相关疑难解决方法(0)

我在Android中构建了一个简单的音乐播放器.每首歌曲的视图都包含一个SeekBar,实现方式如下:

public class Song extends Activity implements OnClickListener,Runnable {
    private SeekBar progress;
    private MediaPlayer mp;

    // ...

    private ServiceConnection onService = new ServiceConnection() {
          public void onServiceConnected(ComponentName className,
            IBinder rawBinder) {
              appService = ((MPService.LocalBinder)rawBinder).getService(); // service that handles the MediaPlayer
              progress.setVisibility(SeekBar.VISIBLE);
              progress.setProgress(0);
              mp = appService.getMP();
              appService.playSong(title);
              progress.setMax(mp.getDuration());
              new Thread(Song.this).start();
          }
          public void onServiceDisconnected(ComponentName classname) {
              appService = null;
          }
    };

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.song);

        // ...

        progress = (SeekBar) findViewById(R.id.progress);

        // ...
    }

    public void run() { …

在我的Android应用程序中,我正在使用Timer schedule.but得到Timer-0致命异常如下所示.我可以删除它.我还提到下面的代码 -

01-28 13:44:41.142: E/AndroidRuntime(1307): FATAL EXCEPTION: Timer-0
01-28 13:44:41.142: E/AndroidRuntime(1307):android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
01-28 13:44:41.142: E/AndroidRuntime(1307):     at android.view.ViewRoot.checkThread(ViewRoot.java:2932)
01-28 13:44:41.142: E/AndroidRuntime(1307):     at android.view.ViewRoot.invalidateChild(ViewRoot.java:642)
01-28 13:44:41.142: E/AndroidRuntime(1307):     at android.view.ViewRoot.invalidateChildInParent(ViewRoot.java:668)
01-28 13:44:41.142: E/AndroidRuntime(1307):     at android.view.ViewGroup.invalidateChild(ViewGroup.java:2511)
01-28 13:44:41.142: E/AndroidRuntime(1307):     at android.view.View.invalidate(View.java:5279)
01-28 13:44:41.142: E/AndroidRuntime(1307):     at android.view.View.setBackgroundDrawable(View.java:7626)
01-28 13:44:41.142: E/AndroidRuntime(1307):     at android.view.View.setBackgroundResource(View.java:7535)
01-28 13:44:41.142: E/AndroidRuntime(1307):     at com.example.iqtest.PlayGame$1.run(PlayGame.java:61)
01-28 13:44:41.142: E/AndroidRuntime(1307):     at java.util.Timer$TimerImpl.run(Timer.java:284)

和代码是 -

protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated …