(Android communicates with the socket of the computer on the mobile phone under wifi. The source code of VC program on the computer side is included. It can be run only after the EXE file is compiled and generated in the VC6 environment. The technical document of the implementation process of this example is also included. Under the wifi network, mobile phones and computers can communicate through sockets. The mobile phone is the server and the computer is the client, which can also be exchanged. The mobile phone serves as the server and the computer uses MFC programming as the client. The principle is that the mobile phone establishes a ServerSocket and obtains its own IP address and port; Then the computer connects to the IP: port of the phone through the socket.)