashInfo	Describes an application crash.
ApplicationErrorReport.RunningServiceInfo	Describes a running service report.
ApplicationInfo	Information you can retrieve about a particular application.
ApplicationInfo.DisplayNameComparator
ApplicationTestCase <T extends Application >	This test case provides a framework in which you can test Application classes in a controlled environment.
AppOpsManager	API for interacting with "application operation" tracking.
AppOpsManager.OnOpChangedListener	Callback for notification of changes to operation state.
AppWidgetHost	AppWidgetHost provides the interaction with the AppWidget service for apps, like the home screen, that want to embed AppWidgets in their UI.
AppWidgetHostView	Provides the glue to show AppWidget views.
AppWidgetManager	Updates AppWidget state; gets information about installed AppWidget providers and other AppWidget related state.
AppWidgetProvider	A convenience class to aid in implementing an AppWidget provider.
AppWidgetProviderInfo	Describes the meta data for an installed AppWidget provider.
ArcShape	Creates an arc shape.
ArgbEvaluator	This evaluator can be used to perform type interpolation between integer values that represent ARGB colors.
ArithmeticException	Thrown when the an invalid arithmetic operation is attempted.
Array	Provides static methods to create and access arrays dynamically.
Array	A Java representation of the SQL `ARRAY` type.
ArrayAdapter <T>	A concrete BaseAdapter that is backed by an array of arbitrary objects.
ArrayBlockingQueue <E>	A bounded `blocking queue` backed by an array.
ArrayDeque <E>	Resizable-array implementation of the `Deque` interface.
ArrayIndexOutOfBoundsException	Thrown when the an array is indexed with a value less than zero, or greater than or equal to the size of the array.
ArrayList <E>	ArrayList is an implementation of `List` , backed by an array.
ArrayMap <K, V>	ArrayMap is a generic key->value mapping data structure that is designed to be more memory efficient than a traditional `HashMap` , this implementation is a version of the platform's `ArrayMap` that can be used on older versions of the platform.
ArrayMap <K, V>	ArrayMap is a generic key->value mapping data structure that is designed to be more memory efficient than a traditional `HashMap` .
ArrayRes	Denotes that an integer parameter, field or method return value is expected to be an array resource reference (e.g.
Arrays	`Arrays` contains static methods which operate on arrays.
ArrayStoreException	Thrown when a program attempts to store an element of an incompatible type in an array.
ArrowKeyMovementMethod	A movement method that provides cursor movement and selection.
Assert	A set of assert methods.
AssertionError	Thrown when an assertion has failed.
AssertionFailedError	This class was deprecated in API level 16. use junit.framework.AssertionFailedError
AssertionFailedError	Thrown when an assertion failed.
AssetFileDescriptor	File descriptor of an entry in the AssetManager.
AssetFileDescriptor.AutoCloseInputStream	An InputStream you can create on a ParcelFileDescriptor, which will take care of calling `ParcelFileDescritor.close()` for you when the stream is closed.
AssetFileDescriptor.AutoCloseOutputStream	An OutputStream you can create on a ParcelFileDescriptor, which will take care of calling `ParcelFileDescritor.close()` for you when the stream is closed.
AssetManager	Provides access to an application's raw asset files; see `Resources` for the way most applications will want to retrieve their resource data.
AssetManager.AssetInputStream
AsynchronousCloseException	An `AsynchronousCloseException` is thrown when the underlying channel for an I/O operation is closed by another thread.
AsyncPlayer	Plays a series of audio URIs, but does all the hard work on another thread so that any slowness with preparing or loading doesn't block the calling thread.
AsyncQueryHandler	A helper class to help make handling asynchronous `ContentResolver` queries easier.
AsyncQueryHandler.WorkerArgs
AsyncQueryHandler.WorkerHandler
AsyncTask <Params, Progress, Result>	AsyncTask enables proper and easy use of the UI thread.
AsyncTask.Status	Indicates the current status of the task.
AsyncTaskLoader <D>	Abstract Loader that provides an `AsyncTask` to do the work.
AsyncTaskLoader <D>	Static library support version of the framework's `AsyncTaskLoader` .
AtomicBoolean	A `boolean` value that may be updated atomically.
AtomicFile	Static library support version of the framework's `AtomicFile` , a helper class for performing atomic operations on a file by creating a backup file until a write has successfully completed.
AtomicFile	Helper class for performing atomic operations on a file by creating a backup file until a write has successfully completed.
AtomicInteger	An `int` value that may be updated atomically.
AtomicIntegerArray	An `int` array in which elements may be updated atomically.
AtomicIntegerFieldUpdater <T>	A reflection-based utility that enables atomic updates to designated `volatile int` fields of designated classes.
AtomicLong	A `long` value that may be updated atomically.
AtomicLongArray	A `long` array in which elements may be updated atomically.
AtomicLongFieldUpdater <T>	A reflection-based utility that enables atomic updates to designated `volatile long` fields of designated classes.
AtomicMarkableReference <V>	An `AtomicMarkableReference` maintains an object reference along with a mark bit, that can be updated atomically.
AtomicReference <V>	An object reference that may be updated atomically.
AtomicReferenceArray <E>	An array of object references in which elements may be updated atomically.
AtomicReferenceFieldUpdater <T, V>	A reflection-based utility that enables atomic updates to designated `volatile` reference fields of designated classes.
AtomicStampedReference <V>	An `AtomicStampedReference` maintains an object reference along with an integer "stamp", that can be updated atomically.
Attr	The `Attr` interface represents an attribute in an `Element` object.
AttributedCharacterIterator	Extends the `CharacterIterator` interface, adding support for iterating over attributes and not only characters.
AttributedCharacterIterator.Attribute	Defines keys for text attributes.
AttributedString	Holds a string with attributes describing the characters of this string.
AttributeList	This interface was deprecated in API level 1. This interface has been replaced by the SAX2 `Attributes` interface, which includes Namespace support.
AttributeListImpl	This class was deprecated in API level 1. This class implements a deprecated interface, `AttributeList` ; that interface has been replaced by `Attributes` , which is implemented in the `AttributesImpl` helper class.
Attributes	The `Attributes` class is used to store values for manifest entries.
Attributes	Interface for a list of XML attributes.
Attributes.Name	The name part of the name/value pairs constituting an attribute as defined by the specification of the JAR manifest.
Attributes2	SAX2 extension to augment the per-attribute information provided though `Attributes` .
Attributes2Impl	SAX2 extension helper for additional Attributes information, implementing the `Attributes2` interface.
AttributeSet	A collection of attributes, as found associated with a tag in an XML document.
AttributesImpl	Default implementation of the Attributes interface.
AttrRes	Denotes that an integer parameter, field or method return value is expected to be an attribute reference (e.g.
AudioCodec	This class defines a collection of audio codecs to be used with `AudioStream` s.
AudioEffect	AudioEffect is the base class for controlling audio effects provided by the android audio framework.
AudioEffect.Descriptor	The effect descriptor contains information on a particular effect implemented in the audio framework: type: UUID identifying the effect type.
AudioEffect.OnControlStatusChangeListener	The OnControlStatusChangeListener interface defines a method called by the AudioEffect when a the control of the effect engine is gained or lost by the application
AudioEffect.OnEnableStatusChangeListener	The OnEnableStatusChangeListener interface defines a method called by the AudioEffect when a the enabled state of the effect engine was changed by the controlling application.
AudioFormat	The AudioFormat class is used to access a number of audio format and channel configuration constants.
AudioGroup	An AudioGroup is an audio hub for the speaker, the microphone, and `AudioStream` s.
AudioManager	AudioManager provides access to volume and ringer mode control.
AudioManager.OnAudioFocusChangeListener	Interface definition for a callback to be invoked when the audio focus of the system is updated.
AudioRecord	The AudioRecord class manages the audio resources for Java applications to record audio from the audio input hardware of the platform.
AudioRecord.OnRecordPositionUpdateListener	Interface definition for a callback to be invoked when an AudioRecord has reached a notification marker set by `setNotificationMarkerPosition(int)` or for periodic updates on the progress of the record head, as set by `setPositionNotificationPeriod(int)` .
AudioStream	An AudioStream is a `RtpStream` which carrys audio payloads over Real-time Transport Protocol (RTP).
AudioTimestamp	Structure that groups a position in frame units relative to an assumed audio stream, together with the estimated time when that frame was presented or is committed to be presented.
AudioTrack	The AudioTrack class manages and plays a single audio resource for Java applications.
AudioTrack.OnPlaybackPositionUpdateListener	Interface definition for a callback to be invoked when the playback head position of an AudioTrack has reached a notification marker or has increased by a certain period.
AUTH	Constants and static helpers related to the HTTP authentication.
AuthenticationException	Signals a failure in authentication process
AuthenticationHandler
Authenticator	An implementation of this class is able to obtain authentication information for a connection in several ways.
Authenticator.RequestorType	Enumeration class for the origin of the authentication request.
AuthenticatorDescription	A `Parcelable` value type that contains information about an account authenticator.
AuthenticatorException
AuthParamBean
AuthParams	This class implements an adaptor around the `HttpParams` interface to simplify manipulation of the HTTP authentication specific parameters.
AuthPermission	Legacy security code; do not use.
AuthPNames	Parameter names for HttpAuth.
AuthPolicy
AuthProvider	Legacy security code; do not use.
AuthScheme	This interface represents an abstract challenge-response oriented authentication scheme.
AuthSchemeBase	Abstract authentication scheme class that serves as a basis for all authentication schemes supported by HttpClient.
AuthSchemeFactory
AuthSchemeRegistry	Authentication scheme registry that can be used to obtain the corresponding authentication scheme implementation for a given type of authorization challenge.
AuthScope	The class represents an authentication scope consisting of a host name, a port number, a realm name and an authentication scheme name which `Credentials` apply to.
AuthState	This class provides detailed information about the state of the authentication process.
AutoCloseable	Defines an interface for classes that can (or need to) be closed once they are not used any longer.
AutoCompleteTextView	An editable text view that shows completion suggestions automatically while the user is typing.
AutoCompleteTextView.OnDismissListener	Listener to respond to the AutoCompleteTextView's completion list being dismissed.
AutoCompleteTextView.Validator	This interface is used to make sure that the text entered in this TextView complies to a certain format.
AutomaticGainControl	Automatic Gain Control (AGC).
AutoScrollHelper	AutoScrollHelper is a utility class for adding automatic edge-triggered scrolling to Views.
AutoText	This class accesses a dictionary of corrections to frequent misspellings.
AutoTransition	Utility class for creating a default transition that automatically fades, moves, and resizes views during a scene change.
AvoidXfermode	AvoidXfermode xfermode will draw the src everywhere except on top of the opColor or, depending on the Mode, draw only on top of the opColor.
AvoidXfermode.Mode

B

BackgroundColorSpan
BackingStoreException	An exception to indicate that an error was encountered while accessing the backing store.
BackupAgent	Provides the central interface between an application and Android's data backup infrastructure.
BackupAgentHelper	A convenient `BackupAgent` wrapper class that automatically manages heterogeneous data sets within the backup data, each identified by a unique key prefix.
BackupDataInput	Provides the structured interface through which a `BackupAgent` reads information from the backup data set, via its `onRestore()` method.
BackupDataInputStream	Provides an `InputStream` -like interface for accessing an entity's data during a restore operation.
BackupDataOutput	Provides the structured interface through which a `BackupAgent` commits information to the backup data set, via its `onBackup()` method.
BackupHelper	Defines the calling interface that `BackupAgentHelper` uses when dispatching backup and restore operations to the installed helpers.
BackupManager	The interface through which an application interacts with the Android backup service to request backup and restore operations.
BadPaddingException	The exception that is thrown when a padding mechanism is expected for the input data, but the input data does not have the proper padding bytes.
BadParcelableException	The object you are calling has died, because its hosting process no longer exists.
Base64	Utilities for encoding and decoding the Base64 representation of binary data.
Base64DataException	This exception is thrown by `Base64InputStream` or `Base64OutputStream` when an error is detected in the data being decoded.
Base64InputStream	An InputStream that does Base64 decoding on the data read through it.
Base64OutputStream	An OutputStream that does Base64 encoding on the data written to it, writing the resulting data to another OutputStream.
BaseAdapter	Common base class of common implementation for an `Adapter` that can be used in both `ListView` (by implementing the specialized `ListAdapter` interface) and `Spinner` (by implementing the specialized `SpinnerAdapter` interface).
BaseColumns
BaseDexClassLoader	Base class for common functionality between various dex-based `ClassLoader` implementations.
BaseExpandableListAdapter	Base class for a `ExpandableListAdapter` used to provide data and Views from some data to an expandable list view.
BaseInputConnection	Base class for implementors of the InputConnection interface, taking care of most of the common behavior for providing a connection to an Editable.
BaseKeyListener	Abstract base class for key listeners.
BaseMovementMethod	Base classes for movement methods.
BaseObj	BaseObj is the base class for all RenderScript objects owned by a RS context.
BaseObj	BaseObj is the base class for all RenderScript objects owned by a RS context.
BaseTestRunner	Base class for all test runners.
BasicClientCookie	HTTP "magic-cookie" represents a piece of state information that the HTTP agent and the target server can exchange to maintain a session.
BasicClientCookie2	HTTP "magic-cookie" represents a piece of state information that the HTTP agent and the target server can exchange to maintain a session as specified by RFC2965.
BasicCommentHandler
BasicCookieStore	Default implementation of `CookieStore`
BasicCredentialsProvider	Default implementation of `CredentialsProvider`
BasicDomainHandler
BasicEofSensorWatcher	Basic implementation of `EofSensorWatcher` .
BasicExpiresHandler
BasicHeader	Represents an HTTP header field.
BasicHeaderElement	One element of an HTTP header's value.
BasicHeaderElementIterator	Basic implementation of a `HeaderElementIterator` .
BasicHeaderIterator	Basic implementation of a `HeaderIterator` .
BasicHeaderValueFormatter	Basic implementation for formatting header value elements.
BasicHeaderValueParser	Basic implementation for parsing header values into elements.
BasicHttpContext	Default implementation of the `HttpContext` .
BasicHttpEntity	A generic streamed entity being received on a connection.
BasicHttpEntityEnclosingRequest	Basic implementation of a request with an entity that can be modified.
BasicHttpParams	This class represents a collection of HTTP protocol parameters.
BasicHttpProcessor	Keeps lists of interceptors for processing requests and responses.
BasicHttpRequest	Basic implementation of an HTTP request that can be modified.
BasicHttpResponse	Basic implementation of an HTTP response that can be modified.
BasicLineFormatter	Interface for formatting elements of the HEAD section of an HTTP message.
BasicLineParser	Basic parser for lines in the head section of an HTTP message.
BasicListHeaderIterator	Implementation of a `HeaderIterator` based on a `List` .
BasicManagedEntity	An entity that releases a `connection` .
BasicMaxAgeHandler
BasicNameValuePair	A simple class encapsulating an attribute/value pair.
BasicPathHandler
BasicPermission	Legacy security code; do not use.
BasicPooledConnAdapter	A connection wrapper and callback handler.
BasicPoolEntry	Basic implementation of a connection pool entry.
BasicPoolEntryRef	A weak reference to a `BasicPoolEntry` .
BasicRequestLine	The first line of an `HttpRequest` .
BasicResponseHandler	A `ResponseHandler` that returns the response body as a String for successful (2xx) responses.
BasicRouteDirector	Basic implementation of an `HttpRouteDirector` .
BasicScheme	Basic authentication scheme as defined in RFC 2617.
BasicSchemeFactory
BasicSecureHandler
BasicStatusLine	Represents a status line as returned from a HTTP server.
BasicTokenIterator	Basic implementation of a `TokenIterator` .
BasicUserPrincipal	Basic user principal used for HTTP authentication
BassBoost	Bass boost is an audio effect to boost or amplify low frequencies of the sound.
BassBoost.OnParameterChangeListener	The OnParameterChangeListener interface defines a method called by the BassBoost when a parameter value has changed.
BassBoost.Settings	The Settings class regroups all bass boost parameters.
BatchUpdateException	This exception is thrown if a problem occurs during a batch update operation.
BatteryManager	The BatteryManager class contains strings and constants used for values in the `ACTION_BATTERY_CHANGED` Intent.
BestMatchSpec	'Meta' cookie specification that selects a cookie policy depending on the format of the cookie(s)
BestMatchSpecFactory
Bidi	Implements the Unicode Bidirectional Algorithm .
BidiFormatter	Utility class for formatting text for display in a potentially opposite-directionality context without garbling.
BidiFormatter	Utility class for formatting text for display in a potentially opposite-directionality context without garbling.
BidiFormatter.Builder	A class for building a BidiFormatter with non-default options.
BidiFormatter.Builder	A class for building a BidiFormatter with non-default options.
BigDecimal	An immutable arbitrary-precision signed decimal.
BigInteger	An immutable arbitrary-precision signed integer.
Binder	Base class for a remotable object, the core part of a lightweight remote procedure call mechanism defined by `IBinder` .
BindException	A `BindException` is thrown when a process cannot bind a local address/port, either because it is already bound or reserved by the OS.
Bitmap
Bitmap.CompressFormat	Specifies the known formats a bitmap can be compressed into
Bitmap.Config	Possible bitmap configurations.
BitmapDrawable	A Drawable that wraps a bitmap and can be tiled, stretched, or aligned.
BitmapFactory	Creates Bitmap objects from various sources, including files, streams, and byte-arrays.
BitmapFactory.Options
BitmapRegionDecoder	BitmapRegionDecoder can be used to decode a rectangle region from an image.
BitmapShader	Shader used to draw a bitmap as a texture.
BitSet	The `BitSet` class implements a bit array .
Blob	A Java interface representing the SQL `BLOB` type.
BlockingDeque <E>	A `Deque` that additionally supports blocking operations that wait for the deque to become non-empty when retrieving an element, and wait for space to become available in the deque when storing an element.
BlockingQueue <E>	A `Queue` that additionally supports operations that wait for the queue to become non-empty when retrieving an element, and wait for space to become available in the queue when storing an element.
BluetoothA2dp	This class provides the public APIs to control the Bluetooth A2DP profile.
BluetoothAdapter	Represents the local device Bluetooth adapter.
BluetoothAdapter.LeScanCallback	Callback interface used to deliver LE scan results.
BluetoothAssignedNumbers	Bluetooth Assigned Numbers.
BluetoothClass	Represents a Bluetooth class, which describes general characteristics and capabilities of a device.
BluetoothClass.Device	Defines all device class constants.
BluetoothClass.Device.Major	Defines all major device class constants.
BluetoothClass.Service	Defines all service class constants.
BluetoothDevice	Represents a remote Bluetooth device.
BluetoothGatt	Public API for the Bluetooth GATT Profile.
BluetoothGattCallback	This abstract class is used to implement `BluetoothGatt` callbacks.
BluetoothGattCharacteristic	Represents a Bluetooth GATT Characteristic A GATT characteristic is a basic data element used to construct a GATT service, `BluetoothGattService` .
BluetoothGattDescriptor	Represents a Bluetooth GATT Descriptor GATT Descriptors contain additional information and attributes of a GATT characteristic, `BluetoothGattCharacteristic` .
BluetoothGattServer	Public API for the Bluetooth GATT Profile server role.
BluetoothGattServerCallback	This abstract class is used to implement `BluetoothGattServer` callbacks.
BluetoothGattService	Represents a Bluetooth GATT Service Gatt Service contains a collection of `BluetoothGattCharacteristic` , as well as referenced services.
BluetoothHeadset	Public API for controlling the Bluetooth Headset Service.
BluetoothHealth	Public API for Bluetooth Health Profile.
BluetoothHealthAppConfiguration	The Bluetooth Health Application Configuration that is used in conjunction with the `BluetoothHealth` class.
BluetoothHealthCallback	This abstract class is used to implement `BluetoothHealth` callbacks.
BluetoothManager	High level manager used to obtain an instance of an `BluetoothAdapter` and to conduct overall Bluetooth Management.
BluetoothProfile	Public APIs for the Bluetooth Profiles.
BluetoothProfile.ServiceListener	An interface for notifying BluetoothProfile IPC clients when they have been connected or disconnected to the service.
BluetoothServerSocket	A listening Bluetooth socket.
BluetoothSocket	A connected or connecting Bluetooth socket.
BlurMaskFilter	This takes a mask, and blurs its edge by the specified radius.
BlurMaskFilter.Blur
Boolean	The wrapper for the primitive type `boolean` .
BoolRes	Denotes that an integer parameter, field or method return value is expected to be a boolean resource reference.
BoringLayout	A BoringLayout is a very simple Layout implementation for text that fits on a single line and is all left-to-right characters.
BoringLayout.Metrics
BounceInterpolator	An interpolator where the change bounces at the end.
BreakIterator	Locates boundaries in text.
BroadcastReceiver	Base class for code that will receive intents sent by sendBroadcast().
BroadcastReceiver.PendingResult	State for a result that is pending for a broadcast receiver.
BrokenBarrierException	Exception thrown when a thread tries to wait upon a barrier that is in a broken state, or which enters the broken state while the thread is waiting.
Browser
Browser.BookmarkColumns	Column definitions for the mixed bookmark and history items available at `BOOKMARKS_URI` .
Browser.SearchColumns	Column definitions for the search history table, available at `SEARCHES_URI` .
BrowserCompatHostnameVerifier	The HostnameVerifier that works the same way as Curl and Firefox.
BrowserCompatSpec	Cookie specification that strives to closely mimic (mis)behavior of common web browser applications such as Microsoft Internet Explorer and Mozilla FireFox.
BrowserCompatSpecFactory
Buffer	A buffer is a list of elements of a specific primitive type.
BufferedHeader	This class represents a raw HTTP header whose content is parsed 'on demand' only when the header value needs to be consumed.
BufferedHttpEntity	A wrapping entity that buffers it content if necessary.
BufferedInputStream	Wraps an existing `InputStream` and buffers the input.
BufferedOutputStream	Wraps an existing `OutputStream` and buffers the output.
BufferedReader	Wraps an existing `Reader` and buffers the input.
BufferedWriter	Wraps an existing `Writer` and buffers the output.
BufferOverflowException	A `BufferOverflowException` is thrown when elements are written to a buffer but there is not enough remaining space in the buffer.
BufferUnderflowException	A `BufferUnderflowException` is thrown when elements are read from a buffer but there are not enough remaining elements in the buffer.
Build	Information about the current build, extracted from system properties.
Build.VERSION	Various version strings.
Build.VERSION_CODES	Enumeration of the currently known SDK version codes.
BulletSpan
Bundle	A mapping from String values to various Parcelable types.
Button	Represents a push-button widget.
Byte	The wrapper for the primitive type `byte` .
Byte2	Class for exposing the native RenderScript byte2 type back to the Android system.
Byte2	Class for exposing the native RenderScript byte2 type back to the Android system.
Byte3	Class for exposing the native RenderScript byte3 type back to the Android system.
Byte3	Class for exposing the native RenderScript byte3 type back to the Android system.
Byte4	Class for exposing the native RenderScript byte4 type back to the Android system.
Byte4	Class for exposing the native RenderScript byte4 type back to the Android system.
ByteArrayBuffer	A resizable byte array.
ByteArrayEntity	An entity whose content is retrieved from a byte array.
ByteArrayInputStream	A specialized `InputStream` for reading the contents of a byte array.
ByteArrayOutputStream	A specialized `OutputStream` for class for writing content to an (internal) byte array.
ByteBuffer	A buffer for bytes.
ByteChannel	A ByteChannel is both readable and writable.
ByteOrder	Defines byte order constants.

