samples/SupportLeanbackShowcase/app/src/main/res/values/themes.xml

<resources>

    <style name="Theme.Example.Leanback" parent="Theme.Leanback">
        <item name="android:windowEnterTransition">@android:transition/fade</item>
        <item name="android:windowExitTransition">@android:transition/fade</item>
        <item name="android:windowSharedElementExitTransition">@android:transition/move</item>
        <item name="android:windowSharedElementEnterTransition">@android:transition/move</item>
        <item name="android:windowAllowReturnTransitionOverlap">true</item>
        <item name="android:windowAllowEnterTransitionOverlap">true</item>
        <item name="android:windowContentTransitions">true</item>
        <item name="android:colorPrimary">@color/search_color</item>
        <item name="android:colorAccent">@color/accent</item>
        <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14</item>
        <!-- <item name="imageCardViewStyle">@style/ImageCardViewColoredTextStyle</item> -->
    </style>

    <style name="Theme.Example.LeanbackWizard" parent="Theme.Leanback.GuidedStep">
        <item name="guidedActionsContainerStyle">@style/WizardActionsContainerStyle</item>
    </style>

    <style name="Theme.Example.LeanbackDialog" parent="Theme.Leanback.GuidedStep">
        <item name="guidedActionsContainerStyle">@style/DialogActionsContainerStyle</item>
    </style>

    <style name="Theme.Example.LeanbackPreferences" parent="Theme.Leanback">
        <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14</item>
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:backgroundDimEnabled">true</item>
        <item name="android:colorPrimary">@color/settings_background</item>
    </style>
</resources>