private Timer cTime;
cTime = new Timer();
    	cTime.schedule(new TimerTask() {

		      @Override
		      public void run() {
		       runOnUiThread(new Runnable() {
		    	     @Override
				     public void run() {
					 //something
					   });
		      }
    	}, 0, 400);//refresh rate time interval (ms)
    }