如何在固定的时间间隔后重复执行异步任务

Question

如何在一段时间间隔之后重复执行异步任务,就像Timer一样...实际上我正在开发一个应用程序,它会自动从服务器下载所有最新的未读问候语,为此我必须在修复后检查服务器的更新时间间隔....我知道可以通过计时器轻松完成,但我想使用异步任务,我认为对Android应用程序更有效.

Answer 1

public void callAsynchronousTask() {
    final Handler handler = new Handler();
    Timer timer = new Timer();
    TimerTask doAsynchronousTask = new TimerTask() {       
        @Override
        public void run() {
            handler.post(new Runnable() {
                public void run() {       
                    try {
                        PerformBackgroundTask performBackgroundTask = new PerformBackgroundTask();
                        // PerformBackgroundTask this class is the class that extends AsynchTask 
                        performBackgroundTask.execute();
                    } catch (Exception e) {
                        // TODO Auto-generated catch block
                    }
                }
            });
        }
    };
    timer.schedule(doAsynchronousTask, 0, 50000); //execute in every 50000 ms
}

Answer 2

  //Every 10000 ms   
       private void doSomethingRepeatedly() {
      Timer timer = new Timer();
      timer.scheduleAtFixedRate( new TimerTask() {
            public void run() {

                  try{

                     new SendToServer().execute(); 

                  }
                  catch (Exception e) {
                      // TODO: handle exception
                  }

             }
            }, 0, 10000);
                     }