build.gradle

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

buildscript {
    ext.kotlin_version = '1.3.72'
    ext.gradle_android_version = '4.0.0'

    repositories {
        jcenter()
        maven {
            url 'https://maven.google.com'
        }
        google()
    }
    dependencies {
        classpath "com.android.tools.build:gradle:$gradle_android_version"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
        maven {
            url 'https://maven.google.com'
        }
    }
}

// This block encapsulates custom properties and makes them available to all
// modules in the project.
ext {
    // The following are only a few examples of the types of properties you can define.
    compileSdkVersion = 28
    //buildToolsVersion "28.0.3"
    // You can also create properties to specify versions for dependencies.
    // Having consistent versions between modules can avoid conflicts with behavior.
    supportLibVersion = "28.0.0"
    roomLibVersion = "1.1.1"
}