build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
apply from: "config.gradle"

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        jcenter()
        mavenCentral() // add repository
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.3'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'org.greenrobot:greendao-gradle-plugin:3.2.2' // add plugin
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.0'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven {
            url 'http://maven.aliyun.com/nexus/content/repositories/releases/'
        }
        maven { url 'https://jitpack.io' }
    }

    tasks.withType(Javadoc) {
        options {
            encoding "UTF-8"
            charSet 'UTF-8'
            links "http://docs.oracle.com/javase/7/docs/api"
        }
    }

}

task clean(type: Delete) {
    delete rootProject.buildDir
}