[soulchild37]

If you know Java already, learning Android shouldn't be too difficult, mostly just need to learn the lifecycle of activity (the view / UI) and some Android SDK stuff

[on_and_off]

the hardest part is to learn "modern android" and not to be bogged down by all the old ways to do things that you can find on the web.

e.g. lifecycles, we now have good tools to wrap them and don't really have to care about them.

The official doc is a good starting point.