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  • 1. P2P (Peer To Peer)
    • Used: when applications need to communicate between devices.
    • Examples:
      • Interactive game of checkers
      • Instant Messaging
    • P2P can be implemented:
      • XMPP
      • GTalkServices
  • 2. XMPP
    • E x tensible M essaging and P resence P rotocol
    • It is an open XML technology for real-time communication.
    • Used in applications such as:
      • Instant Messaging
      • Whiteboarding
      • Shared Editing / Collaboration
      • Content Syndication
  • 3. XMPP in detail
    • The XMPP Standards Foundation (XSF) recognizes the following protocols:
    • -Jabber Client -Jabber Server -Presence and IM Session Establishment -Resource Binding -Server Dialback -Simple Authentication and Security Layer -S/MIME Encryption -Stanza Errors -Stream Errors -Transport Layer Security -XML Streams
  • 4. XMPP in Android
    • Used for P2P communication
    • Used for always-on connection
    • Used to provide a way to send and receive Instant Messages
    • Later on, it was replaced by a Google branded GTalkService
  • 5. GTalkService
    • GTalkService is built on open protocols such as XMPP and JINGLE
    • It is an open Service.
    • With GTalkService, one can build a client, connect his/her service with Google Talk or embed the client in web pages
    • GTalk is an instant messaging service built on the GTalkService API
  • 6. Differences between XMPP and GTalkService
    • All of XMPP naming has been purged in favor of Gtalk.
    • IGTalkService now has group chat support
    • GTalkService APIs for message sending have been changed
    • New Services for controlling message/roster/presence notification
  • 7. GTalkService API new features
    • Group Chat
    • File Transfer
    • Offline Messages
    • Voicemail
  • 8. XMPP Sample Code:
    • // Create a connection  
    • ConnectionConfiguration connConfig =                   new ConnectionConfiguration(
    • host, Integer.parseInt(port), service);  
    • XMPPConnection connection = 
    • new XMPPConnection(connConfig); 
  • 9. Important Links:
    • ANDROID sample program using XMPP: http://davanum.wordpress.com/2007/12/31/android-just-use-smack-api-for-xmpp/
    • XMPP Information
    • http://www.xmpp.org/about/
    • Differences between XMPP and GTalk Service:
    • http://code.google.com/android/migrating/m3-to-m5/m5-api-changes.html
    • Google Talk
    • http://code.google.com/apis/talk/index.html
    • GtalkService package summary:
    • http://code.google.com/android/reference/com/google/android/gtalkservice/package-summary.html
    • Google Talk XMPP Extensions
    • http://code.google.com/apis/talk/jep_extensions/extensions.html