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Flutter + Firebase

Firebase is the auth and database backend for my Flutter apps. The modern path is flutterfire configure — the old tutorial flow is outdated, and the official flutter.dev docs match the current process. Auth and Firestore patterns, plus the Spring Boot side when the backend is Java.

CLI setup

npm install -g firebase-tools
firebase login
flutter pub global activate flutterfire_cli
flutterfire configure          # links the Flutter project to a Firebase project
flutter pub add firebase_core
flutter pub add firebase_firestore   # for Firestore database

CocoaPods pitfall (iOS)

If pod install fails with "Firebase/CoreOnly requires a higher minimum iOS deployment version":

sudo gem uninstall cocoapods
brew install cocoapods
brew link --overwrite cocoapods

and in ios/Podfile, uncomment the platform line and set it to '13.0'.

Auth + Firestore patterns

  • Future for one-time reads (single document), Stream for real-time listeners — see Flutter Setup.
  • Keep Firebase calls behind a service/provider, not inside widgets.

Spring Boot backend + Firebase Auth

If the API side is Spring Boot, verify Firebase ID tokens server-side with the Firebase Admin SDK — full walkthrough in Spring + Firebase Auth and the original post.

See also