attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
        <declare-styleable name="com.google.ads.AdView">
                <attr name="backgroundColor" format="color" />
                <attr name="primaryTextColor" format="color" />
                <attr name="secondaryTextColor" format="color" />
                <attr name="keywords" format="string" />
                <attr name="refreshInterval" format="integer" />
        </declare-styleable>
</resources>