C

CacheRequest	`CacheRequest` is a kind of channel for storing resource data in the `ResponseCache` .
CacheResponse	A response cache entry.
Calendar	`Calendar` is an abstract base class for converting between a `Date` object and a set of integer fields such as `YEAR` , `MONTH` , `DAY` , `HOUR` , and so on.
CalendarContract	The contract between the calendar provider and applications.
CalendarContract.Attendees	Fields and helpers for interacting with Attendees.
CalendarContract.AttendeesColumns	Columns from the Attendees table that other tables join into themselves.
CalendarContract.CalendarAlerts	Fields and helpers for accessing calendar alerts information.
CalendarContract.CalendarAlertsColumns
CalendarContract.CalendarCache	CalendarCache stores some settings for calendar including the current time zone for the instances.
CalendarContract.CalendarCacheColumns
CalendarContract.CalendarColumns	Columns specific to the Calendars Uri that other Uris can query.
CalendarContract.CalendarEntity	Class that represents a Calendar Entity.
CalendarContract.Calendars	Constants and helpers for the Calendars table, which contains details for individual calendars.
CalendarContract.CalendarSyncColumns	Generic columns for use by sync adapters.
CalendarContract.Colors	Fields for accessing colors available for a given account.
CalendarContract.ColorsColumns
CalendarContract.EventDays	Fields and helpers for querying for a list of days that contain events.
CalendarContract.EventDaysColumns
CalendarContract.Events	Constants and helpers for the Events table, which contains details for individual events.
CalendarContract.EventsColumns	Columns from the Events table that other tables join into themselves.
CalendarContract.EventsEntity	Class that represents an Event Entity.
CalendarContract.ExtendedProperties	Fields for accessing the Extended Properties.
CalendarContract.ExtendedPropertiesColumns
CalendarContract.Instances	Fields and helpers for interacting with Instances.
CalendarContract.Reminders	Fields and helpers for accessing reminders for an event.
CalendarContract.RemindersColumns
CalendarContract.SyncColumns	Columns for Sync information used by Calendars and Events tables.
CalendarContract.SyncState	A table provided for sync adapters to use for storing private sync state data.
CalendarView	This class is a calendar widget for displaying and selecting dates.
CalendarView.OnDateChangeListener	The callback used to indicate the user changes the date.
Callable <V>	A task that returns a result and may throw an exception.
CallableStatement	An interface used to call Stored Procedures .
Callback	Defines an empty base interface for all `Callback` s used during authentication.
CallbackHandler	Needs to be implemented by classes that want to handle authentication `Callback` s.
CallLog	The CallLog provider contains information about placed and received calls.
CallLog.Calls	Contains the recent calls.
CamcorderProfile	Retrieves the predefined camcorder profile settings for camcorder applications.
Camera	A camera instance can be used to compute 3D transformations and generate a matrix that can be applied, for instance, on a `Canvas` .
Camera	The Camera class is used to set image capture settings, start/stop preview, snap pictures, and retrieve frames for encoding for video.
Camera.Area	The Area class is used for choosing specific metering and focus areas for the camera to use when calculating auto-exposure, auto-white balance, and auto-focus.
Camera.AutoFocusCallback	Callback interface used to notify on completion of camera auto focus.
Camera.AutoFocusMoveCallback	Callback interface used to notify on auto focus start and stop.
Camera.CameraInfo	Information about a camera
Camera.ErrorCallback	Callback interface for camera error notification.
Camera.Face	Information about a face identified through camera face detection.
Camera.FaceDetectionListener	Callback interface for face detected in the preview frame.
Camera.OnZoomChangeListener	Callback interface for zoom changes during a smooth zoom operation.
Camera.Parameters	Camera service settings.
Camera.PictureCallback	Callback interface used to supply image data from a photo capture.
Camera.PreviewCallback	Callback interface used to deliver copies of preview frames as they are displayed.
Camera.ShutterCallback	Callback interface used to signal the moment of actual image capture.
Camera.Size	Image size (width and height dimensions).
CameraProfile	The CameraProfile class is used to retrieve the pre-defined still image capture (jpeg) quality levels (0-100) used for low, medium, and high quality settings in the Camera application.
CancellationException	Exception indicating that the result of a value-producing task, such as a `FutureTask` , cannot be retrieved because the task was cancelled.
CancellationSignal	Provides the ability to cancel an operation in progress.
CancellationSignal.OnCancelListener	Listens for cancellation.
CancelledKeyException	A `CancelledKeyException` is thrown when an invalid selection key is used.
Canvas	The Canvas class holds the "draw" calls.
Canvas.EdgeType
Canvas.VertexMode
CaptioningManager	Contains methods for accessing and monitoring preferred video captioning state and visual properties.
CaptioningManager.CaptioningChangeListener	Listener for changes in captioning properties, including enabled state and user style preferences.
CaptioningManager.CaptionStyle	Specifies visual properties for video captions, including foreground and background colors, edge properties, and typeface.
CardEmulation	This class can be used to query the state of NFC card emulation services.
CDATASection	CDATA sections are used to escape blocks of text containing characters that would otherwise be regarded as markup.
CdmaCellLocation	Represents the cell location on a CDMA phone.
CellIdentityCdma	CellIdentity is to represent a unique CDMA cell
CellIdentityGsm	CellIdentity to represent a unique GSM cell
CellIdentityLte	CellIdentity is to represent a unique LTE cell
CellIdentityWcdma	CellIdentity to represent a unique UMTS cell
CellInfo	Immutable cell information from a point in time.
CellInfoCdma	Immutable cell information from a point in time.
CellInfoGsm	Immutable cell information from a point in time.
CellInfoLte	Immutable cell information from a point in time.
CellInfoWcdma	Immutable cell information from a point in time.
CellLocation	Abstract class that represents the location of the device.
CellSignalStrength	Abstract base class for cell phone signal strength related information.
CellSignalStrengthCdma	Signal strength related information.
CellSignalStrengthGsm	GSM signal strength related information.
CellSignalStrengthLte	LTE signal strength related information.
CellSignalStrengthWcdma	Wcdma signal strength related information.
Certificate	This interface was deprecated in API level 1. Use `Certificate` instead.
Certificate	Abstract class to represent identity certificates.
Certificate	Abstract class to represent identity certificates.
Certificate.CertificateRep	The alternate `Serializable` class to be used for serialization and deserialization of `Certificate` objects.
CertificateEncodingException	The exception that is thrown when an error occurs while a `Certificate` is being encoded.
CertificateEncodingException	The exception that is thrown when an error occurs while a `Certificate` is being encoded.
CertificateException	The base class for all `Certificate` related exceptions.
CertificateException	The base class for all `Certificate` related exceptions.
CertificateExpiredException	The exception that is thrown when a `Certificate` has expired.
CertificateExpiredException	The exception that is thrown when a `Certificate` has expired.
CertificateFactory	This class implements the functionality of a certificate factory algorithm, relying on parsing a stream of bytes.
CertificateFactorySpi	This class defines the Service Provider Interface ( SPI ) for the `CertificateFactory` class.
CertificateNotYetValidException	The exception that is thrown when a `Certificate` is not yet valid or will not yet be valid on a specified date.
CertificateNotYetValidException	The exception that is thrown when a `Certificate` is not yet valid.
CertificateParsingException	The exception that is thrown when a `Certificate` can not be parsed.
CertificateParsingException	The exception that is thrown when a `Certificate` can not be parsed.
CertPath	An immutable certificate path that can be validated.
CertPath.CertPathRep	The alternate `Serializable` class to be used for serialization and deserialization on `CertPath` objects.
CertPathBuilder	This class implements the functionality of a builder for an unverified Certification Path s from a specified certificate to a trust anchor.
CertPathBuilderException	The exception that is thrown when a `CertPathBuilder` method fails.
CertPathBuilderResult	The interface for results generated by `build(CertPathParameters)` .
CertPathBuilderSpi	The Service Provider Interface ( SPI ) for the `CertPathBuilder` class to be implemented by security providers.
CertPathParameters	The interface specification for certification path algorithm parameters.
CertPathTrustManagerParameters	Certification path parameters to provide to certification path based `TrustManager` .
CertPathValidator	This class provides the functionality for validating certification paths (certificate chains) establishing a trust chain from a certificate to a trust anchor.
CertPathValidatorException	The exception that is thrown when a certification path (or certificate chain) cannot be validated.
CertPathValidatorResult	The interface specification for certification path validation results.
CertPathValidatorSpi	The Service Provider Interface ( SPI ) for the `CertPathValidator` class to be implemented by security providers.
CertSelector	The interface specification to determine whether a `Certificate` meets some criteria.
CertStore	This class provides the functionality to retrieve `Certificate` s and `CRL` s from a read-only repository.
CertStoreException	The exception that is thrown when an access to a `CertStore` fails.
CertStoreParameters	The marker interface specifying the parameters used to initialize a `CertStore` instance.
CertStoreSpi	The Service Provider Interface ( SPI ) definition for the `CertStore` class to be implemented by security providers.
ChangeBounds	This transition captures the layout bounds of target views before and after the scene change and animates those changes during the transition.
Channel	A channel is a conduit to I/O services covering such items as files, sockets, hardware devices, I/O ports or some software component.
Channels	This class provides several utilities to get I/O streams from channels.
Character	The wrapper for the primitive type `char` .
Character.Subset
Character.UnicodeBlock	Represents a block of Unicode characters.
CharacterCodingException	A `CharacterCodingException` is thrown when an encoding or decoding error occurs.
CharacterData	The `CharacterData` interface extends Node with a set of attributes and methods for accessing character data in the DOM.
CharacterIterator	An interface for the bidirectional iteration over a group of characters.
CharacterPickerDialog	Dialog for choosing accented characters related to a base character.
CharacterStyle	The classes that affect character-level text formatting extend this class.
CharArrayBuffer	This is used for `copyStringToBuffer(int, CharArrayBuffer)`
CharArrayBuffer	A resizable char array.
CharArrayReader	A specialized `Reader` for reading the contents of a char array.
CharArrayWriter	A specialized `Writer` for class for writing content to an (internal) char array.
CharBuffer	A buffer of chars.
CharConversionException	The top level class for character conversion exceptions.
CharSequence	This interface represents an ordered set of characters and defines the methods to probe them.
Charset	A charset is a named mapping between Unicode characters and byte sequences.
CharsetDecoder	A converter that can convert a byte sequence from a charset into a 16-bit Unicode character sequence.
CharsetEncoder	Transforms a sequence of 16-bit Java characters to a byte sequence in some encoding.
CharsetProvider	The service provider class for character sets.
Checkable	Defines an extension for views that make them checkable.
CheckBox	A checkbox is a specific type of two-states button that can be either checked or unchecked.
CheckBoxPreference	A `Preference` that provides checkbox widget functionality.
CheckedInputStream	The `CheckedInputStream` class is used to maintain a checksum at the same time as the data, on which the checksum is computed, is read from a stream.
CheckedOutputStream	The `CheckedOutputStream` class is used to maintain a running checksum of all data written to a stream.
CheckedTextView	An extension to TextView that supports the `Checkable` interface.
Checksum	The interface common to checksum classes such as `Adler32` and `CRC32` .
ChoiceFormat	Returns a fixed string based on a numeric value.
Choreographer	Coordinates the timing of animations, input and drawing.
Choreographer.FrameCallback	Implement this interface to receive a callback when a new display frame is being rendered.
Chronometer	Class that implements a simple timer.
Chronometer.OnChronometerTickListener	A callback that notifies when the chronometer has incremented on its own.
ChunkedInputStream	Implements chunked transfer coding.
ChunkedOutputStream	Implements chunked transfer coding.
Cipher	This class provides access to implementations of cryptographic ciphers for encryption and decryption.
CipherInputStream	This class wraps an `InputStream` and a cipher so that `read()` methods return data that are read from the underlying `InputStream` and processed by the cipher.
CipherOutputStream	This class wraps an output stream and a cipher so that `write` methods send the data through the cipher before writing them to the underlying output stream.
CipherSpi	This class defines the Service Provider Interface ( SPI ) for cryptographic ciphers.
CircularArray <E>	A circular array implementation that provides O(1) random read and O(1) prepend and O(1) append.
CircularRedirectException	Signals a circular redirect
Class <T>	The in-memory representation of a Java class.
ClassCastException	Thrown when a program attempts to cast a an object to a type with which it is not compatible.
ClassCircularityError	Thrown when the VM notices that an attempt is made to load a class which would directly or indirectly inherit from one of its subclasses.
ClassFormatError	Thrown by a class loader when a class file has an illegal format or if the data that it contains can not be interpreted as a class.
ClassLoader	Loads classes and resources from a repository.
ClassNotFoundException	Thrown when a class loader is unable to find a class.
ClickableSpan	If an object of this type is attached to the text of a TextView with a movement method of LinkMovementMethod, the affected spans of text can be selected.
ClientConnectionManager	Management interface for `client connections` .
ClientConnectionManagerFactory	A factory for creating new `ClientConnectionManager` instances.
ClientConnectionOperator	Interface for opening `connections` .
ClientConnectionRequest	Encapsulates a request for a `ManagedClientConnection` .
ClientContext	`Context` attribute names for client.
ClientContextConfigurer
ClientCookie	ClientCookie extends the standard `Cookie` interface with additional client specific functionality such ability to retrieve original cookie attributes exactly as they were specified by the origin server.
ClientInfoStatus	An enumeration to describe the reason why a property cannot be set by calling Connection.setClientInfo.
ClientParamBean
ClientParamsStack	Represents a stack of parameter collections.
ClientPNames	Parameter names for the HttpClient module.
ClientProtocolException	Signals an error in the HTTP protocol.
ClipboardManager	Interface to the clipboard service, for placing and retrieving text in the global clipboard.
ClipboardManager	This class was deprecated in API level 11. Old text-only interface to the clipboard. See `ClipboardManager` for the modern API.
ClipboardManager.OnPrimaryClipChangedListener	Defines a listener callback that is invoked when the primary clip on the clipboard changes.
ClipData	Representation of a clipped data on the clipboard.
ClipData.Item	Description of a single item in a ClippedData.
ClipDescription	Meta-data describing the contents of a `ClipData` .
ClipDrawable	A Drawable that clips another Drawable based on this Drawable's current level value.
Clob	A Java interface mapping for the SQL CLOB type.
Cloneable	This (empty) interface must be implemented by all classes that wish to support cloning.
CloneNotSupportedException	Thrown when a program attempts to clone an object which does not support the `Cloneable` interface.
CloneUtils	A collection of utilities to workaround limitations of Java clone framework.
Closeable	An `AutoCloseable` whose close method may throw an `IOException` .
ClosedByInterruptException	A `ClosedByInterruptException` is thrown when a thread is interrupted in a blocking I/O operation.
ClosedChannelException	A `ClosedChannelException` is thrown when a channel is closed for the type of operation attempted.
ClosedSelectorException	A `ClosedSelectorException` is thrown when a `selector` is closed and an I/O operation is attempted.
CoderMalfunctionError	A `CoderMalfunctionError` is thrown when the encoder/decoder is malfunctioning.
CoderResult	Used to indicate the result of encoding/decoding.
CodeSigner	`CodeSigner` represents a signer of code.
CodeSource	Legacy security code; do not use.
CodingErrorAction	Used to indicate what kind of actions to take in case of encoding/decoding errors.
CollapsibleActionView	When a `View` implements this interface it will receive callbacks when expanded or collapsed as an action view alongside the optional, app-specified callbacks to `MenuItemCompat.OnActionExpandListener` .
CollapsibleActionView	When a `View` implements this interface it will receive callbacks when expanded or collapsed as an action view alongside the optional, app-specified callbacks to `MenuItem.OnActionExpandListener` .
CollationElementIterator	Created by a `RuleBasedCollator` to iterate through a string.
CollationKey	Represents a string under the rules of a specific `Collator` object.
Collator	Performs locale-sensitive string comparison.
Collection <E>	`Collection` is the root of the collection hierarchy.
CollectionCertStoreParameters	The parameters to initialize a Collection type `CertStore` instance.
Collections	`Collections` contains static methods which operate on `Collection` classes.
Color	The Color class defines methods for creating and converting color ints.
ColorDrawable	A specialized Drawable that fills the Canvas with a specified color.
ColorFilter
ColorMatrix	4x5 matrix for transforming the color+alpha components of a Bitmap.
ColorMatrixColorFilter
ColorRes	Denotes that an integer parameter, field or method return value is expected to be a color resource reference (e.g.
ColorStateList	Lets you map `View` state sets to colors.
Comment	This interface inherits from `CharacterData` and represents the content of a comment, i.e., all the characters between the starting ' `<!--` ' and ending ' `-->` '.
CommonDataSource	Interface that defines the methods which are common between DataSource, XADataSource and ConnectionPoolDataSource.
Comparable <T>	This interface should be implemented by all classes that wish to define a natural order of their instances.
Comparator <T>	A `Comparator` is used to compare two objects to determine their ordering with respect to each other.
ComparisonFailure	This class was deprecated in API level 16. use junit.framework.ComparisonFailure
ComparisonFailure	Thrown when an assert equals for Strings failed.
Compiler	Does nothing on Android.
CompletionInfo	Information about a single text completion that an editor has reported to an input method.
CompletionService <V>	A service that decouples the production of new asynchronous tasks from the consumption of the results of completed tasks.
ComponentCallbacks	The set of callback APIs that are common to all application components ( `Activity` , `Service` , `ContentProvider` , and `Application` ).
ComponentCallbacks2	Extended `ComponentCallbacks` interface with a new callback for finer-grained memory management.
ComponentInfo	Base class containing information common to all application components ( `ActivityInfo` , `ServiceInfo` ).
ComponentName	Identifier for a specific application component ( `Activity` , `Service` , `BroadcastReceiver` , or `ContentProvider` ) that is available.
ComposePathEffect
ComposeShader	A subclass of shader that returns the composition of two other shaders, combined by an `Xfermode` subclass.
CompoundButton	A button with two states, checked and unchecked.
CompoundButton.OnCheckedChangeListener	Interface definition for a callback to be invoked when the checked state of a compound button changed.
ConcurrentHashMap <K, V>	A hash table supporting full concurrency of retrievals and high expected concurrency for updates.
ConcurrentLinkedQueue <E>	An unbounded thread-safe `queue` based on linked nodes.
ConcurrentMap <K, V>	A `Map` providing additional atomic `putIfAbsent` , `remove` , and `replace` methods.
ConcurrentModificationException	An `ConcurrentModificationException` is thrown when a Collection is modified and an existing iterator on the Collection is used to modify the Collection as well.
ConcurrentNavigableMap <K, V>	A `ConcurrentMap` supporting `NavigableMap` operations, and recursively so for its navigable sub-maps.
ConcurrentSkipListMap <K, V>	A scalable concurrent `ConcurrentNavigableMap` implementation.
ConcurrentSkipListSet <E>	A scalable concurrent `NavigableSet` implementation based on a `ConcurrentSkipListMap` .
Condition	`Condition` factors out the `Object` monitor methods ( `wait` , `notify` and `notifyAll` ) into distinct objects to give the effect of having multiple wait-sets per object, by combining them with the use of arbitrary `Lock` implementations.
ConditionVariable	Class that implements the condition variable locking paradigm.
Config	This class was deprecated in API level 14. This class is not useful, it just returns the same value for all constants, and has always done this. Do not use it.
Configuration	This class describes all device configuration information that can impact the resources the application retrieves.
ConfigurationInfo	Information you can retrieve about hardware configuration preferences declared by an application.
ConnConnectionParamBean	Allows for setting parameters relating to connections on `HttpParams` .
ConnConnectionPNames	Parameter names for connections in HttpConn.
ConnectException	A `ConnectException` is thrown if a connection cannot be established to a remote host on a specific port.
Connection	A connection represents a link from a Java application to a database.
ConnectionClosedException	Indicates that a connection has been closed.
ConnectionEvent	Sent when specific events happen on a `PooledConnection` object.
ConnectionEventListener	An interface used to receive events generated by a `PooledConnection` .
ConnectionKeepAliveStrategy	Interface for deciding how long a connection can remain idle before being reused.
ConnectionPendingException	A `ConnectionPendingException` is thrown when an attempt is made to connect a `SocketChannel` that has a non-blocking connection already underway.
ConnectionPoolDataSource	An interface for the creation of `ConnectionPoolDataSource` objects.
ConnectionPoolTimeoutException	A timeout while waiting for an available connection from a connection manager.
ConnectionReleaseTrigger	Interface for releasing a connection.
ConnectionReuseStrategy	Interface for deciding whether a connection should be kept alive.
ConnectivityManager	Class that answers queries about the state of network connectivity.
ConnectivityManagerCompat	Helper for accessing features in `ConnectivityManager` introduced after API level 16 in a backwards compatible fashion.
ConnectTimeoutException	A timeout while connecting to an HTTP server or waiting for an available connection from an HttpConnectionManager.
ConnManagerParamBean	Allows for setting parameters relating to connection managers on `HttpParams` .
ConnManagerParams	This class represents a collection of HTTP protocol parameters applicable to client-side `connection managers` .
ConnManagerPNames	Parameter names for connection managers in HttpConn.
ConnPerRoute	This interface is intended for looking up maximum number of connections allowed for for a given route.
ConnPerRouteBean	This class maintains a map of HTTP routes to maximum number of connections allowed for those routes.
ConnPoolByRoute	A connection pool that maintains connections by route.
ConnRouteParamBean	Allows for setting parameters relating to connection routes on `HttpParams` .
ConnRouteParams	An adaptor for accessing route related parameters in `HttpParams` .
ConnRoutePNames	Parameter names for routing in HttpConn.
Console	Provides access to the console, if available.
ConsoleHandler	A handler that writes log messages to the standard output stream `System.err` .
ConsoleMessage	Public class representing a JavaScript console message from WebCore.
ConsoleMessage.MessageLevel
Constructor <T>	This class represents a constructor.
ConsumerIrManager	Class that operates consumer infrared on the device.
ConsumerIrManager.CarrierFrequencyRange	Represents a range of carrier frequencies (inclusive) on which the infrared transmitter can transmit
Contacts	This class was deprecated in API level 5. The APIs have been superseded by `ContactsContract` . The newer APIs allow access multiple accounts and support aggregation of similar contacts. These APIs continue to work but will only return data for the first Google account created, which matches the original behavior.
Contacts.ContactMethods	This class was deprecated in API level 5. see `ContactsContract`
Contacts.ContactMethodsColumns	This interface was deprecated in API level 5. see `ContactsContract`
Contacts.Extensions	This class was deprecated in API level 5. see `ContactsContract`
Contacts.ExtensionsColumns	This interface was deprecated in API level 5. see `ContactsContract`
Contacts.GroupMembership	This class was deprecated in API level 5. see `ContactsContract`
Contacts.Groups	This class was deprecated in API level 5. see `ContactsContract`
Contacts.GroupsColumns	This interface was deprecated in API level 5. see `ContactsContract`
Contacts.Intents	This class was deprecated in API level 5. see `ContactsContract`
Contacts.Intents.Insert	This class was deprecated in API level 5. see `ContactsContract`
Contacts.Intents.UI	This class was deprecated in API level 5. see `ContactsContract`
Contacts.OrganizationColumns	This interface was deprecated in API level 5. see `ContactsContract`
Contacts.Organizations	This class was deprecated in API level 5. see `ContactsContract`
Contacts.People	This class was deprecated in API level 5. see `ContactsContract`
Contacts.People.ContactMethods	This class was deprecated in API level 5. see `ContactsContract`
Contacts.People.Extensions	This class was deprecated in API level 5. see `ContactsContract`
Contacts.People.Phones	This class was deprecated in API level 5. see `ContactsContract`
Contacts.PeopleColumns	This interface was deprecated in API level 5. see `ContactsContract`
Contacts.Phones	This class was deprecated in API level 5. see `ContactsContract`
Contacts.PhonesColumns	This interface was deprecated in API level 5. see `ContactsContract`
Contacts.Photos	This class was deprecated in API level 5. see `ContactsContract`
Contacts.PhotosColumns	This interface was deprecated in API level 5. see `ContactsContract`
Contacts.PresenceColumns	This interface was deprecated in API level 5. see `ContactsContract`
Contacts.Settings	This class was deprecated in API level 5. see `ContactsContract`
Contacts.SettingsColumns	This interface was deprecated in API level 5. see `ContactsContract`
ContactsContract	The contract between the contacts provider and applications.
ContactsContract.AggregationExceptions	Constants for the contact aggregation exceptions table, which contains aggregation rules overriding those used by automatic aggregation.
ContactsContract.BaseSyncColumns	Generic columns for use by sync adapters.
ContactsContract.CommonDataKinds	Container for definitions of common data types stored in the `ContactsContract.Data` table.
ContactsContract.CommonDataKinds.BaseTypes	The base types that all "Typed" data kinds support.
ContactsContract.CommonDataKinds.CommonColumns	Columns common across the specific types.
ContactsContract.CommonDataKinds.Contactables	A special class of data items, used to refer to types of data that can be used to attempt to start communicating with a person ( `ContactsContract.CommonDataKinds.Phone` and `ContactsContract.CommonDataKinds.Email` ).
ContactsContract.CommonDataKinds.Email	A data kind representing an email address.
ContactsContract.CommonDataKinds.Event	A data kind representing an event.
ContactsContract.CommonDataKinds.GroupMembership	Group Membership.
ContactsContract.CommonDataKinds.Identity	A data kind representing an Identity related to the contact.
ContactsContract.CommonDataKinds.Im	A data kind representing an IM address You can use all columns defined for `ContactsContract.Data` as well as the following aliases.
ContactsContract.CommonDataKinds.Nickname	A data kind representing the contact's nickname.
ContactsContract.CommonDataKinds.Note	Notes about the contact.
ContactsContract.CommonDataKinds.Organization	A data kind representing an organization.
ContactsContract.CommonDataKinds.Phone	A data kind representing a telephone number.
ContactsContract.CommonDataKinds.Photo	A data kind representing a photo for the contact.
ContactsContract.CommonDataKinds.Relation	A data kind representing a relation.
ContactsContract.CommonDataKinds.SipAddress	A data kind representing a SIP address for the contact.
ContactsContract.CommonDataKinds.StructuredName	A data kind representing the contact's proper name.
ContactsContract.CommonDataKinds.StructuredPostal	A data kind representing a postal addresses.
ContactsContract.CommonDataKinds.Website	A data kind representing a website related to the contact.
ContactsContract.ContactNameColumns	Contact name and contact name metadata columns in the RawContacts table.
ContactsContract.ContactOptionsColumns	Columns of `ContactsContract.Contacts` that track the user's preferences for, or interactions with, the contact.
ContactsContract.Contacts	Constants for the contacts table, which contains a record per aggregate of raw contacts representing the same person.
ContactsContract.Contacts.AggregationSuggestions	A read-only sub-directory of a single contact aggregate that contains all aggregation suggestions (other contacts).
ContactsContract.Contacts.Data	A sub-directory of a single contact that contains all of the constituent raw contact `ContactsContract.Data` rows.
ContactsContract.Contacts.Entity	A sub-directory of a contact that contains all of its `ContactsContract.RawContacts` as well as `ContactsContract.Data` rows.
ContactsContract.Contacts.Photo	A read-only sub-directory of a single contact that contains the contact's primary photo.
ContactsContract.Contacts.StreamItems	A sub-directory of a single contact that contains all of the constituent raw contact `ContactsContract.StreamItems` rows.
ContactsContract.ContactsColumns	Columns of `ContactsContract.Contacts` that refer to intrinsic properties of the contact, as opposed to the user-specified options found in `ContactsContract.ContactOptionsColumns` .
ContactsContract.ContactStatusColumns
ContactsContract.Data	Constants for the data table, which contains data points tied to a raw contact.
ContactsContract.DataColumns	Columns in the Data table.
ContactsContract.DataColumnsWithJoins	Combines all columns returned by `ContactsContract.Data` table queries.
ContactsContract.DataUsageFeedback	API allowing applications to send usage information for each `ContactsContract.Contacts.Data` row to the Contacts Provider.
ContactsContract.DataUsageStatColumns	Columns in the Data_Usage_Stat table
ContactsContract.DeletedContacts	Constants for the deleted contact table.
ContactsContract.DeletedContactsColumns
ContactsContract.Directory	A Directory represents a contacts corpus, e.g.
ContactsContract.DisplayNameSources	Types of data used to produce the display name for a contact.
ContactsContract.DisplayPhoto	Helper class for accessing full-size photos by photo file ID.
ContactsContract.FullNameStyle	Constants for various styles of combining given name, family name etc into a full name.
ContactsContract.Groups	Constants for the groups table.
ContactsContract.GroupsColumns
ContactsContract.Intents	Contains helper classes used to create or manage `Intents` that involve contacts.
ContactsContract.Intents.Insert	Convenience class that contains string constants used to create contact `Intents` .
ContactsContract.PhoneLookup	A table that represents the result of looking up a phone number, for example for caller ID.
ContactsContract.PhoneLookupColumns
ContactsContract.PhoneticNameStyle	Constants for various styles of capturing the pronunciation of a person's name.
ContactsContract.Presence	This class was deprecated in API level 5. This old name was never meant to be made public. Do not use.
ContactsContract.PresenceColumns	Additional data mixed in with `ContactsContract.ContactStatusColumns` to link back to specific `_ID` entries.
ContactsContract.Profile	Constants for the user's profile data, which is represented as a single contact on the device that represents the user.
ContactsContract.ProfileSyncState	A table provided for sync adapters to use for storing private sync state data for the user's personal profile.
ContactsContract.QuickContact	Helper methods to display QuickContact dialogs that allow users to pivot on a specific `Contacts` entry.
ContactsContract.RawContacts	Constants for the raw contacts table, which contains one row of contact information for each person in each synced account.
ContactsContract.RawContacts.Data	A sub-directory of a single raw contact that contains all of its `ContactsContract.Data` rows.
ContactsContract.RawContacts.DisplayPhoto	A sub-directory of a single raw contact that represents its primary display photo.
ContactsContract.RawContacts.Entity	A sub-directory of a single raw contact that contains all of its `ContactsContract.Data` rows.
ContactsContract.RawContacts.StreamItems	A sub-directory of a single raw contact that contains all of its `ContactsContract.StreamItems` rows.
ContactsContract.RawContactsColumns
ContactsContract.RawContactsEntity	Constants for the raw contacts entities table, which can be thought of as an outer join of the raw_contacts table with the data table.
ContactsContract.Settings	Contacts-specific settings for various `Account` 's.
ContactsContract.SettingsColumns
ContactsContract.StatusColumns	Social status update columns.
ContactsContract.StatusUpdates	A status update is linked to a `ContactsContract.Data` row and captures the user's latest status update via the corresponding source, e.g.
ContactsContract.StreamItemPhotos	Constants for the stream_item_photos table, which contains photos associated with social stream updates.
ContactsContract.StreamItemPhotosColumns	Columns in the StreamItemPhotos table.
ContactsContract.StreamItems	Constants for the stream_items table, which contains social stream updates from the user's contact list.
ContactsContract.StreamItems.StreamItemPhotos	A sub-directory of a single stream item entry that contains all of its photo rows.
ContactsContract.StreamItemsColumns	Columns in the StreamItems table.
ContactsContract.SyncColumns	Columns that appear when each row of a table belongs to a specific account, including sync information that an account may need.
ContactsContract.SyncState	A table provided for sync adapters to use for storing private sync state data for contacts.
ContentHandler	This class converts the content of a certain format (i.e.
ContentHandler	Receive notification of the logical content of a document.
ContentHandlerFactory	Defines a factory which is responsible for creating a `ContentHandler` .
ContentLengthInputStream	Stream that cuts off after a specified number of bytes.
ContentLengthOutputStream	A stream wrapper that closes itself after a defined number of bytes.
ContentLengthStrategy	Represents a strategy to determine the content length based on the properties of an HTTP message.
ContentLoadingProgressBar	ContentLoadingProgressBar implements a ProgressBar that waits a minimum time to be dismissed before showing.
ContentObservable	A specialization of `Observable` for `ContentObserver` that provides methods for sending notifications to a list of `ContentObserver` objects.
ContentObserver	Receives call backs for changes to content.
ContentProducer	An abstract entity content producer.
ContentProvider	Content providers are one of the primary building blocks of Android applications, providing content to applications.
ContentProvider.PipeDataWriter <T>	Interface to write a stream of data to a pipe.
ContentProviderClient	The public interface object used to interact with a `ContentProvider` .
ContentProviderOperation
ContentProviderOperation.Builder	Used to add parameters to a `ContentProviderOperation` .
ContentProviderResult	Contains the result of the application of a `ContentProviderOperation` .
ContentQueryMap	Caches the contents of a cursor into a Map of String->ContentValues and optionally keeps the cache fresh by registering for updates on the content backing the cursor.
ContentResolver	This class provides applications access to the content model.
ContentUris	Utility methods useful for working with `Uri` objects that use the "content" (content://) scheme.
ContentValues	This class is used to store a set of values that the `ContentResolver` can process.
Context	Interface to global information about an application environment.
ContextCompat	Helper for accessing features in `Context` introduced after API level 4 in a backwards compatible fashion.
ContextMenu	Extension of `Menu` for context menus providing functionality to modify the header of the context menu.
ContextMenu.ContextMenuInfo	Additional information regarding the creation of the context menu.
ContextThemeWrapper	A ContextWrapper that allows you to modify the theme from what is in the wrapped context.
ContextWrapper	Proxying implementation of Context that simply delegates all of its calls to another Context.
Cookie	HTTP "magic-cookie" represents a piece of state information that the HTTP agent and the target server can exchange to maintain a session.
CookieAttributeHandler	Ths interface represents a cookie attribute handler responsible for parsing, validating, and matching a specific cookie attribute, such as path, domain, port, etc.
CookieHandler	This class provides a way to manage cookies with a HTTP protocol handler.
CookieIdentityComparator	This cookie comparator can be used to compare identity of cookies.
CookieManager	Manages the cookies used by an application's `WebView` instances.
CookieManager	This class provides a concrete implementation of CookieHandler.
CookieOrigin	CookieOrigin class incapsulates details of an origin server that are relevant when parsing, validating or matching HTTP cookies.
CookiePathComparator	This cookie comparator ensures that multiple cookies satisfying a common criteria are ordered in the `Cookie` header such that those with more specific Path attributes precede those with less specific.
CookiePolicy	CookiePolicy has three pre-defined policy.
CookiePolicy
CookieSpec	Defines the cookie management specification.
CookieSpecBase	Cookie management functions shared by all specification.
CookieSpecFactory
CookieSpecParamBean
CookieSpecPNames	Parameter names for cookie specifications in HttpCookie.
CookieSpecRegistry	Cookie specification registry that can be used to obtain the corresponding cookie specification implementation for a given type of type or version of cookie.
CookieStore	A CookieStore object is a repository for cookies.
CookieStore	Abstract cookie store.
CookieSyncManager	The CookieSyncManager is used to synchronize the browser cookie store between RAM and permanent storage.
CopyOnWriteArrayList <E>	A thread-safe random-access list.
CopyOnWriteArraySet <E>	A `Set` that uses an internal `CopyOnWriteArrayList` for all of its operations.
CoreConnectionPNames	Defines parameter names for connections in HttpCore.
CoreProtocolPNames	Defines parameter names for protocol execution in HttpCore.
CornerPathEffect
CorrectionInfo	Information about a single text correction that an editor has reported to an input method.
CountDownLatch	A synchronization aid that allows one or more threads to wait until a set of operations being performed in other threads completes.
CountDownTimer	Schedule a countdown until a time in the future, with regular notifications on intervals along the way.
CRC32	The CRC32 class is used to compute a CRC32 checksum from data provided as input value.
Credentials	A class for representing UNIX credentials passed via ancillary data on UNIX domain sockets.
Credentials	User name and password based authentication credentials.
CredentialsProvider	Abstract credentials provider.
Criteria	A class indicating the application criteria for selecting a location provider.
CRL	This class represents Certificate Revocation Lists (CRLs) maintained by a certificate authority.
CRLException	The exception that is thrown if errors occur during handling of `CRL` s.
CRLSelector	The interface specification for determining whether a CRL meets some criteria to select CRL objects among a set of `CRL` s.
CrossProcessCursor	A cross process cursor is an extension of a `Cursor` that also supports usage from remote processes.
CrossProcessCursorWrapper	Cursor wrapper that implements `CrossProcessCursor` .
Currency	A currency corresponding to an ISO 4217 currency code such as "EUR" or "USD".
Cursor	This interface provides random read-write access to the result set returned by a database query.
CursorAdapter	Static library support version of the framework's `CursorAdapter` .
CursorAdapter	Adapter that exposes data from a `Cursor` to a `ListView` widget.
CursorIndexOutOfBoundsException	An exception indicating that a cursor is out of bounds.
CursorJoiner	Does a join on two cursors using the specified columns.
CursorJoiner.Result	The result of a call to next().
CursorLoader	A loader that queries the `ContentResolver` and returns a `Cursor` .
CursorLoader	Static library support version of the framework's `CursorLoader` .
CursorTreeAdapter	An adapter that exposes data from a series of `Cursor` s to an `ExpandableListView` widget.
CursorWindow	A buffer containing multiple cursor rows.
CursorWrapper	Wrapper class for Cursor that delegates all calls to the actual cursor object.
CycleInterpolator	Repeats the animation for a specified number of cycles.
CyclicBarrier	A synchronization aid that allows a set of threads to all wait for each other to reach a common barrier point.

D

DashPathEffect
DatabaseErrorHandler	An interface to let the apps define the actions to take when the following errors are detected database corruption
DatabaseMetaData	An interface which provides comprehensive information about the database management system and its supported features.
DatabaseUtils	Static utility methods for dealing with databases and `Cursor` s.
DatabaseUtils.InsertHelper	This class was deprecated in API level 17. Use `SQLiteStatement` instead.
DatabaseUtilsCompat	Helper for accessing features in `DatabaseUtils` introduced after API level 4 in a backwards compatible fashion.
DataFormatException	`DataFormatException` is used to indicate an error in the format of a particular data stream which is to be uncompressed.
DatagramChannel	A `DatagramChannel` is a selectable channel that represents a partial abstraction of a datagram socket.
DatagramPacket	This class represents a datagram packet which contains data either to be sent or received through a `DatagramSocket` .
DatagramSocket	This class implements a UDP socket for sending and receiving `DatagramPacket` .
DatagramSocketImpl	The abstract superclass for datagram and multicast socket implementations.
DatagramSocketImplFactory	This interface defines a factory for datagram socket implementations.
DataInput	Defines an interface for classes that are able to read big-endian typed data from some source.
DataInputStream	Wraps an existing `InputStream` and reads big-endian typed data from it.
DataOutput	Defines an interface for classes that are able to write big-endian typed data to some target.
DataOutputStream	Wraps an existing `OutputStream` and writes big-endian typed data to it.
DataSetObservable	A specialization of `Observable` for `DataSetObserver` that provides methods for sending notifications to a list of `DataSetObserver` objects.
DataSetObserver	Receives call backs when a data set has been changed, or made invalid.
DataSource	An interface for the creation of `Connection` objects which represent a connection to a database.
DataTruncation	An exception which is thrown when a JDBC driver unexpectedly truncates a data value either when reading (resulting in warning), or when writing data (resulting in an error).
DatatypeConfigurationException	Indicates a serious configuration error.
DatatypeConstants	Utility class to contain basic Datatype values as constants.
DatatypeConstants.Field	Type-safe enum class that represents six fields of the `Duration` class.
DatatypeFactory	Factory that creates new `javax.xml.datatype` `Object` s that map XML to/from Java `Object` s.
Date	A class which can consume and produce dates in SQL `Date` format.
Date	A specific moment in time, with millisecond precision.
DateFormat	Utility class for producing strings with formatted date/time.
DateFormat	Formats or parses dates and times.
DateFormat.Field	The instances of this inner class are used as attribute keys and values in `AttributedCharacterIterator` that the `formatToCharacterIterator(Object)` method returns.
DateFormatSymbols	Encapsulates localized date-time formatting data, such as the names of the months, the names of the days of the week, and the time zone data.
DateKeyListener	For entering dates in a text field.
DateParseException	An exception to indicate an error parsing a date string.
DatePicker	This class is a widget for selecting a date.
DatePicker.OnDateChangedListener	The callback used to indicate the user changes\d the date.
DatePickerDialog	A simple dialog containing an `DatePicker` .
DatePickerDialog.OnDateSetListener	The callback used to indicate the user is done filling in the date.
DateSorter	Sorts dates into the following groups: Today Yesterday seven days ago one month ago older than a month ago
DateTimeKeyListener	For entering dates and times in the same text field.
DateUtils	This class contains various date-related utilities for creating text for things like elapsed time and date ranges, strings for days of the week and months, and AM/PM text etc.
DateUtils	A utility class for parsing and formatting HTTP dates as used in cookies and other headers.
DeadObjectException	The object you are calling has died, because its hosting process no longer exists.
Debug	Provides various debugging methods for Android applications, including tracing and allocation counts.
Debug.InstructionCount	API for gathering and querying instruction counts.
Debug.MemoryInfo	This class is used to retrieved various statistics about the memory mappings for this process.
DebugUtils	Various utilities for debugging and logging.
DecelerateInterpolator	An interpolator where the rate of change starts out quickly and and then decelerates.
DecimalFormat	A concrete subclass of `NumberFormat` that formats decimal numbers.
DecimalFormatSymbols	Encapsulates the set of symbols (such as the decimal separator, the grouping separator, and so on) needed by `DecimalFormat` to format numbers.
DeclHandler	SAX2 extension handler for DTD declaration events.
DefaultClientConnection	Default implementation of an operated client connection.
DefaultClientConnectionOperator	Default implementation of a `ClientConnectionOperator` .
DefaultConnectionKeepAliveStrategy	Default implementation of a strategy deciding duration that a connection can remain idle.
DefaultConnectionReuseStrategy	Default implementation of a strategy deciding about connection re-use.
DefaultDatabaseErrorHandler	Default class used to define the actions to take when the database corruption is reported by sqlite.
DefaultedHttpContext	`HttpContext` implementation that delegates resolution of an attribute to the given default `HttpContext` instance if the attribute is not present in the local one.
DefaultedHttpParams	`HttpParams` implementation that delegates resolution of a parameter to the given default `HttpParams` instance if the parameter is not present in the local one.
DefaultHandler	Default base class for SAX2 event handlers.
DefaultHandler2	This class extends the SAX2 base handler class to support the SAX2 `LexicalHandler` , `DeclHandler` , and `EntityResolver2` extensions.
DefaultHttpClient	Default implementation of an HTTP client.
DefaultHttpClientConnection	Default implementation of a client-side HTTP connection.
DefaultHttpRequestFactory	Default implementation of a factory for creating request objects.
DefaultHttpRequestRetryHandler	The default `HttpRequestRetryHandler` used by request executors.
DefaultHttpResponseFactory	Default implementation of a factory for creating response objects.
DefaultHttpRoutePlanner	Default implementation of an `HttpRoutePlanner` .
DefaultHttpServerConnection	Default implementation of a server-side HTTP connection.
DefaultProxyAuthenticationHandler
DefaultRedirectHandler	Default implementation of `RedirectHandler` .
DefaultRequestDirector	Default implementation of `RequestDirector` .
DefaultResponseParser
DefaultTargetAuthenticationHandler
DefaultUserTokenHandler
Deflater	This class compresses data using the DEFLATE algorithm (see specification ).
DeflaterInputStream	An `InputStream` filter to compress data.
DeflaterOutputStream	This class provides an implementation of `FilterOutputStream` that compresses data using the DEFLATE algorithm.
Delayed	A mix-in style interface for marking objects that should be acted upon after a given delay.
DelayQueue <E extends Delayed >	An unbounded `blocking queue` of `Delayed` elements, in which an element can only be taken when its delay has expired.
DeniedByServerException	Exception thrown when the provisioning server or key server denies a certficate or license for a device.
Deprecated	Annotation type used to mark program elements that should no longer be used by programmers.
Deque <E>	A linear collection that supports element insertion and removal at both ends.
DESedeKeySpec	The key specification for a triple-DES (DES-EDE) key.
DESKeySpec	The key specification for a DES key.
Destroyable	Allows for special treatment of sensitive information, when it comes to destroying or clearing of the data.
DestroyFailedException	Signals that the `destroy()` method failed.
DeviceAdminInfo	This class is used to specify meta information of a device administrator component.
DeviceAdminReceiver	Base class for implementing a device administration component.
DevicePolicyManager	Public interface for managing policies enforced on a device.
DexClassLoader	A class loader that loads classes from `.jar` and `.apk` files containing a `classes.dex` entry.
DexFile	Manipulates DEX files.
DhcpInfo	A simple object for retrieving the results of a DHCP request.
DHGenParameterSpec	The algorithm parameter specification for generating Diffie-Hellman parameters used in Diffie-Hellman key agreement.
DHKey	The interface for a Diffie-Hellman key.
DHParameterSpec	The algorithm parameter specification for the Diffie-Hellman algorithm.
DHPrivateKey	The interface for a private key in the Diffie-Hellman key exchange protocol.
DHPrivateKeySpec	The key specification for a Diffie-Hellman private key.
DHPublicKey	The interface for a public key in the Diffie-Hellman key exchange protocol.
DHPublicKeySpec	The key specification for a Diffie-Hellman public key.
DialerFilter
DialerKeyListener	For dialing-only text entry As for all implementations of `KeyListener` , this class is only concerned with hardware keyboards.
Dialog	Base class for Dialogs.
DialogFragment	A fragment that displays a dialog window, floating on top of its activity's window.
DialogFragment	Static library support version of the framework's `DialogFragment` .
DialogInterface
DialogInterface.OnCancelListener	Interface used to allow the creator of a dialog to run some code when the dialog is canceled.
DialogInterface.OnClickListener	Interface used to allow the creator of a dialog to run some code when an item on the dialog is clicked..
DialogInterface.OnDismissListener	Interface used to allow the creator of a dialog to run some code when the dialog is dismissed.
DialogInterface.OnKeyListener	Interface definition for a callback to be invoked when a key event is dispatched to this dialog.
DialogInterface.OnMultiChoiceClickListener	Interface used to allow the creator of a dialog to run some code when an item in a multi-choice dialog is clicked.
DialogInterface.OnShowListener	Interface used to allow the creator of a dialog to run some code when the dialog is shown.
DialogPreference	A base class for `Preference` objects that are dialog-based.
Dictionary <K, V>	Note: Do not use this class since it is obsolete.
DigestException	`DigestException` is a general message digest exception.
DigestInputStream	`DigestInputStream` is a `FilterInputStream` which maintains an associated message digest.
DigestOutputStream	`DigestOutputStream` is a `FilterOutputStream` which maintains an associated message digest.
DigestScheme	Digest authentication scheme as defined in RFC 2617.
DigestSchemeFactory
DigitalClock	This class was deprecated in API level 17. It is recommended you use `TextClock` instead.
DigitsKeyListener	For digits-only text entry As for all implementations of `KeyListener` , this class is only concerned with hardware keyboards.
DimenRes	Denotes that an integer parameter, field or method return value is expected to be a dimension resource reference (e.g.
DiscretePathEffect
Display	Provides information about the size and density of a logical display.
DisplayManager	Manages the properties of attached displays.
DisplayManager.DisplayListener	Listens for changes in available display devices.
DisplayManagerCompat	Helper for accessing features in `DisplayManager` introduced after API level 4 in a backwards compatible fashion.
DisplayMetrics	A structure describing general information about a display, such as its size, density, and font scaling.
Document	The `Document` interface represents the entire HTML or XML document.
DocumentBuilder	Defines the API to obtain DOM Document instances from an XML document.
DocumentBuilderFactory	Defines a factory API that enables applications to obtain a parser that produces DOM object trees from XML documents.
Documented	Defines a meta-annotation for indicating that an annotation is documented and considered part of the public API.
DocumentFragment	`DocumentFragment` is a "lightweight" or "minimal" `Document` object.
DocumentHandler	This interface was deprecated in API level 1. This interface has been replaced by the SAX2 `ContentHandler` interface, which includes Namespace support.
DocumentsContract	Defines the contract between a documents provider and the platform.
DocumentsContract.Document	Constants related to a document, including `Cursor` column names and flags.
DocumentsContract.Root	Constants related to a root of documents, including `Cursor` column names and flags.
DocumentsProvider	Base class for a document provider.
DocumentType	Each `Document` has a `doctype` attribute whose value is either `null` or a `DocumentType` object.
DomainCombiner	Legacy security code; do not use.
DOMConfiguration	The `DOMConfiguration` interface represents the configuration of a document and maintains a table of recognized parameters.
DOMError	`DOMError` is an interface that describes an error.
DOMErrorHandler	`DOMErrorHandler` is a callback interface that the DOM implementation can call when reporting errors that happens while processing XML data, or when doing some other processing (e.g.
DOMException	DOM operations only raise exceptions in "exceptional" circumstances, i.e., when an operation is impossible to perform (either for logical reasons, because data is lost, or because the implementation has become unstable).
DOMImplementation	The `DOMImplementation` interface provides a number of methods for performing operations that are independent of any particular instance of the document object model.
DOMImplementationList	The `DOMImplementationList` interface provides the abstraction of an ordered collection of DOM implementations, without defining or constraining how this collection is implemented.
DOMImplementationLS	`DOMImplementationLS` contains the factory methods for creating Load and Save objects.
DOMImplementationSource	This interface permits a DOM implementer to supply one or more implementations, based upon requested features and versions, as specified in .
DOMLocator	Indicates the position of a node in a source DOM, intended primarily for error reporting.
DOMLocator	`DOMLocator` is an interface that describes a location (e.g.
DOMResult	Acts as a holder for a transformation result tree in the form of a Document Object Model (DOM) tree.
DOMSource	Acts as a holder for a transformation Source tree in the form of a Document Object Model (DOM) tree.
DOMStringList	The `DOMStringList` interface provides the abstraction of an ordered collection of `DOMString` values, without defining or constraining how this collection is implemented.
DonutScrollerCompatTest
Double	The wrapper for the primitive type `double` .
Double2	Vector version of the basic double type.
Double2	Class for exposing the native RenderScript double2 type back to the Android system.
Double3	Vector version of the basic double type.
Double3	Class for exposing the native RenderScript double3 type back to the Android system.
Double4	Vector version of the basic double type.
Double4	Class for exposing the native RenderScript double4 type back to the Android system.
DoubleBuffer	A buffer of doubles.
DownloadListener
DownloadManager	The download manager is a system service that handles long-running HTTP downloads.
DownloadManager.Query	This class may be used to filter download manager queries.
DownloadManager.Request	This class contains all the information necessary to request a new download.
DragEvent	Represents an event that is sent out by the system at various times during a drag and drop operation.
Drawable	A Drawable is a general abstraction for "something that can be drawn." Most often you will deal with Drawable as the type of resource retrieved for drawing things to the screen; the Drawable class provides a generic API for dealing with an underlying visual resource that may take a variety of forms.
Drawable.Callback	Implement this interface if you want to create an animated drawable that extends `Drawable` .
Drawable.ConstantState	This abstract class is used by `Drawable` s to store shared constant state and data between Drawables.
DrawableCompat	Helper for accessing features in `Drawable` introduced after API level 4 in a backwards compatible fashion.
DrawableContainer	A helper class that contains several `Drawable` s and selects which one to use.
DrawableContainer.DrawableContainerState	A ConstantState that can contain several `Drawable` s.
DrawableMarginSpan
DrawableRes	Denotes that an integer parameter, field or method return value is expected to be a drawable resource reference (e.g.
DrawerLayout	DrawerLayout acts as a top-level container for window content that allows for interactive "drawer" views to be pulled out from the edge of the window.
DrawerLayout.DrawerListener	Listener for monitoring events about drawers.
DrawerLayout.LayoutParams
DrawerLayout.SavedState	State persisted across instances
DrawerLayout.SimpleDrawerListener	Stub/no-op implementations of all methods of `DrawerLayout.DrawerListener` .
DrawFilter	A DrawFilter subclass can be installed in a Canvas.
DreamService	Extend this class to implement a custom dream (available to the user as a "Daydream").
Driver	An interface to a JDBC driver.
Driver	SAX2 Driver that pulls events from XmlPullParser and comverts them into SAX2 callbacks.
DriverManager	Provides facilities for managing JDBC drivers.
DriverPropertyInfo	A class holding information about driver properties of a database connection.
DrmConvertedStatus	An entity class that wraps converted data, conversion status, and the offset for appending the header and body signature to the converted data.
DrmErrorEvent	An entity class that is passed to the `onError()` callback.
DrmEvent	A base class that is used to send asynchronous event information from the DRM framework.
DrmInfo	An entity class that describes the information required to send transactions between a device and an online DRM server.
DrmInfoEvent	An entity class that is passed to the `onInfo()` callback.
DrmInfoRequest	An entity class that is used to pass information to an online DRM server.
DrmInfoStatus	An entity class that wraps the result of communication between a device and an online DRM server.
DrmManagerClient	The main programming interface for the DRM framework.
DrmManagerClient.OnErrorListener	Interface definition for a callback that receives information about DRM framework errors.
DrmManagerClient.OnEventListener	Interface definition for a callback that receives information about DRM processing events.
DrmManagerClient.OnInfoListener	Interface definition for a callback that receives status messages and warnings during registration and rights acquisition.
DrmRights	An entity class that wraps the license information retrieved from the online DRM server.
DrmStore	Defines constants that are used by the DRM framework.
DrmStore.Action	Defines actions that can be performed on rights-protected content.
DrmStore.ConstraintsColumns	Interface definition for the columns that represent DRM constraints.
DrmStore.DrmObjectType	Defines DRM object types.
DrmStore.Playback	Defines playback states for content.
DrmStore.RightsStatus	Defines status notifications for digital rights.
DrmSupportInfo	An entity class that wraps the capability of each DRM plug-in (agent), such as the MIME type and file suffix the DRM plug-in can handle.
DrmUtils	A utility class that provides operations for parsing extended metadata embedded in DRM constraint information.
DrmUtils.ExtendedMetadataParser	Utility that parses extended metadata embedded in DRM constraint information.
DropBoxManager	Enqueues chunks of data (from various sources -- application crashes, kernel log records, etc.).
DropBoxManager.Entry	A single entry retrieved from the drop box.
DSAKey	The base interface for Digital Signature Algorithm (DSA) public or private keys.
DSAKeyPairGenerator	The interface for key generators that can generate DSA key pairs.
DSAParameterSpec	The parameter specification used with the Digital Signature Algorithm (DSA).
DSAParams	The interface for Digital Signature Algorithm (DSA) specific parameters.
DSAPrivateKey	The interface for a Digital Signature Algorithm (DSA) private key.
DSAPrivateKeySpec	The parameters specifying a DSA private key.
DSAPublicKey	The interface for a Digital Signature Algorithm (DSA) public key.
DSAPublicKeySpec	The parameters specifying a DSA public key.
DTDHandler	Receive notification of basic DTD-related events.
DuplicateFormatFlagsException	The unchecked exception will be thrown out if there are duplicate flags given out in the format specifier.
Duration	Immutable representation of a time span as defined in the W3C XML Schema 1.0 specification.
DynamicDrawableSpan
DynamicLayout	DynamicLayout is a text layout that updates itself as the text is edited.

