SDK for android, where can I find a reference with examples?

Question

Java

Good afternoon!
The question, I'm sure, is simple, but it looks like they banned me in Google, I can't find it anywhere. I am learning java for android, there is a ton of learning materials, but I can’t even find the SDK documentation, where everything is written point by point what is what and how it works. Ideally in Russian, version from the 4th norm

Answer 1

developer.android.com/intl/ru/develop/index.html