关闭android中播放音乐的所有服务

我使用Alarm manager停止在android中播放的所有音乐。但我不知道该怎么做。 在主活动源代码中

 Intent intent = new Intent(AlarmActivity.this, OneShotAlarm.class);
        PendingIntent sender = PendingIntent.getBroadcast(AlarmActivity.this,
                0, intent, 0);

        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(System.currentTimeMillis());
        calendar.add(Calendar.SECOND, 5);

        // Schedule the alarm!
        AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
        am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender);

和报警接收器

public class OneShotAlarm extends BroadcastReceiver

{

}

您可以查看：

像这样的方法应该会奏效：

AudioManager aManager = (AudioManager)getSystemService(AUDIO_SERVICE);
aManager.setStreamMute(AudioManager.STREAM_MUSIC, true);

编辑： 有一个功能可以获取“音频焦点”：

---

我可以用AudioManager完成，但音量已关闭，音乐仍在播放（没有声音）。如何停止播放音乐？我可以通过audioManager设置音量静音。但我想关闭媒体播放器，因为它正在安卓系统中运行音乐(

AudioManager aManager = (AudioManager)getSystemService(AUDIO_SERVICE);
aManager.setStreamMute(AudioManager.STREAM_MUSIC, true);

public int requestAudioFocus (AudioManager.OnAudioFocusChangeListener l, int streamType, int durationHint)

AudioManager am = mContext.getSystemService(Context.AUDIO_SERVICE);
...

// Request audio focus for playback
int result = am.requestAudioFocus(afChangeListener,
                                 // Use the music stream.
                                 AudioManager.STREAM_MUSIC,
                                 // Request permanent focus.
                                 AudioManager.AUDIOFOCUS_GAIN);

if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
    am.unregisterMediaButtonEventReceiver(RemoteControlReceiver);
    // Start playback.
}