等到异步任务完成其工作-Waitingtilltheasynctaskfinishitswork

99  

wait until this call is finish its executing

等到这个电话完成它的执行

You will need to call AsyncTask.get() method for getting result back and make wait until doInBackground execution is not complete. but this will freeze Main UI thread if you not call get method inside a Thread.

您将需要调用AsyncTask.get（）方法来获取结果，并等待doInBackground执行未完成。但如果不在Thread中调用get方法，这将冻结Main UI线程。

To get result back in UI Thread start AsyncTask as :

要在UI中获得结果，请将Thread启动AsyncTask：

String str_result= new RunInBackGround().execute().get();

30  

Although optimally it would be nice if your code can run parallel, it can be the case you're simply using a thread so you do not block the UI thread, even if your app's usage flow will have to wait for it.

虽然最佳情况下，如果您的代码可以并行运行会很好，但您可能只是使用线程，因此您不会阻止UI线程，即使您的应用程序的使用流程必须等待它。

You've got pretty much 2 options here;

你在这里有2个选择;

1. You can execute the code you want waiting, in the AsyncTask itself. If it has to do with updating the UI(thread), you can use the onPostExecute method. This gets called automatically when your background work is done.

   您可以在AsyncTask本身中执行您想要等待的代码。如果它与更新UI（线程）有关，则可以使用onPostExecute方法。当您的后台工作完成时，会自动调用此方法。

2. If you for some reason are forced to do it in the Activity/Fragment/Whatever, you can also just make yourself a custom listener, which you broadcast from your AsyncTask. By using this, you can have a callback method in your Activity/Fragment/Whatever which only gets called when you want it: aka when your AsyncTask is done with whatever you had to wait for.

   如果由于某种原因你被迫在Activity / Fragment / Whatever中执行它，你也可以自己制作一个自定义监听器，你可以从你的AsyncTask广播。通过使用它，你可以在Activity / Fragment / Whatever中有一个回调方法，只有当你想要它时才会被调用：也就是当你的AsyncTask用你必须等待的任何东西完成时。

13  

In your AsyncTask add one ProgressDialog like:

在你的AsyncTask中添加一个ProgressDialog，如：

private final ProgressDialog dialog = new ProgressDialog(YourActivity.this);

you can setMessage in onPreExecute() method like:

你可以在onPreExecute（）方法中设置setMessage，如：

this.dialog.setMessage("Processing..."); 
this.dialog.show();

and in your onPostExecute(Void result) method dismiss your ProgressDialog.

并在您的onPostExecute（Void结果）方法中关闭ProgressDialog。

11  

AsyncTask have four methods..

AsyncTask有四种方法..

onPreExecute  -- for doing something before calling background task in Async

doInBackground  -- operation/Task to do in Background

onProgressUpdate  -- it is for progress Update

onPostExecute  -- this method calls after asyncTask return from doInBackground.

you can call your work on onPostExecute() it calls after returning from doInBackground()

你可以在从doInBackground（）返回后调用onPostExecute（）调用你的工作

onPostExecute is what you need to Implement.

onPostExecute是您需要实现的。