<resources>
    <!-- Default screen margins, per the Android Design guidelines. -->
    <dimen name="activity_margin">16dp</dimen>
    <dimen name="activity_horizontal_margin">16dp</dimen>
    <dimen name="activity_vertical_margin">16dp</dimen>
    <dimen name="fab_margin">16dp</dimen>

    <dimen name="card_corner_radius">4dp</dimen>
</resources>

<resources>
    <!-- Default screen margins, per the Android Design guidelines. -->
    <dimen name="activity_margin">16dp</dimen>
    <dimen name="activity_horizontal_margin">16dp</dimen>
    <dimen name="activity_vertical_margin">16dp</dimen>
    <dimen name="fab_margin">16dp</dimen>

    <dimen name="card_corner_radius">2dp</dimen>
</resources>

Change corner radius for the cards
Change corner radius for the cards
