RecyclerView_Config.java

public class RecyclerView_Config {
    private Context mContext;
    private CoinsAdapter mCoinsAdapter;
    public void setConfig(RecyclerView recyclerView, Context context, List<Coin> coins, List<String> keys) {
        mContext = context;
        mCoinsAdapter = new CoinsAdapter(coins, keys);
        recyclerView.setLayoutManager(new LinearLayoutManager(context));
        recyclerView.setAdapter(mCoinsAdapter);

    }

    class CoinIteView extends RecyclerView.ViewHolder {
        private TextView mNominal;
        private TextView mYear;

        private String key;

        public CoinIteView(ViewGroup parent) {
            super(LayoutInflater.from(mContext).
                    inflate(R.layout.coin_list_item, parent, false));

            mNominal = (TextView) itemView.findViewById(R.id.nominal);
            mYear = (TextView) itemView.findViewById(R.id.year);

        }
        public void bind(Coin coin, String key){
            mNominal.setText(coin.getNominal());
            mYear.setText(coin.getYear());
            this.key = key;
        }
    }
    class CoinsAdapter extends RecyclerView.Adapter<CoinIteView>{
        private List<Coin> mCoinList;
        private List<String> mKeys;

        public CoinsAdapter(List<Coin> mCoinList, List<String> mKeys) {
            this.mCoinList = mCoinList;
            this.mKeys = mKeys;
        }

        @NonNull
        @NotNull
        @Override
        public CoinIteView onCreateViewHolder(@NonNull @NotNull ViewGroup parent, int viewType) {
            return new CoinIteView(parent);
        }

        @Override
        public void onBindViewHolder(@NonNull @NotNull CoinIteView holder, int position) {
                holder.bind(mCoinList.get(position), mKeys.get(position));
        }

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