firebase-analytics

# Firebase Analytics Skill This skill defines how to correctly implement Firebase Analytics in Flutter applications, covering setup, event logging, user properties, and data collection best practices. ## When to Use Use this skill when: * Setting up and configuring Firebase Analytics in a Flutter project. * Logging predefined or custom analytics events. * Setting user properties or default event parameters. * Implementing screen view tracking with GoRouter or Navigator observers. * Building conversion funnels or tracking user flows. --- ## 1. Setup and Configuration ``` flutter pub add firebase_analytics flutter run ``` ```dart import 'package:firebase_analytics/firebase_analytics.dart'; // After Firebase.initializeApp(): FirebaseAnalytics analytics = FirebaseAnalytics.instance; ``` - Initialize Firebase before using any Firebase Analytics features. - Analytics **automatically logs** some events and user properties — no additional code needed for those. - On iOS, if your app does not use the IDFA (Advertising Identifier), use the IDFA-free Analytics dependency (`FirebaseAnalyticsCore` under Swift Package Manager, or `FirebaseAnalytics/Core` under CocoaPods) instead of the default `FirebaseAnalytics` dependency to avoid App Store review questions about advertising identifiers: - **Swift Package Manager:** set `FIREBASE_ANALYTICS_WITHOUT_ADID=true` when building (`FIREBASE_ANALYTICS_WITHOUT_ADID=true flutter build ios`). ### Add Navigator Observer for Automatic Scr...