MediaController.ControllerCallback

public void onAllowedCommandsChanged(
    @NonNull MediaController controller,
    @NonNull SessionCommandGroup commands
)

Called when the allowed commands are changed by session.

public void onBufferingStateChanged(
    @NonNull MediaController controller,
    @NonNull MediaItem item,
    int state
)

Called to report buffering events for a media item.

Use getBufferedPosition for current buffering position.

public void onConnected(
    @NonNull MediaController controller,
    @NonNull SessionCommandGroup allowedCommands
)

Called when the controller is successfully connected to the session. The controller becomes available afterwards.

public void onCurrentMediaItemChanged(
    @NonNull MediaController controller,
    @Nullable MediaItem item
)

Called when the current item is changed. It's also called after setPlaylist or setMediaItem. Also called when setMetadata is called on the current media item.

When it's called, you should invalidate previous playback information and wait for later callbacks. Also, current, previous, and next media item indices may need to be updated.

public @NonNull SessionResult onCustomCommand(
    @NonNull MediaController controller,
    @NonNull SessionCommand command,
    @Nullable Bundle args
)

Called when the session sent a custom command. Returns a SessionResult for session to get notification back. If the null is returned, RESULT_ERROR_UNKNOWN will be returned.

Default implementation returns RESULT_ERROR_NOT_SUPPORTED.

public void onDisconnected(@NonNull MediaController controller)

Called when the session refuses the controller or the controller is disconnected from the session. The controller becomes unavailable afterwards and the callback wouldn't be called.

It will be also called after the close, so you can put clean up code here. You don't need to call close after this.

public void onPlaybackCompleted(@NonNull MediaController controller)

Called when the playback is completed.

public void onPlaybackInfoChanged(
    @NonNull MediaController controller,
    @NonNull MediaController.PlaybackInfo info
)

Called when the session has changed anything related with the PlaybackInfo.

Interoperability: When connected to android.support.v4.media.session.MediaSessionCompat, this may be called when the session changes playback info by calling setPlaybackToLocal or setPlaybackToRemote}. Specifically:

• Prior to API 21, this will always be called whenever any of those two methods is called.
• From API 21 to 22, this is called only when the playback type is changed from local to remote (i.e. not from remote to local).
• From API 23, this is called only when the playback type is changed.

public void onPlaybackSpeedChanged(@NonNull MediaController controller, float speed)

Called when playback speed is changed.

public void onPlayerStateChanged(@NonNull MediaController controller, int state)

Called when the player state is changed.

public void onPlaylistChanged(
    @NonNull MediaController controller,
    @Nullable List<MediaItem> list,
    @Nullable MediaMetadata metadata
)

Called when a playlist is changed. It's also called after setPlaylist or setMediaItem. Also called when setMetadata is called on a media item that is contained in the current playlist.

When it's called, current, previous, and next media item indices may need to be updated.

public void onPlaylistMetadataChanged(
    @NonNull MediaController controller,
    @Nullable MediaMetadata metadata
)

Called when a playlist metadata is changed.

public void onRepeatModeChanged(@NonNull MediaController controller, int repeatMode)

Called when the repeat mode is changed.

public void onSeekCompleted(@NonNull MediaController controller, long position)

Called to indicate that seeking is completed.

public int onSetCustomLayout(
    @NonNull MediaController controller,
    @NonNull List<MediaSession.CommandButton> layout
)

Called when the session set the custom layout through the setCustomLayout.

Can be called before onConnected is called.

Default implementation returns RESULT_ERROR_NOT_SUPPORTED.

public void onShuffleModeChanged(
    @NonNull MediaController controller,
    int shuffleMode
)

Called when the shuffle mode is changed.

public void onSubtitleData(
    @NonNull MediaController controller,
    @NonNull MediaItem item,
    @NonNull SessionPlayer.TrackInfo track,
    @NonNull SubtitleData data
)

Called when the subtitle track has new subtitle data available.

public void onTrackDeselected(
    @NonNull MediaController controller,
    @NonNull SessionPlayer.TrackInfo trackInfo
)

Called when a track is deselected.

The types of tracks supported may vary based on player implementation, but generally a track should already be selected in order to be deselected and audio and video tracks should not be deselected.

public void onTrackSelected(
    @NonNull MediaController controller,
    @NonNull SessionPlayer.TrackInfo trackInfo
)

Called when a track is selected.

The types of tracks supported may vary based on player implementation, but generally one track will be selected for each track type.

public void onTracksChanged(
    @NonNull MediaController controller,
    @NonNull List<SessionPlayer.TrackInfo> tracks
)

Called when the tracks of the current media item is changed such as 1) when tracks of a media item become available, 2) when new tracks are found during playback, or 3) when the current media item is changed.

When it's called, you should invalidate previous track information and use the new tracks to call selectTrack or deselectTrack.

The types of tracks supported may vary based on player implementation.

public void onVideoSizeChanged(
    @NonNull MediaController controller,
    @NonNull VideoSize videoSize
)

Called when video size is changed.