Can not include source library in project in Intellij IDEA

Question

I've created library project in IDEA with common helpers , which I use in my android applications.

Then I've created android application and included in it my library project like this tutorial said .

Everything seemed okay, code autocomplete worked fine, IDEA recognize that library and all classes and methods in it.

But then I compiled application and saw error " 'org.my.helperlibrary' does not exist ". However as I said IDEA acts like everything okay before making/launching project.

Here is similar question , but answer is trivial, of course my library has checked " Is Library Project " option but I still can not launch my application which use my library.

Updated:

I've just saw an error: " UNEXPECTED TOP-LEVEL EXCEPTION: java.lang.IllegalArgumentException: already added: Lorg/my/helperlibrary/Helper; " when I removed all usages of library in my android application. So it's just included in my app and not used.

Answer 1

It turned out that I should not add dependency manually in that window

I rather should add new module in my Project window at the left

Then I should choose iml file in the root folder of android library project I want to use

Then I pressed finish and from that point I had two modules in my project

After that when using classes I can press Alt+Enter on any class from SampleLibrary and tell IDEA to add module dependency

Then I could see that IDEA made all I need without me. I can now use SampleLibrary from SampleApplication!

Answer 2

Try to select library project, then click Build -> Compile <your library project name> . Then back to you project which use this library and click Build -> Rebuild Project . After that try to run project again.

Hope it helps.