android - 如何从android中的线程获取结果？

Question

我有一个主类，一个工作线程类，它们是分开的。在主线程中，我将输入传递给工作线程并要求它工作。完成后，我希望它将结果发送回主线程。我该怎么做？

public class MainActivity extends Activity{
     Handler showResults = new Handler(){
         public void handleMessage(Message msg){
               //Show results on textview.
         }

     workerThread worker = new workThread();
     worker.setInput(input);
    }

}

工作线程:

public class workerThread extends Thread{
       int result = 0;
       public void run(){
          //when receive input from main class. it will work
          .............
         //after working, it return result, and i want it to send this result 
         //to Handler in main activity, so, i can display that result on textview.
       }

      //function to get input
      public void setInput(){
        //get input form main class to work
      }
}

谁知道答案请告诉我。谢谢。:)

Answer 1

也许你应该试试 AsynTask，它就是为此而设计的:

 private class MyThread extends AsyncTask<Params, Progress, Result> {
     protected Long doInBackground(URL... urls) {
            // Calculate and return retulst
     }


     protected void onPostExecute(Long result) {
         // This is executed in main Thread, use the result
     }
 }  

你像这样执行这个线程:

new MyThread().execute(params, ...);

参见 http://developer.android.com/reference/android/os/AsyncTask.html