RecyclerView not calling onCreateViewHolder or onBindView

Question

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First Use

recyclerView.setAdapter(adapter);

And then:

recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

So it will look like this:

recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

The order is reversed

Update:

Nowadays I simply use:

app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"

on the RecyclerView in the xml