Install and initialize Firebase SDK in Flutter Android and IOS

Install firebase_core and add the initialization code to your app if you haven’t already.

Install firebase cli (firebase_core)

https://firebase.google.com/docs/cli#setup_update_cli

Check firebase cli installed correctly

firebase -V

Login to firebase

firebase login

you will see this message Success! Already logged in as example@gmail.com if already logged in.

if not loggedin then it will ask collect CLI and Emulator Suite usage and error reporting information? the choice is yours you can type y/n and click. enter.

It opens the browser and ask to login in to firebase google account.

once loggedin ✔ Success! Logged in as example@gmail.com

If you see different account was loggedin

firebase logout

once firebase login was done please activate the Firebase CLI for your project

Activate Firebase CLI

dart pub global activate flutterfire_cli

you will see this message Activated flutterfire_cli Version.

Configure your apps to use Firebase

Install firebase core to flutter

flutter pub add firebase_core

flutterfire configure

create or select firebase project

select platforms

In code base

In your lib/main.dart file

import 'package:firebase_core/firebase_core.dart';
import 'firebase_options.dart';

Also in your lib/main.dart file, initialize Firebase using the DefaultFirebaseOptions object exported by the configuration file:

WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp(
  options: DefaultFirebaseOptions.currentPlatform,
);
runApp(const MyApp());

Firebase setup completed

Once installed you can do

you can Install firebase Google analytics to flutter

Install firebase analytics in Flutter Android and IOS