Use default theme for StandaloneActivity (DocumentsUI).

        <item name="android:windowSoftInputMode">stateUnspecified|adjustUnspecified</item>

    </style>

    <style name="StandaloneTheme" parent="android:Theme.Light">

    <style name="StandaloneTheme" parent="android:Theme.DeviceDefault.Light">

        <item name="android:actionBarWidgetTheme">@null</item>

        <item name="android:actionBarTheme">@*android:style/ThemeOverlay.Material.Dark.ActionBar</item>

        <item name="android:actionBarPopupTheme">@*android:style/ThemeOverlay.Material.Light</item>