获得AudioFocus和释放AudioFocus

本文主要是介绍获得AudioFocus和释放AudioFocus，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

获得AudioFocus
mAudioManager.requestAudioFocus(mAudioFocusListener,AudioManager.STREAM_MUSIC,AudioManager.AUDIOFOCUS_GAIN);
释放AudioFocus
mAudioManager.abandonAudioFocus(mAudioFocusListener);

private OnAudioFocusChangeListener mAudioFocusListener = new OnAudioFocusChangeListener() {
  public void onAudioFocusChange(int focusChange) {
   // AudioFocus is a new feature: focus updates are made verbose on
   // purpose
   Log.d(TAG, "mAudioFocusListener,onAudioFocusChange(" + focusChange +")");
   switch (focusChange) {
   case AudioManager.AUDIOFOCUS_LOSS:
   case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT: {

    stopRecorderSaveSample();
    NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    nm.cancel(R.drawable.recordicon);
    mAudioManager.abandonAudioFocus(mAudioFocusListener);
   }
    break;

   case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK:
    break;
   default:
    // Log.e("soundrecorder", "Unknown audio focus change code");
   }
  }
 };

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