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Android APIs
package

android.support.v4.util

Support android.util classes to assist with development of applications for android API level 4 or later.

Interfaces

Pools.Pool <T> Interface for managing a pool of objects. 

Classes

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. 
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. 
CircularArray <E> A circular array implementation that provides O(1) random read and O(1) prepend and O(1) append. 
LongSparseArray <E> SparseArray mapping longs to Objects, a version of the platform's LongSparseArray that can be used on older versions of the platform. 
LruCache <K, V> Static library version of LruCache . 
Pools Helper class for crating pools of objects. 
Pools.SimplePool <T> Simple (non-synchronized) pool of objects. 
Pools.SynchronizedPool <T> Synchronized) pool of objects. 
SimpleArrayMap <K, V> Base implementation of ArrayMap that doesn't include any standard Java container API interoperability. 
SparseArrayCompat <E> A copy of the current platform (currently KITKAT version of SparseArray ; provides a removeAt() method and other things.