E

EasyEditSpan	Provides an easy way to edit a portion of text.
ECField	The base interface for a Finite Field of an Elliptic Curve.
ECFieldF2m	The parameters specifying a characteristic 2 finite field of an elliptic curve.
ECFieldFp	The parameters specifying a prime finite field of an elliptic curve.
ECGenParameterSpec	The parameter specification used to generate elliptic curve domain parameters.
ECKey	The base interface for Elliptic Curve (EC) public or private keys.
ECParameterSpec	The parameter specification used with Elliptic Curve Cryptography (ECC).
ECPoint	A Point on an Elliptic Curve in barycentric (or affine) coordinates.
ECPrivateKey	The interface for an Elliptic Curve (EC) private key.
ECPrivateKeySpec	The parameters specifying an Elliptic Curve (EC) private key.
ECPublicKey	The interface for an Elliptic Curve (EC) public key.
ECPublicKeySpec	The parameters specifying an Elliptic Curve (EC) public key.
EdgeEffect	This class performs the graphical effect used at the edges of scrollable widgets when the user scrolls beyond the content bounds in 2D space.
EdgeEffectCompat	Helper for accessing `EdgeEffect` introduced after API level 4 in a backwards compatible fashion.
Editable	This is the interface for text whose content and markup can be changed (as opposed to immutable text like Strings).
Editable.Factory	Factory used by TextView to create new Editables.
EditorInfo	An EditorInfo describes several attributes of a text editing object that an input method is communicating with (typically an EditText), most importantly the type of text content it contains.
EditText	EditText is a thin veneer over TextView that configures itself to be editable.
EditTextPreference	A `Preference` that allows for string input.
Effect	Effects are high-performance transformations that can be applied to image frames.
EffectContext	An EffectContext keeps all necessary state information to run Effects within a Open GL ES 2.0 context.
EffectFactory	The EffectFactory class defines the list of available Effects, and provides functionality to inspect and instantiate them.
EffectUpdateListener	Some effects may issue callbacks to inform the host of changes to the effect state.
EGL
EGL10
EGL11
EGL14	EGL 1.4
EGLConfig	Wrapper class for native EGLConfig objects.
EGLConfig
EGLContext	Wrapper class for native EGLContext objects.
EGLContext
EGLDisplay	Wrapper class for native EGLDisplay objects.
EGLDisplay
EGLExt	EGL Extensions
EGLObjectHandle	Base class for wrapped EGL objects.
EGLSurface	Wrapper class for native EGLSurface objects.
EGLSurface
Element	An Element represents one item within an `Allocation` .
Element	An XML element.
Element	An Element represents one item within an `Allocation` .
Element	The `Element` interface represents an element in an HTML or XML document.
Element.Builder	Builder class for producing complex elements with matching field and name pairs.
Element.Builder	Builder class for producing complex elements with matching field and name pairs.
Element.DataKind	The special interpretation of the data if required.
Element.DataKind	The special interpretation of the data if required.
Element.DataType	DataType represents the basic type information for a basic element.
Element.DataType	DataType represents the basic type information for a basic element.
ElementListener	Listens for the beginning and ending of elements.
ElementType	Defines an enumeration for Java program elements.
EllipticCurve	An Elliptic Curve with its necessary values.
EmbossMaskFilter
EmptyStackException	An `EmptyStackException` is thrown if the pop/peek method of a stack is executed on an empty stack.
EncodedKeySpec	The abstract key specification for a public or a private key in encoded format.
EncodingUtils	The home for utility methods that handle various encoding tasks.
EncryptedPrivateKeyInfo	This class implements the `EncryptedPrivateKeyInfo` ASN.1 type as specified in PKCS #8 - Private-Key Information Syntax Standard .
EndElementListener	Listens for the end of elements.
EndTextElementListener	Listens for the end of text elements.
EnglishReasonPhraseCatalog	English reason phrases for HTTP status codes.
Entity	A representation of a item using ContentValues.
Entity	This interface represents a known entity, either parsed or unparsed, in an XML document.
Entity.NamedContentValues
EntityDeserializer	Default implementation of an entity deserializer.
EntityEnclosingRequestWrapper	A wrapper class for `HttpEntityEnclosingRequest` s that can be used to change properties of the current request without modifying the original object.
EntityIterator	A specialization of `Iterator` that allows iterating over a collection of `Entity` objects.
EntityReference	`EntityReference` nodes may be used to represent an entity reference in the tree.
EntityResolver	Basic interface for resolving entities.
EntityResolver2	Extended interface for mapping external entity references to input sources, or providing a missing external subset.
EntitySerializer	Default implementation of an entity serializer.
EntityTemplate	Entity that delegates the process of content generation to an abstract content producer.
EntityUtils	Static helpers for dealing with `entities` .
Enum <E extends Enum <E>>	The superclass of all enumerated types.
EnumConstantNotPresentException	Thrown if an `enum` constant does not exist for a particular name.
Enumeration <E>	A legacy iteration interface.
EnumMap <K extends Enum <K>, V>	An `Map` specialized for use with `Enum` types as keys.
EnumSet <E extends Enum <E>>	An EnumSet is a specialized Set to be used with enums as keys.
Environment	Provides access to environment variables.
EnvironmentalReverb	A sound generated within a room travels in many directions.
EnvironmentalReverb.OnParameterChangeListener	The OnParameterChangeListener interface defines a method called by the EnvironmentalReverb when a parameter value has changed.
EnvironmentalReverb.Settings	The Settings class regroups all environmental reverb parameters.
EnvironmentCompat	Helper for accessing features in `Environment` introduced after API level 4 in a backwards compatible fashion.
EOFException	Thrown when a program encounters the end of a file or stream during an input operation.
EofSensorInputStream	A stream wrapper that triggers actions on `close()` and EOF.
EofSensorWatcher	A watcher for `EofSensorInputStream` .
Equalizer	An Equalizer is used to alter the frequency response of a particular music source or of the main output mix.
Equalizer.OnParameterChangeListener	The OnParameterChangeListener interface defines a method called by the Equalizer when a parameter value has changed.
Equalizer.Settings	The Settings class regroups all equalizer parameters.
Error	`Error` is the superclass of all classes that represent unrecoverable errors.
ErrorHandler	Basic interface for SAX error handlers.
ErrorListener	To provide customized error handling, implement this interface and use the `setErrorListener` method to register an instance of the implementation with the `Transformer` .
ErrorManager	An error reporting facility for `Handler` implementations to record any error that may happen during logging.
ETC1	Methods for encoding and decoding ETC1 textures.
ETC1Util	Utility methods for using ETC1 compressed textures.
ETC1Util.ETC1Texture	A utility class encapsulating a compressed ETC1 texture.
EventListener	EventListener is the superclass of all event listener interfaces.
EventListenerProxy	This abstract class provides a simple wrapper for objects of type `EventListener` .
EventLog	Access to the system diagnostic event record.
EventLog.Event	A previously logged event read from the logs.
EventLogTags	This class was deprecated in API level 8. This class is no longer functional. Use `EventLog` instead.
EventLogTags.Description
EventObject	`EventObject` s represent events.
Exception	`Exception` is the superclass of all classes that represent recoverable exceptions.
ExceptionInInitializerError	Thrown when an exception occurs during class initialization.
ExceptionUtils	The home for utility methods that handle various exception-related tasks.
Exchanger <V>	A synchronization point at which threads can pair and swap elements within pairs.
ExecutionContext	`Context` attribute names for protocol execution.
ExecutionException	Exception thrown when attempting to retrieve the result of a task that aborted by throwing an exception.
Executor	An object that executes submitted `Runnable` tasks.
ExecutorCompletionService <V>	A `CompletionService` that uses a supplied `Executor` to execute tasks.
Executors	Factory and utility methods for `Executor` , `ExecutorService` , `ScheduledExecutorService` , `ThreadFactory` , and `Callable` classes defined in this package.
ExecutorService	An `Executor` that provides methods to manage termination and methods that can produce a `Future` for tracking progress of one or more asynchronous tasks.
ExemptionMechanism	This class implements the functionality of an exemption mechanism such as key recovery , key weakening , or key escrow .
ExemptionMechanismException	This is the base class for `ExemptionMechanismException` .
ExemptionMechanismSpi	The Service Provider Interface ( SPI ) definition for the `ExemptionMechanism` class.
ExifInterface	This is a class for reading and writing Exif tags in a JPEG file.
ExpandableListActivity	An activity that displays an expandable list of items by binding to a data source implementing the ExpandableListAdapter, and exposes event handlers when the user selects an item.
ExpandableListAdapter	An adapter that links a `ExpandableListView` with the underlying data.
ExpandableListView	A view that shows items in a vertically scrolling two-level list.
ExpandableListView.ExpandableListContextMenuInfo	Extra menu information specific to an `ExpandableListView` provided to the `onCreateContextMenu(ContextMenu, View, ContextMenuInfo)` callback when a context menu is brought up for this AdapterView.
ExpandableListView.OnChildClickListener	Interface definition for a callback to be invoked when a child in this expandable list has been clicked.
ExpandableListView.OnGroupClickListener	Interface definition for a callback to be invoked when a group in this expandable list has been clicked.
ExpandableListView.OnGroupCollapseListener	Used for being notified when a group is collapsed
ExpandableListView.OnGroupExpandListener	Used for being notified when a group is expanded
ExploreByTouchHelper	ExploreByTouchHelper is a utility class for implementing accessibility support in custom `View` s that represent a collection of View-like logical items.
Externalizable	Defines an interface for classes that want to be serializable, but have their own binary representation.
ExtractEditText	Specialization of `EditText` for showing and interacting with the extracted text in a full-screen input method.
ExtractedText	Information about text that has been extracted for use by an input method.
ExtractedTextRequest	Description of what an input method would like from an application when extract text from its input editor.

F

FaceDetector	Identifies the faces of people in a `Bitmap` graphic object.
FaceDetector.Face	A Face contains all the information identifying the location of a face in a bitmap.
FactoryConfigurationError	Thrown when a problem with configuration with the Parser Factories exists.
Fade	This transition tracks changes to the visibility of target views in the start and end scenes and fades views in or out when they become visible or non-visible.
FeatureInfo	A single feature that can be requested by an application.
Field	This class represents a field.
FieldPacker	Utility class for packing arguments and structures from Android system objects to RenderScript objects.
FieldPacker	Utility class for packing arguments and structures from Android system objects to RenderScript objects.
FieldPosition	Identifies fields in formatted strings.
File	An "abstract" representation of a file system entity identified by a pathname.
FileBackupHelper	A helper class that can be used in conjunction with `BackupAgentHelper` to manage the backup of a set of files.
FileChannel	An abstract channel type for interaction with a platform file.
FileChannel.MapMode	`MapMode` defines file mapping mode constants.
FileDescriptor	Wraps a Unix file descriptor.
FileEntity	An entity whose content is retrieved from a file.
FileFilter	An interface for filtering `File` objects based on their names or other information.
FileHandler	A `FileHandler` writes logging records into a specified file or a rotating set of files.
FileInputStream	An input stream that reads bytes from a file.
FileLock	A `FileLock` represents a locked region of a file.
FileLockInterruptionException	A `FileLockInterruptionException` is thrown when a thread is interrupted while waiting to acquire a file lock.
FilenameFilter	An interface for filtering `File` objects based on their names or the directory they reside in.
FileNameMap	Defines a scheme for mapping a filename type to a MIME content type.
FileNotFoundException	Thrown when a file specified by a program cannot be found.
FileObserver	Monitors files (using inotify ) to fire an event after files are accessed or changed by by any process on the device (including this one).
FileOutputStream	An output stream that writes bytes to a file.
FilePermission	Legacy security code; do not use.
FileProvider	FileProvider is a special subclass of `ContentProvider` that facilitates secure sharing of files associated with an app by creating a `content://` `Uri` for a file instead of a `file:///` `Uri` .
FileReader	A specialized `Reader` that reads from a file in the file system.
FileWriter	A specialized `Writer` that writes to a file in the file system.
Filter	A filter constrains data with a filtering pattern.
Filter	A `Filter` provides a mechanism for exercising fine-grained control over which records get logged.
Filter.FilterListener	Listener used to receive a notification upon completion of a filtering operation.
Filter.FilterResults	Holds the results of a filtering operation.
Filterable	Defines a filterable behavior.
FilterInputStream	Wraps an existing `InputStream` and performs some transformation on the input data while it is being read.
FilterOutputStream	Wraps an existing `OutputStream` and performs some transformation on the output data while it is being written.
FilterQueryProvider	This class can be used by external clients of CursorAdapter and CursorTreeAdapter to define how the content of the adapter should be filtered.
FilterReader	Wraps an existing `Reader` and performs some transformation on the input data while it is being read.
FilterWriter	Wraps an existing `Writer` and performs some transformation on the output data while it is being written.
FlakyTest	This annotation can be used on an `InstrumentationTestCase` 's test methods.
Float	The wrapper for the primitive type `float` .
Float2	Vector version of the basic float type.
Float2	Class for exposing the native RenderScript float2 type back to the Android system.
Float3	Vector version of the basic float type.
Float3	Class for exposing the native RenderScript float2 type back to the Android system.
Float4	Vector version of the basic float type.
Float4	Class for exposing the native RenderScript float2 type back to the Android system.
FloatBuffer	A buffer of floats.
FloatEvaluator	This evaluator can be used to perform type interpolation between `float` values.
FloatMath	Math routines similar to those found in `Math` .
Flushable	Defines an interface for classes that can (or need to) be flushed, typically before some output processing is considered to be finished and the object gets closed.
FocusFinder	The algorithm used for finding the next focusable view in a given direction from a view that currently has focus.
ForegroundColorSpan
Format	The base class for all formats.
Format.Field	Inner class used to represent `Format` attributes in the `AttributedCharacterIterator` that the `formatToCharacterIterator()` method returns in `Format` subclasses.
FormatException
FormatFlagsConversionMismatchException	A `FormatFlagsConversionMismatchException` will be thrown if a conversion and the flags are incompatible.
Formattable	Classes that handle custom formatting for the 's' specifier of `Formatter` should implement the `Formattable` interface.
FormattableFlags	FormattableFlags are used as a parameter to `formatTo(Formatter, int, int, int)` and change the output format in `Formattable` s.
FormattedHeader	An HTTP header which is already formatted.
Formatter	Utility class to aid in formatting common values that are not covered by the `Formatter` class in `java.util`
Formatter	Formats arguments according to a format string (like `printf` in C).
Formatter	`Formatter` objects are used to format `LogRecord` objects into a string representation.
Formatter.BigDecimalLayoutForm	The enumeration giving the available styles for formatting very large decimal numbers.
FormatterClosedException	A `FormatterClosedException` will be thrown if the formatter has been closed.
FractionRes	Denotes that an integer parameter, field or method return value is expected to be a fraction resource reference.
Fragment	A Fragment is a piece of an application's user interface or behavior that can be placed in an `Activity` .
Fragment	Static library support version of the framework's `Fragment` .
Fragment.InstantiationException	Thrown by `instantiate(Context, String, Bundle)` when there is an instantiation failure.
Fragment.InstantiationException	Thrown by `instantiate(Context, String, Bundle)` when there is an instantiation failure.
Fragment.SavedState	State information that has been retrieved from a fragment instance through `FragmentManager.saveFragmentInstanceState` .
Fragment.SavedState	State information that has been retrieved from a fragment instance through `FragmentManager.saveFragmentInstanceState` .
FragmentActivity	Base class for activities that want to use the support-based `Fragment` and `Loader` APIs.
FragmentBreadCrumbs	Helper class for showing "bread crumbs" representing the fragment stack in an activity.
FragmentBreadCrumbs.OnBreadCrumbClickListener	Interface to intercept clicks on the bread crumbs.
FragmentCompat	Helper for accessing features in `Fragment` introduced after API level 13 in a backwards compatible fashion.
FragmentManager	Interface for interacting with `Fragment` objects inside of an `Activity` Developer Guides For more information about using fragments, read the Fragments developer guide.
FragmentManager	Static library support version of the framework's `FragmentManager` .
FragmentManager.BackStackEntry	Representation of an entry on the fragment back stack, as created with `FragmentTransaction.addToBackStack()` .
FragmentManager.BackStackEntry	Representation of an entry on the fragment back stack, as created with `FragmentTransaction.addToBackStack()` .
FragmentManager.OnBackStackChangedListener	Interface to watch for changes to the back stack.
FragmentManager.OnBackStackChangedListener	Interface to watch for changes to the back stack.
FragmentPagerAdapter	Implementation of `PagerAdapter` that represents each page as a `Fragment` that is persistently kept in the fragment manager as long as the user can return to the page.
FragmentPagerAdapter	Implementation of `PagerAdapter` that represents each page as a `Fragment` that is persistently kept in the fragment manager as long as the user can return to the page.
FragmentStatePagerAdapter	Implementation of `PagerAdapter` that uses a `Fragment` to manage each page.
FragmentStatePagerAdapter	Implementation of `PagerAdapter` that uses a `Fragment` to manage each page.
FragmentTabHost	Version of `FragmentTabHost` that can be used with the platform `Fragment` APIs.
FragmentTabHost	Special TabHost that allows the use of `Fragment` objects for its tab content.
FragmentTransaction	API for performing a set of Fragment operations.
FragmentTransaction	Static library support version of the framework's `FragmentTransaction` .
FrameLayout	FrameLayout is designed to block out an area on the screen to display a single item.
FrameLayout.LayoutParams	Per-child layout information for layouts that support margins.
FullBackupDataOutput	Provides the interface through which a `BackupAgent` writes entire files to a full backup data set, via its `onFullBackup(FullBackupDataOutput)` method.
Future <V>	A `Future` represents the result of an asynchronous computation.
FutureTask <V>	A cancellable asynchronous computation.

G

Gallery	This class was deprecated in API level 16. This widget is no longer supported. Other horizontally scrolling widgets include `HorizontalScrollView` and `ViewPager` from the support library.
Gallery.LayoutParams	Gallery extends LayoutParams to provide a place to hold current Transformation information along with previous position/transformation info.
GatheringByteChannel	The interface for channels that can write a set of buffers in a single operation.
GCMParameterSpec	Provides a the parameters for an instance of a `Cipher` using Galois/Counter Mode (GCM).
GeneralSecurityException	`GeneralSecurityException` is a general security exception and the superclass for all security specific exceptions.
GenericArrayType	This interface represents an array type with a component type that is either a parameterized type or a type variable.
GenericDeclaration	Common interface for language constructs that declare type parameters.
GenericSignatureFormatError	Indicates that a malformed signature has been encountered via a reflective method.
Geocoder	A class for handling geocoding and reverse geocoding.
GeofenceHardware	This class handles geofences managed by various hardware subsystems.
GeofenceHardwareCallback	The callback class associated with the APIs in `GeofenceHardware`
GeofenceHardwareMonitorCallback	The callback class associated with the status change of hardware montiors in `GeofenceHardware`
GeofenceHardwareRequest	This class represents the characteristics of the geofence.
GeolocationPermissions	This class is used to manage permissions for the WebView's Geolocation JavaScript API.
GeolocationPermissions.Callback	A callback interface used by the host application to set the Geolocation permission state for an origin.
GeomagneticField	Estimates magnetic field at a given point on Earth, and in particular, to compute the magnetic declination from true north.
Gesture	A gesture is a hand-drawn shape on a touch screen.
GestureDetector	Detects various gestures and events using the supplied `MotionEvent` s.
GestureDetector.OnDoubleTapListener	The listener that is used to notify when a double-tap or a confirmed single-tap occur.
GestureDetector.OnGestureListener	The listener that is used to notify when gestures occur.
GestureDetector.SimpleOnGestureListener	A convenience class to extend when you only want to listen for a subset of all the gestures.
GestureDetectorCompat	Detects various gestures and events using the supplied `MotionEvent` s.
GestureLibraries
GestureLibrary
GestureOverlayView	A transparent overlay for gesture input that can be placed on top of other widgets or contain other widgets.
GestureOverlayView.OnGestureListener
GestureOverlayView.OnGesturePerformedListener
GestureOverlayView.OnGesturingListener
GesturePoint	A timed point of a gesture stroke.
GestureStore	GestureLibrary maintains gesture examples and makes predictions on a new gesture
GestureStroke	A gesture stroke started on a touch down and ended on a touch up.
GestureUtils	Utility functions for gesture processing & analysis, including methods for: feature extraction (e.g., samplers and those for calculating bounding boxes and gesture path lengths); geometric transformation (e.g., translation, rotation and scaling); gesture similarity comparison (e.g., calculating Euclidean or Cosine distances between two gestures).
GetChars	Please implement this interface if your CharSequence has a getChars() method like the one in String that is faster than calling charAt() multiple times.
GingerbreadScrollerCompatTest
GL
GL10
GL10Ext
GL11
GL11Ext
GL11ExtensionPack
GLDebugHelper	A helper class for debugging OpenGL ES applications.
GLES10
GLES10Ext
GLES11
GLES11Ext
GLES20	OpenGL ES 2.0
GLES30	OpenGL ES 3.0
GLException	An exception class for OpenGL errors.
GLSurfaceView	An implementation of SurfaceView that uses the dedicated surface for displaying OpenGL rendering.
GLSurfaceView.EGLConfigChooser	An interface for choosing an EGLConfig configuration from a list of potential configurations.
GLSurfaceView.EGLContextFactory	An interface for customizing the eglCreateContext and eglDestroyContext calls.
GLSurfaceView.EGLWindowSurfaceFactory	An interface for customizing the eglCreateWindowSurface and eglDestroySurface calls.
GLSurfaceView.GLWrapper	An interface used to wrap a GL interface.
GLSurfaceView.Renderer	A generic renderer interface.
GLU	A set of GL utilities inspired by the OpenGL Utility Toolkit.
GLUtils	Utility class to help bridging OpenGL ES and Android APIs.
GpsSatellite	This class represents the current state of a GPS satellite.
GpsStatus	This class represents the current state of the GPS engine.
GpsStatus.Listener	Used for receiving notifications when GPS status has changed.
GpsStatus.NmeaListener	Used for receiving NMEA sentences from the GPS.
GradientDrawable	A Drawable with a color gradient for buttons, backgrounds, etc.
GradientDrawable.Orientation	Controls how the gradient is oriented relative to the drawable's bounds
Gravity	Standard constants and tools for placing an object within a potentially larger container.
GravityCompat	Compatibility shim for accessing newer functionality from `Gravity` .
GregorianCalendar	`GregorianCalendar` is a concrete subclass of `Calendar` and provides the standard calendar used by most of the world.
GridLayout	A layout that places its children in a rectangular grid .
GridLayout	A layout that places its children in a rectangular grid .
GridLayout.Alignment	Alignments specify where a view should be placed within a cell group and what size it should be.
GridLayout.Alignment	Alignments specify where a view should be placed within a cell group and what size it should be.
GridLayout.LayoutParams	Layout information associated with each of the children of a GridLayout.
GridLayout.LayoutParams	Layout information associated with each of the children of a GridLayout.
GridLayout.Spec	A Spec defines the horizontal or vertical characteristics of a group of cells.
GridLayout.Spec	A Spec defines the horizontal or vertical characteristics of a group of cells.
GridLayoutAnimationController	A layout animation controller is used to animated a grid layout's children.
GridLayoutAnimationController.AnimationParameters	The set of parameters that has to be attached to each view contained in the view group animated by the grid layout animation controller.
GridView	A view that shows items in two-dimensional scrolling grid.
Group	A `Principal` that represents a group of principals.
GsmCellLocation	Represents the cell location on a GSM phone.
Guard	`Guard` implementors protect access to other objects.
GuardedObject	`GuardedObject` controls access to an object, by checking all requests for the object with a `Guard` .
GZIPInputStream	The `GZIPInputStream` class is used to read data stored in the GZIP format, reading and decompressing GZIP data from the underlying stream into its buffer.
GZIPOutputStream	The `GZIPOutputStream` class is used to write data to a stream in the GZIP storage format.

H

Handler	A Handler allows you to send and process `Message` and Runnable objects associated with a thread's `MessageQueue` .
Handler	A `Handler` object accepts a logging request and exports the desired messages to a target, for example, a file, the console, etc.
Handler.Callback	Callback interface you can use when instantiating a Handler to avoid having to implement your own subclass of Handler.
HandlerBase	This class was deprecated in API level 1. This class works with the deprecated `DocumentHandler` interface. It has been replaced by the SAX2 `DefaultHandler` class.
HandlerThread	Handy class for starting a new thread that has a looper.
HandshakeCompletedEvent	The event object encapsulating the information about a completed SSL handshake on a SSL connection.
HandshakeCompletedListener	The listener to be implemented to receive event notifications on completion of SSL handshake on an SSL connection.
HapticFeedbackConstants	Constants to be used to perform haptic feedback effects via `performHapticFeedback(int)`
HashMap <K, V>	HashMap is an implementation of `Map` .
HashSet <E>	HashSet is an implementation of a Set.
Hashtable <K, V>	Hashtable is a synchronized implementation of `Map` .
Header	Represents an HTTP header field.
HeaderElement	One element of an HTTP `header` value.
HeaderElementIterator	A type-safe iterator for `HeaderElement` objects.
HeaderGroup	A class for combining a set of headers.
HeaderIterator	A type-safe iterator for `Header` objects.
HeaderValueFormatter	Interface for formatting elements of a header value.
HeaderValueParser	Interface for parsing header values into elements.
HeaderViewListAdapter	ListAdapter used when a ListView has header views.
HeterogeneousExpandableList	Additional methods that when implemented make an `ExpandableListAdapter` take advantage of the `Adapter` view type mechanism.
HideReturnsTransformationMethod	This transformation method causes any carriage return characters (\r) to be hidden by displaying them as zero-width non-breaking space characters ().
HorizontalScrollView	Layout container for a view hierarchy that can be scrolled by the user, allowing it to be larger than the physical display.
HostApduService	HostApduService is a convenience `Service` class that can be extended to emulate an NFC card inside an Android service component.
HostNameResolver
HostnameVerifier	The interface to be used to provide hostname verification functionality.
Html	This class processes HTML strings into displayable styled text.
Html.ImageGetter	Retrieves images for HTML <img> tags.
Html.TagHandler	Is notified when HTML tags are encountered that the parser does not know how to interpret.
HTTP	Constants and static helpers related to the HTTP protocol.
HttpAbstractParamBean
HttpAuthHandler	Represents a request for HTTP authentication.
HttpClient	Interface for an HTTP client.
HttpClientConnection	An HTTP connection for use on the client side.
HttpClientParams	An adaptor for accessing HTTP client parameters in `HttpParams` .
HttpConnection	A generic HTTP connection, useful on client and server side.
HttpConnectionMetrics	The point of access to the statistics of an `HttpConnection` .
HttpConnectionMetricsImpl	Implementation of the metrics interface.
HttpConnectionParamBean
HttpConnectionParams	An adaptor for accessing connection parameters in `HttpParams` .
HttpContext	A context for executing a request.
HttpCookie	An opaque key-value value pair held by an HTTP client to permit a stateful session with an HTTP server.
HttpDateGenerator	Generates a date in the format required by the HTTP protocol.
HttpDelete	HTTP DELETE method The HTTP DELETE method is defined in section 9.7 of RFC2616 : The DELETE method requests that the origin server delete the resource identified by the Request-URI.
HttpEntity	An entity that can be sent or received with an HTTP message.
HttpEntityEnclosingRequest	A request with an entity.
HttpEntityEnclosingRequestBase	Basic implementation of an HTTP request that can be modified.
HttpEntityWrapper	Base class for wrapping entities.
HttpException	Signals that an HTTP exception has occurred.
HttpExpectationVerifier	Defines an interface to verify whether an incoming HTTP request meets the target server's expectations.
HttpGet	HTTP GET method.
HttpHead	HTTP HEAD method.
HttpHost	Holds all of the variables needed to describe an HTTP connection to a host.
HttpHostConnectException	A `ConnectException` that specifies the `HttpHost` that was being connected to.
HttpInetConnection	An HTTP connection over the Internet Protocol (IP).
HttpMessage	A generic HTTP message.
HttpMessageParser	Generic message parser interface.
HttpMessageWriter	Generic message writer interface.
HttpOptions	HTTP OPTIONS method.
HttpParams	Represents a collection of HTTP protocol and framework parameters.
HttpPost	HTTP POST method.
HttpProcessor	Performs interceptor processing of requests and responses.
HttpProtocolParamBean
HttpProtocolParams	This class implements an adaptor around the `HttpParams` interface to simplify manipulation of the HTTP protocol specific parameters.
HttpPut	HTTP PUT method.
HttpRequest	An HTTP request.
HttpRequestBase	Basic implementation of an HTTP request that can be modified.
HttpRequestExecutor	Sends HTTP requests and receives the responses.
HttpRequestFactory	A factory for `HttpRequest` objects.
HttpRequestHandler
HttpRequestHandlerRegistry	Maintains a map of HTTP request handlers keyed by a request URI pattern.
HttpRequestHandlerResolver	Interface to be implemented by objects that can resolve `HttpRequestHandler` instances by request URI.
HttpRequestInterceptor	Processes a request.
HttpRequestInterceptorList	Provides access to an ordered list of request interceptors.
HttpRequestParser
HttpRequestRetryHandler	A handler for determining if an HttpRequest should be retried after a recoverable exception during execution.
HttpRequestWriter
HttpResponse	An HTTP response.
HttpResponseCache	Caches HTTP and HTTPS responses to the filesystem so they may be reused, saving time and bandwidth.
HttpResponseException	Signals a non 2xx HTTP response.
HttpResponseFactory	A factory for `HttpResponse` objects.
HttpResponseInterceptor	Processes a response.
HttpResponseInterceptorList	Provides access to an ordered list of response interceptors.
HttpResponseParser
HttpResponseWriter
HttpRetryException	If a HTTP request has to be retried, this exception will be thrown if the request cannot be retried automatically.
HttpRoute	The route for a request.
HttpRouteDirector	Provides directions on establishing a route.
HttpRoutePlanner	Encapsulates logic to compute a `HttpRoute` to a target host.
HttpServerConnection	An HTTP connection for use on the server side.
HttpService	Minimalistic server-side implementation of an HTTP processor.
HttpStatus	Constants enumerating the HTTP status codes.
HttpsURLConnection	An `HttpURLConnection` for HTTPS ( RFC 2818 ).
HttpTrace	HTTP TRACE method.
HttpTransportMetrics
HttpTransportMetricsImpl	Default implementation of `HttpTransportMetrics` .
HttpUriRequest	Extended version of the `HttpRequest` interface that provides convenience methods to access request properties such as request URI and method type.
HttpURLConnection	An `URLConnection` for HTTP ( RFC 2616 ) used to send and receive data over the web.
HttpVersion	Represents an HTTP version, as specified in RFC 2616.

