android.media.AudioManager#dispatchMediaKeyEvent ( )源码实例Demo

/**
 * Redispatches unhandled media keys. This allows bluetooth headphones with play/pause or
 * other buttons to function correctly.
 */
@TargetApi(19)
private void handleMediaKey(KeyEvent e) {
    if (Build.VERSION.SDK_INT < 19) return;
    switch (e.getKeyCode()) {
        case KeyEvent.KEYCODE_MUTE:
        case KeyEvent.KEYCODE_HEADSETHOOK:
        case KeyEvent.KEYCODE_MEDIA_PLAY:
        case KeyEvent.KEYCODE_MEDIA_PAUSE:
        case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE:
        case KeyEvent.KEYCODE_MEDIA_STOP:
        case KeyEvent.KEYCODE_MEDIA_NEXT:
        case KeyEvent.KEYCODE_MEDIA_PREVIOUS:
        case KeyEvent.KEYCODE_MEDIA_REWIND:
        case KeyEvent.KEYCODE_MEDIA_RECORD:
        case KeyEvent.KEYCODE_MEDIA_FAST_FORWARD:
        case KeyEvent.KEYCODE_MEDIA_CLOSE:
        case KeyEvent.KEYCODE_MEDIA_EJECT:
        case KeyEvent.KEYCODE_MEDIA_AUDIO_TRACK:
            AudioManager am = (AudioManager) mTab.getApplicationContext().getSystemService(
                    Context.AUDIO_SERVICE);
            am.dispatchMediaKeyEvent(e);
            break;
        default:
            break;
    }
}
 

private void sendButton(int keycode) {
    AudioManager am = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
    KeyEvent downEvent = new KeyEvent(KeyEvent.ACTION_DOWN, keycode);
    am.dispatchMediaKeyEvent(downEvent);
    KeyEvent upEvent = new KeyEvent(KeyEvent.ACTION_UP, keycode);
    am.dispatchMediaKeyEvent(upEvent);
}
 

/**
  * Pause media
  */
 private void pauseMedia() {
   AudioManager audioManager =(AudioManager) getSystemService(Context.AUDIO_SERVICE);
   long eventtime = SystemClock.uptimeMillis() - 1;
KeyEvent downEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PAUSE, 0);
KeyEvent upEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PAUSE, 0);
audioManager.dispatchMediaKeyEvent(downEvent);
audioManager.dispatchMediaKeyEvent(upEvent);
  }
 

/**
  * set the phone to silent
  */
 private void playMedia() {
   AudioManager audioManager =(AudioManager) getSystemService(Context.AUDIO_SERVICE);
   long eventtime = SystemClock.uptimeMillis() - 1;
KeyEvent downEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PLAY, 0);
KeyEvent upEvent = new KeyEvent(eventtime, eventtime, KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PLAY, 0);
audioManager.dispatchMediaKeyEvent(downEvent);
audioManager.dispatchMediaKeyEvent(upEvent);
  }
 

/**
 * Redispatches unhandled media keys. This allows bluetooth headphones with play/pause or
 * other buttons to function correctly.
 */
@TargetApi(19)
private void handleMediaKey(KeyEvent e) {
    if (Build.VERSION.SDK_INT < 19) return;
    switch (e.getKeyCode()) {
        case KeyEvent.KEYCODE_MUTE:
        case KeyEvent.KEYCODE_HEADSETHOOK:
        case KeyEvent.KEYCODE_MEDIA_PLAY:
        case KeyEvent.KEYCODE_MEDIA_PAUSE:
        case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE:
        case KeyEvent.KEYCODE_MEDIA_STOP:
        case KeyEvent.KEYCODE_MEDIA_NEXT:
        case KeyEvent.KEYCODE_MEDIA_PREVIOUS:
        case KeyEvent.KEYCODE_MEDIA_REWIND:
        case KeyEvent.KEYCODE_MEDIA_RECORD:
        case KeyEvent.KEYCODE_MEDIA_FAST_FORWARD:
        case KeyEvent.KEYCODE_MEDIA_CLOSE:
        case KeyEvent.KEYCODE_MEDIA_EJECT:
        case KeyEvent.KEYCODE_MEDIA_AUDIO_TRACK:
            AudioManager am = (AudioManager) mTab.getApplicationContext().getSystemService(
                    Context.AUDIO_SERVICE);
            am.dispatchMediaKeyEvent(e);
            break;
        default:
            break;
    }
}
 

/**
 * Redispatches unhandled media keys. This allows bluetooth headphones with play/pause or
 * other buttons to function correctly.
 */
@TargetApi(19)
private void handleMediaKey(KeyEvent e) {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) return;
    switch (e.getKeyCode()) {
        case KeyEvent.KEYCODE_MUTE:
        case KeyEvent.KEYCODE_HEADSETHOOK:
        case KeyEvent.KEYCODE_MEDIA_PLAY:
        case KeyEvent.KEYCODE_MEDIA_PAUSE:
        case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE:
        case KeyEvent.KEYCODE_MEDIA_STOP:
        case KeyEvent.KEYCODE_MEDIA_NEXT:
        case KeyEvent.KEYCODE_MEDIA_PREVIOUS:
        case KeyEvent.KEYCODE_MEDIA_REWIND:
        case KeyEvent.KEYCODE_MEDIA_RECORD:
        case KeyEvent.KEYCODE_MEDIA_FAST_FORWARD:
        case KeyEvent.KEYCODE_MEDIA_CLOSE:
        case KeyEvent.KEYCODE_MEDIA_EJECT:
        case KeyEvent.KEYCODE_MEDIA_AUDIO_TRACK:
            AudioManager am = (AudioManager) mTab.getApplicationContext().getSystemService(
                    Context.AUDIO_SERVICE);
            am.dispatchMediaKeyEvent(e);
            break;
        default:
            break;
    }
}
 

public void sendKeyPressAudioManager(Context context, int action, int keycode) {
    long uptime = SystemClock.uptimeMillis();

    AudioManager audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
    audioManager.dispatchMediaKeyEvent(new KeyEvent(uptime, uptime, action, keycode, 0));
}
 

@TargetApi(Build.VERSION_CODES.KITKAT)
public static void dispatchMediaKeyEvent(AudioManager manager, KeyEvent event) {
    manager.dispatchMediaKeyEvent(event);
}
 

@TargetApi(Build.VERSION_CODES.KITKAT)
public static void dispatchMediaKeyEvent(AudioManager manager, KeyEvent event) {
    manager.dispatchMediaKeyEvent(event);
}