Added in API level 21

Summary: Ctors | Methods | Inherited Methods

MediaController.Callback

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Kotlin |Java

public static abstract class MediaController.Callback
extends Object

java.lang.Object
↳	android.media.session.MediaController.Callback

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Callback for receiving updates from the session. A Callback can be registered using MediaController.registerCallback(Callback).

Summary

Public constructors
Callback()

Public methods
void	onAudioInfoChanged(MediaController.PlaybackInfo playbackInfo) Signals a change in the session's PlaybackInfo.
void	onExtrasChanged(Bundle extras) Override to handle changes to the MediaSession extras.
void	onMetadataChanged(MediaMetadata metadata) Override to handle changes to the current metadata.
void	onPlaybackStateChanged(PlaybackState state) Override to handle changes in playback state.
void	onQueueChanged(List<MediaSession.QueueItem> queue) Override to handle changes to items in the queue.
void	onQueueTitleChanged(CharSequence title) Override to handle changes to the queue title.
void	onSessionDestroyed() Override to handle the session being destroyed.
void	onSessionEvent(String event, Bundle extras) Override to handle custom events sent by the session owner without a specified interface.

Inherited methods

From class java.lang.Object Object clone() Creates and returns a copy of this object. boolean equals(Object obj) Indicates whether some other object is "equal to" this one. void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. final Class<?> getClass() Returns the runtime class of this Object. int hashCode() Returns a hash code value for the object. final void notify() Wakes up a single thread that is waiting on this object's monitor. final void notifyAll() Wakes up all threads that are waiting on this object's monitor. String toString() Returns a string representation of the object. final void wait(long timeoutMillis, int nanos) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait(long timeoutMillis) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait() Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public constructors

Callback

public Callback ()

Public methods

onAudioInfoChanged

Added in API level 21

public void onAudioInfoChanged (MediaController.PlaybackInfo playbackInfo)

Signals a change in the session's PlaybackInfo.

Parameters
playbackInfo	MediaController.PlaybackInfo: The latest known state of the session's playback info. This value cannot be null.

onExtrasChanged

Added in API level 21

public void onExtrasChanged (Bundle extras)

Override to handle changes to the MediaSession extras.

Parameters
extras	Bundle: The extras that can include other information associated with the MediaSession. This value may be null.

onMetadataChanged

Added in API level 21

public void onMetadataChanged (MediaMetadata metadata)

Override to handle changes to the current metadata.

Parameters
metadata	MediaMetadata: The current metadata for the session or null if none.

See also:

• MediaMetadata

onPlaybackStateChanged

Added in API level 21

public void onPlaybackStateChanged (PlaybackState state)

Override to handle changes in playback state.

Parameters
state	PlaybackState: The new playback state of the session This value may be null.

onQueueChanged

Added in API level 21

public void onQueueChanged (List<MediaSession.QueueItem> queue)

Override to handle changes to items in the queue.

Parameters
queue	List: A list of items in the current play queue. It should include the currently playing item as well as previous and upcoming items if applicable. This value may be null.

See also:

• MediaSession.QueueItem

onQueueTitleChanged

Added in API level 21

public void onQueueTitleChanged (CharSequence title)

Override to handle changes to the queue title.

Parameters
title	CharSequence: The title that should be displayed along with the play queue such as "Now Playing". May be null if there is no such title.

onSessionDestroyed

Added in API level 21

public void onSessionDestroyed ()

Override to handle the session being destroyed. The session is no longer valid after this call and calls to it will be ignored.

onSessionEvent

Added in API level 21

public void onSessionEvent (String event, 
                Bundle extras)

Override to handle custom events sent by the session owner without a specified interface. Controllers should only handle these for sessions they own.

Parameters
event	String: The event from the session. This value cannot be null.
extras	Bundle: Optional parameters for the event, may be null.