As of 2015, I see that Android studio is an official IDE for developing android applications according to information on their official site and on each page of their site, there is a note suggesting to go for Android studio rather than Eclipse with ADT.
Note: If you have been using Eclipse with ADT, be aware that Android Studio is now the official IDE for Android, so you should migrate to Android Studio to receive all the latest IDE updates.
But I haven't found any latest article about the pros and cons in choosing the IDE or eclipse with ADT. If some one can throw some light on it then it would help other beginners like me in choosing the right app for android development