Can someone provide an up-to-date Android guide for Google Drive REST API v3?

Question

Myself and many others have been struggling with setting up the Google Drive REST API v3 to work with Android apps. This mainly stems from the fact that the official Google

Answer 1

I need that as well. I managed to build something that works though not optimal from these links :

Google guides for REST API v3

Google Github demo project for migration to REST after deprecation of the other method

Documentation for REST API v3

My main remaining problem now is to find a file/folder picker. The one in the demo project uses SAF which does not allow to retrieve the ID of the file you picked (Oo !!!)