Android控件开发之Chronometer（转）

1 android:format    定义时间的格式如: hh:mm:ss  

1 setBase(long base)      //设置倒计时定时器  
2 setFormat(String format)    //设置显示时间的格式   
3 start()             //开始计时  
4 stop()              //停止计时  
5                                 //当计时器改变时调用  
6 setOnChronometerTickListener(Chronometer.OnChronometerTickListener listener) 

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   
 2     android:orientation="vertical"  
 3     android:layout_width="wrap_content"   
 4     android:layout_height="wrap_content">  
 5   
 6 <Chronometer  
 7     android:id="@+id/chronometer"   
 8     android:layout_width="wrap_content"  
 9     android:layout_height="wrap_content"/>  
10   
11     <LinearLayout   
12         android:layout_width="wrap_content"   
13         android:layout_height="wrap_content">  
14       
15         <Button   
16             android:onClick="onStart"   
17             android:text="开始计时"   
18             android:layout_width="wrap_content"   
19             android:layout_height="wrap_content"/>  
20           
21         <Button   
22             android:onClick="onStop"   
23             android:text="停止计时"   
24             android:layout_width="wrap_content"   
25             android:layout_height="wrap_content"/>  
26           
27         <Button   
28             android:onClick="onReset"   
29             android:text="重置"   
30             android:layout_width="wrap_content"   
31             android:layout_height="wrap_content"/>     
32     </LinearLayout>  
33 </LinearLayout> 

ackage com.sx.Chronometer;  
  
import android.app.Activity;  
import android.os.Bundle;  
import android.os.SystemClock;  
import android.view.View;  
import android.widget.Chronometer;  
  
public class ChronometerActivity extends Activity   
{  
    private Chronometer chronometer = null;  
      
    /** Called when the activity is first created. */  
    @Override  
    public void onCreate(Bundle savedInstanceState)  
    {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
          
        chronometer = (Chronometer) findViewById(R.id.chronometer);  
        chronometer.setFormat("计时：%s");  
    }  
      
    public void onStart(View view)   
    {  
         chronometer.start();  
    }  
      
    public void onStop(View view)   
    {  
         chronometer.stop();  
    }  
      
    public void onReset(View view)  
    {  
         chronometer.setBase(SystemClock.elapsedRealtime());  
    }  
}