Callback

Kotlin |Java

open class Callback : SessionPlayer.PlayerCallback

kotlin.Any
↳	androidx.media2.common.SessionPlayer.PlayerCallback
	↳	androidx.media2.session.RemoteSessionPlayer.Callback

A callback class to receive notifications for events on the remote session player. See registerPlayerCallback(Executor, PlayerCallback) to register this callback.

This is registered by MediaSession to notify volume changes to the MediaController.

Summary

Public constructors
`<init>()` A callback class to receive notifications for events on the remote session player.

Public methods
open Unit	`onVolumeChanged(@NonNull player: RemoteSessionPlayer, volume: Int)` Called to indicate that the volume has changed.

Inherited functions

From class PlayerCallback

`Unit`	`onAudioAttributesChanged(@NonNull player: SessionPlayer, @Nullable attributes: AudioAttributesCompat?)` Called when the player's current audio attributes are changed.
`Unit`	`onBufferingStateChanged(@NonNull player: SessionPlayer, @Nullable item: MediaItem?, buffState: Int)` Called when a buffering events for a media item happened.
`Unit`	`onCurrentMediaItemChanged(@NonNull player: SessionPlayer, @NonNull item: MediaItem)` Called when the player's current media item has changed. It's also called after `setPlaylist` or `setMediaItem`.
`Unit`	`onPlaybackCompleted(@NonNull player: SessionPlayer)` Called when the player finished playing. Playback state would be also set `PLAYER_STATE_PAUSED` with it. This will be called only when the repeat mode is set to `REPEAT_MODE_NONE`.
`Unit`	`onPlaybackSpeedChanged(@NonNull player: SessionPlayer, playbackSpeed: Float)` Called when the playback speed has changed.
`Unit`	`onPlayerStateChanged(@NonNull player: SessionPlayer, playerState: Int)` Called when the state of the player has changed.
`Unit`	`onPlaylistChanged(@NonNull player: SessionPlayer, @Nullable list: MutableList<MediaItem!>?, @Nullable metadata: MediaMetadata?)` Called when a playlist is changed. It's also called after `setPlaylist` or `setMediaItem`.
`Unit`	`onPlaylistMetadataChanged(@NonNull player: SessionPlayer, @Nullable metadata: MediaMetadata?)` Called when a playlist metadata is changed.
`Unit`	`onRepeatModeChanged(@NonNull player: SessionPlayer, repeatMode: Int)` Called when the repeat mode is changed. `SessionPlayer#getPreviousMediaItemIndex()` and `SessionPlayer#getNextMediaItemIndex()` values can be outdated when this callback is called if the current media item is the first or last item in the playlist.
`Unit`	`onSeekCompleted(@NonNull player: SessionPlayer, position: Long)` Called when `seekTo(long)` is completed.
`Unit`	`onShuffleModeChanged(@NonNull player: SessionPlayer, shuffleMode: Int)` Called when the shuffle mode is changed. `SessionPlayer#getPreviousMediaItemIndex()` and `SessionPlayer#getNextMediaItemIndex()` values can be outdated when this callback is called if the current media item is the first or last item in the playlist.

Public constructors

<init>

Callback()

A callback class to receive notifications for events on the remote session player. See registerPlayerCallback(Executor, PlayerCallback) to register this callback.

This is registered by MediaSession to notify volume changes to the MediaController.

Public methods

onVolumeChanged

open fun onVolumeChanged(@NonNull player: RemoteSessionPlayer, volume: Int): Unit

Called to indicate that the volume has changed.

Parameters
`player`	RemoteSessionPlayer: the player that has changed volume.
`volume`	RemoteSessionPlayer: the new volume

See Also

#setVolume(int)