attrs.xml

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

    <attr name="shadowOffsetX" format="float" />
    <attr name="shadowOffsetY" format="float" />
    <attr name="shadowAlpha" format="float" />

    <attr name="calculateAsync" format="boolean" />
    <attr name="showWhenAllReady" format="boolean" />
    <attr name="animateShadow" format="boolean" />
    <attr name="animationDuration" format="integer" />

    <declare-styleable name="MaterialShadowViewWrapper">
        <attr name="shadowOffsetX" />
        <attr name="shadowOffsetY" />
        <attr name="shadowAlpha" />

        <attr name="calculateAsync" />
        <attr name="showWhenAllReady" />
        <attr name="animateShadow" />
        <attr name="animationDuration" />
    </declare-styleable>

    <declare-styleable name="MaterialShadowFrameLayoutWrapper">
        <attr name="shadowOffsetX" />
        <attr name="shadowOffsetY" />
        <attr name="shadowAlpha" />

        <attr name="calculateAsync" />
        <attr name="showWhenAllReady" />
        <attr name="animateShadow" />
        <attr name="animationDuration" />
    </declare-styleable>

</resources>