What is the current Road Map for android developer?

Question

Java

How are things today with java/kotlin? Do I need to learn java today before kotlin or can I already start with kotlin?
And anyway, what stack of books and resources (courses are not very welcome)?
Straight everything everything everything that really helps, time in bulk)

Answer 1

1. https://habr.com/ru/company/otus/blog/463019/
2. https://github.com/mobile-roadmap/android-develope...
3. Is there a "roadmap" for android developer applications?
4. https://github.com/MindorksOpenSource/android-deve...