java - 为什么我的第三首歌没有播放，怎么播放？

我目前正在播放一首歌，第一首歌结束后，第二首歌开始播放。当我的第二首歌曲结束时，第三首歌曲应该开始播放，但不是。如何使用MediaPlayer执行此操作。

这是我的onCompletion代码：

@Override
public void onCompletion(MediaPlayer mp) {
    didFinishFirst = true;
    if(didFinishFirst) {

        Uri songUri = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.two);

        mp = MediaPlayer.create(getApplicationContext(), songUri);
        mp.start();
        mState = STATE_INITIALIZED;
        didFinishSecond = true;
    } else if(didFinishSecond){
        Uri songUri = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.three);

        mp = MediaPlayer.create(getApplicationContext(), songUri);
        mp.start();
        mState = STATE_INITIALIZED;
        didFinishThird = true;
    }
    mPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {

        @Override
        public void onPrepared(MediaPlayer mp) {
            // No need
        }
    });
}

最佳答案

您需要再次将完成侦听器链接到MediaPLayer.create返回的新媒体播放器实例。只有这样oncompletion才会被触发

Override
public void onCompletion(MediaPlayer mp) {
    didFinishFirst = true;
    if(didFinishFirst) {

        Uri songUri = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.two);

        mp = MediaPlayer.create(getApplicationContext(), songUri);
        mp.start();
        mState = STATE_INITIALIZED;
        didFinishSecond = true;
        mp.setOnCompletionListener(this);
        // ^^^^^^^^^^^^^^^^^^^^^^
    } else if(didFinishSecond){
        Uri songUri = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.three);

        mp = MediaPlayer.create(getApplicationContext(), songUri);
        mp.start();
        mState = STATE_INITIALIZED;
        didFinishThird = true;
        mp.setOnCompletionListener(this);
        // ^^^^^^^^^^^^^^^^^^^^^^
    }
    mPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {

        @Override
        public void onPrepared(MediaPlayer mp) {
            // No need
        }
    });
}