Duplicate classes R & BuildConfig after “Reimport All Maven Projects”

Question

We are building our Android projects with Maven and IntelliJ IDEA. Sometimes we must execute \"Reimport All Maven Projects\", e.g. to update dependencies. The problem with t

Answer 1

After IDEA detects and adds Android facet to module, it would start generating gen folder at usual place, but maven-android-plugin generates its own under target directory.

You need to tell IDEA to place generated files at same place where maven-android-plugin creates them.

First, use module's android facet settings and check the option to use Maven goal instead of generating by itself:

Then, go to module's settings and set output path same as Maven's, which is target directory:

Delete gen directories, Do mvn clean to clear all unnecessary files.