Error: Unfortunately you can't have non-Gradle Java modules and > Android-Gradle modules in one project

Question

I have an IntelliJ 14.1.2 Project consisting of two modules - one is an Android Gradle based module and the other is a Spring Java-based module with Maven.

gps-track

Answer 1

1- close the project

2- close Android Studio IDE

3- delete the .idea directory

4- delete all .iml files

5- open Android Studio IDE and import the project

Answer from here