REACT NATIVE Cannot get property 'compileSdkVersion' on extra properties extension as it does not exist

Question

I'm getting this error in React Native. This question says to put

ext {
compileSdkVersion = 26

}

in the 'top level file'. What is the 'top level file' for this in React Native?

module/build.gradle already has

android { compileSdkVersion rootProject.ext.compileSdkVersion...

Answer 1

React Native android has two build.gradle files

// android/build.gradle
ext {
    buildToolsVersion = "26.0.3"
    minSdkVersion = 16
    compileSdkVersion = 26
    targetSdkVersion = 26
    supportLibVersion = "26.1.0"
}

//android/app/build.gradle
android {
   compileSdkVersion rootProject.ext.compileSdkVersion
}