Android 开发:Socket编程之udp发送

Android 开发:Socket编程之udp发送

需要实现的功能：采用udp下的socket编程，当按下确认键，模拟器发送文本框数据，pc机上的网络调试助手接收

环境：Windows 7 + Eclipse + SDK

代码：

1. package test.soket;  
2.   
3. //import com.test_button.R;   
4.   
5. import java.io.DataOutputStream;  
6. import java.io.IOException;  
7. import java.net.DatagramPacket;  
8. import java.net.DatagramSocket;  
9. import java.net.InetAddress;  
10. import java.net.Socket;  
11. import java.net.SocketException;  
12. import java.net.UnknownHostException;  
13.   
14. import Android.app.Activity;  
15. import android.os.Bundle;  
16. import android.view.View;  
17. import android.widget.Button;  
18. import android.widget.TextView;  
19.   
20. public class test_socket extends Activity {  
21.     public static TextView show;  
22.     public static Button press;  
23.     public static boolean flag;  
24.       
25.     private static final int MAX_DATA_PACKET_LENGTH = 40;  
26.     private byte[] buffer = new byte[MAX_DATA_PACKET_LENGTH];  
27.     private DatagramPacket dataPacket;  
28.     private DatagramSocket udpSocket;  
29.       
30.     /** Called when the activity is first created. */  
31.     @Override  
32.     public void onCreate(Bundle savedInstanceState) {  
33.         super.onCreate(savedInstanceState);  
34.         setContentView(R.layout.main);  
35.           
36.         //开辟控件空间   
37.         show = (TextView)findViewById(R.id.editText1);  
38.         press = (Button)findViewById(R.id.button1);  
39.         flag = false;  
40.         //soket_send thread = new soket_send();   
41.         //thread.init();   
42.         //thread.start();   
43.           
44.         try  
45.         {  
46.             udpSocket = new DatagramSocket(5554);  
47.         }  
48.         catch (SocketException e)  
49.         {  
50.             // TODO Auto-generated catch block   
51.             e.printStackTrace();  
52.         }  
53.         dataPacket = new DatagramPacket(buffer, MAX_DATA_PACKET_LENGTH);  
54.         String str = "hello,jdh";  //这是要传输的数据   
55.         byte out [] = str.getBytes();  //把传输内容分解成字节   
56.         dataPacket.setData(out);  
57.         dataPacket.setLength(out.length);  
58.         dataPacket.setPort(5554);  
59.         try  
60.         {  
61.                   
62.             InetAddress broadcastAddr = InetAddress.getByName("192.168.0.248");  
63.             dataPacket.setAddress(broadcastAddr);  
64.             udpSocket.send(dataPacket);  
65.         }  
66.         catch (IOException e)  
67.         {  
68.             // TODO Auto-generated catch block   
69.             e.printStackTrace();  
70.         }  
71.           
72.              
73.         press.setOnClickListener(new Button.OnClickListener()  
74.         {  
75.             @Override  
76.             public void onClick(View v)  
77.             {  
78.                 flag = true;  
79.                 /* 
80.                 String str = "hello,jdh";  //这是要传输的数据 
81.                 byte out [] = str.getBytes();  //把传输内容分解成字节 
82.                 dataPacket.setData(out); 
83.                 dataPacket.setLength(out.length); 
84.                 */  
85.                   
86.                 //获得输入框文本   
87.                 CharSequence str =test_socket.show.getText();  
88.                 byte out[] = str.toString().getBytes();  
89.                 dataPacket.setData(out);  
90.                 dataPacket.setLength(out.length);  
91.                 try  
92.                 {  
93.                           
94.                     InetAddress broadcastAddr = InetAddress.getByName("192.168.0.248");  
95.                     dataPacket.setAddress(broadcastAddr);  
96.                     udpSocket.send(dataPacket);  
97.                 }  
98.                 catch (IOException e)  
99.                 {  
100.                     // TODO Auto-generated catch block   
101.                     e.printStackTrace();  
102.                 }  
103.             }  
104.         });  
105.     }  
106. }  

界面：

注意：在模拟器IP为本机IP，端口为模拟器名称