Android Studio is new official development tools for android (https://developer.android.com/sdk/installing/studio.html). The latest version is 0.4.6 which is not a stable release.
The IDE can import Eclipse project and convert it to gradle project automatically (https://developer.android.com/sdk/installing/migrate.html).
I haven't tested it yet but it's good to start studying it. If anyone have done it, please let me know. Thank you