Android媒体播放器没有完全寻求进展

Posted 2023-02-25

【中文标题】Android媒体播放器没有完全寻求进展

【英文标题】：Android mediaplayer not progress seeking completely

【发布时间】：2013-04-25 06:08:34

【问题描述】：

我正在尝试使用媒体播放器播放 .wav 文件。实际上，到目前为止，我已经完成了如下所示。它正在正确播放更新进度，但问题媒体播放器并未完全搜索。媒体播放器在文件总持续时间之前停止提供进度并停止更新进度。我还实现了 OnComplete 侦听器也没有收到回调。这是我的代码，任何人都可以发现我失踪的地方。

public void playAudioFile() 
    try 

        mMediaPlayer.reset();
        setMediaPlayerSource();
        mMediaPlayer.prepare();
        mMediaPlayer.start();
        mMediaPlayer.setOnCompletionListener(new OnCompletionListener() 

            @Override
            public void onCompletion(MediaPlayer arg0) 
                Graphbar.setProgress(mMediaPlayer.getDuration());
            
        );
        bPlay.setBackgroundResource(R.drawable.pause_selector);

        new Thread(new Runnable() 
            @Override
            public void run() 
                System.out.println("Playing");
                updateProgressBar();
            
        ).start();

     catch (IllegalArgumentException e) 
        e.printStackTrace();
     catch (IllegalStateException e) 
        e.printStackTrace();
     catch (IOException e) 
        e.printStackTrace();
    

    public void updateProgressBar() 
    Graphbar.setProgress(0);

    Graphbar.setMax(mMediaPlayer.getDuration());
    mHandler.postDelayed(mUpdateTimeTask, 0);

private Runnable mUpdateTimeTask = new Runnable() 
    public void run() 
        if(mMediaPlayer.isPlaying())
        long totalDuration = Graphbar.getMax();
        long currentDuration =mMediaPlayer.getCurrentPosition();

        String TotalDur = Utilities.milliSecondsToTimer(totalDuration);

        tvTimeRight.setText(TotalDur);
        tvTimeLeft.setText(""+ Utilities.milliSecondsToTimer(currentDuration));

        System.out.println(currentDuration+"/"+totalDuration);
        Graphbar.setProgress((int)currentDuration); 
        mHandler.postDelayed(this, 1);
        
    
;
private void setMediaPlayerSource() 
        String audioFile = getFilename();
        try 
            mMediaPlayer.setDataSource(audioFile);
         catch (IllegalArgumentException e) 
            e.printStackTrace();
         catch (SecurityException e) 
            e.printStackTrace();
         catch (IllegalStateException e) 
            e.printStackTrace();
         catch (IOException e) 
            e.printStackTrace();
        
    

【参考方案1】：

总时长使用 mediaplayer.getduration。 从可运行处理程序中删除不必要的代码，因为它会为你的搜索栏创建负载。因为每秒你都在计算一些东西并根据该计算更新布局。

我建议你使用 chronometer android 视图。

public void playAudioFile() 
    try 

        mMediaPlayer.reset();
        setMediaPlayerSource();
        mMediaPlayer.prepare();
        mMediaPlayer.start();
        mMediaPlayer.setOnCompletionListener(new OnCompletionListener() 

            @Override
            public void onCompletion(MediaPlayer arg0) 
                Graphbar.setProgress(mMediaPlayer.getDuration());
            
        );
        bPlay.setBackgroundResource(R.drawable.pause_selector);
        //set this only for once , because for one song total duration is always constant.

     updateProgressBar();

    public void updateProgressBar() 
    Graphbar.setProgress(0); 

    Graphbar.setMax(mMediaPlayer.getDuration());
    mHandler.postDelayed(mUpdateTimeTask, 0);

    long totalDuration = mMediaPlayer.getDuration();
    String TotalDur = Utilities.milliSecondsToTimer(totalDuration);

        tvTimeRight.setText(TotalDur);

private Runnable mUpdateTimeTask = new Runnable() 
    public void run() 

        if(mMediaPlayer.isPlaying())
        //long totalDuration = mMediaPlayer.getDuration();=> no need of calculating total time and updating it to seekbar at every second 

        long currentDuration =mMediaPlayer.getCurrentPosition();


        tvTimeLeft.setText(""+ Utilities.milliSecondsToTimer(currentDuration));

        System.out.println(currentDuration+"/"+totalDuration);
        Graphbar.setProgress((int)currentDuration); 
        mHandler.postDelayed(this, 1);
        
    
;
private void setMediaPlayerSource() 
        String audioFile = getFilename();
        try 
            mMediaPlayer.setDataSource(audioFile);
         catch (IllegalArgumentException e) 
            e.printStackTrace();
         catch (SecurityException e) 
            e.printStackTrace();
         catch (IllegalStateException e) 
            e.printStackTrace();
         catch (IOException e) 
            e.printStackTrace();