Android在wifi下手機與電腦的socket通信

在wifi局域網下，手機可以和電腦通過socket通信。手機做服務端，電腦做客戶端；也可以反過來，電腦做服務端，手機做客戶端。

下面介紹的是手機作為服務端，電腦使用MFC編程作為客戶端，原理是，手機建立一個ServerSocket，並獲取自己的ip地址和端口port；然後電腦通過socket連接手機的ip：port。

核心代碼如下：

免費下載地址在 http://linux.linuxidc.com/

用戶名與密碼都是www.linuxidc.com

具體下載目錄在 /2012年資料/2月/8日/Android在wifi下手機與電腦的socket通信/

手機建立socketServer代碼

1. private ServerSocket serverSocket = null;
2. private Runnable mcreateRunnable = new Runnable()
3. {
4. public void run()
5. {
6. try {
7. serverSocket = new ServerSocket(0);//系統分配端口
8. getLocalIpAddress();//獲得手機的ip地址
9. //方法用於等待客服連接
10. mSocketServer = serverSocket.accept();
11. //接受客服端數據BufferedReader對象
12. mBufferedReaderServer = new BufferedReader(new InputStreamReader(mSocketServer.getInputStream()));
13. //給客服端發送數據
14. mPrintWriterServer = new PrintWriter(mSocketServer.getOutputStream(),true);
16. } catch (IOException e) {
17. // TODO Auto-generated catch block
18. e.printStackTrace();
19. }
20. }
21. };

手機上獲取的ip地址代碼

1. public String getLocalIpAddress()
2. {
3. try {
4. for (Enumeration<NetworkInterface> en=NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();)
5. {
6. NetworkInterface intf = en.nextElement();
7. for (Enumeration<InetAddress> enumIpAddr=intf.getInetAddresses();enumIpAddr.hasMoreElements();)
8. {
9. InetAddress inetAddress = enumIpAddr.nextElement();
10. //if (!inetAddress.isLoopbackAddress())
11. {
12. //if(inetAddress.isSiteLocalAddress())
13. {
14. String ip = "請連接IP："+inetAddress.getHostAddress()+":"
15. + serverSocket.getLocalPort()+ "\n";
16. }
17. }
18. }
19. }
20. }
21. catch (SocketException ex) {
22. ex.printStackTrace(); }
23. }

電腦上使用的是MFC編程，socket代碼如下

1. DWORD clientThreadID;
2. SOCKET clientSock;
3. char server_address[50] = {0};
4. char recv_message_client[256] = {0};
5. struct sockaddr_in server_ip;
6. BOOL clientThreadRun = false;
7. //client
8. BOOL InItClientSock()
9. {
10. //Define Variable
11. WORD wVersionrequested;
12. WSADATA wsaData;
14. wVersionrequested = MAKEWORD(2,0);
16. //Start Sock
17. int err = WSAStartup(wVersionrequested,&wsaData);
18. if (err == -1)
19. {
20. MessageBox(0,"WSAStartup err", "error",MB_OK);
21. return FALSE;
22. }
23. return TRUE;
24. }
25. BOOL ConnectSock()
26. {
27. SOCKET clientSockConnect;
28. u_short port;
30. //Ini Sock
31. clientSock = socket(AF_INET,SOCK_STREAM,0);
32. if (ServerSock < 0)
33. {
34. MessageBox(0,"scoker err",
35. "err",MB_OK);
36. return FALSE;
37. }
39. char *strPort = strstr(server_address, ":");
41. if( (strPort!=NULL) && (strlen(strPort)>2) )
42. {
43. port = atoi(strPort+1);
44. if(port==0)
45. {
46. MessageBox(0, "IP端口不對, 參考例子：192.168.12.134:8981", "提示", MB_OK);
47. return FALSE;
48. }
49. memset(strPort, 0, sizeof(strPort));
50. }
51. else
52. {
53. MessageBox(0, "IP地址不對, 參考例子：192.168.12.134:8981", "提示", MB_OK);
54. return FALSE;
55. }
57. //Connect
58. server_ip.sin_family = AF_INET;
59. server_ip.sin_port = ((port&0xff00)>>8)|((port&0x00ff)<<8);
60. server_ip.sin_addr.S_un.S_addr = inet_addr(server_address);
62. clientSockConnect = connect(clientSock,(struct sockaddr*)&server_ip,sizeof(server_ip));
63. if (clientSockConnect!=0)
64. {
65. CString temp;
66. temp.Format("系統拒絕連接，可能是輸入IP地址或端口不對：\n%s:%d", server_address, server_ip.sin_port);
67. SetDlgItemText( FindWindow(NULL, WINDOWNHANDLERNAME), IDC_STATIC_IP, temp);
68. MessageBox(0, "系統拒絕連接，可能是輸入IP地址或端口不對 ", "提示", MB_OK);
69. return FALSE;
70. }
71. return TRUE;
72. }
74. DWORD WINAPI clientThreadFunc(LPVOID threadNum)
75. {
76. int length;
77. CString temp;
79. if(!InItClientSock())
80. return 0;
81. if(!ConnectSock())
82. return 0;
84. //等待連接的時候，連接可能被取消。
85. if(clientThreadRun)
86. SetDlgItemText(FindWindow(NULL, WINDOWNHANDLERNAME), IDC_STATIC_IP, "已經連接上！");
87. else
88. {
89. SetDlgItemText(FindWindow(NULL, WINDOWNHANDLERNAME), IDC_STATIC_IP, "請啟動服務！");
90. return 0;
91. }
93. //send(NewSock,(char*)&FALG,sizeof(FALG)+1,MSG_OOB);
94. while(clientThreadRun)
95. {
96. if( (length = recv(clientSock,(char*)recv_message_client,sizeof(recv_message_client),0))>0)
97. {
98. //MessageBox(0, recv_message, "接收到的信息", MB_OK);
99. temp.Format("接收到的信息：\n%s",recv_message_client);
100. SetDlgItemText(FindWindow(NULL, WINDOWNHANDLERNAME), IDC_STATIC_IP, temp);
102. analyseCommand(recv_message_client);
103. memset(recv_message_client, 0, sizeof(recv_message_client));
104. }
105. temp.Format("接收到的信息：\n%s",recv_message_client);
106. }
108. return 0;
109. }