How to debug android library module in Android Studio?

Question

I have an Android Studio project which contains a library module, which is added as another gradle project to it. I would like to debug the library code and set breakpoints on it.

What gradle settings should I use, if I want to debug a library module while running the app on emulator or real device ?

---

Update 1

this is the settings.gradle file :

include ':app'
include':my-library'

Answer 1

I set both library module Debug and Release build type to debuggable

buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        debuggable true
        jniDebuggable true
    }
    debug {
        debuggable true
        jniDebuggable true
        minifyEnabled false
    }
}

Answer 2

I'm using this setup to debug my libraries:

|- myApplication
|  |- settigs.gradle
|  |- build.gradle
|     ...
|- myLibrary
   |- build.gradle
      ...

add to settings.gradle:

include ':myLibrary'
project(':myLibrary').projectDir = new File(settingsDir, '../myLibrary')

add to build.gradle (of your app)

compile project(':myLibrary')

Your library gets simply included and you can debug and set breakpoints just like in the app.