"Extension with name 'android' does not exist" error when adding Kotlin to Android project

Question

When I try to add Kotlin to our Android project using the official Kotlin tutorial, Gradle fails launching the error Extension with name 'android' does not exist.

Answer 1

Android Studio modifies your build.gradle adding apply plugin: 'kotlin-android' above apply plugin: 'com.android.application'. Just move the Kotlin line below the Android one and Gradle will run smoothly. It should look like this example:

apply plugin: 'com.android.application' apply plugin: 'kotlin-android'