apply plugin: 'com.android.library' apply plugin: 'kotlin-android' apply plugin: 'kotlin-android-extensions' android { compileSdkVersion 28 buildToolsVersion '26.0.2' defaultConfig { minSdkVersion 19 targetSdkVersion 28 versionCode 1 versionName "1.0" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' } } } dependencies { implementation fileTree(dir: 'libs', include: ['*.jar']) api "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" api "com.android.support:appcompat-v7:28.0.0" api 'com.android.support.constraint:constraint-layout:1.1.3' }