How to enable session tracking in android application client

I'm now developing my first Android application.

My application interacts with a web service using SOAP messages. The web service sits in glassfish4 server.

So I want that every user that interacts with the web service will get a new instance of the class that represents the web service.

I read how to do this, I need to add the @HttpSessionScope annotation to the web service class.

But what should I write on the client side, in the android application to enable the session tracking?

Thanks