styles-v21.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>


    <style name="AppTheme" parent="BaseTheme">

        <!-- enable activity transitions -->
        <item name="android:windowActivityTransitions">true</item>
        <!-- enable window content transitions -->
        <item name="android:windowContentTransitions">true</item>

        <!-- specify enter and exit transitions -->
        <item name="android:windowEnterTransition">@transition/custom_animation</item>
        <item name="android:windowExitTransition">@transition/custom_animation</item>

        <!-- if we don't specify reenter transition, by default exit transition is taken -->
        <!-- if we don't specify return transition, by default enter transition is taken -->
        
        <!-- specify shared element transitions -->
        <item name="android:windowSharedElementEnterTransition">@android:transition/move</item>
        <item name="android:windowSharedElementExitTransition">@android:transition/move</item>

    </style>
</resources>