SchildiChat-android/vector/src/main/res/values-v21/theme_black.xml

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

    <style name="AppTheme.Black.v21" parent="AppTheme.Base.Black">
        <item name="android:statusBarColor">@color/riotx_header_panel_background_black</item>
        <item name="android:navigationBarColor">@color/riotx_header_panel_background_black</item>

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

        <!-- specify shared element enter and exit transitions -->
        <item name="android:windowSharedElementEnterTransition">@transition/image_preview_transition</item>
        <item name="android:windowSharedElementExitTransition">@transition/image_preview_transition</item>
    </style>

    <style name="AppTheme.Black" parent="AppTheme.Black.v21" />

</resources>