plugins { id 'com.android.library' id 'org.jetbrains.kotlin.android' id 'kotlin-android-extensions' } android { compileSdkVersion rootProject.ext.android["compileSdkVersion"] buildToolsVersion rootProject.ext.android["buildToolsVersion"] defaultConfig { minSdkVersion 19 targetSdkVersion 25 versionCode 1 versionName "1.0" } } dependencies { implementation fileTree(include: ['*.jar'], dir: 'libs') implementation 'androidx.appcompat:appcompat:1.3.0-alpha02'//1.1.0 implementation 'com.google.android.material:material:1.1.0' implementation 'androidx.constraintlayout:constraintlayout:1.1.3' implementation 'com.squareup.retrofit2:converter-gson:2.3.0' }