Toolbar Animation with Android Design Support Library

Hi all, i want realize a page like the one below, using xamarin.forms mixing up some renderers.

This is a pure Android example, and it works fine http://blog.iamsuleiman.com/toolbar-animation-with-android-design-support-library/
but how to achieve it with .forms?

As shown in the example code, the page is composed by a
CoordinatorLayout
. AppBarLayout
.. CollapsingToolbarLayout
... ImageView (etc...)
. RecycleView --> It should be fine use the .forms listview here, but how?