ring-android/app/src/main/res/values-v21/styles.xml

<resources xmlns:android="http://schemas.android.com/apk/res/android">

    <style name="AppThemeWithOverlay" parent="AppThemeBase">
        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
        <item name="android:statusBarColor">@color/color_primary_light</item>
        <item name="android:windowTranslucentStatus">true</item>
    </style>

    <style name="AppThemeWithoutOverlay" parent="@android:style/Theme.Material.Light.DarkActionBar">
        <item name="android:actionBarStyle">@style/NativeActionBar</item>
        <item name="android:colorAccent">@color/color_primary_light</item>
        <item name="android:colorPrimary">@color/color_primary_light</item>
        <item name="android:colorPrimaryDark">@color/color_primary_dark</item>
    </style>

    <style name="AppTheme.ActionBar.Transparent" parent="style/Theme.AppCompat">
        <item name="colorAccent">@color/color_primary_dark</item>
        <item name="colorPrimary">@color/color_primary_light</item>
        <item name="colorPrimaryDark">@color/color_primary_dark</item>
        <item name="preferenceTheme">@style/PreferenceThemeOverlay.v14.Material</item>
        <item name="android:actionBarStyle">@style/ActionBar.Transparent</item>
        <item name="actionBarStyle">@style/ActionBar.Transparent</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="windowActionBarOverlay">true</item>
        <item name="android:windowTranslucentStatus">true</item>
        <item name="android:windowTranslucentNavigation">true</item>
    </style>

    <style name="NativeActionBar" parent="@android:style/Widget.ActionBar">
        <item name="android:background">@color/actionbar</item>
        <item name="android:titleTextStyle">@style/NativeActionBar.Text</item>
        <item name="android:elevation">4dp</item>
    </style>

    <style name="ActionBar.Transparent" parent="@android:style/Widget.DeviceDefault.Light.ActionBar.Solid.Inverse">
        <item name="android:background">@android:color/transparent</item>
        <item name="android:height">@dimen/abc_action_bar_default_height_material</item>
        <item name="background">@android:color/transparent</item>
    </style>

    <style name="NativeActionBar.Text" parent="@android:style/TextAppearance.Material.Widget.ActionBar.Title"></style>
</resources>