Android - Double RecyclerView and CollapsingToolbarLayout

Question

I'm currently developing an App which needs to display a vertical list, with horizontal list for each child. This view is using a CoordinatorLayout (with a CollapsingToolbarLayout). The problem is that when I scroll (vertically), the Toolbar isn't collapsing.

I noticed that the problem occurs only if the vertical list's item are horizontal lists.

Here is a picture explaing my problem :

Thanks in advance !

Answer 1

Ok, I finally found a solution here , using setNestedScrollingEnabled(false) on the child RecyclerView ! :)