Android用Apache HttpClient 实现POST和Get请求

类 : org.apache.http.client.HttpClient;

1.  GET实现

Java代码  

1. package com.yarin.android.Examples_08_02;  
2.   
3. import java.io.IOException;  
4. import org.apache.http.HttpResponse;  
5. import org.apache.http.HttpStatus;  
6. import org.apache.http.client.ClientProtocolException;  
7. import org.apache.http.client.HttpClient;  
8. import org.apache.http.client.methods.HttpGet;  
9. import org.apache.http.impl.client.DefaultHttpClient;  
10. import org.apache.http.util.EntityUtils;  
11. import android.app.Activity;  
12. import android.content.Intent;  
13. import android.os.Bundle;  
14. import android.view.View;  
15. import android.widget.Button;  
16. import android.widget.TextView;  
17.   
18. public class Activity02 extends Activity {  
19.     /** Called when the activity is first created. */  
20.     @Override  
21.     public void onCreate(Bundle savedInstanceState) {  
22.         super.onCreate(savedInstanceState);  
23.         setContentView(R.layout.http);  
24.         TextView mTextView = (TextView) this.findViewById(R.id.TextView_HTTP);  
25.         // http地址  
26.         String httpUrl = "http://192.168.1.110:8080/httpget.jsp?par=HttpClient_android_Get";  
27.         // HttpGet连接对象  
28.         HttpGet httpRequest = new HttpGet(httpUrl);  
29.         try {  
30.             // 取得HttpClient对象  
31.             HttpClient httpclient = new DefaultHttpClient();  
32.             // 请求HttpClient，取得HttpResponse  
33.             HttpResponse httpResponse = httpclient.execute(httpRequest);  
34.             // 请求成功  
35.             if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {  
36.                 // 取得返回的字符串  
37.                 String strResult = EntityUtils.toString(httpResponse  
38.                         .getEntity());  
39.                 mTextView.setText(strResult);  
40.             } else {  
41.                 mTextView.setText("请求错误!");  
42.             }  
43.         } catch (ClientProtocolException e) {  
44.             mTextView.setText(e.getMessage().toString());  
45.         } catch (IOException e) {  
46.             mTextView.setText(e.getMessage().toString());  
47.         } catch (Exception e) {  
48.             mTextView.setText(e.getMessage().toString());  
49.         }  
50.   
51.         // 设置按键事件监听  
52.         Button button_Back = (Button) findViewById(R.id.Button_Back);  
53.         /* 监听button的事件信息 */  
54.         button_Back.setOnClickListener(new Button.OnClickListener() {  
55.             public void onClick(View v) {  
56.                 /* 新建一个Intent对象 */  
57.                 Intent intent = new Intent();  
58.                 /* 指定intent要启动的类 */  
59.                 intent.setClass(Activity02.this, Activity01.class);  
60.                 /* 启动一个新的Activity */  
61.                 startActivity(intent);  
62.                 /* 关闭当前的Activity */  
63.                 Activity02.this.finish();  
64.             }  
65.         });  
66.     }  
67. }  

 

 

2.  POST

 

Java代码  

1. package com.yarin.android.Examples_08_02;  
2.   
3. import java.io.IOException;  
4. import java.util.ArrayList;  
5. import java.util.List;  
6. import org.apache.http.HttpEntity;  
7. import org.apache.http.HttpResponse;  
8. import org.apache.http.HttpStatus;  
9. import org.apache.http.NameValuePair;  
10. import org.apache.http.client.ClientProtocolException;  
11. import org.apache.http.client.HttpClient;  
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.util.EntityUtils;  
17. import android.app.Activity;  
18. import android.content.Intent;  
19. import android.os.Bundle;  
20. import android.view.View;  
21. import android.widget.Button;  
22. import android.widget.TextView;  
23.   
24. public class Activity03 extends Activity {  
25.     /** Called when the activity is first created. */  
26.     @Override  
27.     public void onCreate(Bundle savedInstanceState) {  
28.         super.onCreate(savedInstanceState);  
29.         setContentView(R.layout.http);  
30.         TextView mTextView = (TextView) this.findViewById(R.id.TextView_HTTP);  
31.         // http地址  
32.         String httpUrl = "http://192.168.1.110:8080/httpget.jsp";  
33.         // HttpPost连接对象  
34.         HttpPost httpRequest = new HttpPost(httpUrl);  
35.         // 使用NameValuePair来保存要传递的Post参数  
36.         List<NameValuePair> params = new ArrayList<NameValuePair>();  
37.         // 添加要传递的参数  
38.         params.add(new BasicNameValuePair("par", "HttpClient_android_Post"));  
39.         try {  
40.             // 设置字符集  
41.             HttpEntity httpentity = new UrlEncodedFormEntity(params, "gb2312");  
42.             // 请求httpRequest  
43.             httpRequest.setEntity(httpentity);  
44.             // 取得默认的HttpClient  
45.             HttpClient httpclient = new DefaultHttpClient();  
46.             // 取得HttpResponse  
47.             HttpResponse httpResponse = httpclient.execute(httpRequest);  
48.             // HttpStatus.SC_OK表示连接成功  
49.             if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {  
50.                 // 取得返回的字符串  
51.                 String strResult = EntityUtils.toString(httpResponse.getEntity());  
52.                 mTextView.setText(strResult);  
53.             } else {  
54.                 mTextView.setText("请求错误!");  
55.             }  
56.         } catch (ClientProtocolException e) {  
57.             mTextView.setText(e.getMessage().toString());  
58.         } catch (IOException e) {  
59.             mTextView.setText(e.getMessage().toString());  
60.         } catch (Exception e) {  
61.             mTextView.setText(e.getMessage().toString());  
62.         }  
63.         // 设置按键事件监听  
64.         Button button_Back = (Button) findViewById(R.id.Button_Back);  
65.         /* 监听button的事件信息 */  
66.         button_Back.setOnClickListener(new Button.OnClickListener() {  
67.             public void onClick(View v) {  
68.                 /* 新建一个Intent对象 */  
69.                 Intent intent = new Intent();  
70.                 /* 指定intent要启动的类 */  
71.                 intent.setClass(Activity03.this, Activity01.class);  
72.                 /* 启动一个新的Activity */  
73.                 startActivity(intent);  
74.                 /* 关闭当前的Activity */  
75.                 Activity03.this.finish();  
76.             }  
77.         });  
78.     }  
79. }  

 

Apache org.apache.http.client.HttpClient;