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| java.lang.Object | |
| ↳ | android.speech.SpeechRecognizer |
This class provides access to the speech recognition service. This service allows access to the
speech recognizer. Do not instantiate this class directly, instead, call
createSpeechRecognizer(Context)
. This class's methods must be
invoked only from the main application thread.
The implementation of this API is likely to stream audio to remote servers to perform speech recognition. As such this API is not intended to be used for continuous recognition, which would consume a significant amount of battery and bandwidth.
Please note that the application must have
RECORD_AUDIO
permission to use this class.
| Constants | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| String | CONFIDENCE_SCORES |
Key used to retrieve a float array from the
Bundle
passed to the
onResults(Bundle)
and
onPartialResults(Bundle)
methods.
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| int | ERROR_AUDIO | Audio recording error. | |||||||||
| int | ERROR_CLIENT | Other client side errors. | |||||||||
| int | ERROR_INSUFFICIENT_PERMISSIONS | Insufficient permissions | |||||||||
| int | ERROR_NETWORK | Other network related errors. | |||||||||
| int | ERROR_NETWORK_TIMEOUT | Network operation timed out. | |||||||||
| int | ERROR_NO_MATCH | No recognition result matched. | |||||||||
| int | ERROR_RECOGNIZER_BUSY | RecognitionService busy. | |||||||||
| int | ERROR_SERVER | Server sends error status. | |||||||||
| int | ERROR_SPEECH_TIMEOUT | No speech input | |||||||||
| String | RESULTS_RECOGNITION |
Key used to retrieve an
ArrayList
from the
Bundle
passed to the
onResults(Bundle)
and
onPartialResults(Bundle)
methods.
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| Public Methods | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Cancels the speech recognition.
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Factory method to create a new
SpeechRecognizer
.
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Factory method to create a new
SpeechRecognizer
.
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Destroys the
SpeechRecognizer
object.
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Checks whether a speech recognition service is available on the system.
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Sets the listener that will receive all the callbacks.
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Starts listening for speech.
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Stops listening for speech.
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[Expand]
Inherited Methods
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|---|---|---|---|---|---|---|---|---|---|---|---|
From class
java.lang.Object
|
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Key used to retrieve a float array from the
Bundle
passed to the
onResults(Bundle)
and
onPartialResults(Bundle)
methods. The array should be
the same size as the ArrayList provided in
RESULTS_RECOGNITION
, and should contain
values ranging from 0.0 to 1.0, or -1 to represent an unavailable confidence score.
Confidence values close to 1.0 indicate high confidence (the speech recognizer is confident that the recognition result is correct), while values close to 0.0 indicate low confidence.
This value is optional and might not be provided.
Audio recording error.
Other client side errors.
Insufficient permissions
Other network related errors.
Network operation timed out.
No recognition result matched.
RecognitionService busy.
Server sends error status.
No speech input
Key used to retrieve an
ArrayList
from the
Bundle
passed to the
onResults(Bundle)
and
onPartialResults(Bundle)
methods. These strings are the possible
recognition results, where the first element is the most likely candidate.
Cancels the speech recognition. Please note that
setRecognitionListener(RecognitionListener)
should be called beforehand, otherwise
no notifications will be received.
Factory method to create a new
SpeechRecognizer
. Please note that
setRecognitionListener(RecognitionListener)
should be called before dispatching any
command to the created
SpeechRecognizer
, otherwise no notifications will be
received.
Use this version of the method to specify a specific service to direct this
SpeechRecognizer
to. Normally you would not use this; use
createSpeechRecognizer(Context)
instead to use the system default recognition
service.
| context |
in which to create
SpeechRecognizer
|
|---|---|
| serviceComponent |
the
ComponentName
of a specific service to direct this
SpeechRecognizer
to
|
SpeechRecognizer
Factory method to create a new
SpeechRecognizer
. Please note that
setRecognitionListener(RecognitionListener)
should be called before dispatching any
command to the created
SpeechRecognizer
, otherwise no notifications will be
received.
| context |
in which to create
SpeechRecognizer
|
|---|
SpeechRecognizer
Checks whether a speech recognition service is available on the system. If this method
returns
false
,
createSpeechRecognizer(Context)
will
fail.
| context |
with which
SpeechRecognizer
will be created
|
|---|
true
if recognition is available,
false
otherwise
Sets the listener that will receive all the callbacks. The previous unfinished commands will be executed with the old listener, while any following command will be executed with the new listener.
| listener |
listener that will receive all the callbacks from the created
SpeechRecognizer
, this must not be null.
|
|---|
Starts listening for speech. Please note that
setRecognitionListener(RecognitionListener)
should be called beforehand, otherwise
no notifications will be received.
| recognizerIntent |
contains parameters for the recognition to be performed. The intent
may also contain optional extras, see
RecognizerIntent
. If these values are
not set explicitly, default values will be used by the recognizer.
|
|---|
Stops listening for speech. Speech captured so far will be recognized as if the user had
stopped speaking at this point. Note that in the default case, this does not need to be
called, as the speech endpointer will automatically stop the recognizer listening when it
determines speech has completed. However, you can manipulate endpointer parameters directly
using the intent extras defined in
RecognizerIntent
, in which case you may sometimes
want to manually call this method to stop listening sooner. Please note that
setRecognitionListener(RecognitionListener)
should be called beforehand, otherwise
no notifications will be received.