Layer List Ignore Tag

I want to create a custom Radio Button. I using with and to show small circle on large circle, when the user select it. But it seems to ignore

Solution 1:

I've seen this problem a lot, and the only solution I found is:

<itemandroid:left="10dp"android:right="10dp"android:top="10dp"android:bottom="10dp"><shape><solidandroid:color="@color/blue"/></shape></item>

If you have a better solution - answer!