Android Studio lets you create apps for Android. Here's how you can install it in Ubuntu 14.04.
1. Open a terminal window.
2. Type in the following commands then hit Enter after each.
sudo apt-add-repository ppa:paolorotolo/android-studio
sudo apt-get update
sudo apt-get install android-studio
According to Noobs Lab:
On top of the capabilities you expect from IntelliJ, Android Studio offers:
Gradle-based build support.
Android-specific refactoring and quick fixes.
Lint tools to catch performance, usability, version compatibility and other problems.
ProGuard and app-signing capabilities.
Template-based wizards to create common Android designs and components.
A rich layout editor that allows you to drag-and-drop UI components, preview layouts on multiple screen configurations, and much more.
Built-in support for Google Cloud Platform, making it easy to integrate Google Cloud Messaging and App Engine as server-side components.More at Noobs Lab
Additional resources for Android Studio