<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

        <item name="popupMenuStyle">@style/PopupMenu</item>

    </style>

    <style name="PopupMenu" parent="@android:style/Widget.PopupMenu">
      <item name="android:popupBackground">@android:color/white</item>
    </style>

<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light">
   <item name="android:background">@android:color/white</item>
</style>