Android发送post请求

1. android 向web服务器发送post请求并获取结果，因为 需要访问到网络必须要有权限，先在AndroidManifest.xml中加入如下配置：
2. <uses-permission android:name="android.permission.INTERNET" /> 
3. 
   
4. 
   
5. package httppost.pack; 
6.  
7. import java.util.ArrayList; 
8. import java.util.List; 
9.  
10. import org.apache.http.HttpResponse; 
11. import org.apache.http.NameValuePair; 
12. import org.apache.http.client.entity.UrlEncodedFormEntity; 
13. import org.apache.http.client.methods.HttpPost; 
14. import org.apache.http.impl.client.DefaultHttpClient; 
15. import org.apache.http.message.BasicNameValuePair; 
16. import org.apache.http.protocol.HTTP; 
17. import org.apache.http.util.EntityUtils; 
18.  
19. import android.app.Activity; 
20. import android.os.Bundle; 
21. import android.widget.TextView; 
22.  
23. public class AndroidHttpPost extends Activity { 
24.     /** Called when the activity is first created. */ 
25.     String action="http://www.beijibear.com/android_post.php"; 
26.     HttpPost httpRequest=null; 
27.     List <NameValuePair> params=null; 
28.     HttpResponse httpResponse; 
29.     TextView tv=null; 
30.     @Override 
31.     public void onCreate(Bundle savedInstanceState) { 
32.         super.onCreate(savedInstanceState); 
33.         setContentView(R.layout.main); 
34.         tv=(TextView)findViewById(R.id.textView1); 
35.         /*建立HttpPost连接*/ 
36.         httpRequest=new HttpPost(action); 
37.         /*Post运作传送变数必须用NameValuePair[]阵列储存*/ 
38.         params=new ArrayList<NameValuePair>(); 
39.         params.add(new BasicNameValuePair("username","beijibear")); 
40.          
41.         try { 
42.             //发出HTTP request 
43.             httpRequest.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8)); 
44.             //取得HTTP response 
45.             httpResponse=new DefaultHttpClient().execute(httpRequest); 
46.             //若状态码为200 
47.             if(httpResponse.getStatusLine().getStatusCode()==200){ 
48.                 //取出回应字串 
49.                 String strResult=EntityUtils.toString(httpResponse.getEntity()); 
50.                 tv.setText(strResult); 
51.             }else{ 
52.                 tv.setText("Error Response"+httpResponse.getStatusLine().toString()); 
53.             } 
54.         } catch (Exception e) { 
55.             // TODO Auto-generated catch block 
56.             tv.setText(e.getMessage().toString()); 
57.         } 
58.     } 
59. } 

原文地址：http://blog.163.com/xiang_zhifang/blog/static/115749500201212945739636/