Is there a callback for when RecyclerView has finished showing its items after I've set it with an adapter?

Question

Background

I\'ve made a library that shows a fast-scroller for RecyclerView (here, in case anyone wants), and I want to decide when to show and when to hide the fa

Answer 1

I'm using the 'addOnGlobalLayoutListener' for this. Here is my example:

Definition of an interface to perform the action required after the load:

public interface RecyclerViewReadyCallback {
  void onLayoutReady();
}

on the RecyclerView, I trigger the onLayoutReady method when the load is ready:

mRecyclerView.getViewTreeObserver().addOnGlobalLayoutListener(() -> {
  if (recyclerViewReadyCallback != null) {
    recyclerViewReadyCallback.onLayoutReady();
  }
  recyclerViewReadyCallback = null;
});

Note: The set to null is necessary to prevent the method from being called multiple times.