Activity with fragments does not resize when the keyboard opens

Question

In my main activity there is a RelativeLayout that has 2 childs:

• An ImageView which serves as the background
• A LinearLa

Answer 1

Turns out my problem was caused by a completely unexpected source.

What happened is that I used a LinearLayout as the parent of my two fragment containers.
Then, in my expanding animation I raised the bottom container to overlap the other one.

I don't really know why but since LinearLayout is not supposed to hold overlapping children, switching to a RelativeLayout or a FrameLayout immediately solved the issue.

Since this cause might not be apparent from the code I posted, I do want to apologize for the lack of information, and will credit the most detailed answer as the best one.