程序包 ohos.media.common.sessioncore

类 AVControllerCallback

java.lang.Object

ohos.media.common.sessioncore.AVControllerCallback

public abstract class AVControllerCallback
extends Object

Provides callbacks to receive changes, for example, of playback states or media metadata from AVSession,You can use AVController.setAVControllerCallback(AVControllerCallback),to register a callback with the media session.

从以下版本开始:

3

SystemCapability

SystemCapability.Multimedia#MEDIA

构造器概要

构造器

构造器	说明
AVControllerCallback()

方法概要

限定符和类型	方法	说明
void	onAVMetadataChanged(AVMetadata metadata)	Called when media metadata changes.
void	onAVPlaybackStateChanged(AVPlaybackState state)	Called when the playback state changes.
void	onAVQueueChanged(List<AVQueueElement> queue)	Called when the playback queue changes.
void	onAVQueueTitleChanged(CharSequence title)	Called when the playback queue title changes.
void	onAVSessionDestroyed()	Called when a request to destroy the media session is received.
void	onAVSessionEvent(String event, PacMap options)	Called when an event sent by the media session through AVSession.sendAVSessionEvent(java.lang.String, ohos.utils.PacMap) is received.
void	onOptionsChanged(PacMap options)	Called when additional information about the media session changes.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

AVControllerCallback

public AVControllerCallback()

方法详细资料

onAVSessionDestroyed

public void onAVSessionDestroyed()

Called when a request to destroy the media session is received. You need to override this callback to process the request

从以下版本开始:

3

onAVSessionEvent

public void onAVSessionEvent(String event,
                             PacMap options)

Called when an event sent by the media session through AVSession.sendAVSessionEvent(java.lang.String, ohos.utils.PacMap) is received. You need to override this callback to handle the event

参数:

event - Indicates the name of the event that has been sent

options - Indicates additional information about the event

从以下版本开始:

3

onAVPlaybackStateChanged

public void onAVPlaybackStateChanged(AVPlaybackState state)

Called when the playback state changes. You need to override this callback to handle the change

参数:

state - Indicates the new playback state, which is one defined in AVPlaybackState

从以下版本开始:

3

onAVMetadataChanged

public void onAVMetadataChanged(AVMetadata metadata)

Called when media metadata changes. You need to override this callback to handle the change

参数:

metadata - Indicates the new media metadata. For details, see AVMetadata

从以下版本开始:

3

onAVQueueChanged

public void onAVQueueChanged(List<AVQueueElement> queue)

Called when the playback queue changes. You need to override this callback to handle the change

参数:

queue - Indicates the updated playback queue. For details, see AVQueueElement

从以下版本开始:

3

onAVQueueTitleChanged

public void onAVQueueTitleChanged(CharSequence title)

Called when the playback queue title changes. You need to override this callback to handle the change

参数:

title - Indicates the new title of the playback queue

从以下版本开始:

3

onOptionsChanged

public void onOptionsChanged(PacMap options)

Called when additional information about the media session changes. You need to override this callback to handle the change

参数:

options - Indicates the updated additional information about the AVSession instance

从以下版本开始:

3