Cannot use local .aar file inside library module

Question

I have a socialauth-androidaar library added to my project. I put it in a directory as described here and it works great. Now I will translate part of my code into a library module named to reuse it in another project. will be fully used by the library module, so I moved it to overwriting my files . From now on, I cannot create my project because the following error occurs:flatDir
commonssocialauth-androidproject/commons/libs/build.gradle

Error:A problem occurred configuring project ':ScrollApplication'.
> Could not resolve all dependencies for configuration ':ScrollApplication:_developmentDebugCompile'.
   > Could not find :socialauth-android:.
     Searched in the following locations:
         http://dl.bintray.com/populov/maven//socialauth-android//socialauth-android-.pom
         http://dl.bintray.com/populov/maven//socialauth-android//socialauth-android-.aar
         https://oss.sonatype.org/content/repositories/snapshots//socialauth-android//socialauth-android-.pom
         https://oss.sonatype.org/content/repositories/snapshots//socialauth-android//socialauth-android-.aar
         https://repo1.maven.org/maven2//socialauth-android//socialauth-android-3.2.pom
         https://repo1.maven.org/maven2//socialauth-android//socialauth-android-3.2.aar
         file:/home/artem/Workspace/scrollandroid/libraries/socialauth-android-3.2.aar
         file:/home/artem/Workspace/scrollandroid/libraries/socialauth-android.aar
     Required by:
         scrollandroid:ScrollApplication:unspecified > scrollandroid:commons:unspecified

, socialauth-android.aar project/libraries, , . project/commons/build.gradle , flatDir commons project/commons/libs! , jar, project/commons/libs/, - .

?

build.gradle( , , , ):

project/settings.gradle:

include ':ScrollApplication', ':commons'

project/build.gradle:

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.0.0-rc1'
    }
}

project/commons/build.gradle:

apply plugin: 'com.android.library'

repositories {
    maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' }
    mavenCentral()

    flatDir {
        dirs "libs"
    }
}

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.1"

    defaultConfig {
        minSdkVersion 14
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }

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

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])

    compile(name:'socialauth-android', ext:'aar')
}

project/app/build.gradle:

apply plugin: 'com.android.application'

repositories {
    maven { url "http://dl.bintray.com/populov/maven" }
    maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' }

    mavenCentral()

    flatDir {
        dirs "../libraries"
    }
}

configurations {
    apt
}

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.1"

    defaultConfig {
        minSdkVersion 14
        targetSdkVersion 21
    }

    lintOptions {
        abortOnError false
    }
}

dependencies {
    compile project(':commons')

    compile fileTree(dir: '../libraries', include: ['*.jar'])
}

: ​​

├── build.gradle
├── commons
│   ├── build.gradle
│   ├── libs
│   ├── proguard-rules.pro
│   └── src
│       ├── androidTest
│       │   └── java
│       └── main
│           ├── AndroidManifest.xml
│           ├── assets
│           ├── java
│           └── res
├── gradle
│   └── wrapper
├── libraries
│   ├── aws-android-sdk-1.7.1.1-core.jar
│   ├── aws-android-sdk-1.7.1.1-s3.jar
│   ├── libGoogleAnalyticsServices.jar
│   └── supertooltips-3.0.1.aar
├── scrollandroid-hg.iml
├── ScrollApplication
│   ├── build.gradle
│   ├── proguard.cfg
│   ├── ScrollApplication.iml
│   └── src
│       └── main
│           ├── AndroidManifest.xml
│           ├── assets
│           ├── java
│           └── res
├── settings.gradle
└── stacktrace.txt

Answer 1

, commons ( ?), . Gradle (, ), , commons socialauth-android.

​​ "flatDir" "project/app/build.gradle"

flatDir {
    dirs "../libraries", "../commons/libs"
}

Answer 2

, , . .aar :

.aar Gradle " flatDirs "

.aar, Gradle, .aar .

.aar Maven, POM undefined. , Dependency Substitution Gradle .