Inquiries regards methods to detect and alert safety app users (Android)

Question

Hi guys, I'm currently in preliminary stage for my Final Year Project and thinking of constructing an android application offering children and women an alert system informing nearby user of their location and status on a real-time basis.

However, I'd just started my learning regards Mobile Apps Dev, henceforth seek guidance of what I should learn to accomplish said project

Answer 1

For android app development you can learn java.

https://www.sololearn.com/Course/Java/?ref=app