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Impelement two recyclerview in one screen

How can I implement this kind of UI, where we have two recyclerViews. One scrolls horizontally and the second one vertically. when the second one scrolls first one also scrolls top together.
I tried to implement using NestedScrollView, but I had to make second recyclerView height wrap content which causes recyclerView not recycle.
The second way that I tried was having one recyclerView. And adding horizontal recyclerview as a header. The problem was to save header recyclerview scroll state when navigation. And there had been crashes when loading next page (paging 3) in header recyclerView.
The question is: Is there any optimal solution for this kind of ui?

In cases, Like this, you don't have to use 2 RecyclerView and you also have to avoid using RecyclerView insideScrollView. instead of this you have to use one vertical RecyclerView with multitype view Adapter.
in this way, you are going to have 2 different ViewHolder one of them is a horizontal recyclerView (your top item) and the other one is your other items.
for learning multitype adapter you can see this:
How to create RecyclerView with multiple view types
and for a horizontal recyclerView inside a vertical RecyclerView you can see this :
https://medium.com/#ashishkudale/android-list-inside-list-using-recyclerview-73cff2c4ea95
you have to combine these 2.
I could not understand the meaning of "header" where you said "adding horizontal recyclerview as a header" but if you did what I told and the problem is the state of inner Horizontal recyclerView, I think probably you are calling setAdapter method of horizontal RecyclerView in OnBind() method of your vertical recycler view, it is a common mistake that I have seen in many tutorials.
if you have done this mistake , try to call setAdapter of your inner recyclerView in the constructor of its viewHolder and just update the list using yourHorizontalAdapter.notifyDataSetChanged() in onBind() method of VerticalRecylerView,
and if its not the case and your recyclerView is completely destroying see this link :How to save RecyclerView's scroll position using RecyclerView.State?

How to make row list using recyclerView and card? Can I use Nested RecyclerView?

I'm trying to design a row list using RecyclerView like Android TV ↳ android.support.v17.leanback.widget.ListRow. I'm able to design list with title but not row list. Can anyone help me?

Please Follow this Link for
Recycer view like play store
Use Two RecyclerView Outer Recycler is vertical and Second horizontal recycler is item of first recycler View
All you need is to call mInnerRecycler.setNestedScrollingEnabled(false); on your inner RecyclerViews and use Horizontal scrollview as root of mInnerRecyclerView
Explanation:
RecyclerView has support for nested scrolling introduced in API 21 through implementing the NestedScrollingChild interface. This is a valuable feature when you have a scrolling view inside another one that scrolls in the same direction and you want to scroll the inner View only when focused.
In any case, RecyclerView by default calls RecyclerView.setNestedScrollingEnabled(true); on itself when initializing. Now, back to the problem, since both of your RecyclerViews are within the same ViewPager that has the AppBarBehavior, the CoordinateLayout has to decide which scroll to respond to when you scroll from your inner RecyclerView; when your inner RecyclerView's nested scrolling is enabled, it gets the scrolling focus and the CoordinateLayout will choose to respond to its scrolling over the outer RecyclerView's scrolling. The thing is that, since your inner RecyclerViews don't scroll vertically, there is no vertical scroll change (from the CoordinateLayout's point of view), and if there is no change, the AppBarLayout doesn't change either.
In your case, because your inner RecyclerViews are scrolling in a different direction, you can disable it, thus causing the CoordinateLayout to disregard its scrolling and respond to the outer RecyclerView's scrolling.
Notice:
The xml attribute android:nestedScrollingEnabled="boolean" is not intended for use with the RecyclerView, and an attempt to use android:nestedScrollingEnabled="false" will result in a java.lang.NullPointerException so, at least for now, you will have to do it in code.

RecyclerView can check View Type for return header or item. And use layout manager for manage how to item scrolling direction.
RecyclerView (vertical scrolling)
- item -> RecyclerView (horizontal scrolling) check view type is header or item with condition example : is object has type header
Ref : Google play store like interface using recycler view

Scroll to child Recyclerview item in Nested Recyclerview

Context
I have a nested Recyclerview like the following sketch shows you:
In the drawing you can see a RecyclerView, which in turn holds one RecyclerView each as item.
Question
My question now is: How can I get the outer, parent Recyclerview scroll to a position of one of the child RecyclerViews. In the drawing I marked you Content pos 5 as my target position for example the Child RecyclerView 2.
What I already found out
One approach I've been thinking about was using scrollToPositionWithOffset(position, offset) on the parent RecyclerView, then just scroll to the position of the child RecyclerView 2 and then have the offset as the size of the list of items in the Child RecyclerView. But how can I get the size when the view isn't even inflated?
I would be very happy if one of you could give me some help that also ran into this problem of scrolling to a position of the child RecyclerView in such a nested Recyclerview.

Android RecyclerView scrolls to top when child element is expanded/collapsed

I have a list of elements in a recycler view that are generated dynamically using data binding. Each element has a bottom view that is initially set to View.GONE, however once a user clicks the element and the view is expanded, the recycler view automatically scrolls back to the top of the list. Conversely, if the view is expanded and then clicked again to collapse, the recycler view scrolls to the top of the list again. I have tried keeping track of the ID's of the elements for the adapter (again using data binding), setting focus to the child element when they expand or collapse, and using binding adapters to animate the expand/collapse itself.
My suspicion is that the adapter in the recycler view is receiving a onNotifyDataChanged() alert when the height of one of the child changes, rendering an additional view (still inside one of the children though, not a separate child in the list), and automatically scrolls to the top. Is there a way to override this? Does anyone know what else might be causing the list to snap to the top when one of the elements is clicked -> expanded/collapsed?

So I found the solution to my issue in case someone encounters something similar. I actually ended up finding this answer: RecyclerView notifyDataSetChanged scrolls to top position
and the second solution involving the staggered layout manager was the route I went with, since I want to be able to wrap the content. My suspicions were correct that it had to do with the changing height of the elements in the recycler view. The expandable item's parent wrapped content, so the recycler view was forced to recalculate the size of the item once the expandable portion appeared/disappeared (at least that's what I got out of it).

Hide footer in RecyclerView when all items fit on screen

I made header and footer in my RecyclerView using typical solution with viewType in Adapter. It works fine, but I want to hide the footer if all RV items fit inside the screen, when nothing to scroll. Is there any way to know that all items will be displayed without scrolling and say to Adapter not to add footer in this case?

You can get scroll offset of recycler view with this code
recyclerView.computeVerticalScrollOffset();
Then you should check if scroll offset is more than your parent views heigh and do what you want ;)