android 媒体按钮,如何使用新的MediaSession类在Android 5.x上接收媒体按钮？
我正在尝试使用新的MediaSession类接收媒体按钮，到目前为止我一直没有成功 . 有没有人设法使用新课程接收它们？
我已成功创建MediaSession并使用它来更新远程显示器(车载娱乐系统)上的歌曲信息，但到目前为止我无法接收按钮，耳机控制和蓝牙耳机控制 .
在我创建媒体会话后，我在用于播放音频的服务中执行以下操作：
_mediaSession = new MediaSession(getApplicationContext(), Global.PACKAGE_NAME + "." + TAG);
if (_mediaSession == null) {
_log.e(TAG, "initMediaSession: _mediaSession = null");
return;
}
_mediaSessionToken = _mediaSession.getSessionToken();
_mediaSession.setCallback(new Callback() {
public boolean onMediaButtonEvent(Intent mediaButtonIntent) {
_log.d(TAG, "onMediaButtonEvent called: " + mediaButtonIntent);
return false;
}
public void onPause() {
Log.d(TAG, "onPause called (media button pressed)");
super.onPause();
}
public void onPlay() {
Log.d(TAG, "onPlay called (media button pressed)");
super.onPlay();
}
public void onStop() {
Log.d(TAG, "onStop called (media button pressed)");
super.onStop();
}
});
_mediaSession.setFlags(MediaSession.FLAG_HANDLES_MEDIA_BUTTONS | MediaSession.FLAG_HANDLES_TRANSPORT_CONTROLS);
PlaybackState state = new PlaybackState.Builder()
.setActions(PlaybackState.ACTION_PLAY)
.setState(PlaybackState.STATE_STOPPED, PlaybackState.PLAYBACK_POSITION_UNKNOWN, SystemClock.elapsedRealtime())
.build();
_mediaSession.setPlaybackState(state);
_mediaSession.setActive(true);
但我仍然没有收到任何按钮按下 .
有人有主意吗？
谢谢
Update 改变后
PlaybackState state = new PlaybackState.Builder()
.setActions(PlaybackState.ACTION_PLAY)
.setState(PlaybackState.STATE_STOPPED, PlaybackState.PLAYBACK_POSITION_UNKNOWN, SystemClock.elapsedRealtime())
.build();
至
PlaybackState state = new PlaybackState.Builder()
.setActions(PlaybackState.ACTION_PLAY)
.setState(PlaybackState.STATE_STOPPED, PlaybackState.PLAYBACK_POSITION_UNKNOWN, 0)
.build();
我现在通过onMediaButtonEvent()回调接收按钮通知(例如被通知按下了KEYCODE_MEDIA_PAUSE)但是onPlay()，onPause()和onStop()从未被调用，任何想法为什么？