Custom Attributes in Themes

attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <attr name="mp_toolbar_style" format="reference" />
    <attr name="mp_header_style" format="reference" />
    <attr name="mp_select_color" format="reference" />
</resources>

themes.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!--
            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
        -->
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
        <item name="mp_toolbar_style">@style/Toolbar.Light</item>
        <item name="mp_header_style">@style/Header.Light</item>
        <item name="mp_select_color">@color/color_light</item>
    </style>
  
  <!-- A second theme. No code changes necessary. The only difference is what is defined by the custom attributes. -->
  <style name="AnotherTypeAppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
        <item name="mp_toolbar_style">@style/Toolbar.Dark</item>
        <item name="mp_header_style">@style/Header.Dark</item>
        <item name="mp_select_color">@color/color_dark</item>
    </style>
</resources>