一、java socket编程的介绍http://www.cnblogs.com/linzheng/archive/2011/01/23/1942328.html

二、URL、UrlConnection网络编程介绍

三、HTTP网络编程介绍

http协议-简介 http协议-C#获取网页源代码 http协议-多线程文件传输

四、 Web Service网络编程介绍

五、 android WebView网络编程介绍

实例代码-----------------------------------------------

 

 

 

服务器端模拟

MyServer.java

 

1. package com.amaker.socket;  
2.  
3. import java.io.IOException;  
4. import java.io.OutputStream;  
5. import java.net.ServerSocket;  
6. import java.net.Socket;  
7. /**  
8.  *   
9.  * Socket 服务器，向客户端写Hello Android!  
10.  */  
11. public class MyServer {  
12.     public static void main(String[] args) {  
13.         try {  
14.             ServerSocket server = new ServerSocket(8888);  
15.             while(true){  
16.                 Socket client = server.accept();  
17.                 OutputStream out = client.getOutputStream();  
18.                 String msg = "Hello Android!";  
19.                 out.write(msg.getBytes());  
20.                 client.close();  
21.             }  
22.         } catch (IOException e) {  
23.             e.printStackTrace();  
24.         }  
25.     }  
26. } 

LoginServlet.java

 

1. package com.amaker.http;  
2.  
3. import java.io.IOException;  
4. import java.io.PrintWriter;  
5.  
6. import javax.servlet.ServletException;  
7. import javax.servlet.http.HttpServlet;  
8. import javax.servlet.http.HttpServletRequest;  
9. import javax.servlet.http.HttpServletResponse;  
10.  
11. /**  
12.  *   
13.  * 响应登录Servlet  
14.  */  
15. public class LoginServlet extends HttpServlet {  
16.  
17.     public void doGet(HttpServletRequest request, HttpServletResponse response)  
18.             throws ServletException, IOException {  
19.           
20.         String username = request.getParameter("username");  
21.         String password = request.getParameter("password");  
22.         System.out.println(username+":"+password);  
23.         response.setContentType("text/html");  
24.         response.setCharacterEncoding("utf-8");  
25.         PrintWriter out = response.getWriter();  
26.         String msg = null;  
27.         if(username!=null&&username.equals("admin")&&password!=null&&password.equals("1")){  
28.             msg = "登录成功!";  
29.         }else{  
30.             msg = "登录失败!";  
31.         }  
32.         out.print(msg);  
33.         out.flush();  
34.         out.close();  
35.     }  
36.  
37.     public void doPost(HttpServletRequest request, HttpServletResponse response)  
38.             throws ServletException, IOException {  
39.         doGet(request,response);  
40.     }  
41.  
42. } 

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
xmlns="http://java.sun.com/xml/ns/j2ee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">


<servlet>
<servlet-name>LoginServlet</servlet-name>
<servlet-class>com.amaker.http.LoginServlet</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/servlet/LoginServlet</url-pattern>
</servlet-mapping>

</web-app>

android客户端

MainActivity.java

 

