"classes, methods, etc." scroll?

Question

Android

Please help knowledgeable and sympathetic. The crux of the matter: tell me where there is a list of methods, classes, "commands" for android studio (more likely java).
P.s. a long time ago I wrote simple scripts for playing on ahk (I don’t know what language I use), I quickly figured out what was happening with the list of commands.
But with the studio, no way, I built the algorithm, but the writing itself is not given in any way.
Upd: maybe I'm looking in the wrong direction

Answer 1

If I understand you correctly, here

Answer 2

Here's what you need
Well, here it is - https://www.humblebundle.com/books

Answer 3

Thank you for your help, perhaps it is worth pulling up English).