This is one of a series of repos hosting experiments I've done trying to build a camera app. While my own camera app is still a work in progress, this repo has been largely abandoned. Never the less, you might be surprised to find yourself interested in this source anyway.
The official Android CameraX basic examples files are really clunky. These are a great improvement. In particular, if you are interested in writing an ImageAnalyzer this repo contains one of the few examples out there showing how to do so.
If you've come this far you're probably already have Android Studio installed. If not, you'll surely need it.
With your AS install open your clone of this repo and click the build button in the toolbar; it has a hammer on it.
I have a Google Pixel 2 solely for the purpose of testing camera app code. An emulator is a very unsatisfying way of testing camera apps.
This particular repo was only abandoned when the experiments started to require code that needed to be kept private.
It has been replaced by lumiCenterTestBed, a private repo, which has in turn been replaced by sensible-detachment which is also private.