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。-In the wifi LAN, the phone can communicate with the computer through the socket. Mobile phone to do the service side, the computer to do the client can also, in turn, the computer to do