Android Studio was first announced at Google I/O 2013, and now Google is making one of the last pushes to get developers to move over to the new development environment. According to a post on the Google Developers blog, the company is planning to retire support for Android Developer Tools in Eclipse later this year:
To that end and to focus all of our efforts on making Android Studio better and faster, we are ending development and official support for the Android Developer Tools (ADT) in Eclipse at the end of the year. This specifically includes the Eclipse ADT plugin and Android Ant build system.
Google then goes on to detail how to migrate over to Android Studio if you haven’t yet. Obviously, the first step is to download Android Studio. After this, most developers will be able to easily migrate by importing existing Eclipse ADT projects into Android Studio via the Import Project window (as shown above).