java.lang.NullPointerException: Project directory not specified

Question

When building a project in Android Studio (build AI-130.729444), I keep getting this exception:

java.lang.NullPointerException: Project directory not specified: Project directory not specified

It starts happening out of nowhere, and editing the gradle files does not help.

Answer 1

You may have only a partially checked-in project. In particular, if you have no .idea/gradle.xml file, this error will occur.