rounded_fg.xml

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:innerRadiusRatio="5"
    android:shape="ring"
    android:thicknessRatio="1"
    android:useLevel="false">
    <gradient
        android:type="radial"
        android:gradientRadius="5dp"
        android:endColor="@color/colorPrimary"
       />
</shape>