VoiceInteractor


public final class VoiceInteractor
extends Object

java.lang.Object
   ↳ android.app.VoiceInteractor


Interface for an Activity to interact with the user through voice. Use Activity.getVoiceInteractor to retrieve the interface, if the activity is currently involved in a voice interaction.

The voice interactor revolves around submitting voice interaction requests to the back-end voice interaction service that is working with the user. These requests are submitted with submitRequest(Request), providing a new instance of a Request subclass describing the type of operation to perform -- currently the possible requests are ConfirmationRequest and CommandRequest.

Once a request is submitted, the voice system will process it and eventually deliver the result to the request object. The application can cancel a pending request at any time.

The VoiceInteractor is integrated with Activity's state saving mechanism, so that if an activity is being restarted with retained state, it will retain the current VoiceInteractor and any outstanding requests. Because of this, you should always use Request.getActivity to get back to the activity of a request, rather than holding on to the activity instance yourself, either explicitly or implicitly through a non-static inner class.

Summary

Nested classes

class VoiceInteractor.AbortVoiceRequest

Reports that the current interaction can not be complete with voice, so the application will need to switch to a traditional input UI. 

class VoiceInteractor.CommandRequest

Execute a vendor-specific command using the trusted system VoiceInteractionService. 

class VoiceInteractor.CompleteVoiceRequest

Reports that the current interaction was successfully completed with voice, so the application can report the final status to the user. 

class VoiceInteractor.ConfirmationRequest

Confirms an operation with the user via the trusted system VoiceInteractionService. 

class VoiceInteractor.PickOptionRequest

Select a single option from multiple potential options with the user via the trusted system VoiceInteractionService. 

class VoiceInteractor.Prompt

A set of voice prompts to use with the voice interaction system to confirm an action, select an option, or do similar operations. 

class VoiceInteractor.Request

Base class for voice interaction requests that can be submitted to the interactor. 

Public methods

VoiceInteractor.Request getActiveRequest(String name)

Return any currently active request that was submitted with the given name.

Request[] getActiveRequests()

Return all currently active requests.

String getPackageName()
boolean isDestroyed()
void notifyDirectActionsChanged()

Notifies the assist framework that the direct actions supported by the app changed.

boolean registerOnDestroyedCallback(Executor executor, Runnable callback)

Registers a callback to be called when the VoiceInteractor is destroyed.

boolean submitRequest(VoiceInteractor.Request request)
boolean submitRequest(VoiceInteractor.Request request, String name)

Submit a new Request to the voice interaction service.

boolean[] supportsCommands(String[] commands)

Queries the supported commands available from the VoiceInteractionService.

boolean unregisterOnDestroyedCallback(Runnable callback)

Unregisters a previously registered onDestroy callback

Inherited methods

Public methods

getActiveRequest

Added in API level 23
public VoiceInteractor.Request getActiveRequest (String name)

Return any currently active request that was submitted with the given name.

Parameters
name String: The name used to submit the request, as per submitRequest(android.app.VoiceInteractor.Request, java.lang.String).

Returns
VoiceInteractor.Request Returns the active request with that name, or null if there was none.

getActiveRequests

Added in API level 23
public Request[] getActiveRequests ()

Return all currently active requests.

Returns
Request[]

getPackageName

Added in API level 33
public String getPackageName ()

Returns
String the package name of the service providing the VoiceInteractionService. This value cannot be null.

isDestroyed

Added in API level 29
public boolean isDestroyed ()

Returns
boolean whether the voice interactor is destroyed. You should not interact with a destroyed voice interactor.

notifyDirectActionsChanged

Added in API level 29
public void notifyDirectActionsChanged ()

Notifies the assist framework that the direct actions supported by the app changed.

registerOnDestroyedCallback

Added in API level 29
public boolean registerOnDestroyedCallback (Executor executor, 
                Runnable callback)

Registers a callback to be called when the VoiceInteractor is destroyed.

Parameters
executor Executor: Executor on which to run the callback. This value cannot be null. Callback and listener events are dispatched through this Executor, providing an easy way to control which thread is used. To dispatch events through the main thread of your application, you can use Context.getMainExecutor(). Otherwise, provide an Executor that dispatches to an appropriate thread.

callback Runnable: The callback to run. This value cannot be null.

Returns
boolean whether the callback was registered.

submitRequest

Added in API level 23
public boolean submitRequest (VoiceInteractor.Request request)

Parameters
request VoiceInteractor.Request

Returns
boolean

submitRequest

Added in API level 23
public boolean submitRequest (VoiceInteractor.Request request, 
                String name)

Submit a new Request to the voice interaction service. The request must be one of the available subclasses -- ConfirmationRequest, PickOptionRequest, CompleteVoiceRequest, AbortVoiceRequest, or CommandRequest.

Parameters
request VoiceInteractor.Request: The desired request to submit.

name String: An optional name for this request, or null. This can be used later with getActiveRequests() and getActiveRequest(String) to find the request.

Returns
boolean Returns true of the request was successfully submitted, else false.

supportsCommands

Added in API level 23
public boolean[] supportsCommands (String[] commands)

Queries the supported commands available from the VoiceInteractionService. The command is a string that describes the generic operation to be performed. An example might be "org.example.commands.PICK_DATE" to ask the user to pick a date. (Note: This is not an actual working example.)

Parameters
commands String: The array of commands to query for support.

Returns
boolean[] Array of booleans indicating whether each command is supported or not.

unregisterOnDestroyedCallback

Added in API level 29
public boolean unregisterOnDestroyedCallback (Runnable callback)

Unregisters a previously registered onDestroy callback

Parameters
callback Runnable: The callback to remove. This value cannot be null.

Returns
boolean whether the callback was unregistered.