build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext.versions = [
            'COMPILE_SDK'    : 26,
            'MIN_SDK'        : 14,
            'TARGET_SDK'     : 26,
            'SUPPORT_LIB'    : '26.1.0',
            'OKHTTP'         : '3.9.0'
    ]

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

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