Ulrich Scheller Ulrich Scheller - 1 year ago 99
Java Question

How to set/get profile data with XMPP using Smack

I am working on a XMPP client on Android, using the Smack library. The roster/messaging/presence stuff is running very well. However, I didn't find a way to store additional profile information (userpicture, the dogs name, ...).

The only way I see from googling is using VCards. But it simply did not work. I tried the following:

VCard vCard = new VCard();
vCard.setField("blafasel", "asdf");

Then I was looking for a way to see that VCard information. It did neither show up in iChat nor in this System.out:

vCard.load(connection, user);
System.out.println(user + " has this vCard: " + vCard.toXML());

So anything went wrong, but theres no indication what it was. I tried this with the google talk server and my own copy of openfire with the same result. Btw, I am using this version of Smack: http://davanum.wordpress.com/2007/12/31/android-just-use-smack-api-for-xmpp/

What am I doing wrong here? What is the correct way of storing profile related information with Smack?

Answer Source

I have checked out the source of Smack and went through the important parts with a debugger, as well as using the Smack Debug Window. The problem is inside the VCard implementation of the Smack API. Saving a VCard does work as described, however the loading is broken.

parseIQ(XmlPullParser parser) is part of the PacketReader.java class and handles different types of packages. It only handles tags with the following namespaces:

"jabber:iq:auth", "jabber:iq:roster", "jabber:iq:register", "urn:ietf:params:xml:ns:xmpp-bind"

It also looks if there is any registered IQProvider in the ProviderManager. And this is the root of my problem. There is no IQProvider for VCards registered. So whatever information is inside of the vCard tag simply gets dropped.

It is not too hard to register this IQProvider though:

	ProviderManager.getInstance().addIQProvider("vCard", "vcard-temp", new VCardProvider());

This solved my little example above for saving my own vCard and downloading it again. I am still having trouble with downloading other users vcards... Gonna have a closer look into this and maybe open up another thread for that issue.

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