Material Design: how to get button text to be regular case (not CAPITAL)?

Question

Android Material Design button style is making button text to 'CAPITAL' letters. How can I get back the text with whatever cases (non-capital, capital) that I supply via string.xml?

<Button
    android:id="@+id/product_add_button"
    style="?android:attr/buttonBarButtonStyle"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:gravity="center"
    android:onClick="onAddItemButtonClick"
    android:paddingLeft="@dimen/row_padding"
    android:paddingRight="@dimen/row_padding"
    android:text="@string/add_item"
    android:textSize="18sp"
    android:textColor="@color/blueberry" />

string.xml

 <string name="add_item">Add Item</string>

Answer 1

加：

android:textAllCaps="false"