在 wifi 局域网下，手机可以和电脑通过 socket 通信。手机做服务端，电脑做客户端；也可 以反过来，电脑做服务端，手机做客户端。 下面介绍的是手机作为服务端，电脑使用 MFC 编程作为客户端，原理是，手机建立一个 ServerSocket，并获取自己的 ip 地址和端口 port；然后电脑通过 socket 连接手机的 ip：port 。 手机建立 socketServer 代码 private ServerSocket serverSocket = null; private Runnable mcreateRunnable = new Runnable() { public void run() { try { serverSocket = new ServerSocket(0);//系统分配端口 getLocalIpAddress();//获得手机的 ip 地址 //方法用于等待客服连接 mSocketServer = serverSocket.accept(); //接受客服端数据 BufferedReader 对象 mBufferedReaderServer = new BufferedReader(new InputStreamReader(mSocketServer.getInputStream())); //给客服端发送数据 mPrintWriterServer = new PrintWriter(mSocketServer.getOutputStream(),true); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }; 手机上获取的 ip 地址代码 public String getLocalIpAddress() { try { for (Enumeration en=NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) { NetworkInterface intf = en.nextElement(); for (Enumeration enumIpAddr=intf.getInetAddresses();enumIpAddr.hasMoreElements();) { InetAddress inetAddress = enumIpAddr.nextElement(); //if (!inetAddress.isLoopbackAddress()) { //if(inetAddress.isSiteLocalAddress()) { String ip = “请连接 IP：“+inetAddress.getHostAddress()+“:“ + serverSocket.getLocalPort()+ ““; } } } } } catch (SocketException ex) { ex.printStackTrace(); } } 电脑上使用的是 MFC 编程， socket 代码如下 DWORD clientThreadID; SOCKET clientSock; char server_address[50] = {0}; char recv_message_client[256] = {0}; struct sockaddr_in server_ip; BOOL clientThreadRun = false; //client BOOL InItClientSock() { //Define Variable WORD wVersionrequested; WSADATA wsaData; wVersionrequested = MAKEWORD(2,0); //Start Sock int err = WSAStartup(wVersionrequested, if (err == -1) { MessageBox(0,“WSAStartup err“, “error“,MB_OK); return FALSE; } return TRUE; } BOOL ConnectSock() { SOCKET clientSockConnect; u_short port; //Ini Sock clientSock = socket(AF_INET,SOCK_STREAM,0); if (ServerSock 2) ) { port = atoi(strPort+1); if(port==0) { MessageBox(0, “IP 端口不对, 参考例子：192.168.12.134:8981“, “提示“, MB_OK); return FALSE; } memset(strPort, 0, sizeof(strPort)); } else { MessageBox(0, “IP 地址不对, 参考例子：192.168.12.134:8981“, “提示 “, MB_OK); return FALSE; } //Connect server_ip.sin_family = AF_INET; server_ip.sin_port = ((port temp.Format(“接收到的信息：%s“,recv_message_client); SetDlgItemText(FindWindow(NULL, WINDOWNHANDLERNAME), IDC_STATIC_IP, temp); analyseCommand(recv_message_client); memset(recv_message_client, 0, sizeof(recv_message_client)); } temp.Format(“接收到的信息：%s“,recv_message_client); } return 0; }

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