Firestore Paging Adapter- How to know if query returns 0 results

Question

I\'m using firestore paging adapter to populate my RecyclerView with data from Firestore, if collection in Firestore is empty I would like to show a TextV

Answer 1

I solved this problem by simple code. Just override onLoadingStateChangedListner method inside your FirestorePagingAdapter and then use getItemCount. I implemented it as follow -

@Override
protected void onLoadingStateChanged(@NonNull LoadingState state) {
    switch (state){
        case LOADED:
        case FINISHED:
            progressBar.setVisibility(View.GONE);
            if(getItemCount() == 0) {
                emptyIcon.setVisibility(View.VISIBLE);
                recyclerview.setVisibility(View.GONE);
            }
            break;
    }
    super.onLoadingStateChanged(state);
}