What is the difference between IntelliJ Idea and Android Studio?

The biggest difference is that Android Studio will be entirely centered on Android and the Gradle build system, and will require the users to use Gradle to build their projects. Android Studio also provides a number of features to simplify environment setup, such as a bundled and automatically configured Android SDK. IntelliJ IDEA, on the other hand, continues to fully support a broader range of project types and multiple build systems, including Gradle, Maven, Ant and the built-in IntelliJ IDEA build system