cardlayoutattempt.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.wdget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/card_background_selector">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="Medium Text"
        android:id="@+id/cardLayoutTrial"
        android:layout_gravity="center_horizontal" />
</android.support.v7.wdget.CardView>