How to connect locally to your application from an android device?

Question

Android

Application on Spring Boot. Tomcat server
I want to check the layout of the application on mobile devices.
How can I connect from different mobile devices on android to my application, which is running locally from the development environment?

It is desirable that you can view the application from a real android device, and not from an emulator, but I would also look at the option with an emulator