InboxRecyclerView | Build expandable descendant navigation , inspired by Google | Game Engine library

Background

I am trying to implement the "parent-to-child" navigational transition specifically when you click a Recyclerview entry and the details appear in a fullscreen fragment. Something like this:

Question

How do I go about doing this with so many animation APIs available? (TransitionManager.beginDelayedTransition, SharedTransition, setExitTransition, etc)

What I have tried

• InboxRecyclerView - This matches my requirements EXCEPT that it seems to only work when the detail view is in the same layout as the Recyclerview. Because I am navigating between fragments using the fragment backstack, I need it to transition between layouts that might not be available prior to attachment.

• This post - Answers only cover activity-to-activity transitions. I am looking for fragment-to-fragment.

• Custom Transition - I tried extending the Transition class, but I ran into the problems. CaptureStartValues() seems to capture values from the entire scene. I need it to only capture values from the recyclerview entry. Also, for some reason, the end values are not captured seeing as I get null endValues in the function createAnimator(ViewGroup sceneRoot, TransitionValues startValues, TransitionValues endValues).

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