在MediaPlayer中连续播放声音时应用崩溃

Question

我在这里找到以下代码作为问题的答案： 在MediaPlayer中一个接一个地播放多个文件

当我运行它时，会播放3种声音，但应用程序会关闭并显示消息

不幸的是，该应用程序已停止。

onCompletion方法内是否缺少某些内容？

public class MainActivity extends Activity implements MediaPlayer.OnCompletionListener {

    int[] tracks = new int[3];
    int currentTrack = 0;
    private MediaPlayer mediaPlayer = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tracks[0] = R.raw.p46;
        tracks[1] = R.raw.p52;
        tracks[2] = R.raw.p55;
        mediaPlayer = MediaPlayer.create(getApplicationContext(), tracks[currentTrack]);
        mediaPlayer.setOnCompletionListener(this);
        mediaPlayer.start();
    }

    public void onCompletion(MediaPlayer arg0) {
        arg0.release();
        if (currentTrack < tracks.length) {
            currentTrack++;
            arg0 = MediaPlayer.create(getApplicationContext(), tracks[currentTrack]);
            arg0.setOnCompletionListener(this);
            arg0.start();
        }
    }

Answer 1

更改此：

public void onCompletion(MediaPlayer arg0) {
        arg0.release();
        if (currentTrack < tracks.length) {
            currentTrack++;
            arg0 = MediaPlayer.create(getApplicationContext(), tracks[currentTrack]);
            arg0.setOnCompletionListener(this);
            arg0.start();
        }
    }

至 ：

public void onCompletion(MediaPlayer arg0) {
        arg0.release();
        currentTrack++;
        if (currentTrack < tracks.length) {

            arg0 = MediaPlayer.create(getApplicationContext(), tracks[currentTrack]);
            arg0.setOnCompletionListener(this);
            arg0.start();
        }
    }

基本上你在最后一个currentTrack上得到一个ArrayIndexOutofBoundException becoz是3，并且索引3上没有项目，即第4个项目