How to create your own interfaces for android applications?

Question

Android

Hello dear programmers. I’m interested in the question because of which I can’t sleep normally. I created, for example, a calculator for android and I don’t like the default design of the buttons, I want to make the buttons myself, for example, round or something like that. Could would you help me? If you can, leave the articles so that there is a crust of knowledge in this topic. Thank you in advance. Good to you)))

Answer 1

You can do any fantasy on OpenGL. Better on some engine for games.
There is also QML.

Answer 2

It's easy to google: pyatnitsev.ru/2013/11/03/android_custim_buttons
But in general, these are bad practices. Because different droids have different designs, and the user will be infuriated when your flat buttons get out of the volumetric design (or vice versa).