I use "com.google.android.material:material:1.3.0" in my project. According to Big Nerd Ranch book I try to override styles of CardView for the whole project to avoid setting Style attribute for every CardView. My manifest:
android:theme="@style/Theme.MyProject"
My themes.xml:
<style name="Theme.MyProject" parent="Theme.MaterialComponents.DayNight.NoActionBar">
...
<item name="materialCardViewStyle">@style/MyDesignCardView</item>
</style>
<style name="MyDesignCardView" parent="Widget.MaterialComponents.CardView">
<item name="cardBackgroundColor">@color/cardViewBackground</item>
<item name="cardCornerRadius">5dp</item>
<item name="cardElevation">8dp</item>
</style>
My CardView:
<androidx.cardview.widget.CardView
android:id="@+id/card_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
You should use com.google.android.material.card.MaterialCardView
instead of androidx.cardview.widget.CardView