We don’t know what the next Android version name is yet, but Android O’s Developer Preview 4 is rolled out by Google. It is a release candidate build with the recent bug fixes. While the update does not add any new features to the Android O’s last release, it contains bug fixes and stability improvements.
It could possibly be the final preview before the stable launch of Android 8 which is held later this year. Currently, the OTA to update to Android O Developer Preview 4 works on almost all Google branded hardware including Google Pixel, Google Pixel XL, Nexus 6P, Nexus 5X, Pixel C and Nexus Player. Also, interested users and developers can get an emulator to run on their PCs or Macs.
Now that the 4th preview is out, don’t expect Google to add any more important new features, the work on Android 8 from now on will cover the latest bug fixes, final system behaviors and the final APIs which can help developers to test their apps. Hence they will be all set when stable Android 8.0 version goes down.
Moreover, developers can utilize new Android O features like notification channels and dots, shortcut pinning, picture-in-picture, auto fill, adaptive icons, downloadable fonts in order to boost the engagement within apps and optimize them for battery usage.
The stable build of Android 8.0 is expected to release with the launch of the next generation of Pixel devices. In the meanwhile, Google will announce the name of this Android version, don’t expect it to be Oreo though.