recyclerview No adapter attached; skipping layout

Question

Just implemented RecyclerView in my code, replacing ListView.

Everything works fine. The data is displayed.

But error messages are

Answer 1

I was getting the same two error messages until I fixed two things in my code:

(1) By default, when you implement methods in the RecyclerView.Adapter it generates:

@Override
public int getItemCount() {
    return 0;
}

Make sure you update your code so it says:

@Override
public int getItemCount() {
    return artists.size();
}

Obviously if you have zero items in your items then you will get zero things displayed on the screen.

(2) I was not doing this as shown in the top answer: CardView layout_width="match_parent" does not match parent RecyclerView width

//correct
LayoutInflater.from(parent.getContext())
            .inflate(R.layout.card_listitem, parent, false);

//incorrect (what I had)
LayoutInflater.from(parent.getContext())
        .inflate(R.layout.card_listitem,null);

(3) EDIT: BONUS: Also make sure you set up your RecyclerView like this:

NOT like this:

I have seen some tutorials using the latter method. While it works I think it generates this error too.