Understanding RecyclerView setHasFixedSize

Question

I\'m having some trouble understanding setHasFixedSize(). I know that it is used for optimization when the size of RecyclerView doesn\'t change, fr

Answer 1

If we have a RecyclerView with match_parent as height/width, we should add setHasFixedSize(true) since the size of the RecyclerView itself does not change inserting or deleting items into it.

setHasFixedSize should be false if we have a RecyclerView with wrap_content as height/width since each element inserted by the adapter could change the size of the Recycler depending on the items inserted/deleted, so, the size of the Recycler will be different each time we add/delete items.

To be more clear, if we use

We can use my_recycler_view.setHasFixedSize(true)

We should use my_recycler_view.setHasFixedSize(false) , this applies if we also use wrap_content as width