Simple chat program based on Android network programming

The previous article on the Android Network Programming Foundation, today wrote a simple chat program to share

The first is the service-side code:

1  PackageCom.jiao.socketdemo;2 3 ImportJava.io.BufferedReader;4 ImportJava.io.BufferedWriter;5 Importjava.io.IOException;6 ImportJava.io.InputStreamReader;7 ImportJava.io.OutputStreamWriter;8 ImportJava.net.ServerSocket;9 ImportJava.net.Socket;Ten  One  Public classChatserverextendsThread { A     PrivateServerSocket Server =NULL; -     Private Static Final intPORT = 5550; -     Privatebufferedwriter writer; the     PrivateBufferedReader Reader; -  -      PublicChatserver ()throwsIOException { -  +Createsocket ();//Initialize Socket -     } +  A @Override at      Public voidrun () { -  - Socket client; - String txt; -  -         Try { in              while(true) { -                 //Get reply message toClient =Responsesocket (); +                  while(true) { -                     //Accept Client Information theTXT =receivemsg (client); *  $SYSTEM.OUT.PRINTLN ("Message sent by client:" +txt);Panax Notoginseng  - sendmsg (client, txt); the  +                     if(true) A                          Break; the                 } + closesocket (client); -             } $}Catch(Exception e) { $             //Todo:handle Exception -         } -  the     } - Wuyi     //Close Connection the     Private voidClosesocket (Socket client)throwsIOException { - reader.close (); Wu writer.close (); - client.close (); About  $     } -  -     //encapsulate methods for sending messages -     Private voidSENDMSG (socket socket, String MSG)throwsIOException { Awriter =NewBufferedWriter (NewOutputStreamWriter (Socket.getoutputstream ())); +Writer.write (MSG + "\ n")); the Writer.flush (); -     } $  the     //encapsulating methods for receiving messages the     PrivateString receivemsg (Socket socket)throwsIOException { theReader =NewBufferedReader (NewInputStreamReader (Socket.getinputstream ())); theString txt =reader.readline (); -         returntxt; in     } the  the     //Accept Message About     PrivateSocket Responsesocket ()throwsIOException { theSocket client =server.accept (); the         returnclient; the     } +  -     //Initialize Socket the     Private voidCreatesocket ()throwsIOException {BayiServer =NewServerSocket (PORT, 100); the     } the  -}

The code to start the server is as follows:

1 // Create a chat server 2         New chatserver (); 3         // detects if the server is started and if not, starts the server 4         if NULL ) {5            chatserver.start (); 6         }

The following is the code for the client:

1  Packagecom.example.socketclient;2 3 ImportJava.io.BufferedReader;4 ImportJava.io.BufferedWriter;5 Importjava.io.IOException;6 ImportJava.io.InputStreamReader;7 ImportJava.io.OutputStreamWriter;8 ImportJava.net.Socket;9 Importjava.net.UnknownHostException;Ten Importandroid.app.Activity; One ImportAndroid.os.Bundle; A  -  Public classMainactivityextendsActivity { -      Public Static intServer_port = 5550; the  - @Override -     protected voidonCreate (Bundle savedinstancestate) { -         Super. OnCreate (savedinstancestate); + Setcontentview (r.layout.activity_main); -  +         NewThread () { A              Public voidrun () { at message (); -             } - }.start (); -     } -  -     Private voidmessage () { in         Try { -Socket client = Requestsocket ("This is the IP of the server", server_port); tosendmsg (client, "Client send"); +String txt =receivemsg (client); -SYSTEM.OUT.PRINTLN ("Server-side return data:" +txt); the}Catch(Exception e) { *  $         }Panax Notoginseng     }; -  the     //client Get Message Class +     PrivateSocket Requestsocket (String host,intPortthrowsunknownhostexception, IOException { ASocket socket =NewSocket (host, port); the         returnsocket; +     } -  $     //client sends message class $     Private voidSENDMSG (socket socket, String msg)throwsIOException { -         //The message to be sent is written to buffer -BufferedWriter writer =NewBufferedWriter (NewOutputStreamWriter (Socket.getoutputstream ())); the         //Format Conversion -Writer.write ("\ n", "") + "\ n" (msg.replace));Wuyi         //Refresh, send the Writer.flush (); -     } Wu  -     //Client Receives message About     PrivateString receivemsg (Socket socket)throwsIOException { $         //write in read buffer//gets the received message into the data flow -BufferedReader reader =NewBufferedReader (NewInputStreamReader (Socket.getinputstream ())); -         //reading a message into a string -String MSG =reader.readline (); A         //returns a message as a string +         returnMSG; the     } -  $}

Simple chat program based on Android network programming