# AndroidX (formerly known as Android Support) libraries have moved `frameworks/support` is no longer part of the platform checkout. Android platform now uses prebuilts of AndroidX for everything. AndroidX is being developed as an unbundled project. # Next steps - For source-code for your IDE, please use `*-sources.jar`s in `prebuilts/sdk/current/androidx` - To contribute, check out AOSP AndroidX repository ([guide here](https://android.googlesource.com/platform/frameworks/support/+/androidx-master-dev/README.md)). - `repo init -u https://android.googlesource.com/platform/manifest -b androidx-master-dev` - For secret platform work, you can use internal `ub-supportlib-master` repo. - `repo init -u persistent-https://googleplex-android.git.corp.google.com/platform/manifest -b ub-supportlib-master`