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：

package com.example.chess;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketAddress;
import java.util.Arrays;


public class udpmanager implements Runnable {
private DatagramSocket sock;
private boolean isrun=true;
netListenter listenter;
public udpmanager(int port) throws Exception{
    sock=new DatagramSocket(port);
    new Thread(this).start();
}
    public void send(final String text, final String ip, final int port)
            throws Exception {
        new Thread() {
            public void run() {
                try {
                    byte[] data = text.getBytes();
                    DatagramPacket p = new DatagramPacket(data, data.length,
                            InetAddress.getByName(ip), port);
                    sock.send(p);
                } catch (IOException e) {
                }
            }
        }.start();
    }
@Override
public void run() {
    try {
    while(isrun){
        DatagramPacket p = new DatagramPacket(new byte[100], 100);
            sock.receive(p);
            byte[] data=Arrays.copyOf(p.getData(), p.getLength());
        if(listenter!=null)listenter.getmag(new String(data), p.getAddress(), p.getPort());
    }
    } catch (IOException e) {
    }
}
public void close(){
    isrun=false;
    sock.close();
}
interface netListenter{
public    void getmag(String str,InetAddress addr,int port);
    }
}