Can\'t find the source code of new Android Architecture Components. Was it published? If it was, where?
If the source is in AOSP, please specify which specific repo proj
Edit: Android Code Search
There is a very handy official online code search platform for Android: https://cs.android.com/
Try it, you'll love it!
Original Answer
As stated in Android team's official blog AndroidX Development is Now Even Better, the source code of AndroidX (previously support) lies in https://android.googlesource.com/platform/frameworks/support/+/androidx-master-dev. You can see AOSP AndroidX Contribution Guide on the page. There are details about:
All you need to do is following the instructions step by step, it won't take long to setup.
The other two useful links are:
It is also worth to be mentioned that in Android Fireside Chat (Android Dev Summit '18), the Android team are considering moving the source code of AndroidX to GitHub. We'll see whether it would happen in the future.