Droid Newbie question: Code only interface?

Hi guys,
Im new to Xamarin.Droid and looking at converting my existing iOS app. In iOS I have a code only interface and Im trying to do the same in Droid, but all the examples I see use xaml to set out the controls.

In my example:
I have a parent view (inherits from RelativeLayout) that will contain 2 custom draw child views (should inherit from...). 1st child is to be aligned to the top of the parent but with a given height, the 2nd view is aligned to the remainder of the parent.

Is it possible to do this in code?

Many thanks!
John