Android的搜索栏来控制MediaPlayer的进步 [英] Android SeekBar to control MediaPlayer progress

问题描述

我有一个搜索栏，它会显示正确的MediaPlayer 进展。不过，我有麻烦与追求 - 如果我追求的滚动框的地方它只是返回在哪里的音频文件播放的位置。

I have a SeekBar, it displays correctly MediaPlayer progress. However, I have troubles with seeking - if I seek scroll box somewhere it just returns on the position where audio file is playing.

public class EntityPageActivity extends Activity implements Runnable, OnClickListener, OnSeekBarChangeListener{
    private SeekBar seekBar;
    private Button startMedia;
    private Button pauseMedia;
    private MediaPlayer mp;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.entity_page);             

        AudioControl();         

    }

    public void AudioControl(){
        seekBar = (SeekBar) findViewById(R.id.seekBar);
        startMedia = (Button) findViewById(R.id.play);
        pauseMedia = (Button) findViewById(R.id.pause);
        startMedia.setOnClickListener(this);
        pauseMedia.setOnClickListener(this); 
    }

    public void run() {
        int currentPosition= 0;
        int total = mp.getDuration();
        while (mp!=null && currentPosition<total) {
            try {
                Thread.sleep(1000);
                currentPosition= mp.getCurrentPosition();
            } catch (InterruptedException e) {
                return;
            } catch (Exception e) {
                return;
            }            
            seekBar.setProgress(currentPosition);
        }
    }

    public void onClick(View v) {
        if (v.equals(startMedia)) {
            if (mp != null && mp.isPlaying()) return;
            if(seekBar.getProgress() > 0) {
                mp.start();
                return;
            }
            mp = MediaPlayer.create(EntityPageActivity.this, R.raw.gl1);
            mp.start();                     
            seekBar.setProgress(0);
            seekBar.setMax(mp.getDuration());
            new Thread(this).start();
        }

        if (v.equals(pauseMedia) && mp!=null) {
            mp.pause();
        }       

    }

    public void onStartTrackingTouch(SeekBar seekBar) {
    }

    public void onStopTrackingTouch(SeekBar seekBar) {
    }

    public void onProgressChanged(SeekBar seekBar, int progress,
            boolean fromUser) {
        if(fromUser) mp.seekTo(progress);

    }
}

因此​​， onProgressChanged 是不足以让搜索栏来控制的MediaPlayer ？

Thus, onProgressChanged isn't enough to allow SeekBar to control MediaPlayer?

我应该添加/正确的，让求？

What should I add/correct to allow seeking?

感谢

更新

我发现 onProgressChanged 永远不会被某些原因调用。不过，我想不通为什么

I found out that onProgressChanged is never invoked by some reason. However I can't figure out why

推荐答案

现在的问题是 seekBar.setOnSeekBarChangeListener（本）; 所以，把它放在你的音频控制（）方法..... 你不设置 oncheckchangedlistner 您的搜索栏....

The problem is seekBar.setOnSeekBarChangeListener(this); So put it in Your AudioControl() Method..... You dont set oncheckchangedlistner to your seekbar....

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