1. package com.amaker.ch13;  
2.  
3. import android.app.ListActivity;  
4. import android.content.Intent;  
5. import android.os.Bundle;  
6. import android.view.View;  
7. import android.widget.ArrayAdapter;  
8. import android.widget.ListView;  
9.  
10. import com.amaker.ch13.http.LoginActivity;  
11. import com.amaker.ch13.socket.TestSocketActivity;  
12. import com.amaker.ch13.url.TestURLActivity;  
13. import com.amaker.ch13.webservice.TestWebServiceActivity;  
14. import com.amaker.ch13.webservice.WeatherActivity;  
15. import com.amaker.ch13.webview.TestWebViewActivity;  
16.  
17. public class MainActivity extends ListActivity {  
18.     @Override  
19.     public void onCreate(Bundle savedInstanceState) {  
20.         super.onCreate(savedInstanceState);  
21.         // 菜单项数组  
22.         String[] items = {"测试 Socket","测试URL、UrlConnection","测试 HTTP","测试 Web Service","天气预报","Test WebView"};  
23.         // 将菜单项数组设置为ListView的列表项展示  
24.         setListAdapter(new ArrayAdapter<String>(this,  
25.                 android.R.layout.simple_list_item_1, items));  
26.         getListView().setTextFilterEnabled(true);  
27.     }  
28.       
29.     // 响应菜单项的单击事件  
30.     protected void onListItemClick(ListView l, View v, int position, long id) {  
31.         Intent intent = null;  
32.         switch (position) {  
33.         case 0:  
34.             intent = new Intent(MainActivity.this,TestSocketActivity.class);  
35.             startActivity(intent);  
36.             break;  
37.         case 1:  
38.             intent = new Intent(MainActivity.this,TestURLActivity.class);  
39.             startActivity(intent);  
40.             break;  
41.         case 2:  
42.             intent = new Intent(MainActivity.this,LoginActivity.class);  
43.             startActivity(intent);  
44.             break;  
45.         case 3:  
46.             intent = new Intent(MainActivity.this,TestWebServiceActivity.class);  
47.             startActivity(intent);  
48.             break;  
49.         case 4:  
50.             intent = new Intent(MainActivity.this,WeatherActivity.class);  
51.             startActivity(intent);  
52.             break;  
53.         case 5:  
54.             intent = new Intent(MainActivity.this,TestWebViewActivity.class);  
55.             startActivity(intent);  
56.             break;  
57.         }  
58.     }  
59. } 

AndroidManifest.xml

 

1. <?xml version="1.0" encoding="utf-8"?> 
2. <manifest xmlns:android="http://schemas.android.com/apk/res/android" 
3.       package="com.amaker.ch13" 
4.       android:versionCode="1" 
5.       android:versionName="1.0"> 
6.     <application android:icon="@drawable/icon" android:label="@string/app_name"> 
7.         <activity android:name=".MainActivity" 
8.                   android:label="@string/app_name"> 
9.             <intent-filter> 
10.                 <action android:name="android.intent.action.MAIN" /> 
11.                 <category android:name="android.intent.category.LAUNCHER" /> 
12.             </intent-filter> 
13.         </activity> 
14.           
15.         <activity android:name="com.amaker.ch13.http.LoginActivity"/> 
16.           
17.         <activity android:name="com.amaker.ch13.socket.TestSocketActivity"/> 
18.           
19.         <activity android:name="com.amaker.ch13.url.TestURLActivity"/> 
20.           
21.         <activity android:name="com.amaker.ch13.webservice.TestWebServiceActivity"/> 
22.           
23.         <activity android:name="com.amaker.ch13.webservice.WeatherActivity"/> 
24.           
25.         <activity android:name="com.amaker.ch13.webview.TestWebViewActivity"/> 
26.  
27.     </application> 
28.     <uses-sdk android:minSdkVersion="3" /> 
29.  
30. <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission> 
31. <uses-permission android:name="android.permission.INTERNET"></uses-permission> 
32. </manifest> 

一、socket编程

TestSocketActivity.java

 

1. 代码  
2.  
3. package com.amaker.ch13.socket;  
4.  
5. import java.io.IOException;  
6. import java.io.InputStream;  
7. import java.net.Socket;  
8. import java.net.UnknownHostException;  
9.  
10. import android.app.Activity;  
11. import android.os.Bundle;  
12. import android.widget.TextView;  
13. import com.amaker.ch13.R;  
14. /**  
15.  *   
16.  * Android　Socket 客户端接收服务器信息  
17.  */  
18. public class TestSocketActivity extends Activity {  
19.     private TextView myTextView;  
20.     @Override  
21.     public void onCreate(Bundle savedInstanceState) {  
22.         super.onCreate(savedInstanceState);  
23.         setContentView(R.layout.socket);  
24.         myTextView = (TextView)findViewById(R.id.msgTextView01);  
25.         try {  
26.             Socket socket = new Socket("192.168.1.101",8888);  
27.             InputStream in = socket.getInputStream();  
28.             byte[] buffer = new byte[in.available()];  
29.             in.read(buffer);  
30.             String msg = new String(buffer);  
31.             myTextView.setText(msg);  
32.         } catch (UnknownHostException e) {  
33.             e.printStackTrace();  
34.         } catch (IOException e) {  
35.             e.printStackTrace();  
36.         }  
37.     }  
38. } 

socket.xml

 

