Flutter Google Sign In: Step by Step Guide for Beginners | Android & IOS

This step-by-step tutorial will show you how to integrate Google Sign-In into your Flutter app on iOS and Android platforms.

No prior knowledge of Firebase authentication is required; everything will be covered in detail. You'll discover how to configure Google Sign-In, set up Firebase, and create Flutter code to integrate this feature into your app.

I've left in frequent errors you might run across since we want to simplify complicated topics, and we'll troubleshoot them together.

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Resources
1. Firebase CLI: https://firebase.google.com/docs/cli
2. FlutterFire CLI: https://firebase.google.com/docs/flut...
3. Google Sign-In Package: https://pub.dev/packages/google_sign_in
4. SHA COMMAND: https://developers.google.com/android...
5. Project Repo: https://github.com/jeronasiedu/google...

Possible Errors
1. Flutterfire command not found: Make sure you add flutterfire to your environment variables.https://stackoverflow.com/questions/7...

2. Multidesk support: Set your min SDK version to at least 20 in android/build.gradle
3. Make sure to update your cocoa pods if you're on a Mac.

Table of Contents:
00:00 Introduction
00:52 Creating Firebase Project
02:30 Setting up FlutterFire CLI
06:15 Connecting Flutter App with Firebase Project
08:25 Adding SHA Certificate Fingerprints for Android
11:20 Installing dependencies
13:40 Upgrading Google Services dependency
14:45 Increase Min SDK version
16:00 Google Sign In Logic
28:30 Display currently logged in user
33:00 iOS setup
37:00 Conclusion