Question

现在发生的事情是它还在控制其他音乐播放器。如果我在启动后有一个默认音乐播放器，如果我开始使用我的音乐播放器播放然后我按下耳机中的播放/暂停按钮它控制默认音乐播放器。我已经实现了像这样的heaset广播接收器，

            switch (keyEvent.getKeyCode()) {
                case KeyEvent.KEYCODE_HEADSETHOOK:
                    Log.d("TAG", "TAG: KEYCODE_HEADSETHOOK");
                    if (MusicService.isPlaying()) {
                        MusicService.player.pause();
                    } else {
                        MusicService.player.start();
                    }
                    new MusicService().showNotification();
                    break;
                case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE:
                    Log.d("TAG", "TAG: KEYCODE_MEDIA_PLAY");
                    if (MusicService.isPlaying()) {
                        MusicService.player.pause();
                    } else {
                        MusicService.player.start();
                    }
                    new MusicService().showNotification();
                    break;
                case KeyEvent.KEYCODE_MEDIA_PLAY:
                    break;
                case KeyEvent.KEYCODE_MEDIA_PAUSE:
                    Log.d("TAG", "TAG: KEYCODE_MEDIA_PAUSE");
                    break;
                case KeyEvent.KEYCODE_MEDIA_STOP:
                    break;
                case KeyEvent.KEYCODE_MEDIA_NEXT:
                    Log.d("TAG", "TAG: KEYCODE_MEDIA_NEXT");
                    if (MusicService.player.isPlaying()) {
                        MusicService.player.stop();
                    }
                    if (MusicService.songPosn < (MusicService.song.size() - 1)) {
                        MusicService.songPosn = MusicService.songPosn + 1;
                        if (SingleInstance.getInstance().getIndexCount()>= 1)
                            SingleInstance.getInstance().setIndexCount(SingleInstance.getInstance().getIndexCount()-1);
                    } else {
                        // play first song
                        MusicService.songPosn = 0;
                    }
                    new MusicService().playSong(true);
                    break;
                case KeyEvent.KEYCODE_MEDIA_PREVIOUS:
                    Log.d("TAG", "TAG: KEYCODE_MEDIA_PREVIOUS");
                    if (MusicService.player.isPlaying()) {
                        MusicService.player.stop();
                    }
                    if (MusicService.songPosn > 0) {
                        MusicService.songPosn = MusicService.songPosn - 1;
                    } else {
                        // play last song
                        MusicService.songPosn = MusicService.song.size() - 1;
                    }
                    new MusicService().playSong(true);
                    break;
            }

Answer 1

如果您想在活动中获取hedsethook事件，请按照以下代码进行操作：

 @Override
public boolean dispatchKeyEvent(KeyEvent event) {
    if (event.getAction() == KeyEvent.ACTION_DOWN) {
        switch (event.getKeyCode()) {
            case KeyEvent.KEYCODE_HEADSETHOOK:
                // Headset key detected
               // Do your stuff here
                return true;// To let the os know that the event is consumed here 
        }
    }
    return super.dispatchKeyEvent(event);
}

确保使用true来消耗该事件。要在服务中完成它，请使用BroadCast接收器，如下所示：

    IntentFilter filter = new IntentFilter(Intent.ACTION_MEDIA_BUTTON);//"android.intent.action.MEDIA_BUTTON"
MediaButtonIntentReceiver r = new MediaButtonIntentReceiver();
filter.setPriority(1000); //Sets receiver priority
registerReceiver(r, filter);

耳机按钮控制

1 个答案: