Create a new group

Smack Smack Dev
1

Hi,

I want to add a new group to the roster,using connection.getRoster().createGroup(“new group”).

Yes, it is done successfully. however, when I sign out and sign in again the new group seems to dispear.

What is the problem? Thank you very much!

2

Jason,

I’'m adding the following note to the Javadoc on the createGroup method:

Note: you must add at least one entry to the group for the group to be kept after a login/logout. This is due to the way that XMPP stores group information.

If you turn on Smack debugging, you’‘ll see how group information is transmitted. A roster is always a flat list of XMPP addresses, with the list of groups that each entry belongs to as an attribute. So, if at least one user doesn’'t belong to a group then there is no place to store info about that group. I hope that helps!

Regards,

Matt

3

Thank you so much for ur quick reply, matt.

it is quite helpful.

4

Hi ,Matt, one more qusetion.

there is a method getName() in the class RosterEntry,which returns something like nickname,doesnt it?

Then how can I create this kind name for the login account.I cannot find it in the AccountManager.

5

Jason,

A user doesn’‘t get to determine what their own name is in someone else’'s roster. Instead, when you add someone to your roster, you give them a name.

I just looked over the Roster and RosterGroup API’‘s and this may not be very clear. I’'m going to add a few methods such as:

public void addEntry(String XMPPAddress);

public void addEntry(String XMPPAddress, String name);

That first method will just make the name of the roster entry be the person’'s username (so, jsmith in the address jsmith@example.com).

There are a couple of JEP’‘s in development by the JSF that address user profile data in a more general way, including by using vcards. When one of those methods becomes the standard, I’'ll improve the AccountManager class to expose that information.

Regards,

Matt