java 每隔一段时间运行某程序

timer = new Timer();

timer.schedule(new RemindTask(),0, 1000);

 private class RemindTask extends TimerTask {
         public void run() {
        dongImg.setBackgroundResource(R.drawable.donghuaimag2);
        dongImg.setBackgroundResource(R.drawable.donghuaimag3);
            System.out.println("ss");
         }
    }

timer.cancel();