How to link an android app to a website?

Question

Android

Hello, I want to create an android application for the site
I'm not too experienced in android development and I can't come up with an implementation.
One of the options was the idea to use api for the site, but there are doubts about security.
I wanted to know if there are ready-made projects android application + site to it so that you can I had to figure out how it works
. Searching, I didn’t find anything (maybe I was looking badly)
If someone saw it, please give a link.
What do I need in the application: registration and authorization, I also thought about the option with a browser-based android application, but this is not what I wanted

Answer 1

there was an idea to use api for the site but there are doubts about security

What is the security issue? Through api you will give the same data that is on the site but in a different format.
So the method is quite suitable.