LibGDX ClassNotFound on Android

Question

I'm using libGDX for my game which shares some code with another project. I put this code in a .jar library which I have added in the root build.gradle.

Everything works fine on desktop, but when I launch the game on Android it crashes with a ClassNotFound exception. It can't find a class of my the library.

Can anyone help me out? I have no idea what is causing the problem.

Edit: changes to build.gradle:

project(":core") {
    apply plugin: "java"


    dependencies {
        compile "com.badlogicgames.gdx:gdx:$gdxVersion"
        compile "com.badlogicgames.gdx:gdx-freetype:$gdxVersion"
        compile fileTree(dir: '../libs', include: '*.jar')
    }
}

Answer 1

You need to add the same fileTree dependency directly in the android module because the Android Gradle plugin currently can't handle transitive flat file dependencies.

project(":core") {
   ...
   compile fileTree(dir: '../libs', include: '*.jar')
   ...
}

// And also

project(":android") {
   ...
   compile fileTree(dir: '../libs', include: '*.jar')
   ...
}

Source.