MyRecyclerAdapter

public class MyRecyclerAdapter extends RecyclerView.Adapter<MyRecyclerAdapter.ViewHolder> {

    private MesFragment mParentFragment;
    private ArrayList<ItemMes> mListaItens;
    private Context mContext;

    public MyRecyclerAdapter(ArrayList<ItemMes> lista, MesFragment parent, Context ctx) {
        mListaItens = lista;
        mParentFragment = parent;
        mContext = ctx;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        // create a new view
        View v = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.item_mes_layout, parent, false);

        // set the view's size, margins, paddings and layout parameters

        ViewHolder vh = new ViewHolder(v);
        return vh;
    }

    @Override
    public void onBindViewHolder(final ViewHolder holder, final int position) {

        ItemMes item = mListaItens.get((position));

        holder.descricao.setText(item.getDescrição());
        holder.valor.setText(MainActivity.decimalFormatWithCod.format(item.getValor()));

        if (item.getTipoItem().equals(ItemMes.TIPO_ITEM_RECEITA)) {
            holder.valor.setTextColor(ContextCompat.getColor(mContext, R.color.cor_valor_entrada));
        } else if (item.getTipoItem().equals(ItemMes.TIPO_ITEM_DESPESA)) {
            holder.valor.setTextColor(ContextCompat.getColor(mContext, R.color.cor_valor_saida));
        }

        holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {

                new MaterialDialog.Builder(mContext)
                        .title(holder.descricao.getText().toString())
                        .items(R.array.opcoes_longclick_item)
                        .itemsCallbackSingleChoice(-1, new MaterialDialog.ListCallbackSingleChoice() {
                            @Override
                            public boolean onSelection(MaterialDialog dialog, View view, int which, CharSequence text) {

                                switch (which) {
                                    case 0:
                                        mParentFragment.showUpdateItemDialog(position);
                                        return true;

                                    case 1:
                                        mParentFragment.showDeleteItemDialog(position);
                                        return true;
                                }

                                return false;
                            }
                        })
                        .show();

                return true;
            }
        });

    }

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

    public ArrayList<ItemMes> getList() {
        return mListaItens;
    }

    // Essa classe associa itens da View criada no onCreateViewHolder
    // com os views declarados no layout. É por essa classe que vamos setar os valores da lista para os views no metodo onBindViewHolder
    // Sim, é complicado...
    public class ViewHolder extends RecyclerView.ViewHolder {

        public TextView descricao;
        public TextView valor;

        public ViewHolder(View view) {
            super(view);

            descricao = (TextView) itemView.findViewById(R.id.descricao);
            valor = (TextView) itemView.findViewById(R.id.valor);

        }
    }
}