Why do packages from library module does not exist upon compilation, even when Android Studio shows no errors in code?

Question

I have a library module (AndEngine) inside my libs/AndEngine folder. The code from that compiles fine.

In my root settings.gradle file I have this :

include ':app:libs:AndEngine'
include ':app' 

And then in my app's build.gradle file I have this in dependencies:

compile project('libs:AndEngine')

INside my app's code, all of the imports and even autocompletion works without any errors at all. Inside Android Studio, all of the packages are found. But when I go to compile, I get about a hundred of these errors:

error: package org.andengine.entity.primitive does not exist
import org.andengine.entity.primitive.Rectangle;

I am coming from the ADK with eclipse, so I am new to android studio. If anyone has any answers to this problem I would be very appreciative!

Answer 1

Change this line.

compile project('libs:AndEngine')

in

compile project(':app:libs:AndEngine')

In any case it is not a good idea to put a library module inside the app module. I suggest you using this structure:

root
  settings.gradle
  app
    build.gradle
  libs
    AndEngine
      build.gradle

Then in your settings.gradle

include ':libs:AndEngine'
include ':app' 

And in your app/build.gradle

compile project(':libs:AndEngine')