1. 代码  
2.  
3. <?xml version="1.0" encoding="utf-8"?> 
4. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
5.     android:orientation="vertical" 
6.     android:layout_width="fill_parent" 
7.     android:layout_height="fill_parent" 
8.     > 
9.       
10.     <TextView   
11.     android:text="等待接收服务器信息..."   
12.     android:id="@+id/msgTextView01"   
13.     android:layout_width="wrap_content"   
14.     android:layout_height="wrap_content"></TextView> 
15.       
16. </LinearLayout> 

二、URL、UrlConnection编程

TestURLActivity.java

 

1. 代码  
2.  
3. package com.amaker.ch13.url;  
4.  
5. import java.io.InputStream;  
6. import java.net.URL;  
7. import java.net.URLConnection;  
8.  
9. import android.app.Activity;  
10. import android.graphics.Bitmap;  
11. import android.graphics.BitmapFactory;  
12. import android.os.Bundle;  
13. import android.widget.ImageView;  
14.  
15. import com.amaker.ch13.R;  
16. /**  
17.  * 通过URL进行网络连接  
18.  */  
19. public class TestURLActivity extends Activity {  
20.     private ImageView imageView;  
21.     @Override  
22.     public void onCreate(Bundle savedInstanceState) {  
23.         super.onCreate(savedInstanceState);  
24.         setContentView(R.layout.test_url);  
25.         imageView = (ImageView)findViewById(R.id.ImageView01);  
26.           
27.         String urlStr = "http://192.168.1.101:8080/Chapter_13_Networking_server/upload/zs.jpg";  
28.           
29.         try {  
30.             URL url = new URL(urlStr);  
31.             // 1. 直接使用URL获得输入流  
32.             //InputStream in = url.openStream();  
33.               
34.             // 2. 获得URLconnection  
35.             URLConnection conn = url.openConnection();  
36.             InputStream in = conn.getInputStream();  
37.               
38.             // 3. 如果是HTTP协议可以使用HttpURLConnection  
39.             //HttpURLConnection httpConn = (HttpsURLConnection)conn;  
40.             //in = httpConn.getInputStream();  
41.               
42.             Bitmap bm = BitmapFactory.decodeStream(in);  
43.               
44.             imageView.setImageBitmap(bm);  
45.               
46.         } catch (Exception e) {  
47.             e.printStackTrace();  
48.         }  
49.     }  
50. } 

test_url.xml

 

1. 代码  
2.  
3. <?xml version="1.0" encoding="utf-8"?> 
4. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
5.     android:orientation="vertical" 
6.     android:layout_width="fill_parent" 
7.     android:layout_height="fill_parent" 
8.     > 
9.  
10.     <ImageView   
11.         android:id="@+id/ImageView01"   
12.         android:layout_width="wrap_content"   
13.         android:layout_height="wrap_content"></ImageView> 
14.  
15. </LinearLayout> 

三、 HTTP编程

LoginActivity.java

 

