public class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder> {

    private List<String> nameList;

    public MyAdapter(List<String> list) {
        nameList = list;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
        View view = inflater.inflate(R.layout.item, parent, false);
        MyViewHolder myViewHolder = new MyViewHolder(view);
        return myViewHolder;
    }

    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, final int position) {
        final String name = nameList.get(position);
        holder.textView.setText(name);
    }

    @Override
    public int getItemCount() {
        if (nameList==null) {
            return 0;
        } else {
            return nameList.size();
        }
    }

    public class MyViewHolder extends RecyclerView.ViewHolder {
        public TextView textView;

        public MyViewHolder(View itemVieww) {
            super(itemVieww);
            textView = itemView.findViewById(R.id.textView);
        }
    }
}