attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="CircularProgressView">
        <attr name="cpv__backgroundColor" format="color" />
        <attr name="cpv__backgroundColorPressed" format="color" />
        <attr name="cpv__animationTime" format="float" />
        <attr name="cpv__insideRadius" format="dimension" />
        <attr name="cpv__progressWidth" format="dimension" />
    </declare-styleable>
</resources>