Android SeekBar控制MediaPlayer进度

Question

我有一个SeekBar,它显示正确的MediaPlayer进度.但是,我遇到了麻烦 - 如果我在某处找到滚动框,它只会返回播放音频文件的位置.

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);

    }
}

那么,onProgressChanged还不足以让人SeekBar控制MediaPlayer？

我应该添加/更正以允许搜索？

谢谢

UPDATE

我发现onProgressChanged从来没有被某种原因引用过.但是我无法弄清楚为什么

Answer 1

问题是seekBar.setOnSeekBarChangeListener(this);所以把它放在你的AudioControl()方法中.....你没有设置oncheckchangedlistner到你的搜索栏....

Answer 2

尝试使用以下代码:

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

Answer 3

你必须在里面包含搜索条方法onCreate.我遇到了同样的问题,之后就可以了.

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