android秒表计时代码

package com.TestDemo;

import java.util.Timer;
import java.util.TimerTask;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.widget.TextView;

public class TestDemo extends Activity {
   
public TimerHandler timerHandler;
public Timer timer;
public MyTimerTask   task;
public int m_nTime = 0;//计时
public TextView mtimeshow=null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mtimeshow=(TextView)findViewById(R.id.time_show);
        timer=new Timer(true);
task=new MyTimerTask(this);
timer.schedule(task, 0, 1000 );
timerHandler = new TimerHandler(this);
bindService(null, null, m_nTime);
    }
     
    private class MyTimerTask extends TimerTask
{
private TestDemo me;
public MyTimerTask(TestDemo p)
{
me=p;
}
public void run()
{
me.m_nTime++;
me.timerHandler.sendEmptyMessage(0);      
}
}
public class TimerHandler extends Handler
{
private TestDemo me;
public TimerHandler(TestDemo m)
{
me=m;
}
@Override
public void handleMessage(Message msg)
{
me.mtimeshow.setText(me.m_nTime+"");
}
}
}