ring_shape.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape
            android:innerRadius="50dp"
            android:shape="ring"
            android:useLevel="false">

            <gradient
                android:type="linear"
                android:angle="180"
                android:startColor="@color/skyblue"
                android:centerColor="@color/colorPrimary"
                android:endColor="@color/orange" />

        </shape>
    </item>
</layer-list>