刷新活动 [英] Refreshing the activity

问题描述

我正在使该应用在其中用户将能够到c提供给他的常规服务。为了这个，我现在用的是网站，管理员就能够更新服务。用户从Android将能够通过解析服务器上可用的XML文件，以获得服务列表。

i am making the app in which user will be able to c the routine services available to him . For this i am using the website where the admin will be able to update the services . User from android will be able to get the list of services by parsing the xml file available on the server .

我想知道的是，事情有没有什么办法的活动自动刷新自身和用户可c。通过管理员的服务做了更新。

The thing i am wondering about is that is there any way the activity automatically refresh itself and user can c the updates done in the services by admin.

感谢

推荐答案

如果你需要做定期一些工作，你应该有一个看的处理器和的 AsyncTask的。总体方案如下：

If you need to do some job on a regular basis, you should have a look at the Handler and the AsyncTask. The general scheme is the following:

 //This handler launches the task
 private final Handler handler = new Handler();

 //This is a task which will be executed
 private class RefreshTask extends AsyncTask<String, Void, Object> {
     protected Object doInBackground(String... params) {
         //Do refreshing here
     }

     protected void onPostExecute(Object result) {
         //Update UI here
     }
 }

 //This is a Runnable, which will launch the task
 private final Runnable refreshRunnable = new Runnable() {
     public void run() {
         new RefreshTask(param1, param2).execute();
         handler.postDelayed(refreshRunnable, TIME_DELAY);
     }
 };

然后调用 handler.post（refreshRunnable）当你要开始更新。要取消他们，叫 handler.removeCallbacks（refreshRunnable）。我要指出，当然，我没有测试此code，但它应该给一个总体思路做什么。

Then you call handler.post(refreshRunnable) when you want to start updates. To cancel them, call handler.removeCallbacks(refreshRunnable). I should note, of course, that I haven't tested this code, but it should give a general idea what to do.

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