habitica-android/Habitica/res/drawable/subscription_selected.xml

<?xml version="1.0" encoding="utf-8"?>

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

    <item>
        <shape android:shape="oval">
            <corners android:radius="@dimen/daily_checkbox_corner_radius"/>
            <solid android:color="@color/white" />
            <stroke android:color="@color/transparent" android:width="5dp" />
        </shape>
    </item>
    <item>
        <shape android:shape="oval">
            <corners android:radius="@dimen/daily_checkbox_corner_radius"/>
            <stroke android:color="@color/white" android:width="1dp" />
            <size android:height="16dp" android:width="16dp" />
        </shape>
    </item>
</layer-list>