indicator_default.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

    <item>

        <shape android:shape="ring"
                android:innerRadius="0dp"
                android:thickness="4dp"
                android:useLevel="false">

            <solid android:color="@color/tab_indicator_gray" />



        </shape>



    </item>



</layer-list>