How to make RecyclerView scroll smoothly?

Question

This is more like a generic question, but after lot of search and try I am not able to understand why this is so difficult to achieve. This is the closest answer I can find

Answer 1

Use a library as said by other comments in here. Also make sure you do not have Recyclerviews nested within a Scrollview. This was one of the reason why mine previously wasn't so smooth.