How to reference style attributes from a drawable?

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In my experience it is not possible to reference an attribute in an XML drawable.
In order to make your theme you need to:

  • Create one XML drawable per theme.

  • Include the needed color into you drawable directly with the @color tag or #RGB format.

Make an attribute for your drawable in attrs.xml.

<?xml version="1.0" encoding="utf-8"?>
<resources>
   <!-- Attributes must be lowercase as we want to use them for drawables -->
   <attr name="my_drawable" format="reference" />
</resources>

Add your drawable to your theme.xml.

<style name="MyTheme" parent="@android:style/Theme.NoTitleBar">
   <item name="my_drawable">@drawable/my_drawable</item>
</style>

Reference your drawable in your layout using your attribute.

<TextView android:background="?my_drawable" />

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