How to make a common variable for two fragments?

Question

Java

Good afternoon. There is a RecyclerView in Fragment #1 and Fragment 2 with a couple of buttons. Both fragments are inside ViewPager. From Fragment #1, by clicking on the button, I can add items to the RecyclerView, but I want to do this from Fragment #2. That is, by pressing a button in the fragment, create one item for the Recyclerview and place it without going to the fragment with the RecyclerView. My idea is to make a generic adapter, set it in a fragment with a RecyclerView, and add items in a fragment without a RecyclerView. What's the best way to do this?

Answer 1

https://metanit.com/java/android/8.5.php