RecyclerView.ItemDecoration doesn't update after item is removed from RecyclerView.Adapter

Question

My question

How can I get my ItemDecoration to \"update\" the item offsets for other views when I remove a given view from my adapter and the

Answer 1

ListAdapter solution:

listAdapter.submitList(newList) {
    handler.post { // or just "post" if you're inside View
        recyclerView.invalidateItemDecorations()
    }
}

The key is new submitList(list, commitCallback) method from latest RecyclerView release. It allows you to call invalidateItemDecorations() after ListAdapter will apply all changes to RecyclerView.

I also had to add post {} call to make it work - without it decorations invalidated too early, and nothing happens.