fluent_ripple.xml

<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:color="#ffffff"
    android:radius="800dp"
    tools:targetApi="lollipop">

    <item android:id="@android:id/mask">
        <shape android:shape="rectangle" >
            <stroke android:color="#ffffff" android:width="1.5dp"/>
            <gradient android:startColor="#42ffffff" android:centerColor="#42ffffff" android:endColor="#ffffff" />
        </shape>
    </item>
</ripple>