Android IDP服务器/客户端

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UDP服务器

public class UdpServer implements Runnable {
    private static UdpServer utils = null;

    private String ip = null;
    public int port = 8880;
    private DatagramPacket dpRcv = null,dpSend = null;
    private static DatagramSocket ds = null;
    private byte[] msgRcv = new byte[1024];
    private boolean isExit = false;     //udp生命线程

    private InetAddress cilentAddress;
    private int clientPort;

    private JSONObject serverJson;

    public synchronized static UdpServer getIntance(){
        if (utils == null){
            utils = new UdpServer();
        }
        return utils;
    }
    //设置超时
    private void setSoTime(int ms) throws SocketException {
        if (ds != null){
            ds.setSoTimeout(ms);
        }
    }

    //更改UDP生命线程因子
    public void exit(){
        isExit = true;
        if (ds != null){
            if (!ds.isClosed()){
                ds.close();
            }
            ds.disconnect();
            ds = null;
        }
    }

    /****
     * 发送
     * @param sendStr
     */
    public void Send(String sendStr) {
        try {
            if (ds != null && dpSend != null){
                dpSend = new DatagramPacket(sendStr.getBytes(),sendStr.getBytes().length,cilentAddress,clientPort);
                ds.send(dpSend);
            }
        }catch (Exception e){
            e.printStackTrace();
        }
    }

    @Override
    public void run() {
        ip = FTPServerUtils.getIntance().getLocalIpAddress();
        try {
            InetSocketAddress inetSocketAddress = new InetSocketAddress(ip, port);
            if (ds != null && !ds.isConnected()){
                LogUtils.printLog("UDP服务器", "断开重连");
            }else {
                LogUtils.printLog("UDP服务器", "开始连接");
                ds = new DatagramSocket(inetSocketAddress);
            }
            LogUtils.printLog("SocketInfo", "UDP服务器已经启动");
//            设置超时,不需要可以删除
//            setSoTime(3000);
            dpRcv = new DatagramPacket(msgRcv, msgRcv.length);
            while (!isExit) {
                if (ds != null && !ds.isClosed()){
                    ds.receive(dpRcv);
                    cilentAddress = dpRcv.getAddress();
                    clientPort = dpRcv.getPort();
                    String string = new String(dpRcv.getData(), dpRcv.getOffset(), dpRcv.getLength());
                    receiveData(string);
                }
            }
            if (ds != null){
                if (!ds.isClosed()){
                    ds.close();
                }
                ds.disconnect();
                ds = null;
            }
            LogUtils.printLog("UDP监听关闭");
        } catch (Exception e) {
            e.printStackTrace();
            LogUtils.printLog("UDP服务器已经启动--Exception---" + e.getMessage());
        }
    }

    private JSONObject jsonObject = null;
    /****解析接收数据****/
    public void receiveData(String data){
        try {
            LogUtils.printLog("-----接收数据----" + data);
            serverJson = new JSONObject(data);
        }catch (Exception e){
            e.printStackTrace();
            LogUtils.printLog("解析接收数据--Exception---" + e.getMessage());
        }
    }

    /***应答****/
    public void sendReq(String type){
        try {
            JSONObject json = new JSONObject();
            json.put("type ", "respond");
            json.put("req", type);
            Send(json.toString());
            LogUtils.printLog("----发送应答----" + json.toString());
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}

UDP客户端

public class UDPClient implements Runnable{
    final static int udpPort = 8880;
    final static String hostIp = "192.168.5.21";
    private static DatagramSocket socket = null;
    private static DatagramPacket packetSend,packetRcv;
    private boolean exit= true; //udp生命线程
    private byte[] msgRcv = new byte[1024]; //接收消息

    public UDPClient(){
        super();
    }

    //是否关闭
    public boolean isExit(){
        if (exit){
            return true;
        }
        return false;
    }

    //更改UDP生命线程因子
    public void setExit(boolean b){
        exit= b;
    }

    //发送消息
    public String send(String msgSend){
        InetAddress hostAddress = null;

        try {
            hostAddress = InetAddress.getByName(hostIp);
        } catch (UnknownHostException e) {
            PrintlnLog.printLog("udpClient","未找到服务器");
            e.printStackTrace();
        }
        packetSend = new DatagramPacket(msgSend.getBytes() , msgSend.getBytes().length,hostAddress,udpPort);

        try {
            socket.send(packetSend);
        } catch (IOException e) {
            e.printStackTrace();
            PrintlnLog.printLog("udpClient","发送失败");
        }
        //   socket.close();
        return msgSend;
    }

    @Override
    public void run() {

        try {
            socket = new DatagramSocket();
//            socket.setSoTimeout(3000);//设置超时为3s
        } catch (SocketException e) {
            PrintlnLog.printLog("udpClient","建立接收数据报失败");
            e.printStackTrace();
        }
        packetRcv = new DatagramPacket(msgRcv,msgRcv.length);
        while (exit){
            try {
                PrintlnLog.printLog("udpClient", "UDP监听");
                socket.receive(packetRcv);
                String RcvMsg = new String(packetRcv.getData(),packetRcv.getOffset(),packetRcv.getLength());
                receiveData(RcvMsg);
                PrintlnLog.printLog("Rcv",RcvMsg);
            }catch (IOException e){
                e.printStackTrace();
            }
        }

        PrintlnLog.printLog("udpClient","UDP监听关闭");
        socket.close();
    }

    /****解析数据****/
    public void receiveData(String data){
        try {
            PrintlnLog.printLog("-----收到数据-----" + data);
        }catch (Exception e){
            e.printStackTrace();
        }
    }

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转载自blog.csdn.net/weixin_40391500/article/details/82350431
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