How to know the max amount of ItemViews that can be visible in the RecyclerView without loading the data?

I have a paging algorithm for the RecyclerView, which if done Scroll, a scrolling listener triggers and loads more elements. Initially, I assigned a number of elements to load in the request to the server by default that is 20 for my RecyclerView, which has a fixed size (not wrap_content).

I need to know the number of items that can be visible in the width/height of the defined RecyclerView before loading the data, to determine the amount of items to be requested in the initial load, given that with 20 items on some devices is not enough to activate the listener of the scroll and load more elements.

This is without considering the extra properties of the view, such as padding, margin etc ...

The solution can be in Java Android or Xamarin Android (not Forms) C#.

Update:

For you to have a clue, i have tried this and it works for me, only if I call it when the size of RecyclerView is assigned, inside the OnLayoutChange:

public int GetMaxVisibleItemCountFromRecyclerView(RecyclerView recyclerView)
{
             if (recyclerView == null) return 0;

             int Width = recyclerView.Width;
             int Height = recyclerView.Height;

             if (Width == 0 || Height == 0)
                return 0;

             var layoutManager = recyclerView.GetLayoutManager() as GridLayoutManager;

             if (layoutManager == null) return 0;

             int widthRatio = Width / layoutManager.SpanCount;
             int quantity = (Height / widthRatio) * layoutManager.SpanCount;

             return quantity;

}

This solution only works for RecyclerViews that use the GridLayoutManager. I have other RecyclerViews with defined sizes that also use the paging algorithm with a LinearLayoutManager.

I need a similar solution, that works with any LayoutManager of the RecyclerView and does not have to be called inside the OnLayoutChange, is this possible?

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