AsyncTask的简单使用

 1 package com.zzw.life;
 2 
 3 import android.app.Activity;
 4 import android.os.AsyncTask;
 5 import android.os.Bundle;
 6 
 7 public class MainActivity extends Activity {
 8 
 9     @Override
10     protected void onCreate(Bundle savedInstanceState) {
11         super.onCreate(savedInstanceState);
12         setContentView(R.layout.activity_main);
13         
14         /*
15          * 运行TestAsyncTask
16          */
17         new TestAsyncTask().execute();
18     }
19 
20     private class TestAsyncTask extends AsyncTask{
21 
22         //一般用于初始化，首先运行
23         @Override
24         protected void onPreExecute() {
25             // TODO Auto-generated method stub
26             super.onPreExecute();
27         }
28         //一般处理耗时操作，第二运行
29         @Override
30         protected Object doInBackground(Object... params) {
31             return null;
32         }
33         /*
34          * 一般用于处理UI界面变化，最后运行
35          * result是上面doInBackground返回值
36          */
37         @Override
38         protected void onPostExecute(Object result) {
39             // TODO Auto-generated method stub
40             super.onPostExecute(result);
41         }
42         
43         
44         
45     }
46     
47     
48 }