I

IBinder	Base interface for a remotable object, the core part of a lightweight remote procedure call mechanism designed for high performance when performing in-process and cross-process calls.
IBinder.DeathRecipient	Interface for receiving a callback when the process hosting an IBinder has gone away.
IconMarginSpan
IcsScrollerCompatTest
ICUCompat
Identity	This class was deprecated in API level 1. Use `Principal` , `KeyStore` and the `java.security.cert` package instead.
IdentityHashMap <K, V>	IdentityHashMap is a variant on HashMap which tests equality by reference instead of equality by value.
IdentityInputStream	A stream for reading from a `session input buffer` .
IdentityOutputStream	A stream for writing with an "identity" transport encoding.
IdentityScope	This class was deprecated in API level 1. Use `Principal` , `KeyStore` and the `java.security.cert` package instead.
IdleConnectionHandler	A helper class for connection managers to track idle connections.
IDN	Converts internationalized domain names between Unicode and the ASCII Compatible Encoding (ACE) representation.
IdRes	Denotes that an integer parameter, field or method return value is expected to be an id resource reference (e.g.
IInterface	Base class for Binder interfaces.
IllegalAccessError	Thrown when the VM notices that a program tries access a field which is not accessible from where it is referenced.
IllegalAccessException	Thrown when a program attempts to access a field or method which is not accessible from the location where the reference is made.
IllegalArgumentException	Thrown when a method is invoked with an argument which it can not reasonably deal with.
IllegalBlockingModeException	An `IllegalBlockingModeException` is thrown when an operation that requires a specific blocking mode is invoked on a channel that is in a different blocking mode.
IllegalBlockSizeException	The exception, that is thrown when the data length provided to a block cipher does not match the block size of the cipher.
IllegalCharsetNameException	An `IllegalCharsetNameException` is thrown when an illegal charset name is encountered.
IllegalFormatCodePointException	An `IllegalFormatCodePointException` will be thrown if an invalid Unicode code point (defined by `isValidCodePoint(int)` ) is passed as a parameter to a Formatter.
IllegalFormatConversionException	An `IllegalFormatConversionException` will be thrown when the parameter is incompatible with the corresponding format specifier.
IllegalFormatException	An `IllegalFormatException` is thrown when a format string that contains either an illegal syntax or format specifier is transferred as a parameter.
IllegalFormatFlagsException	An `IllegalFormatFlagsException` will be thrown if the combination of the format flags is illegal.
IllegalFormatPrecisionException	An `IllegalFormatPrecisionException` will be thrown if the precision is a negative other than -1 or in other cases where precision is not supported.
IllegalFormatWidthException	An `IllegalFormatWidthException` will be thrown if the width is a negative value other than -1 or in other cases where a width is not supported.
IllegalMonitorStateException	Thrown when a monitor operation is attempted when the monitor is not in the correct state, for example when a thread attempts to exit a monitor which it does not own.
IllegalSelectorException	An `IllegalSelectorException` is thrown when a call is made to register a channel on a selector that has been created by a different provider.
IllegalStateException	Thrown when an action is attempted at a time when the VM is not in the correct state.
IllegalThreadStateException	Thrown when an operation is attempted which is not possible given the state that the executing thread is in.
Image	A single complete image buffer to use with a media source such as a `MediaCodec` .
Image.Plane	A single color plane of image data.
ImageButton	Displays a button with an image (instead of text) that can be pressed or clicked by the user.
ImageFormat
ImageReader	The ImageReader class allows direct application access to image data rendered into a `Surface` Several Android media API classes accept Surface objects as targets to render to, including `MediaPlayer` , `MediaCodec` , and `RenderScript Allocations` .
ImageReader.OnImageAvailableListener	Callback interface for being notified that a new image is available.
ImageSpan
ImageSwitcher
ImageView	Displays an arbitrary image, such as an icon.
ImageView.ScaleType	Options for scaling the bounds of an image to the bounds of this view.
IncompatibleClassChangeError	`IncompatibleClassChangeError` is the superclass of all classes which represent errors that occur when inconsistent class files are loaded into the same running image.
IncompleteAnnotationException	Indicates that an element of an annotation type was accessed that was added after the type was compiled or serialized.
IndexedPropertyChangeEvent	A type of `PropertyChangeEvent` that indicates that an indexed property has changed.
IndexOutOfBoundsException	Thrown when a program attempts to access a value in an indexable collection using a value which is outside of the range of valid indices.
Inet4Address	An IPv4 address.
Inet6Address	An IPv6 address.
InetAddress	An Internet Protocol (IP) address.
InetAddressUtils	A collection of utilities relating to InetAddresses.
InetSocketAddress	This class represents a socket endpoint described by a IP address and a port number.
InflateException	This exception is thrown by an inflater on error conditions.
Inflater	This class decompresses data that was compressed using the DEFLATE algorithm (see specification ).
InflaterInputStream	This class provides an implementation of `FilterInputStream` that decompresses data that was compressed using the DEFLATE algorithm (see specification ).
InflaterOutputStream	An `OutputStream` filter to decompress data.
InheritableThreadLocal <T>	A thread-local variable whose value is passed from parent to child thread.
Inherited	Defines a meta-annotation for indicating that an annotation is automatically inherited.
InputBinding	Information given to an `InputMethod` about a client connecting to it.
InputConnection	The InputConnection interface is the communication channel from an `InputMethod` back to the application that is receiving its input.
InputConnectionWrapper	Wrapper class for proxying calls to another InputConnection.
InputDevice	Describes the capabilities of a particular input device.
InputDevice.MotionRange	Provides information about the range of values for a particular `MotionEvent` axis.
InputEvent	Common base class for input events.
InputFilter	InputFilters can be attached to `Editable` s to constrain the changes that can be made to them.
InputFilter.AllCaps	This filter will capitalize all the lower case letters that are added through edits.
InputFilter.LengthFilter	This filter will constrain edits not to make the length of the text greater than the specified length.
InputManager	Provides information about input devices and available key layouts.
InputManager.InputDeviceListener	Listens for changes in input devices.
InputMethod	The InputMethod interface represents an input method which can generate key events and text, such as digital, email addresses, CJK characters, other language characters, and etc., while handling various input events, and send the text back to the application that requests text input.
InputMethod.SessionCallback
InputMethodInfo	This class is used to specify meta information of an input method.
InputMethodManager	Central system API to the overall input method framework (IMF) architecture, which arbitrates interaction between applications and the current input method.
InputMethodService	InputMethodService provides a standard implementation of an InputMethod, which final implementations can derive from and customize.
InputMethodService.InputMethodImpl	Concrete implementation of `AbstractInputMethodService.AbstractInputMethodImpl` that provides all of the standard behavior for an input method.
InputMethodService.InputMethodSessionImpl	Concrete implementation of `AbstractInputMethodService.AbstractInputMethodSessionImpl` that provides all of the standard behavior for an input method session.
InputMethodService.Insets	Information about where interesting parts of the input method UI appear.
InputMethodSession	The InputMethodSession interface provides the per-client functionality of `InputMethod` that is safe to expose to applications.
InputMethodSession.EventCallback
InputMethodSubtype	This class is used to specify meta information of a subtype contained in an input method editor (IME).
InputMethodSubtype.InputMethodSubtypeBuilder	InputMethodSubtypeBuilder is a builder class of InputMethodSubtype.
InputMismatchException	An `InputMismatchException` is thrown by a scanner to indicate that the next token does not match or is out of range for the type specified in the pattern.
InputQueue	An input queue provides a mechanism for an application to receive incoming input events.
InputQueue.Callback	Interface to receive notification of when an InputQueue is associated and dissociated with a thread.
InputSource	A single input source for an XML entity.
InputStream	A readable source of bytes.
InputStreamEntity	A streamed entity obtaining content from an `InputStream` .
InputStreamReader	A class for turning a byte stream into a character stream.
InputType	Bit definitions for an integer defining the basic content type of text held in an `Editable` object.
InsetDrawable	A Drawable that insets another Drawable by a specified distance.
InstantiationError	Thrown when the VM notices that a program tries to create a new instance of a class which has no visible constructors from the location where `new` is invoked.
InstantiationException	Thrown when a program attempts to access a constructor which is not accessible from the location where the reference is made.
Instrumentation	Base class for implementing application instrumentation code.
Instrumentation.ActivityMonitor	Information about a particular kind of Intent that is being monitored.
Instrumentation.ActivityResult	Description of a Activity execution result to return to the original activity.
InstrumentationInfo	Information you can retrieve about a particular piece of test instrumentation.
InstrumentationTestCase	A test case that has access to `Instrumentation` .
InstrumentationTestRunner	An `Instrumentation` that runs various types of `TestCase` s against an Android package (application).
InstrumentationTestSuite	A `TestSuite` that injects `Instrumentation` into `InstrumentationTestCase` before running them.
Int2	Vector version of the basic int type.
Int2	Class for exposing the native RenderScript int2 type back to the Android system.
Int3	Vector version of the basic int type.
Int3	Class for exposing the native RenderScript int3 type back to the Android system.
Int4	Vector version of the basic int type.
Int4	Class for exposing the native RenderScript int4 type back to the Android system.
IntBuffer	A buffer of ints.
IntDef	Denotes that the annotated element of integer type, represents a logical type and that its value should be one of the explicitly named constants.
Integer	The wrapper for the primitive type `int` .
IntegerRes	Denotes that an integer parameter, field or method return value is expected to be an integer resource reference (e.g.
Intent	An intent is an abstract description of an operation to be performed.
Intent.FilterComparison	Wrapper class holding an Intent and implementing comparisons on it for the purpose of filtering.
Intent.ShortcutIconResource	Represents a shortcut/live folder icon resource.
IntentCompat	Helper for accessing features in `Intent` introduced after API level 4 in a backwards compatible fashion.
IntentFilter	Structured description of Intent values to be matched.
IntentFilter.AuthorityEntry	This is an entry for a single authority in the Iterator returned by `authoritiesIterator()` .
IntentFilter.MalformedMimeTypeException	This exception is thrown when a given MIME type does not have a valid syntax.
IntentSender	A description of an Intent and target action to perform with it.
IntentSender.OnFinished	Callback interface for discovering when a send operation has completed.
IntentSender.SendIntentException	Exception thrown when trying to send through a PendingIntent that has been canceled or is otherwise no longer able to execute the request.
IntentService	IntentService is a base class for `Service` s that handle asynchronous requests (expressed as `Intent` s) on demand.
InterfaceAddress	Identifies one of a network interface's addresses.
InternalError	Thrown when the VM notices that it has gotten into an undefined state.
Interpolator
Interpolator	An interpolator defines the rate of change of an animation.
Interpolator.Result
InterpolatorRes	Denotes that an integer parameter, field or method return value is expected to be an interpolator resource reference (e.g.
InterruptedException	Thrown when a waiting thread is activated before the condition it was waiting for has been satisfied.
InterruptedIOException	Signals that a blocking I/O operation has been interrupted.
InterruptibleChannel	Channels that implement this interface can be asynchronously closed and interrupted.
IntEvaluator	This evaluator can be used to perform type interpolation between `int` values.
InvalidAlgorithmParameterException	`InvalidAlgorithmParameterException` indicates the occurrence of invalid algorithm parameters.
InvalidClassException	Signals a problem during the serialization or or deserialization of an object.
InvalidCredentialsException	Authentication credentials required to respond to a authentication challenge are invalid
InvalidKeyException	`InvalidKeyException` indicates exceptional conditions, caused by an invalid key.
InvalidKeySpecException	The exception that is thrown when an invalid key specification is encountered.
InvalidMarkException	An `InvalidMarkException` is thrown when `reset()` is called on a buffer, but no mark has been set previously.
InvalidObjectException	Signals that, during deserialization, the validation of an object has failed.
InvalidParameterException	`InvalidParameterException` indicates exceptional conditions, caused by invalid parameters.
InvalidParameterSpecException	The exception that is thrown when an invalid parameter specification is encountered.
InvalidPreferencesFormatException	An exception to indicate that the input XML file is not well-formed or could not be validated against the appropriate document type (specified by in the `Preferences` ).
InvalidPropertiesFormatException	An `InvalidPropertiesFormatException` is thrown if loading the XML document defining the properties does not follow the `Properties` specification.
InvocationHandler	Implementors of this interface dispatch methods invoked on proxy instances.
InvocationTargetException	This class provides a wrapper for an exception thrown by a `Method` or `Constructor` invocation.
IOError	This error is thrown when a severe I/O error has happened.
IOException	Signals a general, I/O-related error.
IsoDep	Provides access to ISO-DEP (ISO 14443-4) properties and I/O operations on a `Tag` .
IsolatedContext	A mock context which prevents its users from talking to the rest of the device while stubbing enough methods to satify code that tries to talk to other packages.
Iterable <T>	Instances of classes that implement this interface can be used with the enhanced for loop.
Iterator <E>	An iterator over a sequence of objects, such as a collection.
IvParameterSpec	The algorithm parameter specification for an initialization vector .

J

JarEntry	Represents a single file in a JAR archive together with the manifest attributes and digital signatures associated with it.
JarException	This runtime exception is thrown when a problem occurs while reading a JAR file.
JarFile	`JarFile` is used to read jar entries and their associated data from jar files.
JarInputStream	The input stream from which the JAR file to be read may be fetched.
JarOutputStream	The `JarOutputStream` is used to write data in the `JarFile` format to an arbitrary output stream
JarURLConnection	This class establishes a connection to a `jar:` URL using the `JAR` protocol.
JavascriptInterface	Annotation that allows exposing methods to JavaScript.
JetPlayer	JetPlayer provides access to JET content playback and control.
JetPlayer.OnJetEventListener	Handles the notification when the JET engine generates an event.
JSONArray	A dense indexed sequence of values.
JSONException	Thrown to indicate a problem with the JSON API.
JSONObject	A modifiable set of name/value mappings.
JsonReader	Reads a JSON ( RFC 4627 ) encoded value as a stream of tokens.
JSONStringer	Implements `toString()` and `toString()` .
JsonToken	A structure, name or value type in a JSON-encoded string.
JSONTokener	Parses a JSON ( RFC 4627 ) encoded string into the corresponding object.
JsonWriter	Writes a JSON ( RFC 4627 ) encoded value to a stream, one token at a time.
JsPromptResult	Public class for handling JavaScript prompt requests.
JsResult	An instance of this class is passed as a parameter in various `WebChromeClient` action notifications.

K

Key	`Key` is the common interface for all keys.
KeyAgreement	This class provides the functionality for a key exchange protocol.
KeyAgreementSpi	The Service Provider Interface ( SPI ) definition for the `KeyAgreement` class.
Keyboard	Loads an XML description of a keyboard and stores the attributes of the keys.
Keyboard.Key	Class for describing the position and characteristics of a single key in the keyboard.
Keyboard.Row	Container for keys in the keyboard.
KeyboardView	A view that renders a virtual `Keyboard` .
KeyboardView.OnKeyboardActionListener	Listener for virtual keyboard events.
KeyChain	The `KeyChain` class provides access to private keys and their corresponding certificate chains in credential storage.
KeyChainAliasCallback	The KeyChainAliasCallback is the callback for `choosePrivateKeyAlias(Activity, KeyChainAliasCallback, String[], Principal[], String, int, String)` .
KeyChainException	Thrown on problems accessing the `KeyChain` .
KeyCharacterMap	Describes the keys provided by a keyboard device and their associated labels.
KeyCharacterMap.KeyData	This class was deprecated in API level 11. instead use `getDisplayLabel(int)` , `getNumber(int)` and `get(int, int)` .
KeyCharacterMap.UnavailableException	Thrown by `load(int)` when a key character map could not be loaded.
KeyEvent	Object used to report key and button events.
KeyEvent.Callback
KeyEvent.DispatcherState	Use with `dispatch(Callback, DispatcherState, Object)` for more advanced key dispatching, such as long presses.
KeyEventCompat	Helper for accessing features in `KeyEvent` introduced after API level 4 in a backwards compatible fashion.
KeyException	`KeyException` is the common superclass of all key related exceptions.
KeyFactory	`KeyFactory` is an engine class that can be used to translate between public and private key objects and convert keys between their external representation, that can be easily transported and their internal representation.
KeyFactorySpi	`KeyFactorySpi` is the Service Provider Interface (SPI) definition for `KeyFactory` .
Keyframe	This class holds a time/value pair for an animation.
KeyGenerator	This class provides the public API for generating symmetric cryptographic keys.
KeyGeneratorSpi	The Service Provider Interface ( SPI ) definition for the `KeyGenerator` class.
KeyguardManager	Class that can be used to lock and unlock the keyboard.
KeyguardManager.KeyguardLock	This class was deprecated in API level 13. Use `FLAG_DISMISS_KEYGUARD` and/or `FLAG_SHOW_WHEN_LOCKED` instead; this allows you to seamlessly hide the keyguard as your application moves in and out of the foreground and does not require that any special permissions be requested. Handle returned by `newKeyguardLock(String)` that allows you to disable / reenable the keyguard.
KeyguardManager.OnKeyguardExitResult	Callback passed to `exitKeyguardSecurely(KeyguardManager.OnKeyguardExitResult)` to notify caller of result.
KeyListener	Interface for converting text key events into edit operations on an Editable class.
KeyManagementException	`KeyManagementException` is a general exception, thrown to indicate an exception during processing an operation concerning key management.
KeyManager	This is the interface to implement in order to mark a class as a JSSE key managers so that key managers can be easily grouped.
KeyManagerFactory	The public API for `KeyManagerFactory` implementations.
KeyManagerFactorySpi	The Service Provider Interface (SPI) for the `KeyManagerFactory` class.
KeyPair	`KeyPair` is a container for a public key and a private key.
KeyPairGenerator	`KeyPairGenerator` is an engine class which is capable of generating a private key and its related public key utilizing the algorithm it was initialized with.
KeyPairGeneratorSpec	This provides the required parameters needed for initializing the `KeyPairGenerator` that works with Android KeyStore facility .
KeyPairGeneratorSpec.Builder	Builder class for `KeyPairGeneratorSpec` objects.
KeyPairGeneratorSpi	`KeyPairGeneratorSpi` is the Service Provider Interface (SPI) definition for `KeyPairGenerator` .
KeyRep	`KeyRep` is a standardized representation for serialized `Key` objects.
KeyRep.Type	`Type` enumerates the supported key types.
KeySpec	The marker interface for key specifications.
KeyStore	`KeyStore` is responsible for maintaining cryptographic keys and their owners.
KeyStore.Builder	`Builder` is used to construct new instances of `KeyStore` .
KeyStore.CallbackHandlerProtection	`CallbackHandlerProtection` is a `ProtectionParameter` that encapsulates a `CallbackHandler` .
KeyStore.Entry	`Entry` is the common marker interface for a `KeyStore` entry.
KeyStore.LoadStoreParameter	`LoadStoreParameter` represents a parameter that specifies how a `KeyStore` can be loaded and stored.
KeyStore.PasswordProtection	`PasswordProtection` is a `ProtectionParameter` that protects a `KeyStore` using a password.
KeyStore.PrivateKeyEntry	`PrivateKeyEntry` represents a `KeyStore` entry that holds a private key.
KeyStore.ProtectionParameter	`ProtectionParameter` is a marker interface for protection parameters.
KeyStore.SecretKeyEntry	`SecretKeyEntry` represents a `KeyStore` entry that holds a secret key.
KeyStore.TrustedCertificateEntry	`TrustedCertificateEntry` represents a `KeyStore` entry that holds a trusted certificate.
KeyStoreBuilderParameters	The parameters for `KeyManager` s.
KeyStoreException	`KeyStoreException` is a general `KeyStore` exception.
KeyStoreParameter	This provides the optional parameters that can be specified for `KeyStore` entries that work with Android KeyStore facility .
KeyStoreParameter.Builder	Builder class for `KeyStoreParameter` objects.
KeyStoreSpi	`KeyStoreSpi` is the Service Provider Interface (SPI) definition for `KeyStore` .

L

LabeledIntent	A special subclass of Intent that can have a custom label/icon associated with it.
LangUtils	A set of utility methods to help produce consistent `equals` and `hashCode` methods.
LargeTest	Marks a test that should run as part of the large tests.
LastOwnerException	The exception that is thrown when an attempt is made to remove the the last `Owner` from an `Owner` .
LauncherActivity	Displays a list of all activities which can be performed for a given intent.
LauncherActivity.IconResizer	Utility class to resize icons to match default icon size.
LauncherActivity.ListItem	An item in the list
LaxContentLengthStrategy	The lax implementation of the content length strategy.
LayerDrawable	A Drawable that manages an array of other Drawables.
LayeredSocketFactory	A `SocketFactory` for layered sockets (SSL/TLS).
LayerRasterizer
Layout	A base class that manages text layout in visual elements on the screen.
Layout.Alignment
Layout.Directions	Stores information about bidirectional (left-to-right or right-to-left) text within the layout of a line.
LayoutAnimationController	A layout animation controller is used to animated a layout's, or a view group's, children.
LayoutAnimationController.AnimationParameters	The set of parameters that has to be attached to each view contained in the view group animated by the layout animation controller.
LayoutDirection	A class for defining layout directions.
LayoutInflater	Instantiates a layout XML file into its corresponding `View` objects.
LayoutInflater.Factory
LayoutInflater.Factory2
LayoutInflater.Filter	Hook to allow clients of the LayoutInflater to restrict the set of Views that are allowed to be inflated.
LayoutRes	Denotes that an integer parameter, field or method return value is expected to be a layout resource reference (e.g.
LayoutTransition	This class enables automatic animations on layout changes in ViewGroup objects.
LayoutTransition.TransitionListener	This interface is used for listening to starting and ending events for transitions.
LDAPCertStoreParameters	The parameters to initialize a LDAP `CertStore` instance.
LeadingMarginSpan	A paragraph style affecting the leading margin.
LeadingMarginSpan.LeadingMarginSpan2	An extended version of `LeadingMarginSpan` , which allows the implementor to specify the number of lines of text to which this object is attached that the "first line of paragraph" margin width will be applied to.
LeadingMarginSpan.Standard	The standard implementation of LeadingMarginSpan, which adjusts the margin but does not do any rendering.
Level	`Level` objects are used to indicate the level of logging.
LevelListDrawable	A resource that manages a number of alternate Drawables, each assigned a maximum numerical value.
LexicalHandler	SAX2 extension handler for lexical events.
LightingColorFilter
LinearGradient
LinearInterpolator	An interpolator where the rate of change is constant
LinearLayout	A Layout that arranges its children in a single column or a single row.
LinearLayout.LayoutParams	Per-child layout information associated with ViewLinearLayout.
LineBackgroundSpan
LineFormatter	Interface for formatting elements of the HEAD section of an HTTP message.
LineHeightSpan
LineHeightSpan.WithDensity
LineNumberInputStream	This class was deprecated in API level 1. Use `LineNumberReader` instead.
LineNumberReader	Wraps an existing `Reader` and counts the line terminators encountered while reading the data.
LineParser	Interface for parsing lines in the HEAD section of an HTTP message.
LinkageError	`LinkageError` is the superclass of all error classes that occur when loading and linking class files.
LinkedBlockingDeque <E>	An optionally-bounded `blocking deque` based on linked nodes.
LinkedBlockingQueue <E>	An optionally-bounded `blocking queue` based on linked nodes.
LinkedHashMap <K, V>	LinkedHashMap is an implementation of `Map` that guarantees iteration order.
LinkedHashSet <E>	LinkedHashSet is a variant of HashSet.
LinkedList <E>	LinkedList is an implementation of `List` , backed by a doubly-linked list.
Linkify	Linkify take a piece of text and a regular expression and turns all of the regex matches in the text into clickable links.
Linkify.MatchFilter	MatchFilter enables client code to have more control over what is allowed to match and become a link, and what is not.
Linkify.TransformFilter	TransformFilter enables client code to have more control over how matched patterns are represented as URLs.
LinkMovementMethod	A movement method that traverses links in the text buffer and scrolls if necessary.
List <E>	A `List` is a collection which maintains an ordering for its elements.
ListActivity	An activity that displays a list of items by binding to a data source such as an array or Cursor, and exposes event handlers when the user selects an item.
ListAdapter	Extended `Adapter` that is the bridge between a `ListView` and the data that backs the list.
ListFragment	A fragment that displays a list of items by binding to a data source such as an array or Cursor, and exposes event handlers when the user selects an item.
ListFragment	Static library support version of the framework's `ListFragment` .
ListIterator <E>	An ListIterator is used to sequence over a List of objects.
ListPopupWindow	A ListPopupWindow anchors itself to a host view and displays a list of choices.
ListPopupWindowCompat	Helper for accessing features in ListPopupWindow introduced after API level 4 in a backwards compatible fashion.
ListPreference	A `Preference` that displays a list of entries as a dialog.
ListResourceBundle	`ListResourceBundle` is the abstract superclass of classes which provide resources by implementing the `getContents()` method to return the list of resources.
ListView	A view that shows items in a vertically scrolling list.
ListView.FixedViewInfo	A class that represents a fixed view in a list, for example a header at the top or a footer at the bottom.
ListViewAutoScrollHelper	An implementation of `AutoScrollHelper` that knows how to scroll through a `ListView` .
LiveFolders	This class was deprecated in API level 14. Live folders are no longer supported by Android. These have been replaced by the new AppWidget Collection APIs introduced in `HONEYCOMB` . These provide all of the features of live folders plus many more. The use of live folders is greatly discouraged because of security issues they introduce -- publishing a live folder requires making all data show for the live folder available to all applications with no permissions protecting it.
Loader <D>	An abstract class that performs asynchronous loading of data.
Loader <D>	Static library support version of the framework's `Loader` .
Loader.ForceLoadContentObserver	An implementation of a ContentObserver that takes care of connecting it to the Loader to have the loader re-load its data when the observer is told it has changed.
Loader.ForceLoadContentObserver	An implementation of a ContentObserver that takes care of connecting it to the Loader to have the loader re-load its data when the observer is told it has changed.
Loader.OnLoadCanceledListener <D>	Interface that is implemented to discover when a Loader has been canceled before it finished loading its data.
Loader.OnLoadCompleteListener <D>	Interface that is implemented to discover when a Loader has finished loading its data.
Loader.OnLoadCompleteListener <D>	Interface that is implemented to discover when a Loader has finished loading its data.
LoaderManager	Interface associated with an `Activity` or `Fragment` for managing one or more `Loader` instances associated with it.
LoaderManager	Static library support version of the framework's `LoaderManager` .
LoaderManager.LoaderCallbacks <D>	Callback interface for a client to interact with the manager.
LoaderManager.LoaderCallbacks <D>	Callback interface for a client to interact with the manager.
LoaderTestCase	A convenience class for testing `Loader` s.
LocalActivityManager	This class was deprecated in API level 13. Use the new `Fragment` and `FragmentManager` APIs instead; these are also available on older platforms through the Android compatibility package.
LocalBroadcastManager	Helper to register for and send broadcasts of Intents to local objects within your process.
Locale	`Locale` represents a language/country/variant combination.
LocaleSpan	Changes the `Locale` of the text to which the span is attached.
LocalServerSocket	non-standard class for creating inbound UNIX-domain socket on the Android platform, this is created in the Linux non-filesystem namespace.
LocalSocket	Creates a (non-server) socket in the UNIX-domain namespace.
LocalSocketAddress	A UNIX-domain (AF_LOCAL) socket address.
LocalSocketAddress.Namespace	The namespace that this address exists in.
Location	A data class representing a geographic location.
LocationListener	Used for receiving notifications from the LocationManager when the location has changed.
LocationManager	This class provides access to the system location services.
LocationProvider	An abstract superclass for location providers.
Locator	Interface for associating a SAX event with a document location.
Locator2	SAX2 extension to augment the entity information provided though a `Locator` .
Locator2Impl	SAX2 extension helper for holding additional Entity information, implementing the `Locator2` interface.
LocatorImpl	Provide an optional convenience implementation of Locator.
Lock	`Lock` implementations provide more extensive locking operations than can be obtained using `synchronized` methods and statements.
LockSupport	Basic thread blocking primitives for creating locks and other synchronization classes.
Log	API for sending log output.
Logger	Loggers are used to log records to a variety of destinations such as log files or the console.
LoggingMXBean	`LoggingMXBean` is the management interface for the logging sub-system.
LoggingPermission	Legacy security code; do not use.
LoggingSessionInputBuffer	Logs all data read to the wire LOG.
LoggingSessionOutputBuffer	Logs all data written to the wire LOG.
LoginException	Base class for exceptions that are thrown when a login error occurs.
LoginFilter	Abstract class for filtering login-related text (user names and passwords)
LoginFilter.PasswordFilterGMail	This filter is compatible with GMail passwords which restricts characters to the Latin-1 (ISO8859-1) char set.
LoginFilter.UsernameFilterGeneric	This filter rejects characters in the user name that are not compatible with Google login.
LoginFilter.UsernameFilterGMail	This filter rejects characters in the user name that are not compatible with GMail account creation.
LogManager	`LogManager` is used to maintain configuration properties of the logging framework, and to manage a hierarchical namespace of all named `Logger` objects.
LogPrinter	Implementation of a `Printer` that sends its output to the system log.
LogRecord	A `LogRecord` object represents a logging request.
Long	The wrapper for the primitive type `long` .
Long2	Vector version of the basic long type.
Long2	Class for exposing the native RenderScript long2 type back to the Android system.
Long3	Vector version of the basic long type.
Long3	Class for exposing the native RenderScript long3 type back to the Android system.
Long4	Vector version of the basic long type.
Long4	Class for exposing the native RenderScript long4 type back to the Android system.
LongBuffer	A buffer of longs.
LongSparseArray <E>	SparseArray mapping longs to Objects, a version of the platform's `LongSparseArray` that can be used on older versions of the platform.
LongSparseArray <E>	SparseArray mapping longs to Objects.
Looper	Class used to run a message loop for a thread.
LoudnessEnhancer	LoudnessEnhancer is an audio effect for increasing audio loudness.
LruCache <K, V>	Static library version of `LruCache` .
LruCache <K, V>	A cache that holds strong references to a limited number of values.
LSException	Parser or write operations may throw an `LSException` if the processing is stopped.
LSInput	This interface represents an input source for data.
LSOutput	This interface represents an output destination for data.
LSParser	An interface to an object that is able to build, or augment, a DOM tree from various input sources.
LSParserFilter	`LSParserFilter` s provide applications the ability to examine nodes as they are being constructed while parsing.
LSResourceResolver	`LSResourceResolver` provides a way for applications to redirect references to external resources.
LSSerializer	A `LSSerializer` provides an API for serializing (writing) a DOM document out into XML.

