android udpmanager

android 网络编程中，两客户端之间进行通讯时不通过服务器，也就是p2p的方式，下面给大家整理了一个通讯中常用的udpmanager工具类。

代码如下：

 1 package com.example.chess;
 2 import java.io.IOException;
 3 import java.net.DatagramPacket;
 4 import java.net.DatagramSocket;
 5 import java.net.InetAddress;
 6 import java.net.SocketAddress;
 7 import java.util.Arrays;
 8 
 9 
10 public class udpmanager implements Runnable {
11 private DatagramSocket sock;
12 private boolean isrun=true;
13 netListenter listenter;
14 public udpmanager(int port) throws Exception{
15     sock=new DatagramSocket(port);
16     new Thread(this).start();
17 }
18     public void send(final String text, final String ip, final int port)
19             throws Exception {
20         new Thread() {
21             public void run() {
22                 try {
23                     byte[] data = text.getBytes();
24                     DatagramPacket p = new DatagramPacket(data, data.length,
25                             InetAddress.getByName(ip), port);
26                     sock.send(p);
27                 } catch (IOException e) {
28                 }
29             }
30         }.start();
31     }
32 @Override
33 public void run() {
34     try {
35     while(isrun){
36         DatagramPacket p = new DatagramPacket(new byte[100], 100);
37             sock.receive(p);
38             byte[] data=Arrays.copyOf(p.getData(), p.getLength());
39         if(listenter!=null)listenter.getmag(new String(data), p.getAddress(), p.getPort());
40     }
41     } catch (IOException e) {
42     }
43 }
44 public void close(){
45     isrun=false;
46     sock.close();
47 }
48 interface netListenter{
49 public    void getmag(String str,InetAddress addr,int port);
50     }
51 }