Flutter & Firebase Masterclass - Documentation

Android build.gradle issues

Starting with Flutter 2.8, the compileSdkVersion, minSdkVersion and targetSdkVersion are no longer hardcoded.

Instead, they are set like this inside android/app/build.gradle:

android {
    compileSdkVersion flutter.compileSdkVersion

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.ecommerce_app"
        minSdkVersion flutter.minSdkVersion
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }
    ...
}

All these variables are set like this inside android/local.properties (note that this file is git ignored by default):

sdk.dir=/Users/andrea/Library/Android/sdk
flutter.sdk=/Users/andrea/fvm/versions/stable
flutter.buildMode=debug
flutter.versionName=1.0.0
flutter.versionCode=1

Note that the build may fail if these variables are not added:

flutter.minSdkVersion=21
flutter.targetSdkVersion=30
flutter.compileSdkVersion=30

There's an open issue regarding this here:

For more info about building on Android, see the official docs: