Mobile_development/app/src/main/res/animator/card_flip_out.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <objectAnimator
        android:valueFrom="0"
        android:valueTo="90"
        android:propertyName="rotationY"
        android:duration="250" />
</set>