android - Android按下按钮可长时间播放声音

Question

我刚按下按钮就播放完声音

但我的声音很短，例如“哔哔”，短于1秒

如何按下按钮才能播放声音，直到按下按钮？

    bt = (Button)findViewById(R.id.clickme);
    final MediaPlayer mp = MediaPlayer.create(this, R.raw.beep);
    bt.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            mp.start();
        }
    });

Answer 1

您可以使用以下代码:

bt.setOnTouchListener(this);

@Override
public boolean onTouch(View arg0, MotionEvent event) {

    switch (event.getAction() ) { 
    case MotionEvent.ACTION_DOWN: 
        System.out.println("touch");
        mp.setLooping(true);
        mp.start();
        break;
    case MotionEvent.ACTION_UP:
        System.out.println("up");
        mp.pause();
        break; 
    }

    return true;
}

我进行了一些研究，发现Android Mediaplayer在循环播放无间隙声音时存在问题。

看到这个:Gapless Playback with android MediaPlayer

我也找到一些解决方案:

使用ogg格式的声音文件(https://en.wikipedia.org/wiki/.ogg)

可以使用声音池，它具有用于媒体播放的循环和缓存功能(https://developer.android.com/reference/android/media/SoundPool.html)

您也可以使用以下类:查看其是否有效。

    public class LoopMediaPlayer {

    public static final String TAG = LoopMediaPlayer.class.getSimpleName();

    private Context mContext = null;
    private int mResId = 0;
    private int mCounter = 1;

    private MediaPlayer mCurrentPlayer = null;
    private MediaPlayer mNextPlayer = null;

    public static LoopMediaPlayer create(Context context, int resId) {
        return new LoopMediaPlayer(context, resId);
    }

    private LoopMediaPlayer(Context context, int resId) {
        mContext = context;
        mResId = resId;

        mCurrentPlayer = MediaPlayer.create(mContext, mResId);
        mCurrentPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mediaPlayer) {
                mCurrentPlayer.start();
            }
        });

        createNextMediaPlayer();
    }

    private void createNextMediaPlayer() {
        mNextPlayer = MediaPlayer.create(mContext, mResId);
        mCurrentPlayer.setNextMediaPlayer(mNextPlayer);
        mCurrentPlayer.setOnCompletionListener(onCompletionListener);
    }

    private MediaPlayer.OnCompletionListener onCompletionListener = new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mediaPlayer) {
            mediaPlayer.release();
            mCurrentPlayer = mNextPlayer;

            createNextMediaPlayer();

            Log.d(TAG, String.format("Loop #%d", ++mCounter));
        }
    };
}

使用它只是调用

LoopMediaPlayer.create(context, R.raw.sound_file_name);

mp.setLooping(true);的含义