I am using the BottomSheet library to create the BottomSheet menu as explained in Google documentation.
I added the BottomSheet library to my project but when I sync with gradle then I am getting error message. I tried all the answers listed at Error: Configuration with name 'default' not found in Android Studio and other solutions listed on stackoverflow but the issue still persists.
Here are build.gradle and settings files of my project:
BottomSheet/build.gradle
buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.2.3'
    }
}
allprojects {
    group = POM_GROUP_ID
    version = POM_VERSION
    repositories {
        jcenter()
      }
    tasks.withType(JavaCompile) {
        options.encoding = "UTF-8"
    }
}
task wrapper(type: Wrapper) {
    gradleVersion = '1.12'
}
app/build.gradle
apply plugin: 'com.android.application'
android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"
    defaultConfig {
        applicationId "com.example.khsingh.stockysingh"
        minSdkVersion 15
        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 'com.android.support:appcompat-v7:22.0.0'
    compile "com.android.support:appcompat-v7:21.0.+"
    compile project(":BottomSheet")
}
root/build.gradle
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.1.0'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}
allprojects {
    repositories {
        jcenter()
    }
}
settings.gradle
include ':app', ':BottomSheet'
project(':BottomSheet').projectDir = new File('library/BottomSheet')
 
     
     
    