Android Gradle build and circular dependency

Question

I have an Android project in IntelliJ IDEA. It consists of two modules: app and library. App depends on library and library depends on app (Yes, it's not good, but I have what I have and can't change this). IDEA in project settings warn me about circular dependencies, but project builds correctly. Project structure looks like this:

project
|__app
|    |__src
|    |__build.gradle
|__libarary
|    |__src
|    |__build.gradle
|__build.gradle
|__settings.gradle

Now I'm trying to migrate to new Android build system based on Gradle and have a trouble here. In my build.gradle from app module I add dependency on library

compile project(":library")

Also I tryed to add dependency in library on app like

compile project(":app")

But gets error from build system, when gradle trys to assemble library module:

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':app'.
> Failed to notify project evaluation listener.
   > Module version project:app:unspecified depends on libraries but is not a library itself

What I can do with this without changing project structure

@mariosangiorgio, unfortunately nope, I changed my project structure — Dmitriy Tarasov, Jan 14 '14 at 08:36
You would need to factor out the code both your app and your library need to use, if at all possible — Leo supports Monica Cellio, Mar 26 '15 at 17:03

score 1 · Answer 1 · answered Aug 01 '14 at 22:14

1

This parameters have changed.

You should now refactor:

In the library project use:

apply plugin: 'com.android.library'

In the app project use:

apply plugin: 'com.android.application'

answered Aug 01 '14 at 22:14

Lucas

43
6

score 0 · Answer 2 · answered Aug 03 '13 at 11:30

0

In the library project use:

apply plugin: 'android-library'

In the app project use:

apply plugin: 'android'

Make sure you have the newest Android tools:

classpath 'com.android.tools.build:gradle:0.5.+'

answered Aug 03 '13 at 11:30

Jan Weitz

444
4
11

score 0 · Answer 3 · answered May 25 '17 at 08:45

If you arrive here searching for the same error with Android 3.0 you should know the current workaround is:

downgrade to kotlinVersion = '1.1.2-2'

and disable incremental build in gradle.properties kotlin.incremental=false

The issue is planned for the next alpha https://issuetracker.google.com/issues/38447344

Android Gradle build and circular dependency

3 Answers3