How do you look at writing an android app without using android xml?

Question

Java

Hello, I'm new to this, but I want to know if it's possible to write an application without using the android markup language at all, but using only Canvas and the awt class package from Java?
I must say that the application that I plan to write does not look at all according to android xml standards, hence the question, is it worth using it at all
? a pretty fixed thing in use and you can’t do many interesting things with it. Well, for example:

No matter how I tried, I could not achieve such an arrangement of buttons relative to each other. Constantly something moved out, disappeared, cut off. But then I also planned to make a beautiful and not the easiest (for android xml) animation for these buttons.
I think without xml everything would be much easier, I threw the button to the right place (calculating the number of pixels per dpi so that it looks adequate on all devices), drew it, animated it and rejoice at myself that everything works well.
Correct me if I'm wrong and put me on the right path, I beg you.