Generic class that extends class and implements interface

T must extend Fragment and implement SomeInterface

In that case you could declare SomeClass as the following:

public class SomeClass<T extends Fragment & SomeInterface>

That would require an object of type T to both extend Fragment and implement SomeInterface.

Further, using my T class, I want to create views, using T.getActivity() as Context.

I’m unfamiliar with Android, but if getActivity() is a public instance method declared in Fragment then will be entirely possible to call it on an instance of T, since the compiler will know all Ts must inherit that method.