Android Apps Analysis 02-android im: an open-source implementation of instant messaging similar to mobile QQ

Android Apps Analysis 02-android im: an open-source implementation of instant messaging similar to mobile QQ

This is a simple IM application running on Android when the application issues HTTP requests to the server, in PHP and MySQL, to verify, register and get other friends ' status and data to implement, then it communicates with other devices through the socket interface.

1. Database as long as 2 tables: Friends table and User table:

CREATE TABLE ' friends ' (' Id ' int (ten) unsigned NOT null auto_increment, ' providerid ' int (ten) unsigned NOT NULL default  ' 0 ', ' requestid ' int (ten) unsigned NOT null default ' 0 ', ' status ' binary (1) is not null default ' 0 ', PRIMARY KEY (' Id '), UNIQUE key ' Index_3 ' (' ProviderID ', ' RequestID '), key ' Index_2 ' (' ProviderID ', ' RequestID ', ' status ')) Engine=innodb DEFAULT charset=latin1 comment= ' ProviderID is the Id of the users who wish to be friend with '; CREATE TABLE ' users ' (' Id ' int () unsigned not NULL auto_increment, ' username ' varchar "NOT null default ' ', ' pas Sword ' varchar (+) NOT null default ', ' email ' varchar (") NOT null default ' ', ' date ' datetime NOT NULL default ' 0000- 00-00 00:00:00 ', ' Status ' tinyint (3) unsigned NOT NULL default ' 0 ', ' authenticationtime ' datetime NOT NULL default ' 0000 -00-00 00:00:00 ', ' userkey ' varchar (+) NOT null default ' ', ' IP ' varchar ($) NOT null default ' ', ' Port ' int (Ten) Unsig Ned not NULL default ' 0 ', PRIMARY key (' Id '), UNIQUE key ' Index_2 ' (' username '), KEY ' index_3 ' (' Authenticationtime ')) Engine=innodb DEFAULT Charset=utf8; 

2. The core code is to send HTTP request and socket:

 public string Sendhttprequest (string params) {URL url;                 string result = new String ();                         try {url = new URL (authentication_server_address);                         HttpURLConnection connection;                         Connection = (httpurlconnection) url.openconnection ();                                                  Connection.setdooutput (TRUE);                                                  PrintWriter out = new PrintWriter (Connection.getoutputstream ());                         OUT.PRINTLN (params);                          Out.close ();                                                         BufferedReader in = new BufferedReader (New InputStreamReader (                         Connection.getinputstream ()));                          String Inputline;              while ((Inputline = In.readline ()) = null) {                   result = Result.concat (inputline);                                      } in.close ();                 } catch (Malformedurlexception e) {e.printstacktrace ();                 } catch (IOException e) {e.printstacktrace (); } if (result.length () = = 0) {result = HTT                 p_request_failed;                                   } return result;                                                                           } public boolean SendMessage (String message, string IP, int port) {try {                                                  string[] str = ip.split ("\ \");                                                  byte[] IP = new Byte[str.length]; for (int i= 0; i < str.length;                                                         i++) {Ip[i] = (byte) integer.parseint (Str[i]); } Socket socket = Getsocket (inetaddress.getbyaddre                         SS (IP), port);                         if (socket = = NULL) {return false;                         } printwriter out = null;                                                  out = new PrintWriter (Socket.getoutputstream (), true);                 OUT.PRINTLN (message);                         } catch (Unknownhostexception e) {return false;                 E.printstacktrace ();                                            } catch (IOException e) {return false;                 E.printstacktrace ();                  } return true;   } 

3. Other information:

Android Instant messaging app using HTTP request and socket
Original source:https://code.google.com/p/simple-android-instant-messaging-application/
Latest Source:Https://github.com/Pirngruber/AndroidIM
Source Download: http://download.csdn.net/user/yangzhenping
source download provided by the initial author: http://download.csdn.net/detail/yangzhenping/8397989

Android Apps Analysis 02-android im: an open-source implementation of instant messaging similar to mobile QQ