Android 如何在其他应用程序播放音乐时暂停视频,并在音乐停止后恢复?
当播放视频并且我从音乐应用程序中的通知恢复音乐时,视频仍在播放。音乐和视频同时播放。我想要的是在音乐开始时暂停视频。Youtube应用程序就是我在这里解释的。当谷歌搜索时,我发现AudioFocus在这种情况下用于MediaPlayer。VideoView支持AudioFocus吗?如果支持,那么如何使用它来实现上述目标?您可以调用Android 如何在其他应用程序播放音乐时暂停视频,并在音乐停止后恢复?,android,android-mediaplayer,android-videoview,Android,Android Mediaplayer,Android Videoview,当播放视频并且我从音乐应用程序中的通知恢复音乐时,视频仍在播放。音乐和视频同时播放。我想要的是在音乐开始时暂停视频。Youtube应用程序就是我在这里解释的。当谷歌搜索时,我发现AudioFocus在这种情况下用于MediaPlayer。VideoView支持AudioFocus吗?如果支持,那么如何使用它来实现上述目标?您可以调用changeAudioFocus(true) 当您开始从应用程序播放媒体时。它将在AudioFocusChangeListener上创建一个并使用AudioManag
changeAudioFocus(true)代码>
当您开始从应用程序播放媒体时。它将在AudioFocusChangeListener上创建一个并使用AudioManager
进行设置,当您收到AUDIOFOCUS\u LOSS
或AUDIOFOCUS\u LOSS\u TRANSIENT
消息时,您将收到一个回调
您还可以获得AUDIOFOCUS\u LOSS\u TRANSIENT\u CAN\u DUCK
,用于降低播放机的音量,某些媒体播放机在收到通知声音时会这样做
/**
* Used to indicate a transient loss of audio focus where the loser of the audio focus can
* lower its output volume if it wants to continue playing (also referred to as "ducking"), as
* the new focus owner doesn't require others to be silent.
* @see OnAudioFocusChangeListener#onAudioFocusChange(int)
*/
代码
调用onPause时是否尝试暂停MediaPlayer/ExoPlayer?我使用的是videoview,在这种情况下,不会调用onPause。我播放视频并向下滑动状态栏,其中有一个音乐应用程序的服务通知以播放音乐。我可能错了,但您可以尝试使用广播接收器,因此当它检测到音乐开始播放时,视频将停止,因为它收到广播接收器的通知。尝试了此操作,但不起作用,所以我做了一个肮脏的工作。我使用了_onWindowFocusChanged()_,当状态栏向下滑动时会调用它,并检查mediaPlayer是否正在播放此函数。这只适用于我的应用程序的音乐。应该已经工作,在此应用程序中使用相同的代码:并且工作正常。
private final OnAudioFocusChangeListener mAudioFocusListener = createOnAudioFocusChangeListener();
private AudioManager mAudioManager = null;
private boolean mHasAudioFocus = false;
private void changeAudioFocus(boolean acquire) {
if (mAudioManager == null)
mAudioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
if (mAudioManager == null)
return;
if (acquire) {
if (!mHasAudioFocus) {
final int result = mAudioManager.requestAudioFocus(mAudioFocusListener,
AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN);
if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
mAudioManager.setParameters("bgm_state=true");
mHasAudioFocus = true;
}
}
} else if (mHasAudioFocus) {
mAudioManager.abandonAudioFocus(mAudioFocusListener);
mAudioManager.setParameters("bgm_state=false");
mHasAudioFocus = false;
}
}
private OnAudioFocusChangeListener createOnAudioFocusChangeListener() {
return new OnAudioFocusChangeListener() {
int audioDuckLevel = -1;
private int mLossTransientVolume = -1;
private boolean wasPlaying = false;
@Override
public void onAudioFocusChange(int focusChange) {
/*
* Pause playback during alerts and notifications
*/
switch (focusChange) {
case AudioManager.AUDIOFOCUS_LOSS:
if (BuildConfig.DEBUG) Log.i(TAG, "AUDIOFOCUS_LOSS");
// Pause playback
changeAudioFocus(false);
pause();
break;
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
if (BuildConfig.DEBUG) Log.i(TAG, "AUDIOFOCUS_LOSS_TRANSIENT");
// Pause playback
pausePlayback();
break;
case AudioManager.AUDIOFOCUS_GAIN:
if (BuildConfig.DEBUG) Log.i(TAG, "AUDIOFOCUS_GAIN: ");
// Resume playback
if (mLossTransientVolume != -1) {
mAudioManager.setStreamVolume(AudioManager.STREAM_MUSIC, mLossTransientVolume, 0);
mLossTransientVolume = -1;
}
if (mLossTransient) {
if (wasPlaying && mSettings.getBoolean("resume_playback", true))
play();
mLossTransient = false;
}
break;
}
}
private void pausePlayback() {
if (mLossTransient) return;
mLossTransient = true;
wasPlaying = isPlaying();
if (wasPlaying) pause();
}
};
}