May 27th, 2016: For information on what's new in 2.2 Preview 2, see the canary release announcement. For additional information about Android Studio, see the main developer site.
Due to a bug, we do not have patches from Preview 1 to Preview 2, so you will need to download a complete install of the IDE. The relevant patching bug is fixed in this build, so we should be able to patch from Preview 2 to Preview 3 next time. You may have noticed the larger download sizes than previous versions of Android Studio; this is because we now bundle a build of OpenJDK with the IDE to address various font rendering and stability issues.
Windows: https://dl.google.com/dl/android/studio/ide-zips/188.8.131.52/android-studio-ide-145.2915834-windows.zip (434 MB)
Mac: https://dl.google.com/dl/android/studio/ide-zips/184.108.40.206/android-studio-ide-145.2915834-mac.zip (434 MB)
Linux: https://dl.google.com/dl/android/studio/ide-zips/220.127.116.11/android-studio-ide-145.2915834-linux.zip (434 MB)