for循环使用原始音乐阵列android

Question

我目前正在尝试创建一个for循环,它将播放一个原始文件,当它完成后,它将继续到数组中的下一个声音文件.它目前正在播放所有文件.关于我如何解决这个问题的任何建议？我认为on on completion listener可能存在问题,但不确定.谢谢.

我的代码:

package com.example.mediatest;



    int[] myMusic = {R.raw.caralarm, R.raw.phonebusysignal, R.raw.phoneoffhook};



    MediaPlayer mp = new MediaPlayer();



   for (int y =0; y<3; y++){
       mp = MediaPlayer.create(this, myMusic[y]);
       mp.start();
       mp.setOnCompletionListener(new OnCompletionListener(){

        @Override
        public void onCompletion(MediaPlayer mp) {
            // TODO Auto-generated method stub

        }

       });
   }

Answer 1

您可以创建单独的MediaPlayer对象,首先启动,然后onCompletion启动下一个.对于可扩展的解决方案,请尝试以下方法:

int[] myMusic = {R.raw.caralarm, R.raw.phonebusysignal, R.raw.phoneoffhook};
int mCompleted = 0;

MediaPlayer mp = MediaPlayer.create(this, myMusic[0]);

mp.setOnCompletionListener(new OnCompletionListener() {
    @Override
    public void onCompletion(MediaPlayer mp) {
        mCompleted++;
        mp.reset();
        if (mCompleted < myMusic.length()) {
            try {
                AssetFileDescriptor afd = getResources().openRawResourceFd(myMusic[mCompleted]);
                if (afd != null) {
                    mp.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
                    afd.close();
                    mp.prepare();
                }
            } catch (Exception ex) {
                // report a crash
            }
        } else {
            // done with media player
            mp.release();
            mp = null;
        }
    }
});

mp.start();

一种更简单的方法(稍微浪费资源)是:

int[] myMusic = {R.raw.caralarm, R.raw.phonebusysignal, R.raw.phoneoffhook};
int mNext;
OnCompletionListener mListener = new OnCompletionListener() {
    @Override
    public void onCompletion(MediaPlayer mp) {
        mp.release();
        startNextFile();
    }
};

@Override
public void onCreate() {
    // usual onCreate stuff here, then...

    // either here or whenever you want to start the sequence
    mNext = 0;
    startNextFile();
}

void startNextFile() {
    if (mNext < myMusic.length) {
        MediaPlayer mp = MediaPlayer.create(this, myMusic[mNext++]);
        mp.setOnCompletionListener(mListener);
        mp.start();
    }
}