<EditText
    android:id="@+id/item_grade_et_quantidade"
    android:layout_width="60dp"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:inputType="number"
    android:imeOptions="actionDone"
    android:selectAllOnFocus="true"
    android:text="0"/>

<android.support.v7.widget.RecyclerView
     android:id="@+id/rv_list_produto_childs"
     android:scrollbars="horizontal"
     android:layout_width="match_parent"
     android:fadeScrollbars="false"
     android:layout_height="185dp" />

rvProdutoChilds.setHasFixedSize(true);
LinearLayoutManager mLinearLayoutManager = new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false);
rvProdutoChilds.setLayoutManager(mLinearLayoutManager);