Google I/O introduced a new IDE that can fulfill all the need of android app developers which they want in their ideal IDE. It's called "Android Studio", it's free for all.

Most powerful features of Android studio are :

1. Extensible Build Tools

Based on gradle, Android Studio makes use of a new build system. It provides customized flavors, flexibility, dependency resolution and many others. It provides facility to develop your projects in IDE and also on your continuous integrations servers. This combination can help you t easily manage complex build configurations natively, all over your workflow, in all of your tools.

2. Rich and Smooth GUI

Past year, there was a drag and drop feature was added to ADT but now all these are added in Android Studio. Android studio provides feature to preview your layouts on various device form factors, platform versions and locales.

3. Powerful code editing

Another powerful feature of Android studio is its code editor which is base on IDEA editor. It offers deep static code analysis, smart editing and advanced code refactoring.

Inline resource lookups which is one of the Smart editing features help you to read your code easily, while giving you quick access to edit code the backing resources. Advanced code refactoring feature provides you the facility to transform your code in all over scope of the entire project, securely and rapidly.

4. Access of Google services using IDE(Android Studio)

Android studio makes it very easy to use the Google services. From now, you can use Google's services right from your IDE "Android Studio". To start, Google made it easy to add services directly from IDE such a cloud-based backend with integrated Google Cloud Messaging (GCM) to your app.

A new plug-in called "ADT Translation Manager Plugin" added by Google to help you with localizing your applications. You can this plugin for exporting you string to Google Play Developer Console for translation, then download and import your translations back into the project.