周期性执行某个动作

1、使用TimerTask定时开始周期性执行某个动作

scheduleAtFixedRate(TimerTask task, long delay, long period)

Schedule a task for repeated fixed-rate execution after a specific delay has passed.

Parameters

task	the task to schedule.
delay	amount of time in milliseconds before first execution.
period	amount of time in milliseconds between subsequent executions.

java代码：

        
        //周期性的上传速度
        Timer timer = new Timer();
        TimerTask timerTask=new TimerTask() {
            
            @Override
            public void run() {
                // TODO Auto-generated method stub
                Log.i(TAG, "平均速度为");
            }
        };
        timer.scheduleAtFixedRate(timerTask, 0, 5000);
        
    }

2、使用Handler 

//初始化为了全局使用

Handler handler=null;
Runnable update=null;

-------------------------------------

try{
   
   handler=new Handler();
   update=new Runnable()
   {

    @Override
    public void run() {
     // TODO Auto-generated method stub

    // do sth
     handler.postDelayed(update, 1000); //1秒后将再次调用
    }
    
   };
   
   handler.post(update); //真正开始的指令；

   handler.removeCallbacks(update);//停止指令

Done！