How to set listview dividers properly on android?

Our Android app has been without list dividers on android and I have reasons to think this is due the Default theme.
After I change the theme to Holo Light the dividers start showing up, but I didn't want to change the default theme.

I did this by adding
Theme = "@android:style/Theme.Holo.Light" in my mainActivity header

How can I set the android style just to include the dividers with a black color?

I've tried to do it by creating my own style/theme but didnt seem to work
my manifest I've added

    <application android:label="myApp.android" android:icon="@drawable/Icon" android:theme="@style/AppTheme">

AppTheme.xml

    <?xml version="1.0" encoding="utf-8" ?>
    <resources>
      <style name="AppTheme">
        <item name="android:listViewStyle">@style/App_ListViewStyle</item>
      </style>
    </resources>

==ListViewStyle.xml==

    <?xml version="1.0" encoding="utf-8" ?>
    <resources>
      <style name="App_ListViewStyle" parent="@android:style/Widget.ListView">
        <item name="android:headerDividersEnabled">false</item>
        <item name="android:divider">#FF0000</item>
        <item name="android:dividerHeight">4sp</item>
      </style>
    </resources>