M

Mac	This class provides the public API for Message Authentication Code (MAC) algorithms.
MacSpi	The Service-Provider Interface ( SPI ) definition for the `Mac` class.
MailTo	MailTo URL parser This class parses a mailto scheme URL and then can be queried for the parsed parameters.
MalformedChallengeException	Signals that authentication challenge is in some way invalid or illegal in the given context
MalformedChunkCodingException	Signals a malformed chunked stream.
MalformedCookieException	Signals that a cookie is in some way invalid or illegal in a given context
MalformedInputException	A `MalformedInputException` is thrown when a malformed input is encountered, for example if a byte sequence is illegal for the given charset.
MalformedJsonException	Thrown when a reader encounters malformed JSON.
MalformedParameterizedTypeException	Indicates that a malformed parameterized type has been encountered by a reflective method.
MalformedURLException	This exception is thrown when a program attempts to create an URL from an incorrect specification.
ManagedClientConnection	A client-side connection with advanced connection logic.
ManagerFactoryParameters	The marker interface for key manager factory parameters.
Manifest
Manifest	The `Manifest` class is used to obtain attribute information for a `JarFile` and its entries.
Manifest.permission
Manifest.permission_group
Map <K, V>	A `Map` is a data structure consisting of a set of keys and values in which each key is mapped to a single value.
Map.Entry <K, V>	`Map.Entry` is a key/value mapping contained in a `Map` .
MappedByteBuffer	`MappedByteBuffer` is a special kind of direct byte buffer which maps a region of file to memory.
MarginLayoutParamsCompat	Helper for accessing API features in `MarginLayoutParams` added after API 4.
MaskFilter	MaskFilter is the base class for object that perform transformations on an alpha-channel mask before drawing it.
MaskFilterSpan
Matcher	The result of applying a `Pattern` to a given input.
MatchResult	Holds the results of a successful match of a `Pattern` against a given string.
Math	Class Math provides basic math constants and operations such as trigonometric functions, hyperbolic functions, exponential, logarithms, etc.
MathContext	Immutable objects describing settings such as rounding mode and digit precision for the numerical operations provided by class `BigDecimal` .
Matrix	The Matrix class holds a 3x3 matrix for transforming coordinates.
Matrix	Matrix math utilities.
Matrix.ScaleToFit	Controlls how the src rect should align into the dst rect for setRectToRect().
Matrix2f	Class for exposing the native RenderScript rs_matrix2x2 type back to the Android system.
Matrix2f	Class for exposing the native RenderScript rs_matrix2x2 type back to the Android system.
Matrix3f	Class for exposing the native RenderScript rs_matrix3x3 type back to the Android system.
Matrix3f	Class for exposing the native RenderScript rs_matrix3x3 type back to the Android system.
Matrix4f	Class for exposing the native RenderScript rs_matrix4x4 type back to the Android system.
Matrix4f	Class for exposing the native RenderScript rs_matrix4x4 type back to the Android system.
MatrixCursor	A mutable cursor implementation backed by an array of `Object` s.
MatrixCursor.RowBuilder	Builds a row of values using either of these approaches: Values can be added with explicit column ordering using `add(Object)` , which starts from the left-most column and adds one column value at a time.
MediaActionSound	A class for producing sounds that match those produced by various actions taken by the media and camera APIs.
MediaCodec	MediaCodec class can be used to access low-level media codec, i.e.
MediaCodec.BufferInfo	Per buffer metadata includes an offset and size specifying the range of valid data in the associated codec buffer.
MediaCodec.CryptoException	Thrown when a crypto error occurs while queueing a secure input buffer.
MediaCodec.CryptoInfo	Metadata describing the structure of a (at least partially) encrypted input sample.
MediaCodecInfo	Provides information about a given media codec available on the device.
MediaCodecInfo.CodecCapabilities	Encapsulates the capabilities of a given codec component.
MediaCodecInfo.CodecProfileLevel	Encapsulates the profiles available for a codec component.
MediaCodecList	Allows you to enumerate available codecs, each specified as a `MediaCodecInfo` object, find a codec supporting a given format and query the capabilities of a given codec.
MediaControlIntent	Constants for media control intents.
MediaController	A view containing controls for a MediaPlayer.
MediaController.MediaPlayerControl
MediaCrypto	MediaCrypto class can be used in conjunction with `MediaCodec` to decode encrypted media data.
MediaCryptoException	Exception thrown if MediaCrypto object could not be instantiated for whatever reason.
MediaDrm	MediaDrm can be used to obtain keys for decrypting protected media streams, in conjunction with `MediaCrypto` .
MediaDrm.CryptoSession	In addition to supporting decryption of DASH Common Encrypted Media, the MediaDrm APIs provide the ability to securely deliver session keys from an operator's session key server to a client device, based on the factory-installed root of trust, and then perform encrypt, decrypt, sign and verify operations with the session key on arbitrary user data.
MediaDrm.KeyRequest	Contains the opaque data an app uses to request keys from a license server
MediaDrm.OnEventListener	Interface definition for a callback to be invoked when a drm event occurs
MediaDrm.ProvisionRequest	Contains the opaque data an app uses to request a certificate from a provisioning server
MediaDrmException	Base class for MediaDrm exceptions
MediaExtractor	MediaExtractor facilitates extraction of demuxed, typically encoded, media data from a data source.
MediaFormat	Encapsulates the information describing the format of media data, be it audio or video.
MediaItemMetadata	Constants for specifying metadata about a media item as a `Bundle` .
MediaItemStatus	Describes the playback status of a media item.
MediaItemStatus.Builder	Builder for `media item status objects` .
MediaMetadataEditor	An abstract class for editing and storing metadata that can be published by `RemoteControlClient` .
MediaMetadataRetriever	MediaMetadataRetriever class provides a unified interface for retrieving frame and meta data from an input media file.
MediaMuxer	MediaMuxer facilitates muxing elementary streams.
MediaMuxer.OutputFormat	Defines the output format.
MediaPlayer	MediaPlayer class can be used to control playback of audio/video files and streams.
MediaPlayer.OnBufferingUpdateListener	Interface definition of a callback to be invoked indicating buffering status of a media resource being streamed over the network.
MediaPlayer.OnCompletionListener	Interface definition for a callback to be invoked when playback of a media source has completed.
MediaPlayer.OnErrorListener	Interface definition of a callback to be invoked when there has been an error during an asynchronous operation (other errors will throw exceptions at method call time).
MediaPlayer.OnInfoListener	Interface definition of a callback to be invoked to communicate some info and/or warning about the media or its playback.
MediaPlayer.OnPreparedListener	Interface definition for a callback to be invoked when the media source is ready for playback.
MediaPlayer.OnSeekCompleteListener	Interface definition of a callback to be invoked indicating the completion of a seek operation.
MediaPlayer.OnTimedTextListener	Interface definition of a callback to be invoked when a timed text is available for display.
MediaPlayer.OnVideoSizeChangedListener	Interface definition of a callback to be invoked when the video size is first known or updated
MediaPlayer.TrackInfo	Class for MediaPlayer to return each audio/video/subtitle track's metadata.
MediaRecorder	Used to record audio and video.
MediaRecorder.AudioEncoder	Defines the audio encoding.
MediaRecorder.AudioSource	Defines the audio source.
MediaRecorder.OnErrorListener	Interface definition for a callback to be invoked when an error occurs while recording.
MediaRecorder.OnInfoListener	Interface definition for a callback to be invoked when an error occurs while recording.
MediaRecorder.OutputFormat	Defines the output format.
MediaRecorder.VideoEncoder	Defines the video encoding.
MediaRecorder.VideoSource	Defines the video source.
MediaRouteActionProvider	The media route action provider displays a `media route button` in the application's `ActionBar` to allow the user to select routes and to control the currently selected route.
MediaRouteActionProvider	The media route action provider displays a `media route button` in the application's `ActionBar` to allow the user to select routes and to control the currently selected route.
MediaRouteButton
MediaRouteButton	The media route button allows the user to select routes and to control the currently selected route.
MediaRouteChooserDialog	This class implements the route chooser dialog for `MediaRouter` .
MediaRouteChooserDialogFragment	Media route chooser dialog fragment.
MediaRouteControllerDialog	This class implements the route controller dialog for `MediaRouter` .
MediaRouteControllerDialogFragment	Media route controller dialog fragment.
MediaRouteDescriptor	Describes the properties of a route.
MediaRouteDescriptor.Builder	Builder for `media route descriptors` .
MediaRouteDialogFactory	The media route dialog factory is responsible for creating the media route chooser and controller dialogs as needed.
MediaRouteDiscoveryFragment	Media route discovery fragment.
MediaRouteDiscoveryRequest	Describes the kinds of routes that the media router would like to discover and whether to perform active scanning.
MediaRouteProvider	Media route providers are used to publish additional media routes for use within an application.
MediaRouteProvider.Callback	Callback which is invoked when route information becomes available or changes.
MediaRouteProvider.ProviderMetadata	Describes properties of the route provider's implementation.
MediaRouteProvider.RouteController	Provides control over a particular route.
MediaRouteProviderDescriptor	Describes the state of a media route provider and the routes that it publishes.
MediaRouteProviderDescriptor.Builder	Builder for `media route provider descriptors` .
MediaRouteProviderService	Base class for media route provider services.
MediaRouter	MediaRouter allows applications to control the routing of media channels and streams from the current device to external speakers and destination devices.
MediaRouter	MediaRouter allows applications to control the routing of media channels and streams from the current device to external speakers and destination devices.
MediaRouter.Callback	Interface for receiving events about media routing changes.
MediaRouter.Callback	Interface for receiving events about media routing changes.
MediaRouter.ControlRequestCallback	Callback which is invoked with the result of a media control request.
MediaRouter.ProviderInfo	Provides information about a media route provider.
MediaRouter.RouteCategory	Definition of a category of routes.
MediaRouter.RouteGroup	Information about a route that consists of multiple other routes in a group.
MediaRouter.RouteInfo	Information about a media route.
MediaRouter.RouteInfo	Provides information about a media route.
MediaRouter.SimpleCallback	Stub implementation of `MediaRouter.Callback` .
MediaRouter.UserRouteInfo	Information about a route that the application may define and modify.
MediaRouter.VolumeCallback	Interface for receiving events about volume changes.
MediaRouteSelector	Describes the capabilities of routes that applications would like to discover and use.
MediaRouteSelector.Builder	Builder for `media route selectors` .
MediaScannerConnection	MediaScannerConnection provides a way for applications to pass a newly created or downloaded media file to the media scanner service.
MediaScannerConnection.MediaScannerConnectionClient	An interface for notifying clients of MediaScannerConnection when a connection to the MediaScanner service has been established and when the scanning of a file has completed.
MediaScannerConnection.OnScanCompletedListener	Interface for notifying clients of the result of scanning a requested media file.
MediaSessionStatus	Describes the playback status of a media session.
MediaSessionStatus.Builder	Builder for `media session status objects` .
MediaStore	The Media provider contains meta data for all available media on both internal and external storage devices.
MediaStore.Audio	Container for all audio content.
MediaStore.Audio.AlbumColumns	Columns representing an album
MediaStore.Audio.Albums	Contains artists for audio files
MediaStore.Audio.ArtistColumns	Columns representing an artist
MediaStore.Audio.Artists	Contains artists for audio files
MediaStore.Audio.Artists.Albums	Sub-directory of each artist containing all albums on which a song by the artist appears.
MediaStore.Audio.AudioColumns	Columns for audio file that show up in multiple tables.
MediaStore.Audio.Genres	Contains all genres for audio files
MediaStore.Audio.Genres.Members	Sub-directory of each genre containing all members.
MediaStore.Audio.GenresColumns	Columns representing an audio genre
MediaStore.Audio.Media
MediaStore.Audio.Playlists	Contains playlists for audio files
MediaStore.Audio.Playlists.Members	Sub-directory of each playlist containing all members.
MediaStore.Audio.PlaylistsColumns	Columns representing a playlist
MediaStore.Files	Media provider table containing an index of all files in the media storage, including non-media files.
MediaStore.Files.FileColumns	Fields for master table for all media files.
MediaStore.Images	Contains meta data for all available images.
MediaStore.Images.ImageColumns
MediaStore.Images.Media
MediaStore.Images.Thumbnails	This class allows developers to query and get two kinds of thumbnails: MINI_KIND: 512 x 384 thumbnail MICRO_KIND: 96 x 96 thumbnail
MediaStore.MediaColumns	Common fields for most MediaProvider tables
MediaStore.Video
MediaStore.Video.Media
MediaStore.Video.Thumbnails	This class allows developers to query and get two kinds of thumbnails: MINI_KIND: 512 x 384 thumbnail MICRO_KIND: 96 x 96 thumbnail
MediaStore.Video.VideoColumns
MediaSyncEvent	The MediaSyncEvent class defines events that can be used to synchronize playback or capture actions between different players and recorders.
MediumTest	Marks a test that should run as part of the medium tests.
Member	Common interface providing access to reflective information on class members.
MemoryFile	MemoryFile is a wrapper for the Linux ashmem driver.
MemoryHandler	A `Handler` put the description of log events into a cycled memory buffer.
Menu	Interface for managing the items in a menu.
MenuCompat	Helper for accessing features in `Menu` introduced after API level 4 in a backwards compatible fashion.
MenuInflater	This class is used to instantiate menu XML files into Menu objects.
MenuItem	Interface for direct access to a previously created menu item.
MenuItem.OnActionExpandListener	Interface definition for a callback to be invoked when a menu item marked with `SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW` is expanded or collapsed.
MenuItem.OnMenuItemClickListener	Interface definition for a callback to be invoked when a menu item is clicked.
MenuItemCompat	Helper for accessing features in `MenuItem` introduced after API level 4 in a backwards compatible fashion.
MenuItemCompat.OnActionExpandListener	Interface definition for a callback to be invoked when a menu item marked with `SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW` is expanded or collapsed.
MenuRes	Denotes that an integer parameter, field or method return value is expected to be a menu resource reference.
MergeCursor	A convience class that lets you present an array of Cursors as a single linear Cursor.
Message	Defines a message containing a description and arbitrary data object that can be sent to a `Handler` .
MessageDigest	Uses a one-way hash function to turn an arbitrary number of bytes into a fixed-length byte sequence.
MessageDigestSpi	`MessageDigestSpi` is the Service Provider Interface (SPI) definition for `MessageDigest` .
MessageFormat	Produces concatenated messages in language-neutral way.
MessageFormat.Field	The instances of this inner class are used as attribute keys in `AttributedCharacterIterator` that the `formatToCharacterIterator(Object)` method returns.
MessageQueue	Low-level class holding the list of messages to be dispatched by a `Looper` .
MessageQueue.IdleHandler	Callback interface for discovering when a thread is going to block waiting for more messages.
Messenger	Reference to a Handler, which others can use to send messages to it.
MetaKeyKeyListener	This base class encapsulates the behavior for tracking the state of meta keys such as SHIFT, ALT and SYM as well as the pseudo-meta state of selecting text.
Method	This class represents a method.
MethodNotSupportedException	Indicates that an HTTP method is not supported.
MetricAffectingSpan	The classes that affect character-level text formatting in a way that changes the width or height of characters extend this class.
MGF1ParameterSpec	The parameter specification for the Mask Generation Function (MGF1) in the RSA-PSS Signature and OAEP Padding scheme.
MifareClassic	Provides access to MIFARE Classic properties and I/O operations on a `Tag` .
MifareUltralight	Provides access to MIFARE Ultralight properties and I/O operations on a `Tag` .
MimeTypeMap	Two-way map that maps MIME-types to file extensions and vice versa.
MissingFormatArgumentException	A `MissingFormatArgumentException` will be thrown if there is no corresponding argument with the specified conversion or an argument index that refers to a missing argument.
MissingFormatWidthException	A `MissingFormatWidthException` will be thrown if the format width is missing but is required.
MissingResourceException	A `MissingResourceException` is thrown by ResourceBundle when a resource bundle cannot be found or a resource is missing from a resource bundle.
MockApplication	A mock `Application` class.
MockContentProvider	Mock implementation of ContentProvider.
MockContentResolver	An extension of `ContentResolver` that is designed for testing.
MockContext	A mock `Context` class.
MockCursor	A mock `Cursor` class that isolates the test code from real Cursor implementation.
MockDialogInterface	A mock `DialogInterface` class.
MockPackageManager	A mock `PackageManager` class.
MockResources	A mock `Resources` class.
Modifier	This class provides static methods to decode class and member modifiers.
MonthDisplayHelper	Helps answer common questions that come up when displaying a month in a 6 row calendar grid format.
MoreAsserts	Contains additional assertion methods not found in JUnit.
MotionEvent	Object used to report movement (mouse, pen, finger, trackball) events.
MotionEvent.PointerCoords	Transfer object for pointer coordinates.
MotionEvent.PointerProperties	Transfer object for pointer properties.
MotionEventCompat	Helper for accessing features in `MotionEvent` introduced after API level 4 in a backwards compatible fashion.
MovementMethod	Provides cursor positioning, scrolling and text selection functionality in a `TextView` .
Movie
MtpConstants	A class containing constants in the MTP and PTP specifications.
MtpDevice	This class represents an MTP or PTP device connected on the USB host bus.
MtpDeviceInfo	This class encapsulates information about an MTP device.
MtpObjectInfo	This class encapsulates information about an object on an MTP device.
MtpStorageInfo	This class encapsulates information about a storage unit on an MTP device.
MultiAutoCompleteTextView	An editable text view, extending `AutoCompleteTextView` , that can show completion suggestions for the substring of the text where the user is typing instead of necessarily for the entire thing.
MultiAutoCompleteTextView.CommaTokenizer	This simple Tokenizer can be used for lists where the items are separated by a comma and one or more spaces.
MultiAutoCompleteTextView.Tokenizer
MulticastSocket	This class implements a multicast socket for sending and receiving IP multicast datagram packets.
MultihomePlainSocketFactory	Socket factory that implements a simple multi-home fail-over on connect failure, provided the same hostname resolves to multiple `InetAddress` es.
MultiSelectListPreference	A `Preference` that displays a list of entries as a dialog.
MultiTapKeyListener	This is the standard key listener for alphabetic input on 12-key keyboards.
MutableContextWrapper	Special version of `ContextWrapper` that allows the base context to be modified after it is initially set.

N

NamedNodeMap	Objects implementing the `NamedNodeMap` interface are used to represent collections of nodes that can be accessed by name.
NameList	The `NameList` interface provides the abstraction of an ordered collection of parallel pairs of name and namespace values (which could be null values), without defining or constraining how this collection is implemented.
NamespaceContext	Interface for read only XML Namespace context processing.
NamespaceSupport	Encapsulate Namespace logic for use by applications using SAX, or internally by SAX drivers.
NameValuePair	A simple class encapsulating an attribute/value pair.
NativeActivity	Convenience for implementing an activity that will be implemented purely in native code.
NavigableMap <K, V>	A `SortedMap` extended with navigation methods returning the closest matches for given search targets.
NavigableSet <E>	A `SortedSet` extended with navigation methods reporting closest matches for given search targets.
NavUtils	NavUtils provides helper functionality for applications implementing recommended Android UI navigation patterns.
NClob
Ndef	Provides access to NDEF content and operations on a `Tag` .
NdefFormatable	Provide access to NDEF format operations on a `Tag` .
NdefMessage	Represents an immutable NDEF Message.
NdefRecord	Represents an immutable NDEF Record.
NegativeArraySizeException	Thrown when an attempt is made to create an array with a size of less than zero.
NeighboringCellInfo	Represents the neighboring cell information, including Received Signal Strength and Cell ID location.
NetPermission	Legacy security code; do not use.
NetscapeDomainHandler
NetscapeDraftHeaderParser
NetscapeDraftSpec	Netscape cookie draft compliant cookie policy
NetscapeDraftSpecFactory
NetworkErrorException
NetworkInfo	Describes the status of a network interface.
NetworkInfo.DetailedState	The fine-grained state of a network connection.
NetworkInfo.State	Coarse-grained network state.
NetworkInterface	This class is used to represent a network interface of the local device.
NetworkOnMainThreadException	The exception that is thrown when an application attempts to perform a networking operation on its main thread.
NfcA	Provides access to NFC-A (ISO 14443-3A) properties and I/O operations on a `Tag` .
NfcAdapter	Represents the local NFC adapter.
NfcAdapter.CreateBeamUrisCallback
NfcAdapter.CreateNdefMessageCallback	A callback to be invoked when another NFC device capable of NDEF push (Android Beam) is within range.
NfcAdapter.OnNdefPushCompleteCallback	A callback to be invoked when the system successfully delivers your `NdefMessage` to another device.
NfcAdapter.ReaderCallback	A callback to be invoked when the system finds a tag while the foreground activity is operating in reader mode.
NfcB	Provides access to NFC-B (ISO 14443-3B) properties and I/O operations on a `Tag` .
NfcBarcode	Provides access to tags containing just a barcode.
NfcEvent	Wraps information associated with any NFC event.
NfcF	Provides access to NFC-F (JIS 6319-4) properties and I/O operations on a `Tag` .
NfcManager	High level manager used to obtain an instance of an `NfcAdapter` .
NfcV	Provides access to NFC-V (ISO 15693) properties and I/O operations on a `Tag` .
NinePatch	The NinePatch class permits drawing a bitmap in nine or more sections.
NinePatchDrawable	A resizeable bitmap, with stretchable areas that you define.
NoClassDefFoundError	Thrown when the VM is unable to locate a class which it has been asked to load.
NoConnectionPendingException	A `NoConnectionPendingException` is thrown if `SocketChannel` 's `finishConnect` method is called before the `SocketChannel` 's `connect(java.net.SocketAddress)` connect} method completed without error.
NoConnectionReuseStrategy	A strategy that never re-uses a connection.
NoCopySpan	This interface should be added to a span object that should not be copied into a new Spenned when performing a slice or copy operation on the original Spanned it was placed in.
NoCopySpan.Concrete	Convenience equivalent for when you would just want a new Object() for a span but want it to be no-copy.
Node	The `Node` interface is the primary datatype for the entire Document Object Model.
NodeChangeEvent	This is the event class to indicate that one child of the preference node has been added or deleted.
NodeChangeListener	This interface is used to handle preference node change events.
NodeList	The `NodeList` interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented.
NoHttpResponseException	Signals that the target server failed to respond with a valid HTTP response.
NoiseSuppressor	Noise Suppressor (NS).
NonNull	Denotes that a parameter, field or method return value can never be null.
NonReadableChannelException	A `NonReadableChannelException` is thrown when attempting to read from a channel that is not open for reading.
NonRepeatableRequestException	Signals failure to retry the request due to non-repeatable request entity.
NonWritableChannelException	A `NonWritableChannelException` is thrown when attempting to write to a channel that is not open for writing.
Normalizer	Provides normalization functions according to Unicode Standard Annex #15: Unicode Normalization Forms .
Normalizer.Form	The normalization forms supported by the Normalizer.
NoRouteToHostException	The `NoRouteToHostException` will be thrown while attempting to connect to a remote host but the host cannot be reached for instance because of a badly configured router or a blocking firewall.
NoSuchAlgorithmException	`NoSuchAlgorithmException` indicates that a requested algorithm could not be found.
NoSuchElementException	Thrown when trying to retrieve an element past the end of an Enumeration or Iterator.
NoSuchFieldError	Thrown when the VM notices that a program tries to reference, on a class or object, a field that does not exist.
NoSuchFieldException	Thrown when the VM notices that a program tries to reference, on a class or object, a field that does not exist.
NoSuchMethodError	Thrown when the VM notices that a program tries to reference, on a class or object, a method that does not exist.
NoSuchMethodException	Thrown when the VM notices that a program tries to reference, on a class or object, a method that does not exist.
NoSuchPaddingException	The exception that is thrown when the requested padding mechanism is not supported.
NoSuchPropertyException	Thrown when code requests a `Property` on a class that does not expose the appropriate method or field.
NoSuchProviderException	`NoSuchProviderException` indicates that a requested security provider could not be found.
NotActiveException	Signals that a serialization-related method has been invoked in the wrong place.
Notation	This interface represents a notation declared in the DTD.
Notification	A class that represents how a persistent notification is to be presented to the user using the `NotificationManager` .
Notification.Action	Structure to encapsulate a named action that can be shown as part of this notification.
Notification.Action.Builder	Builder class for `Notification.Action` objects.
Notification.Action.Extender	Extender interface for use with `extend(Notification.Action.Extender)` .
Notification.Action.WearableExtender	Wearable extender for notification actions.
Notification.BigPictureStyle	Helper class for generating large-format notifications that include a large image attachment.
Notification.BigTextStyle	Helper class for generating large-format notifications that include a lot of text.
Notification.Builder	Builder class for `Notification` objects.
Notification.Extender	Extender interface for use with `extend(Notification.Action.Extender)` .
Notification.InboxStyle	Helper class for generating large-format notifications that include a list of (up to 5) strings.
Notification.Style	An object that can apply a rich notification style to a `Notification.Builder` object.
Notification.WearableExtender	Helper class to add wearable extensions to notifications.
NotificationCompat	Helper for accessing features in `Notification` introduced after API level 4 in a backwards compatible fashion.
NotificationCompat.Action	Structure to encapsulate a named action that can be shown as part of this notification.
NotificationCompat.Action.Builder	Builder class for `NotificationCompat.Action` objects.
NotificationCompat.Action.Extender	Extender interface for use with `extend(NotificationCompat.Extender)` .
NotificationCompat.Action.WearableExtender	Wearable extender for notification actions.
NotificationCompat.BigPictureStyle	Helper class for generating large-format notifications that include a large image attachment.
NotificationCompat.BigTextStyle	Helper class for generating large-format notifications that include a lot of text.
NotificationCompat.Builder	Builder class for `NotificationCompat` objects.
NotificationCompat.Extender	Extender interface for use with `extend(NotificationCompat.Extender)` .
NotificationCompat.InboxStyle	Helper class for generating large-format notifications that include a list of (up to 5) strings.
NotificationCompat.Style	An object that can apply a rich notification style to a `Notification.Action.Builder` object.
NotificationCompat.WearableExtender	Helper class to add wearable extensions to notifications.
NotificationCompatExtras	Well-known extras used by `NotificationCompat` for backwards compatibility.
NotificationCompatSideChannelService	Abstract service to receive side channel notifications sent from `NotificationManagerCompat` .
NotificationListenerService	A service that receives calls from the system when new notifications are posted or removed.
NotificationManager	Class to notify the user of events that happen. This is how you tell the user that something has happened in the background.
NotificationManagerCompat	Compatibility library for NotificationManager with fallbacks for older platforms.
NotOwnerException	The exception that is thrown when an action that requires ownership is attempted by a principal that is not an owner of the object for which ownership is required.
NotProvisionedException	Exception thrown when an operation on a MediaDrm object is attempted and the device does not have a certificate.
NotSerializableException	Signals that an object that is not serializable has been passed into the `ObjectOutput.writeObject()` method.
NotYetBoundException	A `NotYetBoundException` is thrown if the server socket channel is not bound before an I/O operation is made.
NotYetConnectedException	A `NotYetConnectedException` is thrown if the socket channel is not connected before an I/O operation is invoked.
NsdManager	The Network Service Discovery Manager class provides the API to discover services on a network.
NsdManager.DiscoveryListener	Interface for callback invocation for service discovery
NsdManager.RegistrationListener	Interface for callback invocation for service registration
NsdManager.ResolveListener	Interface for callback invocation for service resolution
NsdServiceInfo	A class representing service information for network service discovery
NTCredentials	`Credentials` specific to the Windows platform.
NTLMEngine	Abstract NTLM authentication engine.
NTLMEngineException	Signals NTLM protocol failure.
NTLMScheme
NTUserPrincipal	NT (MS Windows specific) user principal used for HTTP authentication
Nullable	Denotes that a parameter, field or method return value can be null.
NullCipher	This class provides an identity cipher that does not transform the input data in any way.
NullPointerException	Thrown when a program tries to access a field or method of an object or an element of an array when there is no instance or array to use, that is if the object or array points to `null` .
Number	The abstract superclass of the classes which represent numeric base types (that is `Byte` , `Short` , `Integer` , `Long` , `Float` , and `Double` .
NumberFormat	The abstract base class for all number formats.
NumberFormat.Field	The instances of this inner class are used as attribute keys and values in `AttributedCharacterIterator` that the `formatToCharacterIterator(Object)` method returns.
NumberFormatException	Thrown when an invalid value is passed to a string-to-number conversion method.
NumberKeyListener	For numeric text entry As for all implementations of `KeyListener` , this class is only concerned with hardware keyboards.
NumberPicker	A widget that enables the user to select a number form a predefined range.
NumberPicker.Formatter	Interface used to format current value into a string for presentation.
NumberPicker.OnScrollListener	Interface to listen for the picker scroll state.
NumberPicker.OnValueChangeListener	Interface to listen for changes of the current value.
NumericShaper	The Class NumericShaper provides methods to convert latin character codes to unicode character codes.

O

OAEPParameterSpec	The algorithm parameter specification for the OAEP Padding algorithm.
ObbInfo	Basic information about a Opaque Binary Blob (OBB) that reflects the info from the footer on the OBB file.
ObbScanner	Class to scan Opaque Binary Blob (OBB) files.
Object	The root class of the Java class hierarchy.
ObjectAnimator	This subclass of `ValueAnimator` provides support for animating properties on target objects.
ObjectInput	Defines an interface for classes that allow reading serialized objects.
ObjectInputStream	A specialized `InputStream` that is able to read (deserialize) Java objects as well as primitive data types (int, byte, char etc.).
ObjectInputStream.GetField	GetField is an inner class that provides access to the persistent fields read from the source stream.
ObjectInputValidation	A callback interface for post-deserialization checks on objects.
ObjectOutput	Defines an interface for classes that allow writing serialized objects.
ObjectOutputStream	A specialized `OutputStream` that is able to write (serialize) Java objects as well as primitive data types (int, byte, char etc.).
ObjectOutputStream.PutField	PutField is an inner class to provide access to the persistent fields that are written to the target stream.
Objects	Utility methods for objects.
ObjectStreamClass	Represents a descriptor for identifying a class during serialization and deserialization.
ObjectStreamConstants	A helper interface with constants used by the serialization implementation.
ObjectStreamException	Signals some sort of problem during either serialization or deserialization of objects.
ObjectStreamField	Describes a field for the purpose of serialization.
Observable <T>	Provides methods for registering or unregistering arbitrary observers in an `ArrayList` .
Observable	Observable is used to notify a group of Observer objects when a change occurs.
Observer	`Observer` is the interface to be implemented by objects that receive notification of updates on an `Observable` object.
OffHostApduService	OffHostApduService is a convenience `Service` class that can be extended to describe one or more NFC applications that are residing off-host, for example on an embedded secure element or a UICC.
OnAccountsUpdateListener	An interface that contains the callback used by the AccountManager
OnObbStateChangeListener	Used for receiving notifications from `StorageManager` about OBB file states.
OpcodeInfo	Information about Dalvik opcodes.
Opcodes	A list of all normal (not implementation-specific) Dalvik opcodes.
OpenableColumns	These are standard columns for openable URIs.
OperatedClientConnection	A client-side connection that relies on outside logic to connect sockets to the appropriate hosts.
OperationApplicationException	Thrown when an application of a `ContentProviderOperation` fails due the specified constraints.
OperationCanceledException
OperationCanceledException	An exception type that is thrown when an operation in progress is canceled.
OptionalDataException	Signals that the `ObjectInputStream` class encountered a primitive type ( `int` , `char` etc.) instead of an object instance in the input stream.
OrientationEventListener	Helper class for receiving notifications from the SensorManager when the orientation of the device has changed.
OrientationListener	This class was deprecated in API level 3. use `OrientationEventListener` instead. This class internally uses the OrientationEventListener.
OrientedBoundingBox	An oriented bounding box
OutOfMemoryError	Thrown when a request for memory is made that can not be satisfied using the available platform resources.
OutputKeys	Provides string constants that can be used to set output properties for a Transformer, or to retrieve output properties from a Transformer or Templates object.
OutputStream	A writable sink for bytes.
OutputStreamWriter	A class for turning a character stream into a byte stream.
OvalShape	Defines an oval shape.
OverlappingFileLockException	An `OverlappingFileLockException` is thrown when attempting to acquire a lock that overlaps an existing or pending lock held by this process.
Override	Annotation type used to mark methods that override a method declaration in a superclass.
OverScroller	This class encapsulates scrolling with the ability to overshoot the bounds of a scrolling operation.
OvershootInterpolator	An interpolator where the change flings forward and overshoots the last value then comes back.
Owner	The interface to manage owners of objects that require ownership.

