Fragment vs Activity

There is something I don't get it in here. Why is it that everything for the lib is created from a fragment.
Does is mean that if my login UI was in an activity, I will have to create a fragment so that I can create an instance of *_FacebookSocialNetwork *_ because it only receives a Fragment and a list of permissions required.
It seems the old version - which has a certain bug that was fixed with 0.3.3 - had this

``````
FacebookSocialNetwork fbNetwork = new FacebookSocialNetwork(socialNetworkManager, activity, fbScope);
``` but now all this is not there as of version 0.3.3.

Does anyone know any implementation that does not have a UI inflated inside a fragment? i.e. in an Activity ?
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