How to send invitation to gtalk contact with smack java library?

Question

How to send invitation to gtalk contact with smack java library?

Answer 1

//Setting up connection
ConnectionConfiguration config = new ConnectionConfiguration("talk.google.com", 5222, "gmail.com");
        connection = new XMPPConnection(config);
        connection.connect();
//login
        connection.login(userName, password);
//get your roster   
    Roster roster = connection.getRoster();
//add a new roster entry aka SEND INVITATION

roster.createEntry(address, name, groups);

For further details look this page: http://www.igniterealtime.org/builds/smack/docs/3.1.0/javadoc/org/jivesoftware/smack/Roster.html