Specific Attributes for the Thermometer View

attrs.xml

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

    <declare-styleable name="Thermometer">
        <attr name="radius" format="dimension" />
        <attr name="outerColor" format="color" />
        <attr name="middleColor" format="color" />
        <attr name="innerColor" format="color" />
    </declare-styleable>

</resources>