Cannot get property 'compileSdkVersion' on extra properties extension as it does not exist Open File
In your top-level file use:
ext { compileSdkVersion = 26}In your module/build.gradle file use:
android { compileSdkVersion rootProject.ext.compileSdkVersion ...}
Another way:
Your build.gradle in top-level module
ext { minSdk = 21 targetSdk = 29 compileSdk = 29 buildTools = '29.0.3'}Your build.gradle in app module
android { def buildConfig = rootProject.extensions.getByName("ext") compileSdkVersion buildConfig.compileSdk buildToolsVersion buildConfig.buildTools defaultConfig { minSdkVersion buildConfig.minSdk targetSdkVersion buildConfig.targetSdk } // ...}
In build.gradle you need to write compilesdkversion under android tag as in this example:
android {.. compileSdkVersion 26 // 26 is an example..}
By the way. You can build that module as library then import it into your project as .aar file.