1. 代码  
2.  
3. package com.amaker.ch13.http;  
4.  
5. import java.io.UnsupportedEncodingException;  
6. import java.util.ArrayList;  
7. import java.util.List;  
8.  
9. import org.apache.http.HttpResponse;  
10. import org.apache.http.NameValuePair;  
11. import org.apache.http.client.entity.UrlEncodedFormEntity;  
12. import org.apache.http.client.methods.HttpPost;  
13. import org.apache.http.impl.client.DefaultHttpClient;  
14. import org.apache.http.message.BasicNameValuePair;  
15. import org.apache.http.protocol.HTTP;  
16. import org.apache.http.util.EntityUtils;  
17.  
18. import android.app.Activity;  
19. import android.app.AlertDialog;  
20. import android.content.DialogInterface;  
21. import android.os.Bundle;  
22. import android.view.View;  
23. import android.view.View.OnClickListener;  
24. import android.widget.Button;  
25. import android.widget.EditText;  
26.  
27. import com.amaker.ch13.R;  
28. public class LoginActivity extends Activity {  
29.     /*  
30.      * 声明使用到的Button和EditText视图组件  
31.      */  
32.     private Button cancelBtn,loginBtn;  
33.     private EditText userEditText,pwdEditText;  
34.       
35.     @Override  
36.     public void onCreate(Bundle savedInstanceState) {  
37.         super.onCreate(savedInstanceState);  
38.         setContentView(R.layout.http1);  
39.         /*  
40.          * 实例化视图组件  
41.          */  
42.         cancelBtn = (Button)findViewById(R.id.cancelButton);  
43.         loginBtn = (Button)findViewById(R.id.loginButton);  
44.           
45.         userEditText = (EditText)findViewById(R.id.userEditText);  
46.         pwdEditText = (EditText)findViewById(R.id.pwdEditText);  
47.           
48.         /*  
49.          * 设置登录监听器  
50.          */  
51.         loginBtn.setOnClickListener(new OnClickListener() {  
52.             @Override  
53.             public void onClick(View v) {  
54.                     String username = userEditText.getText().toString();  
55.                     String pwd = pwdEditText.getText().toString();  
56.                     login(username,pwd);  
57.             }  
58.         });  
59.           
60.         /*  
61.          * 设置取消监听器  
62.          */  
63.         cancelBtn.setOnClickListener(new OnClickListener() {  
64.             @Override  
65.             public void onClick(View v) {  
66.                 finish();  
67.             }  
68.         });  
69.           
70.  
71.     }  
72.       
73.     /*  
74.      * 定义一个显示提示信息的对话框  
75.      */  
76.     private void showDialog(String msg){  
77.         AlertDialog.Builder builder = new AlertDialog.Builder(this);  
78.         builder.setMessage(msg)  
79.                .setCancelable(false)  
80.                .setPositiveButton("确定", new DialogInterface.OnClickListener() {  
81.                    public void onClick(DialogInterface dialog, int id) {  
82.                    }  
83.                });  
84.         AlertDialog alert = builder.create();  
85.         alert.show();  
86.     }  
87.     /*  
88.      * 通过用户名称和密码进行查询，发送Post请求，获得响应结果。  
89.      */  
90.     private void login(String username,String password){  
91.         // 1. 使用 HttpURLConnection 实现  
92.         /*String urlStr = "http://192.168.1.101:8080/Chapter_13_Networking_server/servlet/LoginServlet?";  
93.         String queryString = "username="+username+"&password="+password;  
94.         urlStr+=queryString;  
95.         try {  
96.             URL url = new URL(urlStr);  
97.             HttpURLConnection conn = (HttpURLConnection)url.openConnection();  
98.                   
99.             if(conn.getResponseCode()==HttpURLConnection.HTTP_OK){  
100.                 InputStream in = conn.getInputStream();  
101.                 byte[] b = new byte[in.available()];  
102.                 in.read(b);  
103.                 String msg = new String(b);  
104.                 showDialog(msg);  
105.                 in.close();  
106.             }  
107.             conn.disconnect();  
108.         } catch (Exception e) {  
109.             showDialog(e.getMessage());  
110.         }*/  
111.         // 2. 使用 Apache HTTP 客户端实现  
112.         String urlStr = "http://192.168.1.101:8080/Chapter_13_Networking_server/servlet/LoginServlet";  
113.         HttpPost request = new HttpPost(urlStr);  
114.         // 如果传递参数个数比较多的话，我们可以对传递的参数进行封装  
115.         List<NameValuePair> params = new ArrayList<NameValuePair>();  
116.         params.add(new BasicNameValuePair("username", username));  
117.         params.add(new BasicNameValuePair("password", password));  
118.         try {  
119.             request.setEntity( new UrlEncodedFormEntity(params,HTTP.UTF_8));  
120.             HttpResponse response = new DefaultHttpClient().execute(request);  
121.             if(response.getStatusLine().getStatusCode()==200){  
122.                 String msg = EntityUtils.toString(response.getEntity());  
123.                 showDialog(msg);  
124.             }  
125.         } catch (Exception e) {  
126.             e.printStackTrace();  
127.         }  
128.     }  
129. } 

 

本文转自linzheng 51CTO博客，原文链接:http://blog.51cto.com/linzheng/1079279