A ripple with a gradient overlay

ripple_gradient_layer-list.xml

<ripple xmlns:android="http://schemas.android.com/apk/res/android"
        android:color="@color/colorPrimary">
    <item>
        <layer-list>
            <item>
                <shape android:shape="rectangle">
                    <gradient
                            android:angle="90"
                            android:centerColor="#00ffffff"
                            android:endColor="#00ffffff"
                            android:startColor="#aa000000" />
                    <corners android:radius="0dp" />
                </shape>
            </item>
        </layer-list>
    </item>
</ripple>