P

Pack200	Class factory for `Pack200.Packer` and `Pack200.Unpacker` .
Pack200.Packer	The interface defining the API for converting a JAR file to an output stream in the Pack200 format.
Pack200.Unpacker	The interface defining the API for converting a packed stream in the Pack200 format to a JAR file.
Package	Contains information about a Java package.
PackageInfo	Overall information about the contents of a package.
PackageItemInfo	Base class containing information common to all package items held by the package manager.
PackageItemInfo.DisplayNameComparator
PackageManager	Class for retrieving various kinds of information related to the application packages that are currently installed on the device.
PackageManager.NameNotFoundException	This exception is thrown when a given package, application, or component name cannot be found.
PackageStats	implementation of PackageStats associated with a application package.
PagerAdapter	Base class providing the adapter to populate pages inside of a `ViewPager` .
PageRange	Represents a range of pages.
PagerTabStrip	PagerTabStrip is an interactive indicator of the current, next, and previous pages of a `ViewPager` .
PagerTitleStrip	PagerTitleStrip is a non-interactive indicator of the current, next, and previous pages of a `ViewPager` .
Paint	The Paint class holds the style and color information about how to draw geometries, text and bitmaps.
Paint.Align	Align specifies how drawText aligns its text relative to the [x,y] coordinates.
Paint.Cap	The Cap specifies the treatment for the beginning and ending of stroked lines and paths.
Paint.FontMetrics	Class that describes the various metrics for a font at a given text size.
Paint.FontMetricsInt	Convenience method for callers that want to have FontMetrics values as integers.
Paint.Join	The Join specifies the treatment where lines and curve segments join on a stroked path.
Paint.Style	The Style specifies if the primitive being drawn is filled, stroked, or both (in the same color).
PaintDrawable	Drawable that draws its bounds in the given paint, with optional rounded corners.
PaintFlagsDrawFilter
Pair <F, S>	Container to ease passing around a tuple of two objects.
ParagraphStyle	The classes that affect paragraph-level text formatting implement this interface.
ParameterizedType	This interface represents a parameterized type such as `'Set<String>'` .
ParameterMetaData	An interface used to get information about the types and properties of parameters in a `PreparedStatement` .
Parcel	Container for a message (data and object references) that can be sent through an IBinder.
Parcelable	Interface for classes whose instances can be written to and restored from a `Parcel` .
Parcelable.ClassLoaderCreator <T>	Specialization of `Parcelable.Creator` that allows you to receive the ClassLoader the object is being created in.
Parcelable.Creator <T>	Interface that must be implemented and provided as a public CREATOR field that generates instances of your Parcelable class from a Parcel.
ParcelableCompat	Helper for accessing features in `Parcelable` introduced after API level 4 in a backwards compatible fashion.
ParcelableCompatCreatorCallbacks <T>	Callbacks a `Parcelable` creator should implement.
ParcelableSpan	A special kind of Parcelable for objects that will serve as text spans.
ParcelFileDescriptor	The FileDescriptor returned by `readFileDescriptor()` , allowing you to close it when done with it.
ParcelFileDescriptor.AutoCloseInputStream	An InputStream you can create on a ParcelFileDescriptor, which will take care of calling `ParcelFileDescriptor.close()` for you when the stream is closed.
ParcelFileDescriptor.AutoCloseOutputStream	An OutputStream you can create on a ParcelFileDescriptor, which will take care of calling `ParcelFileDescriptor.close()` for you when the stream is closed.
ParcelFileDescriptor.FileDescriptorDetachedException	Exception that indicates that the file descriptor was detached.
ParcelFileDescriptor.OnCloseListener	Callback indicating that a ParcelFileDescriptor has been closed.
ParcelFormatException	The contents of a Parcel (usually during unmarshalling) does not contain the expected data.
ParcelUuid	This class is a Parcelable wrapper around `UUID` which is an immutable representation of a 128-bit universally unique identifier.
ParseException	Thrown when parsing a URL fails.
ParseException	Thrown when the string being parsed is not in the correct form.
ParseException	Indicates a parse error.
ParsePosition	Tracks the current position in a parsed string.
Parser	This interface was deprecated in API level 1. This interface has been replaced by the SAX2 `XMLReader` interface, which includes Namespace support.
ParserAdapter	Adapt a SAX1 Parser as a SAX2 XMLReader.
ParserConfigurationException	Indicates a serious configuration error.
ParserCursor	This class represents a context of a parsing operation: the current position the parsing operation is expected to start at the bounds limiting the scope of the parsing operation
ParserFactory	This class was deprecated in API level 1. This class works with the deprecated `Parser` interface.
PasswordAuthentication	This immutable class is a data structure that encapsulates username and password which is used by the `Authenticator` class.
PasswordCallback	Used in conjunction with a `CallbackHandler` to retrieve a password when needed.
PasswordTransformationMethod
Path	The Path class encapsulates compound (multiple contour) geometric paths consisting of straight line segments, quadratic curves, and cubic curves.
Path.Direction	Specifies how closed shapes (e.g.
Path.FillType	Enum for the ways a path may be filled.
Path.Op	The logical operations that can be performed when combining two paths.
PathClassLoader	Provides a simple `ClassLoader` implementation that operates on a list of files and directories in the local file system, but does not attempt to load classes from the network.
PathDashPathEffect
PathDashPathEffect.Style
PathEffect	PathEffect is the base class for objects in the Paint that affect the geometry of a drawing primitive before it is transformed by the canvas' matrix and drawn.
PathMeasure
PathPermission	Description of permissions needed to access a particular path in a `ProviderInfo` .
PathShape	Creates geometric paths, utilizing the `Path` class.
Pattern	Patterns are compiled regular expressions.
PatternMatcher	A simple pattern matcher, which is safe to use on untrusted data: it does not provide full reg-exp support, only simple globbing that can not be used maliciously.
Patterns	Commonly used regular expression patterns.
PatternSyntaxException	Encapsulates a syntax error that occurred during the compilation of a `Pattern` .
PBEKey	The interface to a password-based-encryption key.
PBEKeySpec	The key specification for a password based encryption key.
PBEParameterSpec	The algorithm parameter specification for a password based encryption algorithm.
PdfDocument	This class enables generating a PDF document from native Android content.
PdfDocument.Page	This class represents a PDF document page.
PdfDocument.PageInfo	This class represents meta-data that describes a PDF `PdfDocument.Page` .
PdfDocument.PageInfo.Builder	Builder for creating a `PdfDocument.PageInfo` .
PendingIntent	A description of an Intent and target action to perform with it.
PendingIntent.CanceledException	Exception thrown when trying to send through a PendingIntent that has been canceled or is otherwise no longer able to execute the request.
PendingIntent.OnFinished	Callback interface for discovering when a send operation has completed.
PerformanceTestCase	More complex interface performance for test cases.
PerformanceTestCase.Intermediates	Callbacks for `PerformanceTestCase` .
PeriodicSync	Value type that contains information about a periodic sync.
Permission	Legacy security code; do not use.
Permission	Legacy security code; do not use.
PermissionCollection	Legacy security code; do not use.
PermissionGroupInfo	Information you can retrieve about a particular security permission group known to the system.
PermissionInfo	Information you can retrieve about a particular security permission known to the system.
Permissions	Legacy security code; do not use.
PhantomReference <T>	Implements a phantom reference, which is the weakest of the three types of references.
PhoneNumberFormattingTextWatcher	Watches a `TextView` and if a phone number is entered will format it.
PhoneNumberUtils	Various utilities for dealing with phone number strings.
PhoneStateListener	A listener class for monitoring changes in specific telephony states on the device, including service state, signal strength, message waiting indicator (voicemail), and others.
Picture	A Picture records drawing calls (via the canvas returned by beginRecording) and can then play them back into Canvas (via `draw(Canvas)` or `drawPicture(Picture)` ).For most content (e.g.
PictureDrawable	Drawable subclass that wraps a Picture, allowing the picture to be used whereever a Drawable is supported.
Pipe	A pipe contains two channels, forming a unidirectional pipe.
Pipe.SinkChannel	Writable sink channel used to write to a pipe.
Pipe.SourceChannel	Readable source channel used to read from a pipe.
PipedInputStream	Receives information from a communications pipe.
PipedOutputStream	Places information on a communications pipe.
PipedReader	Receives information on a communications pipe.
PipedWriter	Places information on a communications pipe.
PixelFormat
PixelXorXfermode	PixelXorXfermode implements a simple pixel xor (op ^ src ^ dst).
PKCS8EncodedKeySpec	The key specification for an encoded private key in ASN.1 format as defined in the PKCS#8 standard.
PKIXBuilderParameters	The parameter specification for a PKIX `CertPathBuilder` algorithm used to `build` certificate chains validated with the PKIX certification path validation.
PKIXCertPathBuilderResult	The result of the PKIX certification path builder, returned by `build(CertPathParameters)` .
PKIXCertPathChecker	The class specifying the interface to extend the certification path validation algorithm by checks to perform on an `X509Certificate` .
PKIXCertPathValidatorResult	The implementation of the result of the PKIX certification path validation.
PKIXParameters	This class implements the parameters for the `PKIX CertPathValidator` .
PlainSocketFactory	The default class for creating sockets.
PluginStub	This interface is used to implement plugins in a WebView.
PluralsRes	Denotes that an integer parameter, field or method return value is expected to be a plurals resource reference.
Point	Point holds two integer coordinates
PointF	PointF holds two float coordinates
Policy	Legacy security code; do not use.
Policy.Parameters	Legacy security code; do not use.
PolicyNode	The interface to a valid policy tree node for the PKIX certification path validation algorithm.
PolicyQualifierInfo	This class implements a policy qualifier as defined by the ASN.1 `PolicyQualifierInfo` structure.
PolicySpi	Represents the Service Provider Interface (SPI) for java.security.Policy class.
PooledConnection	An interface which provides facilities for handling connections to a database which are pooled.
PoolEntryRequest	Encapsulates a request for a `BasicPoolEntry` .
Pools	Helper class for crating pools of objects.
Pools.Pool <T>	Interface for managing a pool of objects.
Pools.SimplePool <T>	Simple (non-synchronized) pool of objects.
Pools.SynchronizedPool <T>	Synchronized) pool of objects.
PopupMenu	Static library support version of the framework's `PopupMenu` .
PopupMenu	A PopupMenu displays a `Menu` in a modal popup window anchored to a `View` .
PopupMenu.OnDismissListener	Callback interface used to notify the application that the menu has closed.
PopupMenu.OnDismissListener	Callback interface used to notify the application that the menu has closed.
PopupMenu.OnMenuItemClickListener	Interface responsible for receiving menu item click events if the items themselves do not have individual item click listeners.
PopupMenu.OnMenuItemClickListener	Interface responsible for receiving menu item click events if the items themselves do not have individual item click listeners.
PopupMenuCompat	Helper for accessing features in PopupMenu introduced after API level 4 in a backwards compatible fashion.
PopupWindow	A popup window that can be used to display an arbitrary view.
PopupWindow.OnDismissListener	Listener that is called when this popup window is dismissed.
PorterDuff
PorterDuff.Mode
PorterDuffColorFilter
PorterDuffXfermode
PortUnreachableException	This `PortUnreachableException` will be thrown if an `ICMP_Port_Unreachable` message has been received.
PowerManager	This class gives you control of the power state of the device.
PowerManager.WakeLock	A wake lock is a mechanism to indicate that your application needs to have the device stay on.
Prediction
Preference	Represents the basic Preference UI building block displayed by a `PreferenceActivity` in the form of a `ListView` .
Preference.BaseSavedState	A base class for managing the instance state of a `Preference` .
Preference.OnPreferenceChangeListener	Interface definition for a callback to be invoked when the value of this `Preference` has been changed by the user and is about to be set and/or persisted.
Preference.OnPreferenceClickListener	Interface definition for a callback to be invoked when a `Preference` is clicked.
PreferenceActivity	This is the base class for an activity to show a hierarchy of preferences to the user.
PreferenceActivity.Header	Description of a single Header item that the user can select.
PreferenceCategory	Used to group `Preference` objects and provide a disabled title above the group.
PreferenceChangeEvent	This is the event class to indicate that a preference has been added, deleted or updated.
PreferenceChangeListener	This interface is used to handle preferences change events.
PreferenceFragment	Shows a hierarchy of `Preference` objects as lists.
PreferenceFragment.OnPreferenceStartFragmentCallback	Interface that PreferenceFragment's containing activity should implement to be able to process preference items that wish to switch to a new fragment.
PreferenceGroup	A container for multiple `Preference` objects.
PreferenceManager	Used to help create `Preference` hierarchies from activities or XML.
PreferenceManager.OnActivityDestroyListener	Interface definition for a class that will be called when the container's activity is destroyed.
PreferenceManager.OnActivityResultListener	Interface definition for a class that will be called when the container's activity receives an activity result.
PreferenceManager.OnActivityStopListener	Interface definition for a class that will be called when the container's activity is stopped.
Preferences	An instance of the class `Preferences` represents one node in a preference tree, which provides a mechanism to store and access configuration data in a hierarchical way.
PreferenceScreen	Represents a top-level `Preference` that is the root of a Preference hierarchy.
PreferencesFactory	This interface is used by the `Preferences` class as factory class to create `Preferences` instances.
PreparedStatement	An interface for a precompiled SQL Statement.
Presentation	Base class for presentations.
PresetReverb	A sound generated within a room travels in many directions.
PresetReverb.OnParameterChangeListener	The OnParameterChangeListener interface defines a method called by the PresetReverb when a parameter value has changed.
PresetReverb.Settings	The Settings class regroups all preset reverb parameters.
Principal	`Principal` s are objects which have identities.
PrintAttributes	This class represents the attributes of a print job.
PrintAttributes.Builder	Builder for creating `PrintAttributes` .
PrintAttributes.Margins	This class specifies content margins.
PrintAttributes.MediaSize	This class specifies a supported media size.
PrintAttributes.Resolution	This class specifies a supported resolution in DPI (dots per inch).
PrintDocument	This class represents a printed document from the perspective of a print service.
PrintDocumentAdapter	Base class that provides the content of a document to be printed.
PrintDocumentAdapter.LayoutResultCallback	Base class for implementing a callback for the result of `onLayout(PrintAttributes, PrintAttributes, CancellationSignal, LayoutResultCallback, Bundle)` .
PrintDocumentAdapter.WriteResultCallback	Base class for implementing a callback for the result of `onWrite(PageRange[], ParcelFileDescriptor, CancellationSignal, WriteResultCallback)` .
PrintDocumentInfo	This class encapsulates information about a document for printing purposes.
PrintDocumentInfo.Builder	Builder for creating a `PrintDocumentInfo` .
PrintedPdfDocument	This class is a helper for creating a PDF file for given print attributes.
Printer	Simple interface for printing text, allowing redirection to various targets.
PrinterCapabilitiesInfo	This class represents the capabilities of a printer.
PrinterCapabilitiesInfo.Builder	Builder for creating of a `PrinterCapabilitiesInfo` .
PrinterDiscoverySession	This class encapsulates the interaction between a print service and the system during printer discovery.
PrinterId	This class represents the unique id of a printer.
PrinterInfo	This class represents the description of a printer.
PrinterInfo.Builder	Builder for creating of a `PrinterInfo` .
PrintHelper	Helper for printing bitmaps.
PrintJob	This class represents a print job from the perspective of an application.
PrintJob	This class represents a print job from the perspective of a print service.
PrintJobId	This class represents the id of a print job.
PrintJobInfo	This class represents the description of a print job.
PrintJobInfo.Builder	Builder for creating a `PrintJobInfo` .
PrintManager	System level service for accessing the printing capabilities of the platform.
PrintService	This is the base class for implementing print services.
PrintStream	Wraps an existing `OutputStream` and provides convenience methods for writing common data types in a human readable format.
PrintStreamPrinter	Implementation of a `Printer` that sends its output to a `PrintStream` .
PrintWriter	Wraps either an existing `OutputStream` or an existing `Writer` and provides convenience methods for printing common data types in a human readable format.
PrintWriterPrinter	Implementation of a `Printer` that sends its output to a `PrintWriter` .
PriorityBlockingQueue <E>	An unbounded `blocking queue` that uses the same ordering rules as class `PriorityQueue` and supplies blocking retrieval operations.
PriorityQueue <E>	A PriorityQueue holds elements on a priority heap, which orders the elements according to their natural order or according to the comparator specified at construction time.
PrivateCredentialPermission	Legacy security code; do not use.
PrivateKey	`PrivateKey` is the common interface for private keys.
PrivilegedAction <T>	Legacy security code; do not use.
PrivilegedActionException	Legacy security code; do not use.
PrivilegedExceptionAction <T>	Legacy security code; do not use.
Process	Tools for managing OS processes.
Process	Represents an external process.
ProcessBuilder	Creates operating system processes.
ProcessedData	An entity class that wraps the result of a `processDrmInfo()` transaction between a device and a DRM server.
ProcessingInstruction	The `ProcessingInstruction` interface represents a "processing instruction", used in XML as a way to keep processor-specific information in the text of the document.
ProgressBar	Visual indicator of progress in some operation.
ProgressDialog	A dialog showing a progress indicator and an optional text message or view.
Properties	A `Properties` object is a `Hashtable` where the keys and values must be `String` s.
Property <T, V>	A property is an abstraction that can be used to represent a mutable value that is held in a host object.
PropertyChangeEvent	An event that indicates that a constraint or a boundary of a property has changed.
PropertyChangeListener	A PropertyChangeListener can subscribe with a event source.
PropertyChangeListenerProxy	The implementation of this listener proxy just delegates the received events to its listener.
PropertyChangeSupport	Manages a list of listeners to be notified when a property changes.
PropertyPermission	Legacy security code; do not use.
PropertyResourceBundle	`PropertyResourceBundle` loads resources from an `InputStream` .
PropertyValuesHolder	This class holds information about a property and the values that that property should take on during an animation.
Protectable	A Protectable can be run and can throw a Throwable.
ProtectionDomain	Legacy security code; do not use.
ProtocolException	Signals that either a connection attempt to a socket of the wrong type, the application of an unsupported operation or that a general error in the underlying protocol has occurred.
ProtocolException	Signals that an HTTP protocol violation has occurred.
ProtocolVersion	Represents a protocol version, as specified in RFC 2616.
Provider	`Provider` is the abstract superclass for all security providers in the Java security infrastructure.
Provider.Service	`Service` represents a service in the Java Security infrastructure.
ProviderException	`ProviderException` is a general exception, thrown by security `Providers` .
ProviderInfo	Holds information about a specific `content provider` .
ProviderTestCase <T extends ContentProvider >	This class was deprecated in API level 3. this class extends InstrumentationTestCase but should extend AndroidTestCase. Use ProviderTestCase2, which corrects this problem, instead.
ProviderTestCase2 <T extends ContentProvider >	This test case class provides a framework for testing a single `ContentProvider` and for testing your app code with an isolated content provider.
Proxy	A convenience class for accessing the user and default proxy settings.
Proxy	`Proxy` defines methods for creating dynamic proxy classes and instances.
Proxy	This class represents proxy server settings.
Proxy.Type	`Enum` class for the proxy type.
ProxySelector	Selects the proxy server to use, if any, when connecting to a given URL.
ProxySelectorRoutePlanner	Default implementation of an `HttpRoutePlanner` .
PSource	The source of the label `L` as specified in PKCS #1 .
PSource.PSpecified	The explicit specification of the parameter `P` used in the source algorithm.
PSSParameterSpec	The parameter specification for the RSA-PSS Signature scheme.
PublicKey	`PublicKey` is the common interface for public keys.
PushbackInputStream	Wraps an existing `InputStream` and adds functionality to "push back" bytes that have been read, so that they can be read again.
PushbackReader	Wraps an existing `Reader` and adds functionality to "push back" characters that have been read, so that they can be read again.

Q

QName	`QName` represents a qualified name as defined in the XML specifications: XML Schema Part2: Datatypes specification , Namespaces in XML , Namespaces in XML Errata .
Queue <E>	A collection designed for holding elements prior to processing.
QuickContactBadge	Widget used to show an image with the standard QuickContact badge and on-click behavior.
QuoteSpan
QwertyKeyListener	This is the standard key listener for alphabetic input on qwerty keyboards.

R

R
R
R
R
R.anim
R.anim
R.anim
R.animator
R.array
R.attr
R.attr
R.attr
R.attr
R.bool
R.bool
R.bool
R.color
R.color
R.color
R.dimen
R.dimen
R.dimen
R.dimen
R.drawable
R.drawable
R.drawable
R.fraction
R.id
R.id
R.id
R.id
R.integer
R.integer
R.integer
R.interpolator
R.layout
R.layout
R.layout
R.menu
R.mipmap
R.plurals
R.raw
R.string
R.string
R.string
R.style
R.style
R.style
R.styleable
R.styleable
R.styleable
R.styleable
R.xml
RadialGradient
RadioButton	A radio button is a two-states button that can be either checked or unchecked.
RadioGroup	This class is used to create a multiple-exclusion scope for a set of radio buttons.
RadioGroup.LayoutParams	This set of layout parameters defaults the width and the height of the children to `WRAP_CONTENT` when they are not specified in the XML file.
RadioGroup.OnCheckedChangeListener	Interface definition for a callback to be invoked when the checked radio button changed in this group.
Random	This class provides methods that return pseudo-random values.
RandomAccess	RandomAccess is implemented by `List` implementations that support fast (usually constant time) random access.
RandomAccessFile	Allows reading from and writing to a file in a random-access manner.
Rasterizer
RasterizerSpan
Rating	A class to encapsulate rating information used as content metadata.
RatingBar	A RatingBar is an extension of SeekBar and ProgressBar that shows a rating in stars.
RatingBar.OnRatingBarChangeListener	A callback that notifies clients when the rating has been changed.
RawRes	Denotes that an integer parameter, field or method return value is expected to be a raw resource reference.
RC2ParameterSpec	The algorithm parameter specification for the RC2 algorithm.
RC5ParameterSpec	The algorithm parameter specification for the RC5 algorithm.
Readable	Represents a sequence of characters that can be incrementally read (copied) into a `CharBuffer` .
ReadableByteChannel	A `ReadableByteChannel` is a type of `Channel` that can read bytes.
Reader	The base class for all readers.
ReadOnlyBufferException	A `ReadOnlyBufferException` is thrown when some write operation is called on a read-only buffer.
ReadWriteLock	A `ReadWriteLock` maintains a pair of associated `locks` , one for read-only operations and one for writing.
ReasonPhraseCatalog	Interface for obtaining reason phrases for HTTP status codes.
ReceiverCallNotAllowedException	This exception is thrown from `registerReceiver(BroadcastReceiver, IntentFilter)` and `bindService(Intent, ServiceConnection, int)` when these methods are being used from an `BroadcastReceiver` component.
RecognitionListener	Used for receiving notifications from the SpeechRecognizer when the recognition related events occur.
RecognitionService	This class provides a base class for recognition service implementations.
RecognitionService.Callback	This class receives callbacks from the speech recognition service and forwards them to the user.
RecognizerIntent	Constants for supporting speech recognition through starting an `Intent`
RecognizerResultsIntent	Constants for intents related to showing speech recognition results.
RecoverySystem	RecoverySystem contains methods for interacting with the Android recovery system (the separate partition that can be used to install system updates, wipe user data, etc.)
RecoverySystem.ProgressListener	Interface definition for a callback to be invoked regularly as verification proceeds.
Rect	Rect holds four integer coordinates for a rectangle.
RectEvaluator	This evaluator can be used to perform type interpolation between `Rect` values.
RectF	RectF holds four float coordinates for a rectangle.
RectShape	Defines a rectangle shape.
RedirectException	Signals violation of HTTP specification caused by an invalid redirect
RedirectHandler	A handler for determining if an HTTP request should be redirected to a new location in response to an HTTP response received from the target server.
RedirectLocations	A collection of URIs that were used as redirects.
ReentrantLock	A reentrant mutual exclusion `Lock` with the same basic behavior and semantics as the implicit monitor lock accessed using `synchronized` methods and statements, but with extended capabilities.
ReentrantReadWriteLock	An implementation of `ReadWriteLock` supporting similar semantics to `ReentrantLock` .
ReentrantReadWriteLock.ReadLock	The lock returned by method `readLock()` .
ReentrantReadWriteLock.WriteLock	The lock returned by method `writeLock()` .
Ref	This interface represents an SQL Ref - a data object containing a cursor or pointer to a result table.
Reference <T>	Provides an abstract class which describes behavior common to all reference objects.
ReferenceQueue <T>	The `ReferenceQueue` is the container on which reference objects are enqueued when the garbage collector detects the reachability type specified for the referent.
ReflectiveOperationException	Superclass of exceptions related to reflection.
ReflectPermission	Legacy security code; do not use.
RefQueueHandler	Callback handler for `RefQueueWorker` .
RefQueueWorker	A worker thread for processing queued references.
Region
Region.Op
RegionIterator
RejectedExecutionException	Exception thrown by an `Executor` when a task cannot be accepted for execution.
RejectedExecutionHandler	A handler for tasks that cannot be executed by a `ThreadPoolExecutor` .
RelativeLayout	A Layout where the positions of the children can be described in relation to each other or to the parent.
RelativeLayout.LayoutParams	Per-child layout information associated with RelativeLayout.
RelativeSizeSpan
RemoteCallbackList <E extends IInterface >	Takes care of the grunt work of maintaining a list of remote interfaces, typically for the use of performing callbacks from a `Service` to its clients.
RemoteControlClient	RemoteControlClient enables exposing information meant to be consumed by remote controls capable of displaying metadata, artwork and media transport control buttons.
RemoteControlClient.MetadataEditor	Class used to modify metadata in a `RemoteControlClient` object.
RemoteControlClient.OnGetPlaybackPositionListener	Interface definition for a callback to be invoked when the media playback position is queried.
RemoteControlClient.OnMetadataUpdateListener	Interface definition for a callback to be invoked when one of the metadata values has been updated.
RemoteControlClient.OnPlaybackPositionUpdateListener	Interface definition for a callback to be invoked when the media playback position is requested to be updated.
RemoteController	The RemoteController class is used to control media playback, display and update media metadata and playback status, published by applications using the `RemoteControlClient` class.
RemoteController.MetadataEditor	A class to read the metadata published by a `RemoteControlClient` , or send a `RemoteControlClient` new values for keys that can be edited.
RemoteController.OnClientUpdateListener	Interface definition for the callbacks to be invoked whenever media events, metadata and playback status are available.
RemoteException	Parent exception for all Binder remote-invocation errors
RemoteInput	A `RemoteInput` object specifies input to be collected from a user to be passed along with an intent inside a `PendingIntent` that is sent.
RemoteInput	Helper for using the `RemoteInput` API introduced after API level 4 in a backwards compatible fashion.
RemoteInput.Builder	Builder class for `RemoteInput` objects.
RemoteInput.Builder	Builder class for `RemoteInput` objects.
RemotePlaybackClient	A helper class for playing media on remote routes using the remote playback protocol defined by `MediaControlIntent` .
RemotePlaybackClient.ActionCallback	Base callback type for remote playback requests.
RemotePlaybackClient.ItemActionCallback	Callback for remote playback requests that operate on items.
RemotePlaybackClient.SessionActionCallback	Callback for remote playback requests that operate on sessions.
RemotePlaybackClient.StatusCallback	A callback that will receive media status updates.
RemoteViews	A class that describes a view hierarchy that can be displayed in another process.
RemoteViews.ActionException	Exception to send when something goes wrong executing an action
RemoteViews.RemoteView	This annotation indicates that a subclass of View is alllowed to be used with the `RemoteViews` mechanism.
RemoteViewsService	The service to be connected to for a remote adapter to request RemoteViews.
RemoteViewsService.RemoteViewsFactory	An interface for an adapter between a remote collection view (ListView, GridView, etc) and the underlying data for that view.
RenamingDelegatingContext	This is a class which delegates to the given context, but performs database and file operations with a renamed database/file name (prefixes default names with a given prefix).
RenderScript	This class provides access to a RenderScript context, which controls RenderScript initialization, resource management, and teardown.
RenderScript	This class provides access to a RenderScript context, which controls RenderScript initialization, resource management, and teardown.
RenderScript.ContextType	ContextType specifies the specific type of context to be created.
RenderScript.ContextType	ContextType specifies the specific type of context to be created.
RenderScript.Priority	RenderScript worker thread priority enumeration.
RenderScript.Priority	RenderScript worker thread priority enumeration.
RenderScript.RSErrorHandler	The runtime error handler base class.
RenderScript.RSErrorHandler	The runtime error handler base class.
RenderScript.RSMessageHandler	The base class from which an application should derive in order to receive RS messages from scripts.
RenderScript.RSMessageHandler	The base class from which an application should derive in order to receive RS messages from scripts.
ReplacementSpan
ReplacementTransformationMethod	This transformation method causes the characters in the `getOriginal()` array to be replaced by the corresponding characters in the `getReplacement()` array.
RequestAddCookies	Request interceptor that matches cookies available in the current `CookieStore` to the request being executed and generates corresponding cookierequest headers.
RequestConnControl	A request interceptor that suggests connection keep-alive to the server.
RequestContent	A request interceptor that decides about the transport encoding.
RequestDate	A request interceptor that adds a Date header.
RequestDefaultHeaders	Request interceptor that adds default request headers.
RequestDirector	A client-side request director.
RequestExpectContinue	A request interceptor that enables the expect-continue handshake.
RequestLine	The first line of an `HttpRequest` .
RequestProxyAuthentication
RequestTargetAuthentication
RequestTargetHost	A request interceptor that sets the Host header for HTTP/1.1 requests.
RequestUserAgent	A request interceptor that adds a User-Agent header.
RequestWrapper	A wrapper class for `HttpRequest` s that can be used to change properties of the current request without modifying the original object.
ResolveInfo	Information that is returned from resolving an intent against an IntentFilter.
ResolveInfo.DisplayNameComparator
ResourceBundle	`ResourceBundle` is an abstract class which is the superclass of classes which provide `Locale` -specific resources.
ResourceBundle.Control	ResourceBundle.Control is a static utility class defines ResourceBundle load access methods, its default access order is as the same as before.
ResourceBusyException	Exception thrown when an operation on a MediaDrm object is attempted and hardware resources are not available, due to being in use.
ResourceCursorAdapter	Static library support version of the framework's `ResourceCursorAdapter` .
ResourceCursorAdapter	An easy adapter that creates views defined in an XML file.
ResourceCursorTreeAdapter	A fairly simple ExpandableListAdapter that creates views defined in an XML file.
Resources	Class for accessing an application's resources.
Resources.NotFoundException	This exception is thrown by the resource APIs when a requested resource can not be found.
Resources.Theme	This class holds the current attribute values for a particular theme.
ResponseCache	Caches `URLConnection` responses.
ResponseConnControl	A response interceptor that suggests connection keep-alive to the client.
ResponseContent	A response interceptor that sets up entity-related headers.
ResponseDate	A response interceptor that adds a Date header.
ResponseHandler <T>	Handler that encapsulates the process of generating a response object from a `HttpResponse` .
ResponseProcessCookies	Response interceptor that populates the current `CookieStore` with data contained in response cookies received in the given the HTTP response.
ResponseServer	A response interceptor that adds a Server header.
RestoreObserver	Callback class for receiving progress reports during a restore operation.
RestrictionEntry	Applications can expose restrictions for a restricted user on a multiuser device.
Result	An object that implements this interface contains the information needed to build a transformation result tree.
ResultReceiver	Generic interface for receiving a callback result from someone.
ResultSet	An interface for an object which represents a database table entry, returned as the result of the query to the database.
ResultSetMetaData	Provides information about the columns returned in a `ResultSet` .
Retention	Defines a meta-annotation for determining the scope of retention for an annotation.
RetentionPolicy	Defines an enumeration for annotation retention policies.
RFC2109DomainHandler
RFC2109Spec	RFC 2109 compliant cookie policy
RFC2109SpecFactory
RFC2109VersionHandler
RFC2617Scheme	Abstract authentication scheme class that lays foundation for all RFC 2617 compliant authetication schemes and provides capabilities common to all authentication schemes defined in RFC 2617.
RFC2965CommentUrlAttributeHandler	`"CommantURL"` cookie attribute handler for RFC 2965 cookie spec.
RFC2965DiscardAttributeHandler	`"Discard"` cookie attribute handler for RFC 2965 cookie spec.
RFC2965DomainAttributeHandler	`"Domain"` cookie attribute handler for RFC 2965 cookie spec.
RFC2965PortAttributeHandler	`"Port"` cookie attribute handler for RFC 2965 cookie spec.
RFC2965Spec	RFC 2965 specific cookie management functions.
RFC2965SpecFactory
RFC2965VersionAttributeHandler	`"Version"` cookie attribute handler for RFC 2965 cookie spec.
Rfc822Token	This class stores an RFC 822-like name, address, and comment, and provides methods to convert them to quoted strings.
Rfc822Tokenizer	This class works as a Tokenizer for MultiAutoCompleteTextView for address list fields, and also provides a method for converting a string of addresses (such as might be typed into such a field) into a series of Rfc822Tokens.
Ringtone	Ringtone provides a quick method for playing a ringtone, notification, or other similar types of sounds.
RingtoneManager	RingtoneManager provides access to ringtones, notification, and other types of sounds.
RingtonePreference	A `Preference` that allows the user to choose a ringtone from those on the device.
RootElement	The root XML element.
RotateAnimation	An animation that controls the rotation of an object.
RotateDrawable	A Drawable that can rotate another Drawable based on the current level value.
RoundingMode	Specifies the rounding behavior for operations whose results cannot be represented exactly.
RoundRectShape	Creates a rounded-corner rectangle.
RoutedRequest	A request with the route along which it should be sent.
RouteInfo	Read-only interface for route information.
RouteInfo.LayerType	The layering type of a route.
RouteInfo.TunnelType	The tunnelling type of a route.
RouteSpecificPool	A connection sub-pool for a specific route, used by `ConnPoolByRoute` .
RouteTracker	Helps tracking the steps in establishing a route.
RowId	Maps SQL's ROWID type into Java.
RowIdLifetime	An enumeration to describe the life-time of RowID.
RowSet	An interface which provides means to access data which persists on a database.
RowSetEvent	An event which is sent when specific events happen to a `RowSet` object.
RowSetInternal	An interface provided by a `RowSet` object to let either a `RowSetReader` or a `RowSetWriter` access its internal state, thereby providing facilities to read and update the state of the `RowSet` .
RowSetListener	An interface used to send notification of events occurring in the context of a `RowSet` .
RowSetMetaData	An interface which provides facilities for getting information about the columns in a `RowSet` .
RowSetReader	An interface which provides functionality for a disconnected `RowSet` to get data from a database into its rows.
RowSetWriter	An interface which provides functionality for a disconnected `RowSet` to put data updates back to the data source from which the `RowSet` was originally populated.
RSAKey	The base interface for PKCS#1 RSA public and private keys.
RSAKeyGenParameterSpec	The parameter specification for generating an RSA key pair.
RSAMultiPrimePrivateCrtKey	The interface for a Multi-Prime RSA private key.
RSAMultiPrimePrivateCrtKeySpec	The key specification of a RSA multi-prime private key with the Chinese Remainder Theorem (CRT) information values used.
RSAOtherPrimeInfo	The additional prime information specified as triplet of primes, a prime exponent, and a Chinese Remainder Theorem (CRT) coefficient.
RSAPrivateCrtKey	The interface for a PKCS#1 RSA private key using CRT information values.
RSAPrivateCrtKeySpec	The key specification of a RSA private key using Chinese Remainder Theorem (CRT) values.
RSAPrivateKey	The interface for an PKCS#1 RSA private key.
RSAPrivateKeySpec	The key specification of a RSA private key.
RSAPublicKey	The interface for a PKCS#1 RSA public key.
RSAPublicKeySpec	The key specification of a RSA public key.
RSDriverException	Base class for all exceptions thrown by the Android RenderScript
RSDriverException	Base class for all exceptions thrown by the Android RenderScript
RSIllegalArgumentException	Base class for all exceptions thrown by the Android RenderScript
RSIllegalArgumentException	Base class for all exceptions thrown by the Android RenderScript
RSInvalidStateException	Base class for all exceptions thrown by the Android RenderScript
RSInvalidStateException	Base class for all exceptions thrown by the Android RenderScript
RSRuntimeException	Base class for all exceptions thrown by the Android RenderScript
RSRuntimeException	Base class for all exceptions thrown by the Android RenderScript
RtpStream	RtpStream represents the base class of streams which send and receive network packets with media payloads over Real-time Transport Protocol (RTP).
RuleBasedCollator	A concrete implementation class for `Collation` .
Runnable	Represents a command that can be executed.
RunnableFuture <V>	A `Future` that is `Runnable` .
RunnableScheduledFuture <V>	A `ScheduledFuture` that is `Runnable` .
Runtime	Allows Java applications to interface with the environment in which they are running.
RuntimeException	`RuntimeException` is the superclass of all classes that represent exceptional conditions which occur as a result of executing an application in the VM.
RuntimePermission	Legacy security code; do not use.

