fxy-pda/app/src/main/res/drawable/tab_bg.xml

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:bottom="-1dp"
        android:left="-1dp"
        android:right="-1dp">
        <shape>
            <solid android:color="@color/white"/>

            <stroke
                android:width="0.5dp"
                android:color="@color/md_grey_300"
            />
        </shape>
    </item>

</layer-list>