Timer timer;
void onCreate(){
 ......
TimerTask task = new TimerTask(){  
public void run(){  
 // 在此处添加执行的代码  
}  
};  
timer = new Timer(); 
timer.schedule(task, 1000);//开启定时器，delay 1s后执行task 
}
void onDestroy(){
......
timer.cancel();//销毁定时器
}

void onCreate(){ 
  ......
  Handler handler = new Handler(); 
  Runnable runnable = new Runnable(){ 
   @Override 
   public void run() { 
    // TODO Auto-generated method stub 
    // 在此处添加执行的代码 
    handler.postDelayed(this, 50);// 50ms后执行this，即runable 
   }  
  };  
  handler.postDelayed(runnable, 50);// 打开定时器，50ms后执行runnable操作 
}
void onDestroy(){ 
 ......
 handler.removeCallbacks(this);// 关闭定时器处理 
}

void onCreate(){ 
......
Handler handler = new Handler();    
 Runnable runnable = new Runnable(){  
 @Override 
 public void run() { 
   // TODO Auto-generated method stub    
   // 在此处添加执行的代码 
　　　　　　　　　　　　　　doSomeThing();
   handler.removeCallbacks(this); //移除定时任务  
     }   
 }; 
 handler.postDelayed(runnable, 50);// 打开定时器，50ms后执行runnable 
}

// 以下的代码是<<足球即时比分>>中的代码片段.
 public static AlarmManagerUtil{
     public static AlarmManager getAlarmManager(Context ctx){
     return (AlarmManager) ctx.getSystemService(Context.ALARM_SERVICE);
   }
   /**
    * 指定时间后进行更新赛事信息(有如闹钟的设置)
   * 注意: Receiver记得在manifest.xml中注册
     * 
   * @param ctx
   */
   public static void sendUpdateBroadcast(Context ctx){
     Log.i("score", "send to start update broadcase,delay time :"+);
     larmManager am = getAlarmManager(ctx);
       // 秒后将产生广播,触发UpdateReceiver的执行,这个方法才是真正的更新数据的操作主要代码
     Intent i = new Intent(ctx, UpdateReceiver.class); 
     PendingIntent pendingIntent = PendingIntent.getBroadcast(ctx, , i, );
     am.set(AlarmManager.RTC, System.currentTimeMillis()+, pendingIntent)
 }
   /**
   * 取消定时执行(有如闹钟的取消)
   * 
   * @param ctx
   */    
   public static void cancelUpdateBroadcast(Context ctx){
     AlarmManager am = getAlarmManager(ctx);
     Intent i = new Intent(ctx, UpdateReceiver.class);
     PendingIntent pendingIntent = PendingIntent.getBroadcast(ctx, , i, );
     am.cancel(pendingIntent);
   }
 }
 // 更新数据库的广播接收器
 public static class UpdateReceiver extends BroadcastReceiver{
     public void onReceive(Context context, Intent intent) {
       Toast.makeText(context, "更新比分数据", Toast.LENGTH_LONG).show();
       // 设置全局定时器(闹钟) 秒后再发广播通知本广播接收器触发执行.
       // 这种方式很像JavaScript中的 setTimeout(xxx,)
       AlarmManagerUtil.sendUpdateBroadcast(context);
     }
   }

publicstaticvoid sendUpdateBroadcastRepeat(Context ctx){
 Intent intent =new Intent(ctx, UpdateReceiver.class);
 PendingIntent pendingIntent = PendingIntent.getBroadcast(ctx, 0, intent, 0);
 //开始时间
 long firstime=SystemClock.elapsedRealtime();
 AlarmManager am = (AlarmManager) ctx.getSystemService(ALARM_SERVICE);
　　//60秒一个周期，不停的发送广播
 am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, firstime, 60*1000, pendingIntent);
}

/**
 * 取消定时执行(有如闹钟的取消)
 * 
 * @param ctx
 */publicstaticvoid cancelUpdateBroadcast(Context ctx){
   AlarmManager am = getAlarmManager(ctx);
   // 取消时注意UpdateReceiver.class必须与设置时一致,这样才要正确取消
   Intent i = new Intent(ctx, UpdateReceiver.class); 
   PendingIntent pendingIntent = PendingIntent.getBroadcast(ctx, 0, i, 0);
   am.cancel(pendingIntent);
  }
}