S

SafeVarargs	Claims to the compiler that the annotation target does nothing potentially unsafe to its varargs argument.
Sampler	Sampler object that defines how Allocations can be read as textures within a kernel.
Sampler	Sampler object that defines how Allocations can be read as textures within a kernel.
Sampler.Builder	Builder for creating non-standard samplers.
Sampler.Builder	Builder for creating non-standard samplers.
Sampler.Value
Sampler.Value
Savepoint	A savepoint is an instant during the current transaction that can be utilized by a rollback via the `rollback()` command.
SAXException	Encapsulate a general SAX error or warning.
SAXNotRecognizedException	Exception class for an unrecognized identifier.
SAXNotSupportedException	Exception class for an unsupported operation.
SAXParseException	Encapsulate an XML parse error or warning.
SAXParser	Defines the API that wraps an `XMLReader` implementation class.
SAXParserFactory	Defines a factory API that enables applications to configure and obtain a SAX based parser to parse XML documents.
SAXResult	Acts as an holder for a transformation Result.
SAXSource	Acts as an holder for SAX-style Source.
SAXTransformerFactory	This class extends TransformerFactory to provide SAX-specific factory methods.
ScaleAnimation	An animation that controls the scale of an object.
ScaleDrawable	A Drawable that changes the size of another Drawable based on its current level value.
ScaleGestureDetector	Detects scaling transformation gestures using the supplied `MotionEvent` s.
ScaleGestureDetector.OnScaleGestureListener	The listener for receiving notifications when gestures occur.
ScaleGestureDetector.SimpleOnScaleGestureListener	A convenience class to extend when you only want to listen for a subset of scaling-related events.
ScaleGestureDetectorCompat	Helper for accessing features in `ScaleGestureDetector` introduced after API level 19 (KitKat) in a backwards compatible fashion.
ScaleXSpan
Scanner	A parser that parses a text string of primitive types and strings with the help of regular expressions.
ScanResult	Describes information about a detected access point.
ScatteringByteChannel	The interface for channels that can read data into a set of buffers in a single operation.
Scene	A scene represents the collection of values that various properties in the View hierarchy will have when the scene is applied.
ScheduledExecutorService	An `ExecutorService` that can schedule commands to run after a given delay, or to execute periodically.
ScheduledFuture <V>	A delayed result-bearing action that can be cancelled.
ScheduledThreadPoolExecutor	A `ThreadPoolExecutor` that can additionally schedule commands to run after a given delay, or to execute periodically.
Schema	Immutable in-memory representation of grammar.
SchemaFactory	Factory that creates `Schema` objects. Entry-point to the validation API.
SchemaFactoryLoader	This class was removed from JAXP 1.3 before it was finalized but was mistakenly included in Java 5.
Scheme	Encapsulates specifics of a protocol scheme such as "http" or "https".
SchemeRegistry	A set of supported protocol `schemes` .
Script	The parent class for all executable scripts.
Script	The parent class for all executable scripts.
Script.Builder	Only intended for use by generated reflected code.
Script.Builder	Only intended for use by generated reflected code.
Script.FieldBase	Only intended for use by generated reflected code.
Script.FieldBase	Only intended for use by generated reflected code.
Script.FieldID	FieldID is an identifier for a Script + exported field pair.
Script.FieldID	FieldID is an identifier for a Script + exported field pair.
Script.KernelID	KernelID is an identifier for a Script + root function pair.
Script.KernelID	KernelID is an identifier for a Script + root function pair.
Script.LaunchOptions	Class used to specify clipping for a kernel launch.
Script.LaunchOptions	Class used to specify clipping for a kernel launch.
ScriptC	The superclass for all user-defined scripts.
ScriptC	The superclass for all user-defined scripts.
ScriptGroup	ScriptGroup creates a group of kernels that are executed together with one execution call as if they were a single kernel.
ScriptGroup	ScriptGroup creates a group of kernels that are executed together with one execution call as if they were a single kernel.
ScriptGroup.Builder	Helper class to build a ScriptGroup.
ScriptGroup.Builder	Helper class to build a ScriptGroup.
ScriptIntrinsic	Base class for all Intrinsic scripts.
ScriptIntrinsic	Base class for all Intrinsic scripts.
ScriptIntrinsic3DLUT	Intrinsic for converting RGB to RGBA by using a 3D lookup table.
ScriptIntrinsicBlend	Intrinsic kernels for blending two `Allocation` objects.
ScriptIntrinsicBlend	Intrinsic kernels for blending two `Allocation` objects.
ScriptIntrinsicBlur	Intrinsic Gausian blur filter.
ScriptIntrinsicBlur	Intrinsic Gausian blur filter.
ScriptIntrinsicColorMatrix	Intrinsic for applying a color matrix to allocations.
ScriptIntrinsicColorMatrix	Intrinsic for applying a color matrix to allocations.
ScriptIntrinsicConvolve3x3	Intrinsic for applying a 3x3 convolve to an allocation.
ScriptIntrinsicConvolve3x3	Intrinsic for applying a 3x3 convolve to an allocation.
ScriptIntrinsicConvolve5x5	Intrinsic for applying a 5x5 convolve to an allocation.
ScriptIntrinsicConvolve5x5	Intrinsic for applying a 5x5 convolve to an allocation.
ScriptIntrinsicHistogram	Intrinsic Histogram filter.
ScriptIntrinsicLUT	Intrinsic for applying a per-channel lookup table.
ScriptIntrinsicLUT	Intrinsic for applying a per-channel lookup table.
ScriptIntrinsicResize	Intrinsic for performing a resize of a 2D allocation.
ScriptIntrinsicYuvToRGB	Intrinsic for converting an Android YUV buffer to RGB.
ScriptIntrinsicYuvToRGB	Intrinsic for converting an Android YUV buffer to RGB.
ScriptIntrinsicYuvToRGBThunker
Scroller	This class encapsulates scrolling.
ScrollerCompat	Provides access to new `Scroller` APIs when available.
ScrollerCompatTestBase
ScrollingMovementMethod	A movement method that interprets movement keys by scrolling the text buffer.
ScrollView	Layout container for a view hierarchy that can be scrolled by the user, allowing it to be larger than the physical display.
SealedObject	A `SealedObject` is a wrapper around a `serializable` object instance and encrypts it using a cryptographic cipher.
SearchableInfo	Searchability meta-data for an activity.
SearchManager	This class provides access to the system search services.
SearchManager.OnCancelListener	See `setOnCancelListener(SearchManager.OnCancelListener)` for configuring your activity to monitor search UI state.
SearchManager.OnDismissListener	See `setOnDismissListener(SearchManager.OnDismissListener)` for configuring your activity to monitor search UI state.
SearchRecentSuggestions	This is a utility class providing access to `SearchRecentSuggestionsProvider` .
SearchRecentSuggestionsProvider	This superclass can be used to create a simple search suggestions provider for your application.
SearchView	A widget that provides a user interface for the user to enter a search query and submit a request to a search provider.
SearchView	A widget that provides a user interface for the user to enter a search query and submit a request to a search provider.
SearchView.OnCloseListener
SearchView.OnCloseListener
SearchView.OnQueryTextListener	Callbacks for changes to the query text.
SearchView.OnQueryTextListener	Callbacks for changes to the query text.
SearchView.OnSuggestionListener	Callback interface for selection events on suggestions.
SearchView.OnSuggestionListener	Callback interface for selection events on suggestions.
SearchViewCompat	Helper for accessing features in `SearchView` introduced after API level 4 in a backwards compatible fashion.
SearchViewCompat.OnCloseListenerCompat	Callback for closing the query UI.
SearchViewCompat.OnQueryTextListenerCompat	Callbacks for changes to the query text.
SecretKey	A cryptographic secret (symmetric) key.
SecretKeyFactory	The public API for `SecretKeyFactory` implementations.
SecretKeyFactorySpi	The Service Provider Interface ( SPI ) definition for the `SecretKeyFactory` class.
SecretKeySpec	A key specification for a `SecretKey` and also a secret key implementation that is provider-independent.
SectionIndexer	Interface that may implemented on `Adapter` s to enable fast scrolling between sections of an `AbsListView` .
SecureCacheResponse	A secure cache response represents data which is originally retrieved over a secure connection.
SecureClassLoader	`SecureClassLoader` represents a `ClassLoader` which associates the classes it loads with a code source and provide mechanisms to allow the relevant permissions to be retrieved.
SecureRandom	This class generates cryptographically secure pseudo-random numbers.
SecureRandomSpi	`SecureRandomSpi` is the Service Provider Interface ( SPI ) definition for `SecureRandom` .
Security	`Security` is the central class in the Java Security API.
SecurityException	Thrown when a security manager check fails.
SecurityManager	Legacy security code; do not use.
SecurityPermission	Legacy security code; do not use.
SeekBar	A SeekBar is an extension of ProgressBar that adds a draggable thumb.
SeekBar.OnSeekBarChangeListener	A callback that notifies clients when the progress level has been changed.
SelectableChannel	A channel that can be used with a `Selector` .
Selection	Utility class for manipulating cursors and selections in CharSequences.
SelectionKey	A `SelectionKey` represents the relationship between a channel and a selector for which the channel is registered.
Selector	A controller for the selection of `SelectableChannel` objects.
SelectorProvider	`SelectorProvider` is an abstract base class that declares methods for providing instances of `DatagramChannel` , `Pipe` , `Selector` , `ServerSocketChannel` , and `SocketChannel` .
Semaphore	A counting semaphore.
Sensor	Class representing a sensor.
SensorEvent	This class represents a `Sensor` event and holds informations such as the sensor's type, the time-stamp, accuracy and of course the sensor's `data` .
SensorEventListener	Used for receiving notifications from the SensorManager when sensor values have changed.
SensorEventListener2	Used for receiving a notification when a flush() has been successfully completed.
SensorListener	This interface was deprecated in API level 3. Use `SensorEventListener` instead.
SensorManager	SensorManager lets you access the device's `sensors` .
SentenceSuggestionsInfo	This class contains a metadata of suggestions returned from a text service (e.g.
SequenceInputStream	Concatenates two or more existing `InputStream` s.
Serializable	Marks classes that can be serialized by `ObjectOutputStream` and deserialized by `ObjectInputStream` .
SerializableEntity
SerializablePermission	Legacy security code; do not use.
ServerSocket	This class represents a server-side socket that waits for incoming client connections.
ServerSocketChannel	A `ServerSocketChannel` is a partial abstraction of a selectable, stream-oriented listening socket.
ServerSocketFactory	This abstract class defines methods to create server sockets.
Service	A Service is an application component representing either an application's desire to perform a longer-running operation while not interacting with the user or to supply functionality for other applications to use.
ServiceCompat	Helper for accessing features in `Service` introduced after API level 4 in a backwards compatible fashion.
ServiceConfigurationError	Thrown when a service provider can't be loaded by `ServiceLoader` .
ServiceConnection	Interface for monitoring the state of an application service.
ServiceInfo	Information you can retrieve about a particular application service.
ServiceLoader <S>	A service-provider loader.
ServiceState	Contains phone state and service related information.
ServiceTestCase <T extends Service >	This test case provides a framework in which you can test Service classes in a controlled environment.
SessionInputBuffer	Session input buffer for blocking connections.
SessionOutputBuffer	Session output buffer for blocking connections.
Set <E>	A `Set` is a data structure which does not allow duplicate elements.
SetCookie	This interface represents a `SetCookie` response header sent by the origin server to the HTTP agent in order to maintain a conversational state.
SetCookie2	This interface represents a `SetCookie2` response header sent by the origin server to the HTTP agent in order to maintain a conversational state.
SettingInjectorService	Dynamically specifies the summary (subtitle) and enabled status of a preference injected into the list of app settings displayed by the system settings app For use only by apps that are included in the system image, for preferences that affect multiple apps.
Settings	The Settings provider contains global system-level device preferences.
Settings.Global	Global system settings, containing preferences that always apply identically to all defined users.
Settings.NameValueTable	Common base for tables of name/value settings.
Settings.Secure	Secure system settings, containing system preferences that applications can read but are not allowed to write.
Settings.SettingNotFoundException
Settings.System	System settings, containing miscellaneous system preferences.
Shader	Shader is the based class for objects that return horizontal spans of colors during drawing.
Shader.TileMode
Shape	Defines a generic graphical "shape." Any Shape can be drawn to a Canvas with its own draw() method, but more graphical control is available if you instead pass it to a `ShapeDrawable` .
ShapeDrawable	A Drawable object that draws primitive shapes.
ShapeDrawable.ShaderFactory	Base class defines a factory object that is called each time the drawable is resized (has a new width or height).
ShareActionProvider	This is a provider for a share action.
ShareActionProvider	This is a provider for a share action.
ShareActionProvider.OnShareTargetSelectedListener	Listener for the event of selecting a share target.
ShareActionProvider.OnShareTargetSelectedListener	Listener for the event of selecting a share target.
ShareCompat	Extra helper functionality for sharing data between activities.
ShareCompat.IntentBuilder	IntentBuilder is a helper for constructing `ACTION_SEND` and `ACTION_SEND_MULTIPLE` sharing intents and starting activities to share content.
ShareCompat.IntentReader	IntentReader is a helper for reading the data contained within a sharing (ACTION_SEND) Intent.
SharedPreferences	Interface for accessing and modifying preference data returned by `getSharedPreferences(String, int)` .
SharedPreferences.Editor	Interface used for modifying values in a `SharedPreferences` object.
SharedPreferences.OnSharedPreferenceChangeListener	Interface definition for a callback to be invoked when a shared preference is changed.
SharedPreferencesBackupHelper	A helper class that can be used in conjunction with `BackupAgentHelper` to manage the backup of `SharedPreferences` .
Short	The wrapper for the primitive type `short` .
Short2	Vector version of the basic short type.
Short2	Class for exposing the native RenderScript Short2 type back to the Android system.
Short3	Vector version of the basic short type.
Short3	Class for exposing the native RenderScript short3 type back to the Android system.
Short4	Vector version of the basic short type.
Short4	Class for exposing the native RenderScript short4 type back to the Android system.
ShortBuffer	A buffer of shorts.
ShortBufferException	The exception that is thrown when the result of an operation is attempted to store in a user provided buffer that is too small.
SignalStrength	Contains phone signal strength related information.
Signature	Opaque, immutable representation of a signature associated with an application package.
Signature	`Signature` is an engine class which is capable of creating and verifying digital signatures, using different algorithms that have been registered with the `Security` class.
SignatureException	`SignatureException` is a general `Signature` exception.
SignatureSpi	`SignatureSpi` is the Service Provider Interface ( SPI ) definition for `Signature` .
SignedObject	A `SignedObject` instance acts as a container for another object.
Signer	This class was deprecated in API level 1. Use the `java.security.cert` package and `Principal` instead.
SimpleAdapter	An easy adapter to map static data to views defined in an XML file.
SimpleAdapter.ViewBinder	This class can be used by external clients of SimpleAdapter to bind values to views.
SimpleArrayMap <K, V>	Base implementation of `ArrayMap` that doesn't include any standard Java container API interoperability.
SimpleCursorAdapter	Static library support version of the framework's `SimpleCursorAdapter` .
SimpleCursorAdapter	An easy adapter to map columns from a cursor to TextViews or ImageViews defined in an XML file.
SimpleCursorAdapter.CursorToStringConverter	This class can be used by external clients of SimpleCursorAdapter to define how the Cursor should be converted to a String.
SimpleCursorAdapter.CursorToStringConverter	This class can be used by external clients of SimpleCursorAdapter to define how the Cursor should be converted to a String.
SimpleCursorAdapter.ViewBinder	This class can be used by external clients of SimpleCursorAdapter to bind values fom the Cursor to views.
SimpleCursorAdapter.ViewBinder	This class can be used by external clients of SimpleCursorAdapter to bind values fom the Cursor to views.
SimpleCursorTreeAdapter	An easy adapter to map columns from a cursor to TextViews or ImageViews defined in an XML file.
SimpleCursorTreeAdapter.ViewBinder	This class can be used by external clients of SimpleCursorTreeAdapter to bind values from the Cursor to views.
SimpleDateFormat	Formats and parses dates in a locale-sensitive manner.
SimpleExpandableListAdapter	An easy adapter to map static data to group and child views defined in an XML file.
SimpleFormatter	`SimpleFormatter` can be used to print a summary of the information contained in a `LogRecord` object in a human readable format.
SimpleTimeZone	`SimpleTimeZone` is a concrete subclass of `TimeZone` that represents a time zone for use with a Gregorian calendar.
SingleClientConnManager	A connection "manager" for a single connection.
SingleClientConnManager.ConnAdapter	The connection adapter used by this manager.
SingleClientConnManager.PoolEntry	The pool entry for this connection manager.
SingleLaunchActivityTestCase <T extends Activity >	If you would like to test a single activity with an `InstrumentationTestCase` , this provides some of the boiler plate to launch and finish the activity in `setUp()` and `tearDown()` .
SingleLineTransformationMethod	This transformation method causes any newline characters (\n) to be displayed as spaces instead of causing line breaks, and causes carriage return characters (\r) to have no appearance.
SipAudioCall	Handles an Internet audio call over SIP.
SipAudioCall.Listener	Listener for events relating to a SIP call, such as when a call is being recieved ("on ringing") or a call is outgoing ("on calling").
SipErrorCode	Defines error codes returned during SIP actions.
SipException	Indicates a general SIP-related exception.
SipManager	Provides APIs for SIP tasks, such as initiating SIP connections, and provides access to related SIP services.
SipProfile	Defines a SIP profile, including a SIP account, domain and server information.
SipProfile.Builder	Helper class for creating a `SipProfile` .
SipRegistrationListener	Listener for SIP registration events.
SipSession	Represents a SIP session that is associated with a SIP dialog or a standalone transaction not within a dialog.
SipSession.Listener	Listener for events relating to a SIP session, such as when a session is being registered ("on registering") or a call is outgoing ("on calling").
SipSession.State	Defines SIP session states, such as "registering", "outgoing call", and "in call".
SlidingDrawer	This class was deprecated in API level 17. This class is not supported anymore. It is recommended you base your own implementation on the source code for the Android Open Source Project if you must use it in your application.
SlidingDrawer.OnDrawerCloseListener	Callback invoked when the drawer is closed.
SlidingDrawer.OnDrawerOpenListener	Callback invoked when the drawer is opened.
SlidingDrawer.OnDrawerScrollListener	Callback invoked when the drawer is scrolled.
SlidingPaneLayout	SlidingPaneLayout provides a horizontal, multi-pane layout for use at the top level of a UI.
SlidingPaneLayout.LayoutParams
SlidingPaneLayout.PanelSlideListener	Listener for monitoring events about sliding panes.
SlidingPaneLayout.SimplePanelSlideListener	No-op stubs for `SlidingPaneLayout.PanelSlideListener` .
SM	Constants and static helpers related to the HTTP state management.
SmallTest	Marks a test that should run as part of the small tests.
Smoke	Marks a test that should run as part of the smoke tests.
SmsManager	Manages SMS operations such as sending data, text, and pdu SMS messages.
SmsManager	This class was deprecated in API level 4. Replaced by android.telephony.SmsManager that supports both GSM and CDMA.
SmsMessage	A Short Message Service message.
SmsMessage	This class was deprecated in API level 4. Replaced by android.telephony.SmsMessage that supports both GSM and CDMA.
SmsMessage.MessageClass	SMS Class enumeration.
SmsMessage.MessageClass	This enum was deprecated in API level 4. Use android.telephony.SmsMessage.
SmsMessage.SubmitPdu
SmsMessage.SubmitPdu	This class was deprecated in API level 4. Use android.telephony.SmsMessage.
Socket	Provides a client-side TCP socket.
SocketAddress	This abstract class represents a protocol-independent base for socket-endpoint representing classes.
SocketChannel	A `SocketChannel` is a selectable channel that provides a partial abstraction of stream connecting socket.
SocketException	This `SocketException` may be thrown during socket creation or setting options, and is the superclass of all other socket related exceptions.
SocketFactory	This abstract class defines methods to create sockets.
SocketFactory	A factory for creating and connecting sockets.
SocketHandler	A handler that writes log messages to a socket connection.
SocketHttpClientConnection	Implementation of a client-side HTTP connection that can be bound to a network Socket in order to receive and transmit data.
SocketHttpServerConnection	Implementation of a server-side HTTP connection that can be bound to a network Socket in order to receive and transmit data.
SocketImpl	This class is the base of all streaming socket implementation classes.
SocketImplFactory	This interface defines a factory for socket implementations.
SocketInputBuffer	`Socket` bound session input buffer.
SocketOptions	Defines an interface for socket implementations to get and set socket options.
SocketOutputBuffer	`Socket` bound session output buffer.
SocketPermission	Legacy security code; do not use.
SocketTimeoutException	This exception is thrown when a timeout expired on a socket `read` or `accept` operation.
SoftReference <T>	A reference that is cleared when its referent is not strongly reachable and there is memory pressure.
SortedMap <K, V>	A map that has its keys ordered.
SortedSet <E>	SortedSet is a Set which iterates over its elements in a sorted order.
SoundEffectConstants	Constants to be used to play sound effects via `playSoundEffect(int)`
SoundPool	The SoundPool class manages and plays audio resources for applications.
SoundPool.OnLoadCompleteListener
Source	An object that implements this interface contains the information needed to act as source input (XML source or transformation instructions).
SourceLocator	This interface is primarily for the purposes of reporting where an error occurred in the XML source or transformation instructions.
Space	Space is a lightweight View subclass that may be used to create gaps between components in general purpose layouts.
Space	Space is a lightweight View subclass that may be used to create gaps between components in general purpose layouts.
Spannable	This is the interface for text to which markup objects can be attached and detached.
Spannable.Factory	Factory used by TextView to create new Spannables.
SpannableString	This is the class for text whose content is immutable but to which markup objects can be attached and detached.
SpannableStringBuilder	This is the class for text whose content and markup can both be changed.
Spanned	This is the interface for text that has markup objects attached to ranges of it.
SpannedString	This is the class for text whose content and markup are immutable.
SpanWatcher	When an object of this type is attached to a Spannable, its methods will be called to notify it that other markup objects have been added, changed, or removed.
SparseArray <E>	SparseArrays map integers to Objects.
SparseArrayCompat <E>	A copy of the current platform (currently `KITKAT` version of `SparseArray` ; provides a removeAt() method and other things.
SparseBooleanArray	SparseBooleanArrays map integers to booleans.
SparseIntArray	SparseIntArrays map integers to integers.
SparseLongArray	SparseLongArrays map integers to longs.
SpeechRecognizer	This class provides access to the speech recognition service.
SpellCheckerInfo	This class is used to specify meta information of a spell checker.
SpellCheckerService	SpellCheckerService provides an abstract base class for a spell checker.
SpellCheckerService.Session	This abstract class should be overridden by a concrete implementation of a spell checker.
SpellCheckerSession	The SpellCheckerSession interface provides the per client functionality of SpellCheckerService.
SpellCheckerSession.SpellCheckerSessionListener	Callback for getting results from text services
SpellCheckerSubtype	This class is used to specify meta information of a subtype contained in a spell checker.
Spinner	A view that displays one child at a time and lets the user pick among them.
SpinnerAdapter	Extended `Adapter` that is the bridge between a `Spinner` and its data.
SQLClientInfoException	An exception, which is subclass of SQLException, is thrown when one or more client info properties could not be set on a Connection.
SQLData	An interface for the custom mapping of an SQL User Defined Type (UDT) to a Java class.
SQLDataException	An exception, which is subclass of SQLException, is thrown when various data errors arise.
SQLException	An exception that indicates there was an error with SQL parsing or execution.
SQLException	An exception that indicates a failed JDBC operation.
SQLFeatureNotSupportedException	An exception, which is subclass of SQLNonTransientException, is thrown when various the JDBC driver does not support an optional JDBC feature.
SQLInput	The `SQLInput` interface defines operations which apply to a type of input stream which carries a series of values representing an instance of an SQL structured type or SQL distinct type.
SQLIntegrityConstraintViolationException	An exception, which is subclass of SQLNonTransientException, is thrown when various the an integrity constraint (foreign key, primary key or unique key) has been violated.
SQLInvalidAuthorizationSpecException	An exception, which is subclass of SQLNonTransientException, is thrown when the authorization credentials presented during connection establishment are not valid.
SQLiteAbortException	An exception that indicates that the SQLite program was aborted.
SQLiteAccessPermException	This exception class is used when sqlite can't access the database file due to lack of permissions on the file.
SQLiteBindOrColumnIndexOutOfRangeException	Thrown if the the bind or column parameter index is out of range
SQLiteBlobTooBigException
SQLiteCantOpenDatabaseException
SQLiteClosable	An object created from a SQLiteDatabase that can be closed.
SQLiteConstraintException	An exception that indicates that an integrity constraint was violated.
SQLiteCursor	A Cursor implementation that exposes results from a query on a `SQLiteDatabase` .
SQLiteCursorDriver	A driver for SQLiteCursors that is used to create them and gets notified by the cursors it creates on significant events in their lifetimes.
SQLiteDatabase	Exposes methods to manage a SQLite database.
SQLiteDatabase.CursorFactory	Used to allow returning sub-classes of `Cursor` when calling query.
SQLiteDatabaseCorruptException	An exception that indicates that the SQLite database file is corrupt.
SQLiteDatabaseLockedException	Thrown if the database engine was unable to acquire the database locks it needs to do its job.
SQLiteDatatypeMismatchException
SQLiteDiskIOException	An exception that indicates that an IO error occured while accessing the SQLite database file.
SQLiteDoneException	An exception that indicates that the SQLite program is done.
SQLiteException	A SQLite exception that indicates there was an error with SQL parsing or execution.
SQLiteFullException	An exception that indicates that the SQLite database is full.
SQLiteMisuseException	This error can occur if the application creates a SQLiteStatement object and allows multiple threads in the application use it at the same time.
SQLiteOpenHelper	A helper class to manage database creation and version management.
SQLiteOutOfMemoryException
SQLiteProgram	A base class for compiled SQLite programs.
SQLiteQuery	Represents a query that reads the resulting rows into a `SQLiteQuery` .
SQLiteQueryBuilder	This is a convience class that helps build SQL queries to be sent to `SQLiteDatabase` objects.
SQLiteReadOnlyDatabaseException
SQLiteStatement	Represents a statement that can be executed against a database.
SQLiteTableLockedException
SQLiteTransactionListener	A listener for transaction events.
SQLNonTransientConnectionException	An exception, which is subclass of SQLException, is thrown when the connection operation that failed will not succeed when the operation is retried without the cause of the failure being corrected.
SQLNonTransientException
SQLOutput	The interface for an output stream used to write attributes of an SQL User Defined Type (UDT) to the database.
SQLPermission	Legacy security code; do not use.
SQLRecoverableException
SQLSyntaxErrorException
SQLTimeoutException
SQLTransactionRollbackException
SQLTransientConnectionException
SQLTransientException
SQLWarning	An exception class that holds information about Database access warnings.
SQLXML	Maps SQL's XML type into Java.
SslCertificate	SSL certificate info (certificate details) class
SslCertificate.DName	A distinguished name helper class: a 3-tuple of: the most specific common name (CN) the most specific organization (O) the most specific organizational unit (OU)
SSLCertificateSocketFactory	SSLSocketFactory implementation with several extra features: Timeout specification for SSL handshake operations Hostname verification in most cases (see WARNINGs below) Optional SSL session caching with `SSLSessionCache` Optionally bypass all SSL certificate checks The handshake timeout does not apply to actual TCP socket connection.
SSLContext	The public API for secure socket protocol implementations.
SSLContextSpi	The Service Provider Interface (SPI) for the `SSLContext` class.
SSLEngine	The abstract implementation of secure communications using SSL, TLS, or other protocols.
SSLEngineResult	The result object describing the state of the `SSLEngine` produced by the `wrap()` and `unwrap()` operations.
SSLEngineResult.HandshakeStatus	The `enum` describing the state of the current handshake.
SSLEngineResult.Status	The `enum` describing the result of the `SSLEngine` operation.
SslError	This class represents a set of one or more SSL errors and the associated SSL certificate.
SslErrorHandler	Represents a request for handling an SSL error.
SSLException	The base class for all SSL related exceptions.
SSLHandshakeException	The exception that is thrown when a handshake could not be completed successfully.
SSLKeyException	The exception that is thrown when an invalid SSL key is encountered.
SSLParameters	SSL handshake parameters that include protocols, cipher suites, and client authentication requirements.
SSLPeerUnverifiedException	The exception that is thrown when the identity of a peer has not been verified.
SSLPermission	Legacy security code; do not use.
SSLProtocolException	The exception that is thrown when an error in the operation of the SSL protocol is encountered.
SSLServerSocket	The extension of `ServerSocket` which provides secure server sockets based on protocols like SSL, TLS, or others.
SSLServerSocketFactory	The factory for SSL server sockets.
SSLSession	The interface representing an SSL session.
SSLSessionBindingEvent	The event sent to an `SSLSessionBindingListener` when the listener object is bound ( `putValue(String, Object)` ) or unbound ( `removeValue(String)` ) to an `SSLSession` .
SSLSessionBindingListener	The interface to be implemented by any object that requires notification when data objects are bound to (or unbound from) an `SSLSession` .
SSLSessionCache	File-based cache of established SSL sessions.
SSLSessionContext	A collection of `SSLSession` s.
SSLSocket	The extension of `Socket` providing secure protocols like SSL (Secure Sockets Layer) or TLS (Transport Layer Security).
SSLSocketFactory	The abstract factory implementation to create `SSLSocket` s.
SSLSocketFactory	Layered socket factory for TLS/SSL connections, based on JSSE.
Stack <E>	`Stack` is a Last-In/First-Out(LIFO) data structure which represents a stack of objects.
StackOverflowError	Thrown when the depth of the stack of the running program exceeds some platform or VM specific limit.
StackTraceElement	A representation of a single stack frame.
StackView
StaleDataException	This exception is thrown when a Cursor contains stale data and must be requeried before being used again.
StandardCharsets	Convenient access to the most important built-in charsets.
StartElementListener	Listens for the beginning of elements.
StateListDrawable	Lets you assign a number of graphic images to a single Drawable and swap out the visible item by a string ID value.
Statement	Interface used for executing static SQL statements to retrieve query results.
StatementEvent	A statement event that a PreparedStatement is closed
StatementEventListener	An object that registers to be notified of events that occur on PreparedStatements that are in the Statement pool.
StateSet	State sets are arrays of positive ints where each element represents the state of a `View` (e.g.
StatFs	Retrieve overall information about the space on a filesystem.
StaticLayout	StaticLayout is a Layout for text that will not be edited after it is laid out.
StatusBarNotification	Class encapsulating a Notification.
StatusLine	Represents a status line as returned from a HTTP server.
StorageManager	StorageManager is the interface to the systems storage service.
StreamCorruptedException	Signals that the `readObject()` method could not read an object due to missing information (for example, a cyclic reference that doesn't match a previous instance, or a missing class descriptor for the object to be loaded).
StreamHandler	A `StreamHandler` object writes log messages to an output stream, that is, objects of the class `OutputStream` .
StreamResult	Acts as an holder for a transformation result, which may be XML, plain Text, HTML, or some other form of markup.
StreamSource	Acts as an holder for a transformation Source in the form of a stream of XML markup.
StreamTokenizer	Parses a stream into a set of defined tokens, one at a time.
StrictContentLengthStrategy	The strict implementation of the content length strategy.
StrictHostnameVerifier	The Strict HostnameVerifier works the same way as Sun Java 1.4, Sun Java 5, Sun Java 6-rc.
StrictMath	Class StrictMath provides basic math constants and operations such as trigonometric functions, hyperbolic functions, exponential, logarithms, etc.
StrictMode	StrictMode is a developer tool which detects things you might be doing by accident and brings them to your attention so you can fix them.
StrictMode.ThreadPolicy	`StrictMode` policy applied to a certain thread.
StrictMode.ThreadPolicy.Builder	Creates `StrictMode.ThreadPolicy` instances.
StrictMode.VmPolicy	`StrictMode` policy applied to all threads in the virtual machine's process.
StrictMode.VmPolicy.Builder	Creates `StrictMode.VmPolicy` instances.
StrikethroughSpan
String	An immutable sequence of characters/code units ( `char` s).
StringBuffer	A modifiable `sequence of characters` for use in creating strings, where all accesses are synchronized.
StringBufferInputStream	This class was deprecated in API level 1. Use `StringReader` instead.
StringBuilder	A modifiable `sequence of characters` for use in creating strings.
StringBuilderPrinter	Implementation of a `Printer` that sends its output to a `StringBuilder` .
StringCharacterIterator	An implementation of `CharacterIterator` for strings.
StringDef	Denotes that the annotated String element, represents a logical type and that its value should be one of the explicitly named constants.
StringEntity	An entity whose content is retrieved from a string.
StringIndexOutOfBoundsException	Thrown when the a string is indexed with a value less than zero, or greater than or equal to the size of the array.
StringReader	A specialized `Reader` that reads characters from a `String` in a sequential manner.
StringRes	Denotes that an integer parameter, field or method return value is expected to be a String resource reference (e.g.
StringTokenizer	Breaks a string into tokens; new code should probably use `split(String)` .
StringWriter	A specialized `Writer` that writes characters to a `StringBuffer` in a sequential manner, appending them in the process.
Struct	An interface which provides facilities for manipulating an SQL structured type as a Java object.
StyleableRes	Denotes that a integer parameter, field or method return value is expected to be a styleable resource reference (e.g.
StyleRes	Denotes that a integer parameter, field or method return value is expected to be a style resource reference (e.g.
StyleSpan	Describes a style in a span.
Subject	The central class of the `javax.security.auth` package representing an authenticated user or entity (both referred to as "subject").
SubjectDomainCombiner	Legacy security code; do not use.
SubMenu	Subclass of `Menu` for sub menus.
SubscriptSpan
SuggestionsInfo	This class contains a metadata of suggestions from the text service
SuggestionSpan	Holds suggestion candidates for the text enclosed in this span.
SumPathEffect
SuperscriptSpan
SupplicantState	From `defs.h` in `wpa_supplicant` .
Suppress	Use this annotation on test classes or test methods that should not be included in a test suite.
SuppressLint	Indicates that Lint should ignore the specified warnings for the annotated element.
SuppressWarnings	Annotation type used to indicate that the compiler should not issue the specified warnings for the marked program element.
Surface	Handle onto a raw buffer that is being managed by the screen compositor.
Surface.OutOfResourcesException	Exception thrown when a Canvas couldn't be locked with `lockCanvas(Rect)` , or when a SurfaceTexture could not successfully be allocated.
SurfaceHolder	Abstract interface to someone holding a display surface.
SurfaceHolder.BadSurfaceTypeException	Exception that is thrown from `lockCanvas()` when called on a Surface whose type is SURFACE_TYPE_PUSH_BUFFERS.
SurfaceHolder.Callback	A client may implement this interface to receive information about changes to the surface.
SurfaceHolder.Callback2	Additional callbacks that can be received for `SurfaceHolder.Callback` .
SurfaceTexture	Captures frames from an image stream as an OpenGL ES texture.
SurfaceTexture.OnFrameAvailableListener	Callback interface for being notified that a new stream frame is available.
SurfaceTexture.OutOfResourcesException	This class was deprecated in API level 19. No longer thrown. `Surface.OutOfResourcesException` is used instead.
SurfaceView	Provides a dedicated drawing surface embedded inside of a view hierarchy.
SweepGradient
SwipeRefreshLayout	The SwipeRefreshLayout should be used whenever the user can refresh the contents of a view via a vertical swipe gesture.
SwipeRefreshLayout.OnRefreshListener	Classes that wish to be notified when the swipe gesture correctly triggers a refresh should implement this interface.
Switch	A Switch is a two-state toggle switch widget that can select between two options.
SwitchPreference	A `Preference` that provides a two-state toggleable option.
SyncAdapterType	Value type that represents a SyncAdapterType.
SyncBaseInstrumentation	If you would like to test sync a single provider with an `InstrumentationTestCase` , this provides some of the boiler plate in `setUp()` and `tearDown()` .
SyncBasicHttpContext	Thread-safe extension of the `BasicHttpContext` .
SyncContext
SyncFailedException	Signals that the `sync()` method has failed to complete.
SynchronousQueue <E>	A `blocking queue` in which each insert operation must wait for a corresponding remove operation by another thread, and vice versa.
SyncInfo	Information about the sync operation that is currently underway.
SyncRequest
SyncRequest.Builder	Builder class for a `SyncRequest` .
SyncResult	This class is used to communicate the results of a sync operation to the SyncManager.
SyncStateContract	The ContentProvider contract for associating data with ana data array account.
SyncStateContract.Columns
SyncStateContract.Constants
SyncStateContract.Helpers
SyncStats	Used to record various statistics about the result of a sync operation.
SyncStatusObserver
SynthesisCallback	A callback to return speech data synthesized by a text to speech engine.
SynthesisRequest	Contains data required by engines to synthesize speech.
System	Provides access to system-related information and resources including standard input and output.
SystemClock	Core timekeeping facilities.

