如何在 setNextMediaPlayer 循环期间暂停 Android 媒体播放器？

Question

我正在使用这个 Media-Player-Looping 概念：loop-concept 我不知道如何暂停这个循环。当我使用 setNextMediaPlayer(null) 时，它将在完成当前音频文件后暂停。但为时已晚。有人给我提示吗？

编辑：

这是我的代码：

@Override
protected void onCreate(Bundle savedInstanceState) {
    ...
    mp = new MediaPlayer(); 
    mp2 = new MediaPlayer();    //workarround f gapless looping
    setDisc("classic");
    ...
    throttle = (Switch) findViewById(R.id.throttle);
    throttle.setOnCheckedChangeListener(new OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            setDisc(curTitle);
        }
    });
    throttle.setChecked(false);
    ...
    onoff = (ToggleButton) findViewById(R.id.onoff);
    onoff.setChecked(false);
    onoff.setOnClickListener(this);
    ...
}

public void setDisc(String s){
    String tmp = "";
    if(throttle.isEnabled()==true && throttle.isChecked())
        tmp="2";
    myUri = getUri(s+tmp);
    curTitle=s;
    curPow=tmp;
    try {
        mp.reset();
        mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
        mp.setDataSource(context, myUri);
        mp.prepareAsync();

        mp2.reset();
        mp2.setAudioStreamType(AudioManager.STREAM_MUSIC);
        mp2.setDataSource(context, myUri);
        mp2.prepareAsync();
        mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mp2.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                    @Override
                    public void onPrepared(MediaPlayer mp) {
                        setMyLoop();
                        play();
                    }
                });
            }
        });
    } catch (...) {
        ...Exception Handling...
    }
}

public void setMyLoop(){
    /*Gapless Looping*/
    final AssetFileDescriptor afd = getResources().openRawResourceFd(getRawId(this, curTitle.concat(curPow)));
    mp.setNextMediaPlayer(mp2);
    mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mediaPlayer) {
            mediaPlayer.reset();
            try {
                mediaPlayer.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
                mediaPlayer.prepare();
            } catch (Exception e) {
                Toast.makeText(context, getResources().getString(R.string.error1), Toast.LENGTH_LONG).show();
            }
            mp2.setNextMediaPlayer(mp);
        }
    });
    mp2.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mediaPlayer) {
            mediaPlayer.reset();
            try {
                mediaPlayer.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
                mediaPlayer.prepare();
            } catch (Exception e) {
                Toast.makeText(context, getResources().getString(R.string.error2), Toast.LENGTH_LONG).show();
            }
            mp.setNextMediaPlayer(mp2);
        }
    });
}

public void play(){
    if(onoff.isChecked()){
        mp.start();
    }
}

@Override
public void onClick(View v) {
    if(v == onoff){     
        if(onoff.isChecked()==false){
            mp.setNextMediaPlayer(null);
            mp2.setNextMediaPlayer(null);
        }
        else{
            mp.setNextMediaPlayer(mp2);
            mp2.setNextMediaPlayer(mp);
            mp.start();
        }
    }
    ...
}

Answer 1

我想通了：

/*Media Player stopping*/
public void mpAnhalten(){
    if(mp2.isPlaying()){
        mp2.pause();
        curMP=true;
    }
    else {
        if(mp.isPlaying()){
            mp.pause();
        }
        curMP=false;
    }
}

/*Media Player starting*/
public void mpStarten(){
    if(curMP==true)
        mp2.start();
    else
        mp.start();
}

并且我将所有 prepareAsync() 都更改为 prepare()。现在可以使用了。

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