How to collapse/expand a view based on scroll direction?

Question

I have a View and a RecyclerView housed in a LinearLayout. What I want to achieve is something like this:

https://material.google.com/patterns/scrolling-techniques.h

Answer 1

You have to use Coordinator Layout with the CollapsingToolbarLayout

     //HERE you should take a look what you want your collapse bar do.

        

        
    




    

Obs: the comments will give errors if you put on a xml file. Is on propose so you will remember to read hahahah