T

TabActivity	This class was deprecated in API level 13. New applications should use Fragments instead of this class; to continue to run on older devices, you can use the v4 support library which provides a version of the Fragment API that is compatible down to `DONUT` .
TabHost	Container for a tabbed window view.
TabHost.OnTabChangeListener	Interface definition for a callback to be invoked when tab changed
TabHost.TabContentFactory	Makes the content of a tab when it is selected.
TabHost.TabSpec	A tab has a tab indicator, content, and a tag that is used to keep track of it.
TableLayout	A layout that arranges its children into rows and columns.
TableLayout.LayoutParams	This set of layout parameters enforces the width of each child to be `MATCH_PARENT` and the height of each child to be `WRAP_CONTENT` , but only if the height is not specified.
TableRow	A layout that arranges its children horizontally.
TableRow.LayoutParams	Set of layout parameters used in table rows.
TabStopSpan	Represents a single tab stop on a line.
TabStopSpan.Standard	The default implementation of TabStopSpan.
TabWidget	Displays a list of tab labels representing each page in the parent's tab collection.
Tag	Represents an NFC tag that has been discovered.
TagLostException
TagTechnology	`TagTechnology` is an interface to a technology in a `Tag` .
Target	Defines a meta-annotation for determining what `ElementType` s an annotation can be applied to.
TargetApi	Indicates that Lint should treat this type as targeting a given API level, no matter what the project target is.
TaskStackBuilder	Utility class for constructing synthetic back stacks for cross-task navigation on Android 3.0 and newer.
TaskStackBuilder	Utility class for constructing synthetic back stacks for cross-task navigation on Android 3.0 and newer.
TaskStackBuilder.SupportParentable
Telephony	The Telephony provider contains data related to phone operation, specifically SMS and MMS messages and access to the APN list, including the MMSC to use.
Telephony.BaseMmsColumns	Base columns for tables that contain MMSs.
Telephony.CanonicalAddressesColumns	Columns for the "canonical_addresses" table used by MMS and SMS.
Telephony.Carriers	Carriers class contains information about APNs, including MMSC information.
Telephony.Mms	Contains all MMS messages.
Telephony.Mms.Addr	Contains address information for an MMS message.
Telephony.Mms.Draft	Contains all MMS messages in the MMS app drafts folder.
Telephony.Mms.Inbox	Contains all MMS messages in the MMS app inbox.
Telephony.Mms.Intents	Intents class.
Telephony.Mms.Outbox	Contains all MMS messages in the MMS app outbox.
Telephony.Mms.Part	Contains message parts.
Telephony.Mms.Rate	Message send rate table.
Telephony.Mms.Sent	Contains all MMS messages in the MMS app sent folder.
Telephony.MmsSms	Contains all MMS and SMS messages.
Telephony.MmsSms.PendingMessages	Contains pending messages info.
Telephony.Sms	Contains all text-based SMS messages.
Telephony.Sms.Conversations	Contains all sent text-based SMS messages in the SMS app.
Telephony.Sms.Draft	Contains all sent text-based SMS messages in the SMS app.
Telephony.Sms.Inbox	Contains all text-based SMS messages in the SMS app inbox.
Telephony.Sms.Intents	Contains constants for SMS related Intents that are broadcast.
Telephony.Sms.Outbox	Contains all pending outgoing text-based SMS messages.
Telephony.Sms.Sent	Contains all sent text-based SMS messages in the SMS app.
Telephony.TextBasedSmsColumns	Base columns for tables that contain text-based SMSs.
Telephony.Threads	Helper functions for the "threads" table used by MMS and SMS.
Telephony.ThreadsColumns	Columns for the "threads" table used by MMS and SMS.
TelephonyManager	Provides access to information about the telephony services on the device.
Templates	An object that implements this interface is the runtime representation of processed transformation instructions.
TemplatesHandler	A SAX ContentHandler that may be used to process SAX parse events (parsing transformation instructions) into a Templates object.
Test	A Test can be run and collect its results.
TestCase	A test case defines the fixture to run multiple tests.
TestFailure	A `TestFailure` collects a failed test together with the caught exception.
TestListener	A Listener for test progress
TestMethod	Represents a test to be run.
TestResult	A `TestResult` collects the results of executing a test case.
TestSuite	A `TestSuite` is a `Composite` of Tests.
TestSuiteBuilder	Build suites based on a combination of included packages, excluded packages, and predicates that must be satisfied.
TestSuiteBuilder.FailedToCreateTests	A special `TestCase` used to indicate a failure during the build() step.
TestSuiteLoader	An interface to define how a test suite should be loaded.
TestSuiteProvider	Implementors will know how to get a test suite.
TestTarget	This @interface was deprecated in API level 14. Obsolete.
TestTargetClass	This @interface was deprecated in API level 14. Obsolete.
Text	The `Text` interface inherits from `CharacterData` and represents the textual content (termed character data in XML) of an `Element` or `Attr` .
TextAppearanceSpan	Sets the text color, size, style, and typeface to match a TextAppearance resource.
TextAttribute	The TextAttribute class defines attribute keys and attribute values for text rendering.
TextClock	`TextClock` can display the current date and/or time as a formatted string.
TextDirectionHeuristic	Interface for objects that use a heuristic for guessing at the paragraph direction by examining text.
TextDirectionHeuristicCompat	Interface for objects that use a heuristic for guessing at the paragraph direction by examining text.
TextDirectionHeuristics	Some objects that implement `TextDirectionHeuristic` .
TextDirectionHeuristicsCompat	Some objects that implement TextDirectionHeuristic.
TextElementListener	Listens for the beginning and ending of text elements.
TextInfo	This class contains a metadata of the input of TextService
TextKeyListener	This is the key listener for typing normal text.
TextKeyListener.Capitalize
TextPaint	TextPaint is an extension of Paint that leaves room for some extra data used during text measuring and drawing.
TextServicesManager	System API to the overall text services, which arbitrates interaction between applications and text services.
TextSwitcher	Specialized `ViewSwitcher` that contains only children of type `TextView` .
TextToSpeech	Synthesizes speech from text for immediate playback or to create a sound file.
TextToSpeech.Engine	Constants and parameter names for controlling text-to-speech.
TextToSpeech.EngineInfo	Information about an installed text-to-speech engine.
TextToSpeech.OnInitListener	Interface definition of a callback to be invoked indicating the completion of the TextToSpeech engine initialization.
TextToSpeech.OnUtteranceCompletedListener	This interface was deprecated in API level 18. Use `UtteranceProgressListener` instead.
TextToSpeechService	Abstract base class for TTS engine implementations.
TextureView	A TextureView can be used to display a content stream.
TextureView.SurfaceTextureListener	This listener can be used to be notified when the surface texture associated with this texture view is available.
TextUtils
TextUtils.EllipsizeCallback
TextUtils.SimpleStringSplitter	A simple string splitter.
TextUtils.StringSplitter	An interface for splitting strings according to rules that are opaque to the user of this interface.
TextUtils.TruncateAt
TextUtilsCompat
TextView	Displays text to the user and optionally allows them to edit it.
TextView.BufferType
TextView.OnEditorActionListener	Interface definition for a callback to be invoked when an action is performed on the editor.
TextView.SavedState	User interface state that is stored by TextView for implementing `onSaveInstanceState()` .
TextWatcher	When an object of a type is attached to an Editable, its methods will be called when the text is changed.
Thread	A `Thread` is a concurrent unit of execution.
Thread.State	A representation of a thread's state.
Thread.UncaughtExceptionHandler	Implemented by objects that want to handle cases where a thread is being terminated by an uncaught exception.
ThreadDeath	ThreadDeath is thrown when a thread stops executing.
ThreadFactory	An object that creates new threads on demand.
ThreadGroup	`ThreadGroup` is a means of organizing threads into a hierarchical structure.
ThreadLocal <T>	Implements a thread-local storage, that is, a variable for which each thread has its own value.
ThreadPoolExecutor	An `ExecutorService` that executes each submitted task using one of possibly several pooled threads, normally configured using `Executors` factory methods.
ThreadPoolExecutor.AbortPolicy	A handler for rejected tasks that throws a `RejectedExecutionException` .
ThreadPoolExecutor.CallerRunsPolicy	A handler for rejected tasks that runs the rejected task directly in the calling thread of the `execute` method, unless the executor has been shut down, in which case the task is discarded.
ThreadPoolExecutor.DiscardOldestPolicy	A handler for rejected tasks that discards the oldest unhandled request and then retries `execute` , unless the executor is shut down, in which case the task is discarded.
ThreadPoolExecutor.DiscardPolicy	A handler for rejected tasks that silently discards the rejected task.
ThreadSafeClientConnManager	Manages a pool of `client connections` .
Throwable	The superclass of all classes which can be thrown by the VM.
ThumbnailUtils	Thumbnail generation routines for media provider.
Time	An alternative to the `Calendar` and `GregorianCalendar` classes.
Time	Java representation of an SQL `TIME` value.
TimeAnimator	This class provides a simple callback mechanism to listeners that is synchronized with all other animators in the system.
TimeAnimator.TimeListener	Implementors of this interface can set themselves as update listeners to a `TimeAnimator` instance to receive callbacks on every animation frame to receive the total time since the animator started and the delta time since the last frame.
TimedText	Class to hold the timed text's metadata, including: The characters for rendering The rendering position for the timed text To render the timed text, applications need to do the following: Implement the `MediaPlayer.OnTimedTextListener` interface Register the `MediaPlayer.OnTimedTextListener` callback on a MediaPlayer object that is used for playback When a onTimedText callback is received, do the following: call `getText()` to get the characters for rendering call `getBounds()` to get the text rendering area/region
TimeFormatException
TimeInterpolator	A time interpolator defines the rate of change of an animation.
TimeKeyListener	For entering times in a text field.
TimeoutException	Exception thrown when a blocking operation times out.
TimePicker	A view for selecting the time of day, in either 24 hour or AM/PM mode.
TimePicker.OnTimeChangedListener	The callback interface used to indicate the time has been adjusted.
TimePickerDialog	A dialog that prompts the user for the time of day using a `TimePicker` .
TimePickerDialog.OnTimeSetListener	The callback interface used to indicate the user is done filling in the time (they clicked on the 'Set' button).
Timer	Timers schedule one-shot or recurring `tasks` for execution.
TimerTask	The `TimerTask` class represents a task to run at a specified time.
Timestamp	`Timestamp` represents a signed time stamp.
Timestamp	A Java representation of the SQL `TIMESTAMP` type.
TimeUnit	A `TimeUnit` represents time durations at a given unit of granularity and provides utility methods to convert across units, and to perform timing and delay operations in these units.
TimeUtils	A class containing utility methods related to time zones.
TimeZone	`TimeZone` represents a time zone, primarily used for configuring a `Calendar` or `SimpleDateFormat` instance.
TimingLogger	A utility class to help log timings splits throughout a method call.
Toast	A toast is a view containing a quick little message for the user. The toast class helps you create and show those.
ToggleButton	Displays checked/unchecked states as a button with a "light" indicator and by default accompanied with the text "ON" or "OFF".
TokenIterator	An iterator for `String` tokens.
TokenWatcher	Helper class that helps you use IBinder objects as reference counted tokens.
ToneGenerator	This class provides methods to play DTMF tones (ITU-T Recommendation Q.23), call supervisory tones (3GPP TS 22.001, CEPT) and proprietary tones (3GPP TS 31.111).
TooManyListenersException	A `TooManyListenersException` is thrown when an attempt is made to add more than one listener to an event source which only supports a single listener.
Touch
TouchDelegate	Helper class to handle situations where you want a view to have a larger touch area than its actual view bounds.
TouchUtils	Reusable methods for generating touch events.
Trace	Writes trace events to the system trace buffer.
TrafficStats	Class that provides network traffic statistics.
TrafficStatsCompat	Helper for accessing features in TrafficStats introduced after API level 14 in a backwards compatible fashion.
TransactionTooLargeException	The Binder transaction failed because it was too large.
Transformation	Defines the transformation to be applied at one point in time of an Animation.
TransformationMethod	TextView uses TransformationMethods to do things like replacing the characters of passwords with dots, or keeping the newline characters from causing line breaks in single-line text fields.
Transformer	An instance of this abstract class can transform a source tree into a result tree.
TransformerConfigurationException	Indicates a serious configuration error.
TransformerException	This class specifies an exceptional condition that occurred during the transformation process.
TransformerFactory	A TransformerFactory instance can be used to create `Transformer` and `Templates` objects.
TransformerFactoryConfigurationError	Thrown when a problem with configuration with the Transformer Factories exists.
TransformerHandler	A TransformerHandler listens for SAX ContentHandler parse events and transforms them to a Result.
Transition	A Transition holds information about animations that will be run on its targets during a scene change.
Transition.TransitionListener	A transition listener receives notifications from a transition.
TransitionDrawable	An extension of LayerDrawables that is intended to cross-fade between the first and second layer.
TransitionInflater	This class inflates scenes and transitions from resource files.
TransitionManager	This class manages the set of transitions that fire when there is a change of `Scene` .
TransitionSet	A TransitionSet is a parent of child transitions (including other TransitionSets).
TransitionValues	Data structure which holds cached values for the transition.
TranslateAnimation	An animation that controls the position of an object.
TransportController	Base interface to controlling a media transport.
TransportMediator	Helper for implementing a media transport control (with play, pause, skip, and other media actions).
TransportPerformer	Implemented by the playback side of the media system, to respond to requests to perform actions and to retrieve its current state.
TransportStateListener	A listener for playback changes that can be registered with `TransportController` .
TreeMap <K, V>	A map whose entries are sorted by their keys.
TreeSet <E>	TreeSet is an implementation of SortedSet.
TriggerEvent	This class represents a Trigger Event - the event associated with a Trigger Sensor.
TriggerEventListener	This class is the listener used to handle Trigger Sensors.
TrustAnchor	This class represents a trust anchor for validation of X.509 certification path.
TrustManager	The marker interface for JSSE trust managers.
TrustManagerFactory	The factory for `TrustManager` s based on `KeyStore` or provider specific implementation.
TrustManagerFactorySpi	The Service Provider Interface (SPI) for the `TrustManagerFactory` class.
TunnelRefusedException
TwoLineListItem	This class was deprecated in API level 17. This class can be implemented easily by apps using a `RelativeLayout` or a `LinearLayout` .
TwoStatePreference	Common base class for preferences that have two selectable states, persist a boolean value in SharedPreferences, and may have dependent preferences that are enabled/disabled based on the current state.
Type	A Type describes the `Element` and dimensions used for an `Allocation` or a parallel operation.
Type	A Type describes the `Element` and dimensions used for an `Allocation` or a parallel operation.
Type	Common interface implemented by all Java types.
Type.Builder	Builder class for Type.
Type.Builder	Builder class for Type.
Type.CubemapFace
Type.CubemapFace
TypedArray	Container for an array of values that were retrieved with `obtainStyledAttributes(AttributeSet, int[], int, int)` or `obtainAttributes(AttributeSet, int[])` .
TypedValue	Container for a dynamically typed data value.
TypeEvaluator <T>	Interface for use with the `setEvaluator(TypeEvaluator)` function.
Typeface	The Typeface class specifies the typeface and intrinsic style of a font.
TypefaceSpan	Changes the typeface family of the text to which the span is attached.
TypeInfo	The `TypeInfo` interface represents a type referenced from `Element` or `Attr` nodes, specified in the schemas associated with the document.
TypeInfoProvider	This class provides access to the type information determined by `ValidatorHandler` .
TypeNotPresentException	Thrown when a program tries to access a class, interface, enum or annotation type through a string that contains the type's name and the type cannot be found.
Types	A class which defines constants used to identify generic SQL types, also called JDBC types.
TypeVariable <D extends GenericDeclaration >	This interface represents a type variables such as `'T'` in `'public interface Comparable '` , the bounded `'T'` in `'public interface A '` or the multiple bounded `'T'` in `'public interface B '` .

U

UiAutomation	Class for interacting with the device's UI by simulation user actions and introspection of the screen content.
UiAutomation.AccessibilityEventFilter	Listener for filtering accessibility events.
UiAutomation.OnAccessibilityEventListener	Listener for observing the `AccessibilityEvent` stream.
UiModeManager	This class provides access to the system uimode services.
UiThreadTest	This annotation can be used on an `InstrumentationTestCase` 's test methods.
UndeclaredThrowableException	This class provides a wrapper for an undeclared, checked exception thrown by an InvocationHandler.
UnderlineSpan
UnknownError	Thrown when the VM must throw an error which does not match any known exceptional condition.
UnknownFormatConversionException	An `UnknownFormatConversionException` will be thrown if the format conversion is unknown.
UnknownFormatFlagsException	An `UnknownFormatFlagsException` will be thrown if there is an unknown flag.
UnknownHostException	Thrown when a hostname can not be resolved.
UnknownServiceException	Is thrown if no appropriate `ContentHandler` could be found for a particular service requested by the URL connection.
UnmappableCharacterException	An `UnmappableCharacterException` is thrown when an unmappable character for the given charset is encountered.
UnrecoverableEntryException	`UnrecoverableEntryException` indicates, that a `KeyStore.Entry` cannot be recovered from a `KeyStore` .
UnrecoverableKeyException	`UnrecoverableKeyException` indicates, that a key cannot be recovered from a `KeyStore` .
UnresolvedAddressException	An `UnresolvedAddressException` is thrown when trying to use an unresolved network address in a network operation.
UnresolvedPermission	Legacy security code; do not use.
UnsatisfiedLinkError	Thrown when an attempt is made to invoke a native for which an implementation could not be found.
UnsupportedAddressTypeException	An `UnsupportedAddressTypeException` is thrown when connecting or binding to an unsupported address type.
UnsupportedCallbackException	Thrown when a `CallbackHandler` does not support a particular `Callback` .
UnsupportedCharsetException	An `UnsupportedCharsetException` is thrown when an unsupported charset name is encountered.
UnsupportedClassVersionError	Thrown when an attempt is made to load a class with a format version that is not supported by the VM.
UnsupportedDigestAlgorithmException	Authentication credentials required to respond to a authentication challenge are invalid
UnsupportedEncodingException	Thrown when a program asks for a particular character converter that is unavailable.
UnsupportedHttpVersionException	Indicates an unsupported version of the HTTP protocol.
UnsupportedOperationException	Thrown when an unsupported operation is attempted.
UnsupportedSchemeException	Exception thrown when an attempt is made to construct a MediaDrm object using a crypto scheme UUID that is not supported by the device
UpdateAppearance	The classes that affect character-level text in a way that modifies their appearance when one is added or removed must implement this interface.
UpdateLayout	The classes that affect character-level text formatting in a way that triggers a text layout update when one is added or removed must implement this interface.
Uri	Immutable URI reference.
URI	A Uniform Resource Identifier that identifies an abstract or physical resource, as specified by RFC 2396 .
Uri.Builder	Helper class for building or manipulating URI references.
UriMatcher	Utility class to aid in matching URIs in content providers.
UriPatternMatcher	Maintains a map of objects keyed by a request URI pattern.
UriPermission	Description of a single Uri permission grant.
URIResolver	An object that implements this interface that can be called by the processor to turn a URI used in document(), xsl:import, or xsl:include into a Source object.
URISyntaxException	A `URISyntaxException` will be thrown if some information could not be parsed while creating a URI.
URIUtils	A collection of utilities for `URIs` , to workaround bugs within the class or for ease-of-use features.
URL	A Uniform Resource Locator that identifies the location of an Internet resource as specified by RFC 1738 .
URLClassLoader	This class loader is responsible for loading classes and resources from a list of URLs which can refer to either directories or JAR files.
URLConnection	A connection to a URL for reading or writing.
URLDecoder	This class is used to decode a string which is encoded in the `application/x-www-form-urlencoded` MIME content type.
UrlEncodedFormEntity	An entity composed of a list of url-encoded pairs.
URLEncodedUtils	A collection of utilities for encoding URLs.
URLEncoder	This class is used to encode a string using the format required by `application/x-www-form-urlencoded` MIME content type.
UrlQuerySanitizer	Sanitizes the Query portion of a URL.
UrlQuerySanitizer.IllegalCharacterValueSanitizer	Sanitize values based on which characters they contain.
UrlQuerySanitizer.ParameterValuePair	A simple tuple that holds parameter-value pairs.
UrlQuerySanitizer.ValueSanitizer	A functor used to sanitize a single query value.
URLSpan
URLStreamHandler	The abstract class `URLStreamHandler` is the base for all classes which can handle the communication with a URL object over a particular protocol type.
URLStreamHandlerFactory	Defines a factory which creates an `URLStreamHandler` for a specified protocol.
URLUtil
UsbAccessory	A class representing a USB accessory, which is an external hardware component that communicates with an android application over USB.
UsbConstants	Contains constants for the USB protocol.
UsbDevice	This class represents a USB device attached to the android device with the android device acting as the USB host.
UsbDeviceConnection	This class is used for sending and receiving data and control messages to a USB device.
UsbEndpoint	A class representing an endpoint on a `UsbInterface` .
UsbInterface	A class representing an interface on a `UsbDevice` .
UsbManager	This class allows you to access the state of USB and communicate with USB devices.
UsbRequest	A class representing USB request packet.
UserDataHandler	When associating an object to a key on a node using `Node.setUserData()` the application can provide a handler that gets called when the node the object is associated to is being cloned, imported, or renamed.
UserDictionary	A provider of user defined words for input methods to use for predictive text input.
UserDictionary.Words	Contains the user defined words.
UserHandle	Representation of a user on the device.
UserManager	Manages users and user details on a multi-user system.
UsernamePasswordCredentials	Username and password `Credentials`
UserTokenHandler	A handler for determining if the given execution context is user specific or not.
UTFDataFormatException	Signals that an incorrectly encoded UTF-8 string has been encountered, most likely while reading some `DataInputStream` .
UtteranceProgressListener	Listener for events relating to the progress of an utterance through the synthesis queue.
UUID	UUID is an immutable representation of a 128-bit universally unique identifier (UUID).

V

Validator	A processor that checks an XML document against `Schema` .
ValidatorHandler	Streaming validator that works on SAX stream.
ValueAnimator	This class provides a simple timing engine for running animations which calculate animated values and set them on target objects.
ValueAnimator.AnimatorUpdateListener	Implementors of this interface can add themselves as update listeners to an `ValueAnimator` instance to receive callbacks on every animation frame, after the current frame's values have been calculated for that `ValueAnimator` .
ValueCallback <T>	A callback interface used to provide values asynchronously.
Vector <E>	Vector is an implementation of `List` , backed by an array and synchronized.
VelocityTracker	Helper for tracking the velocity of touch events, for implementing flinging and other such gestures.
VelocityTrackerCompat	Helper for accessing features in `VelocityTracker` introduced after API level 4 in a backwards compatible fashion.
VerifyError	Thrown when the VM notices that an attempt is made to load a class which does not pass the class verification phase.
Version	This class defines the current version of JUnit
VersionInfo	Provides access to version information for HTTP components.
Vibrator	Class that operates the vibrator on the device.
VideoView	Displays a video file.
View	This class represents the basic building block for user interface components.
View.AccessibilityDelegate	This class represents a delegate that can be registered in a `View` to enhance accessibility support via composition rather via inheritance.
View.BaseSavedState	Base class for derived classes that want to save and restore their own state in `onSaveInstanceState()` .
View.DragShadowBuilder	Creates an image that the system displays during the drag and drop operation.
View.MeasureSpec	A MeasureSpec encapsulates the layout requirements passed from parent to child.
View.OnApplyWindowInsetsListener	Listener for applying window insets on a view in a custom way.
View.OnAttachStateChangeListener	Interface definition for a callback to be invoked when this view is attached or detached from its window.
View.OnClickListener	Interface definition for a callback to be invoked when a view is clicked.
View.OnCreateContextMenuListener	Interface definition for a callback to be invoked when the context menu for this view is being built.
View.OnDragListener	Interface definition for a callback to be invoked when a drag is being dispatched to this view.
View.OnFocusChangeListener	Interface definition for a callback to be invoked when the focus state of a view changed.
View.OnGenericMotionListener	Interface definition for a callback to be invoked when a generic motion event is dispatched to this view.
View.OnHoverListener	Interface definition for a callback to be invoked when a hover event is dispatched to this view.
View.OnKeyListener	Interface definition for a callback to be invoked when a hardware key event is dispatched to this view.
View.OnLayoutChangeListener	Interface definition for a callback to be invoked when the layout bounds of a view changes due to layout processing.
View.OnLongClickListener	Interface definition for a callback to be invoked when a view has been clicked and held.
View.OnSystemUiVisibilityChangeListener	Interface definition for a callback to be invoked when the status bar changes visibility.
View.OnTouchListener	Interface definition for a callback to be invoked when a touch event is dispatched to this view.
ViewAnimator	Base class for a `FrameLayout` container that will perform animations when switching between its views.
ViewAsserts	Some useful assertions about views.
ViewCompat	Helper for accessing features in `View` introduced after API level 4 in a backwards compatible fashion.
ViewCompatKitKat	KitKat-specific View API implementation.
ViewConfiguration	Contains methods to standard constants used in the UI for timeouts, sizes, and distances.
ViewConfigurationCompat	Helper for accessing features in `ViewConfiguration` introduced after API level 4 in a backwards compatible fashion.
ViewDebug	Various debugging/tracing tools related to `View` and the view hierarchy.
ViewDebug.CapturedViewProperty	This annotation can be used to mark fields and methods to be dumped when the view is captured.
ViewDebug.ExportedProperty	This annotation can be used to mark fields and methods to be dumped by the view server.
ViewDebug.FlagToString	Defines a mapping from a flag to a String.
ViewDebug.HierarchyTraceType	This enum was deprecated in API level 16. This enum is now unused
ViewDebug.IntToString	Defines a mapping from an int value to a String.
ViewDebug.RecyclerTraceType	This enum was deprecated in API level 16. This enum is now unused
ViewDragHelper	ViewDragHelper is a utility class for writing custom ViewGroups.
ViewDragHelper.Callback	A Callback is used as a communication channel with the ViewDragHelper back to the parent view using it.
ViewFlipper	Simple `ViewAnimator` that will animate between two or more views that have been added to it.
ViewGroup	A `ViewGroup` is a special view that can contain other views (called children.) The view group is the base class for layouts and views containers.
ViewGroup.LayoutParams	LayoutParams are used by views to tell their parents how they want to be laid out.
ViewGroup.MarginLayoutParams	Per-child layout information for layouts that support margins.
ViewGroup.OnHierarchyChangeListener	Interface definition for a callback to be invoked when the hierarchy within this view changed.
ViewGroupCompat	Helper for accessing features in `ViewGroup` introduced after API level 4 in a backwards compatible fashion.
ViewGroupOverlay	A group overlay is an extra layer that sits on top of a ViewGroup (the "host view") which is drawn after all other content in that view (including the view group's children).
ViewManager	Interface to let you add and remove child views to an Activity.
ViewOverlay	An overlay is an extra layer that sits on top of a View (the "host view") which is drawn after all other content in that view (including children, if the view is a ViewGroup).
ViewPager	Layout manager that allows the user to flip left and right through pages of data.
ViewPager.LayoutParams	Layout parameters that should be supplied for views added to a ViewPager.
ViewPager.OnPageChangeListener	Callback interface for responding to changing state of the selected page.
ViewPager.PageTransformer	A PageTransformer is invoked whenever a visible/attached page is scrolled.
ViewPager.SavedState	This is the persistent state that is saved by ViewPager.
ViewPager.SimpleOnPageChangeListener	Simple implementation of the `ViewPager.OnPageChangeListener` interface with stub implementations of each method.
ViewParent	Defines the responsibilities for a class that will be a parent of a View.
ViewParentCompat	Helper for accessing features in `ViewParent` introduced after API level 4 in a backwards compatible fashion.
ViewParentCompatICS	ICS-specific ViewParent API implementation.
ViewPropertyAnimator	This class enables automatic and optimized animation of select properties on View objects.
ViewPropertyAnimatorCompat
ViewPropertyAnimatorListener	An animation listener receives notifications from an animation.
ViewStub	A ViewStub is an invisible, zero-sized View that can be used to lazily inflate layout resources at runtime.
ViewStub.OnInflateListener	Listener used to receive a notification after a ViewStub has successfully inflated its layout resource.
ViewSwitcher	`ViewAnimator` that switches between two views, and has a factory from which these views are created.
ViewSwitcher.ViewFactory	Creates views in a ViewSwitcher.
ViewTreeObserver	A view tree observer is used to register listeners that can be notified of global changes in the view tree.
ViewTreeObserver.OnDrawListener	Interface definition for a callback to be invoked when the view tree is about to be drawn.
ViewTreeObserver.OnGlobalFocusChangeListener	Interface definition for a callback to be invoked when the focus state within the view tree changes.
ViewTreeObserver.OnGlobalLayoutListener	Interface definition for a callback to be invoked when the global layout state or the visibility of views within the view tree changes.
ViewTreeObserver.OnPreDrawListener	Interface definition for a callback to be invoked when the view tree is about to be drawn.
ViewTreeObserver.OnScrollChangedListener	Interface definition for a callback to be invoked when something in the view tree has been scrolled.
ViewTreeObserver.OnTouchModeChangeListener	Interface definition for a callback to be invoked when the touch mode changes.
ViewTreeObserver.OnWindowAttachListener	Interface definition for a callback to be invoked when the view hierarchy is attached to and detached from its window.
ViewTreeObserver.OnWindowFocusChangeListener	Interface definition for a callback to be invoked when the view hierarchy's window focus state changes.
VirtualDisplay	Represents a virtual display.
Virtualizer	An audio virtualizer is a general name for an effect to spatialize audio channels.
Virtualizer.OnParameterChangeListener	The OnParameterChangeListener interface defines a method called by the Virtualizer when a parameter value has changed.
Virtualizer.Settings	The Settings class regroups all virtualizer parameters.
VirtualMachineError	`VirtualMachineError` is the superclass of all error classes that occur during the operation of the VM.
Visibility	A collection of utility methods for computing the visibility of triangle meshes.
Visibility	This transition tracks changes to the visibility of target views in the start and end scenes.
Visualizer	The Visualizer class enables application to retrieve part of the currently playing audio for visualization purpose.
Visualizer.MeasurementPeakRms	A class to store peak and RMS values.
Visualizer.OnDataCaptureListener	The OnDataCaptureListener interface defines methods called by the Visualizer to periodically update the audio visualization capture.
VoicemailContract	The contract between the voicemail provider and applications.
VoicemailContract.Status	Defines fields exposed through the /status path of this content provider.
VoicemailContract.Voicemails	Defines fields exposed through the /voicemail path of this content provider.
Void	Placeholder class for the Java keyword `void` .
VpnService	VpnService is a base class for applications to extend and build their own VPN solutions.
VpnService.Builder	Helper class to create a VPN interface.

W

WaitingThread	Represents a thread waiting for a connection.
WaitingThreadAborter	A simple class that can interrupt a `WaitingThread` .
WakefulBroadcastReceiver	Helper for the common pattern of implementing a `BroadcastReceiver` that receives a device wakeup event and then passes the work off to a `Service` , while ensuring that the device does not go back to sleep during the transition.
WallpaperInfo	This class is used to specify meta information of a wallpaper service.
WallpaperManager	Provides access to the system wallpaper.
WallpaperService	A wallpaper service is responsible for showing a live wallpaper behind applications that would like to sit on top of it.
WallpaperService.Engine	The actual implementation of a wallpaper.
WeakHashMap <K, V>	WeakHashMap is an implementation of Map with keys which are WeakReferences.
WeakReference <T>	Implements a weak reference, which is the middle of the three types of references.
WebBackForwardList	This class contains the back/forward list for a WebView.
WebChromeClient
WebChromeClient.CustomViewCallback	A callback interface used by the host application to notify the current page that its custom view has been dismissed.
WebHistoryItem	A convenience class for accessing fields in an entry in the back/forward list of a WebView.
WebIconDatabase	This class was deprecated in API level 18. This class is only required when running on devices up to `JELLY_BEAN_MR2`
WebIconDatabase.IconListener	This interface was deprecated in API level 18. This interface is obsolete.
WebResourceResponse	Encapsulates a resource response.
WebSettings	Manages settings state for a WebView.
WebSettings.LayoutAlgorithm	Enum for controlling the layout of html.
WebSettings.PluginState	The plugin state effects how plugins are treated on a page.
WebSettings.RenderPriority
WebSettings.TextSize	This enum was deprecated in API level 14. Use `setTextZoom(int)` and `getTextZoom()` instead.
WebSettings.ZoomDensity	Enum for specifying the WebView's desired density.
WebStorage	This class is used to manage the JavaScript storage APIs provided by the `WebView` .
WebStorage.Origin	This class encapsulates information about the amount of storage currently used by an origin for the JavaScript storage APIs.
WebStorage.QuotaUpdater	This interface was deprecated in API level 19. This class is obsolete and no longer used.
WebView	A View that displays web pages.
WebView.FindListener	Interface to listen for find results.
WebView.HitTestResult
WebView.PictureListener	This interface was deprecated in API level 12. This interface is now obsolete.
WebView.WebViewTransport	Transportation object for returning WebView across thread boundaries.
WebViewClient
WebViewDatabase	This class allows developers to determine whether any WebView used in the application has stored any of the following types of browsing data and to clear any such stored data for all WebViews in the application.
WebViewFragment	A fragment that displays a WebView.
WifiConfiguration	A class representing a configured Wi-Fi network, including the security configuration.
WifiConfiguration.AuthAlgorithm	Recognized IEEE 802.11 authentication algorithms.
WifiConfiguration.GroupCipher	Recognized group ciphers.
WifiConfiguration.KeyMgmt	Recognized key management schemes.
WifiConfiguration.PairwiseCipher	Recognized pairwise ciphers for WPA.
WifiConfiguration.Protocol	Recognized security protocols.
WifiConfiguration.Status	Possible status of a network configuration.
WifiEnterpriseConfig	Enterprise configuration details for Wi-Fi.
WifiEnterpriseConfig.Eap	The Extensible Authentication Protocol method used
WifiEnterpriseConfig.Phase2	The inner authentication method used
WifiInfo	Describes the state of any Wifi connection that is active or is in the process of being set up.
WifiManager	This class provides the primary API for managing all aspects of Wi-Fi connectivity.
WifiManager.MulticastLock	Allows an application to receive Wifi Multicast packets.
WifiManager.WifiLock	Allows an application to keep the Wi-Fi radio awake.
WifiP2pConfig	A class representing a Wi-Fi P2p configuration for setting up a connection
WifiP2pDevice	A class representing a Wi-Fi p2p device Note that the operations are not thread safe
WifiP2pDeviceList	A class representing a Wi-Fi P2p device list.
WifiP2pDnsSdServiceInfo	A class for storing Bonjour service information that is advertised over a Wi-Fi peer-to-peer setup.
WifiP2pDnsSdServiceRequest	A class for creating a Bonjour service discovery request for use with `addServiceRequest(WifiP2pManager.Channel, WifiP2pServiceRequest, WifiP2pManager.ActionListener)` and `removeServiceRequest(WifiP2pManager.Channel, WifiP2pServiceRequest, WifiP2pManager.ActionListener)`
WifiP2pGroup	A class representing a Wi-Fi P2p group.
WifiP2pInfo	A class representing connection information about a Wi-Fi p2p group
WifiP2pManager	This class provides the API for managing Wi-Fi peer-to-peer connectivity.
WifiP2pManager.ActionListener	Interface for callback invocation on an application action
WifiP2pManager.Channel	A channel that connects the application to the Wifi p2p framework.
WifiP2pManager.ChannelListener	Interface for callback invocation when framework channel is lost
WifiP2pManager.ConnectionInfoListener	Interface for callback invocation when connection info is available
WifiP2pManager.DnsSdServiceResponseListener	Interface for callback invocation when Bonjour service discovery response is received
WifiP2pManager.DnsSdTxtRecordListener	Interface for callback invocation when Bonjour TXT record is available for a service
WifiP2pManager.GroupInfoListener	Interface for callback invocation when group info is available
WifiP2pManager.PeerListListener	Interface for callback invocation when peer list is available
WifiP2pManager.ServiceResponseListener	Interface for callback invocation when service discovery response other than Upnp or Bonjour is received
WifiP2pManager.UpnpServiceResponseListener	Interface for callback invocation when upnp service discovery response is received
WifiP2pServiceInfo	A class for storing service information that is advertised over a Wi-Fi peer-to-peer setup
WifiP2pServiceRequest	A class for creating a service discovery request for use with `addServiceRequest(WifiP2pManager.Channel, WifiP2pServiceRequest, WifiP2pManager.ActionListener)` and `removeServiceRequest(WifiP2pManager.Channel, WifiP2pServiceRequest, WifiP2pManager.ActionListener)` This class is used to create service discovery request for custom vendor specific service discovery protocol `SERVICE_TYPE_VENDOR_SPECIFIC` or to search all service protocols `SERVICE_TYPE_ALL` .
WifiP2pUpnpServiceInfo	A class for storing Upnp service information that is advertised over a Wi-Fi peer-to-peer setup.
WifiP2pUpnpServiceRequest	A class for creating a Upnp service discovery request for use with `addServiceRequest(WifiP2pManager.Channel, WifiP2pServiceRequest, WifiP2pManager.ActionListener)` and `removeServiceRequest(WifiP2pManager.Channel, WifiP2pServiceRequest, WifiP2pManager.ActionListener)`
WildcardType	A pattern type, such as the upper bounded wildcard `? extends Closeable` or the lower bounded wildcard `? super String` .
Window	Abstract base class for a top-level window look and behavior policy.
Window.Callback	API from a Window back to its caller.
WindowCompat	Helper for accessing features in `Window` introduced after API level 4 in a backwards compatible fashion.
WindowId	Safe identifier for a window.
WindowId.FocusObserver	Subclass for observing changes to the focus state of an `WindowId` .
WindowInsets	Describes a set of insets for window content.
WindowManager	The interface that apps use to talk to the window manager.
WindowManager.BadTokenException	Exception that is thrown when trying to add view whose `WindowManager.LayoutParams` `token` is invalid.
WindowManager.InvalidDisplayException	Exception that is thrown when calling `addView(View, ViewGroup.LayoutParams)` to a secondary display that cannot be found.
WindowManager.LayoutParams
Wire	Logs data to the wire LOG.
WorkSource	Describes the source of some work that may be done by someone else.
WpsInfo	A class representing Wi-Fi Protected Setup
Wrapper	This class is an actual usage of the wrapper pattern for JDBC classes.
WrapperListAdapter	List adapter that wraps another list adapter.
WrapTogetherSpan
WritableByteChannel	A `WritableByteChannel` is a type of `Channel` that can write bytes.
WriteAbortedException	Signals that the `readObject()` method has detected an exception marker in the input stream.
Writer	The base class for all writers.

X

X500Principal	Represents an X.500 principal, which holds the distinguished name of some network entity.
X509Certificate	Abstract base class for X.509 certificates.
X509Certificate	Abstract base class for X.509 certificates.
X509CertSelector	A certificate selector ( `CertSelector` for selecting `X509Certificate` s that match the specified criteria.
X509CRL	Abstract base class for X.509 certificate revocation lists (CRL).
X509CRLEntry	Abstract base class for entries in a certificate revocation list (CRL).
X509CRLSelector	A CRL selector ( `CRLSelector` for selecting `X509CRL` s that match the specified criteria.
X509EncodedKeySpec	The key specification of an X.509 encoded key in ASN.1 format.
X509ExtendedKeyManager	The abstract extension for the `X509KeyManager` interface.
X509Extension	The interface specifying an X.509 Certificate or CRL extension.
X509HostnameVerifier	Interface for checking if a hostname matches the names stored inside the server's X.509 certificate.
X509KeyManager	A Key Manager for X509 certificate-based key pairs.
X509TrustManager	The trust manager for X509 certificates to be used to perform authentication for secure sockets.
X509TrustManagerExtensions	X509TrustManager wrapper exposing Android-added features.
Xfermode	Xfermode is the base class for objects that are called to implement custom "transfer-modes" in the drawing pipeline.
Xml	XML utility methods.
Xml.Encoding	Supported character encodings.
XMLConstants	Utility class to contain basic XML values as constants.
XMLFilter	Interface for an XML filter.
XMLFilterImpl	Base class for deriving an XML filter.
XMLFormatter	Formatter to convert a `LogRecord` into an XML string.
XMLGregorianCalendar	Representation for W3C XML Schema 1.0 date/time datatypes.
XmlPullParser	XML Pull Parser is an interface that defines parsing functionality provided in XMLPULL V1 API (visit this website to learn more about API and its implementations).
XmlPullParserException	This exception is thrown to signal XML Pull Parser related faults.
XmlPullParserFactory	This class is used to create implementations of XML Pull Parser defined in XMPULL V1 API.
XMLReader	Interface for reading an XML document using callbacks.
XMLReaderAdapter	Adapt a SAX2 XMLReader as a SAX1 Parser.
XMLReaderFactory	Factory for creating an XML reader.
XmlRes	Denotes that an integer parameter, field or method return value is expected to be an XML resource reference.
XmlResourceParser	The XML parsing interface returned for an XML resource.
XmlSerializer	Define an interface to serialization of XML Infoset.
XPath	`XPath` provides access to the XPath evaluation environment and expressions.
XPathConstants	XPath constants.
XPathException	`XPathException` represents a generic XPath exception.
XPathExpression	`XPathExpression` provides access to compiled XPath expressions.
XPathExpressionException	`XPathExpressionException` represents an error in an XPath expression.
XPathFactory	An `XPathFactory` instance can be used to create `XPath` objects.
XPathFactoryConfigurationException	`XPathFactoryConfigurationException` represents a configuration error in a `XPathFactory` environment.
XPathFunction	`XPathFunction` provides access to XPath functions.
XPathFunctionException	`XPathFunctionException` represents an error with an XPath function.
XPathFunctionResolver	`XPathFunctionResolver` provides access to the set of user defined `XPathFunction` s.
XPathVariableResolver	`XPathVariableResolver` provides access to the set of user defined XPath variables.

Y

YuvImage YuvImage contains YUV data and provides a method that compresses a region of the YUV data to a Jpeg.

Z

ZipEntry	An entry within a zip file.
ZipError	Thrown when an unrecoverable zip error has occurred.
ZipException	This runtime exception is thrown by `ZipFile` and `ZipInputStream` when the file or stream is not a valid zip file.
ZipFile	This class provides random read access to a zip file.
ZipInputStream	Used to read (decompress) the data from zip files.
ZipOutputStream	Used to write (compress) data into zip files.
ZoomButton
ZoomButtonsController	The `ZoomButtonsController` handles showing and hiding the zoom controls and positioning it relative to an owner view.
ZoomButtonsController.OnZoomListener	Interface that will be called when the user performs an interaction that triggers some action, for example zooming.
ZoomControls	The `ZoomControls` class displays a simple set of controls used for zooming and provides callbacks to register for events.

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