Detect animation finish in Android's RecyclerView

Question

The RecyclerView, unlike to ListView, doesn\'t have a simple way to set an empty view to it, so one has to manage it manually, making empty view vi

Answer 1

To expand on Roman Petrenko's answer, I don't have a truly universal answer either, but I did find the Factory pattern to be a helpful way to at least clean up some of the cruft that is this issue.

public class ItemAnimatorFactory {

    public interface OnAnimationEndedCallback{
        void onAnimationEnded();
    }
    public static RecyclerView.ItemAnimator getAnimationCallbackItemAnimator(OnAnimationEndedCallback callback){
        return new FadeInAnimator() {
            @Override
            public void onAnimationFinished(RecyclerView.ViewHolder viewHolder) {
                callback.onAnimationEnded();
                super.onAnimationEnded(viewHolder);
            }
        };
    }
}

In my case, I'm using a library which provides a FadeInAnimator that I was already using. I use Roman's solution in the factory method to hook into the onAnimationEnded event, then pass the event back up the chain.

Then, when I'm configuring my recyclerview, I specify the callback to be my method for updating the view based on the recyclerview item count:

mRecyclerView.setItemAnimator(ItemAnimatorFactory.getAnimationCallbackItemAnimator(this::checkSize));

Again, it's not totally universal across all any and all ItemAnimators, but it at least "consolidates the cruft", so if you have multiple different item animators, you can just implement a factory method here following the same pattern, and then your recyclerview configuration is just specifying which ItemAnimator you want.