java - setRecycledViewPool method in RecyclerView

Question

I am trying to understand what the setRecycledViewPool method actually does along with the RecyclerView in the following line of code where mrecyclerView is a RecyclerView object:

mrecyclerView.setRecycledViewPool(new RecyclerView.RecycledViewPool());

I read the Android documentation link and I still don't understand what it does clearly. Can someone explain to me its use and when to use it?

Answer 1

setRecycledViewPool(...) can be useful when we have a nested RecyclerView. See this blog post for details. A short description of the same link is added here.

Consider a case where you have a nested RecyclerViews and inner RecycleViews share the same view structure. RecycledViewPool provides a seemless way to share views between these inner (nested) RecyclerViews.

An example of such case could be seen in the following image:

As you can see the types of views for both lists are same.