The answer is a bit late, but found a solution to the problem.
In styles.xml, where you have the AppTheme:
<style name="AppTheme" parent="AppBaseTheme">
<item name="android:dropDownListViewStyle">@style/ListViewStyle</item>
<item name="dropDownListViewStyle">@style/ListViewStyle</item>
<item name="popupMenuStyle">@style/PopupMenu</item>
<item name="textAppearanceLargePopupMenu">@style/PopupMenuTextAppearanceLarge</item>
<item name="textAppearanceSmallPopupMenu">@style/PopupMenuTextAppearanceSmall</item>
<item name="android:textAppearanceLargePopupMenu">@style/PopupMenuTextAppearanceLarge</item>
<item name="android:textAppearanceSmallPopupMenu">@style/PopupMenuTextAppearanceSmall</item>
</style>
PopupMenuStyle for popupMenu itself, in this case we can change the unselected background to popupBackground, like this (but you already know this):
<style name="PopupMenu" parent="@android:style/Widget.PopupMenu">
<item name="android:popupBackground">@drawable/selector_popup_menu_bg</item>
<item name="android:textColor">@color/text_color_white</item>
<item name="android:dropDownSelector">@drawable/selector_popup_menu_dropdown</item>
</style>
textColor dropDownSelector, , , , parent (Widget.PopupMenu).
, AppTheme, AppTheme. textAppearances, .
, ( "android:" ), 5.0, - . popupMenuStyle "android:", Popup, support.v7, android:popupMenuStyle (fooobar.com/questions/1561635/...).
, dropDownListViewStyle ( ):
<style name="ListViewStyle" parent="@android:style/Widget.ListView">
<item name="android:listSelector">@drawable/selector_popup_menu_dropdown</item>
<item name="android:divider">@color/text_color_white</item>
<item name="android:dividerHeight">1dp</item>
</style>
listSelector, . @color, ( , ), , :
selector_popup_menu_dropdown.xml
<?xml version="1.0" encoding="utf-8"?>
<item android:state_window_focused="false" android:drawable="@android:color/transparent" />
<item android:state_focused="true" android:state_enabled="false" android:state_pressed="true" android:drawable="@color/gray_btn_bg_color" />
<item android:state_focused="true" android:state_enabled="false" android:drawable="@color/gray_btn_bg_color" />
<item android:state_focused="true" android:state_pressed="true" android:drawable="@color/gray_btn_bg_color" />
<item android:state_focused="false" android:state_pressed="true" android:drawable="@color/gray_btn_bg_color" />
<item android:state_focused="true" android:drawable="@color/gray_btn_bg_color" />
, . Yaay!