Times have changed since Eclipse was the IDE of choice for developing Android apps. Now, the official IDE is Android Studio, which is built on the incredibly successful IntelliJ, which is developed by JetBrains.
The focus on the 2.0 release is speed, and particularly deployment speed. A full build of an Android app is now 2X to 2.5X faster than in previous versions, and even better, a new feature named “Instant Run” has been introduced. With Instant Run, developers can build and deploy an app once, and every time they have made changes to it, the app can be refreshed within a second or two. This is comparable with how many HTML editors render the results as developers write the markup and styling rules. New and much faster emulators have also found their way to the IDE, along with some interface changes.
Google has previously announced that it would drop its support for Eclipse at the end of 2015, and as this is getting closer, Google is ensuring that Android Studio is as good and attractive as ever.