android - Gradle sync Error:Configuration with name 'default' not found -

i want add external library guillotinemenu-android in application. followed steps given in upvoted answer existing question how add library project android studio? facing error when try build project after step 6 i.e. when added dependency in app/build.gradle compile project(":guillotinemenu"). tried stackoverflow links related error not working out. have made folder named libs in app directory , copied project folder guillotine menu there. here build.gradle(module:app) file

apply plugin: 'com.android.application'  android {     compilesdkversion 22     buildtoolsversion "22.0.1"     defaultconfig {         applicationid "com.sunshine.bbreaker.appet_i"         minsdkversion 14         targetsdkversion 22         versioncode 1         versionname "1.0"     }     buildtypes {         release {             minifyenabled false             proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'         }     }     productflavors {     } }  dependencies {     compile filetree(dir: 'libs', include: ['*.jar'])     compile 'com.android.support:recyclerview-v7:+'     compile 'com.github.navasmdc:materialdesign:1.+@aar'     compile 'com.android.support:appcompat-v7:22.0.+'      // guillotinemenu     compile project(":guillotinemenu") } 

settings.gradle(project settings) file:

    include ':app', ':guillotinemenu' project(':guillotinemenu').projectdir = new file('libs/guillotinemenu') 

build.gradle(project:guillotinemenu) file:

buildscript { repositories {     jcenter() } dependencies {     classpath 'com.android.tools.build:gradle:1.2.3'      // note: not place application dependencies here; belong     // in individual module build.gradle files }} allprojects { repositories {     jcenter() }} 

settings.gradle(project:guillotinemenu) file:

include ':app', ':library' 

build.gradle(guillotinemenu) file:

    apply plugin: 'com.android.application'  android {     compilesdkversion 22     buildtoolsversion "21.1.2"      defaultconfig {         applicationid "com.yalantis.guillotine.sample"         minsdkversion 15         targetsdkversion 22         versioncode 1         versionname "1.0"     }     buildtypes {         release {             minifyenabled false             proguardfiles getdefaultproguardfile('proguard-android.txt'), 'proguard-rules.pro'         }     } }  dependencies {     compile project(':library')     compile filetree(dir: 'libs', include: ['*.jar'])     compile 'com.android.support:appcompat-v7:22.1.1'     compile 'com.jakewharton:butterknife:6.1.0' } 

let me know if need more information. in advance.

you should have structure this:

projectroot   app      build.gradle   library      build.gradle   build.gradle   settings.gradle 

each module has own build.gradle file. root/settings.gradle defines modules inside project. don't use settings.gradle inside module.

in settings.gradle :

include ':app', ':library' 

in build.gradle

    buildscript {         repositories {             jcenter()         }         dependencies {             classpath 'com.android.tools.build:gradle:1.2.3'              // note: not place application dependencies here; belong             // in individual module build.gradle files         }     }     allprojects {         repositories {             jcenter()         }     } 

in library/build.gradle

apply plugin: 'com.android.library'  android {     compilesdkversion ...     buildtoolsversion ...      defaultconfig {         ....     }  }  dependencies {    //.... } 

in app/build.gradle use file change:

dependencies {     //...     // guillotinemenu     compile project(":library") } 

update:

after comment below, think in case library folder root folder of project. means should refer module inside project.

    projectroot       app          build.gradle       libs          guillotinemenu            build.gradle //top level file of guillotinemenu project     -->>   module                      build.gradle  //build.gradle of module 

so change settings.gradle of projectroot.

 include ':app', ':guillotinemenu'  project(':guillotinemenu').projectdir = new file('libs/guillotinemenu/module') 

the module (libs/guillotinemenu/module) should have build.gradle library/build.gradle described above.