AndroidX release notes

We are rolling out a new package structure to make it clearer which packages are bundled with the Android operating system, and which are packaged with your app's APK. Going forward, the android.* package hierarchy will be reserved for Android packages that ship with the operating system; other packages will be issued in the new androidx.* package hiearchy.

Existing packages are being refactored to use the new hierarchy. Historical artifacts—those versioned 27 and earlier, and packaged as*—will remain available on Google Maven; however, all new development will occur in the new androidx.*-packaged artifacts versioned starting from 1.0.0.

For a full mapping of all the old classes and build artifacts to the new ones, see the AndroidX refactoring page. For more information about the AndroidX refactor, see the blog post.

Versioning changes

The new artifacts will follow Semantic Versioning, and will update independently, instead of all at once. Following this restructuring, it will be possible to update AndroidX libraries in your project independently. This avoids the problem of updating many Support Library modules in your project from e.g. 26.1.0 to 27.0.0 all at once.

New Project

If you create a new project using the androidx-packaged dependencies (as opposed to refactoring an existing project with the Android Studio tool), your new project needs to target API level 28, and you will need to add the following lines to your file:


Architecture Components

For information about architecture components, see the Architecture components release notes.

1.0.0 alpha 2

(May 25, 2018)

Bugfix release.

Fixed issues

1.0.0 alpha 1

(May 8, 2018)

Initial alpha release. The package names are subject to change during the alpha period.

Known issues

  • The following libraries are not yet compatible with the AndroidX refactor:
    • Requires 1.25.4 or later
  • Upgrade to version 2.16 or later` to be compatible with the AndroidX refactor.
  • The Android Studio refactor tool incorrectly refactors some classes from the* and* namespaces.
    Workaround: Check and correct your import lines after running the refactor tool.
  • After using Android Studio refactor tool, full package name is used for some classes in code even though the package was imported.

Fixed issues

  • BottomNavigationView menu is not initialized correctly (AOSP issue 63375220)
  • RecyclerView getItemDecorationAt has incorrect documentation (AOSP issue 72727717)