Android Studio 2.0 and Emulator 25.1.1 are moved to stable release channels.
This release is focused on development productivity by introducing instant run and a much faster emulator. Please see our blog post for more details.
announcement: Android Tools Project Site - Android Studio 2.0 and Emulator 25.1.1 are Available in the Stable, Beta, and Dev Channels
Upgrade to Android Studio 2.0 from 1.5: