buildscript { ext { kotlin_version = '1.3.72' tools_version = '4.0.1' build_tools_version = '29.0.3' sdk_version = 29 support_version = '25.3.1' } repositories { google() jcenter() } dependencies { classpath "com.android.tools.build:gradle:$tools_version" classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" } } allprojects { repositories { google() jcenter() maven { url 'https://jitpack.io' } } gradle.projectsEvaluated { tasks.withType(JavaCompile) { options.compilerArgs << "-Xlint:unchecked" } } } task clean(type: Delete) { delete rootProject.buildDir }