I decided to learn Android Developing, and after some time it came to create first app, that does something (even if creation process is just a copy from YouTube lesson. Fast changing technologies quickly loose their relevance to those free online lessons, so my app doesn’t work, and I don’t know where the problem and how to fix it.
My app is a simple calculator. When I decided to try if just one button works, app crashed in AVD.
My current Android Studio is Jellyfish 2023.3.1
Here’s code: