Что нужно знать разработчику андроид приложений(игр)?

Question

какие языки нужно знать разработчику андроид приложений и игр и какое для этого нужно железо ? Какие возможно тонкости или особенности данной работы?

Answer 1

Нужно знать Java, Kotlin и скачать программу Android Studio.

Answer 2

You need to know Java and XML.
Hardware doesn't matter, I think. In Android Studio you can simulate phone or tablet with Android OS to check your program. But it would be better to have a real Android device to test programs/games on it.
You are going to develop programs for devices with different display size. You have to consider horizontal and vertical elements location, because phone can be rotated. Also you have to think about compatibility of different Android OS versions.