theme_for_activity_with_translucent_window.xml

<resources xmlns:tools="http://schemas.android.com/tools">
    
    <!-- Transparent Window Activity -->
    <style name="AppTheme.TransparentWindow" parent="AppTheme.CustomToolbar">
        <!--
        We want the translucent background painted by the root layout instead
        of painted by the window.
        -->
        <item name="android:windowIsTranslucent">true</item>
        
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:windowIsFloating">false</item>
        <item name="android:backgroundDimEnabled">false</item>
        <item name="android:colorBackgroundCacheHint">@null</item>
    </style>
</resources>