Firebase Setup Guide for Flutter

Follow these steps to integrate Firebase with your Flutter project.

Note: Create a new Firebase project, copy the Application ID from the app-level build.gradle file, and use it in your Firebase configuration. After downloading the google-services.json file, move it to the android/app/ folder.

Step 1: Configure Firebase in main.dart

Add the following code to initialize Firebase in your main.dart file:

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

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  
  await Firebase.initializeApp(
    options: Platform.isAndroid
      ? const FirebaseOptions(
          apiKey: 'YOUR_API_KEY',
          appId: 'YOUR_APP_ID',
          messagingSenderId: 'YOUR_MESSAGING_SENDER_ID',
          projectId: 'YOUR_PROJECT_ID',
        )
      : null,
  );

  runApp(MyApp());
}

Replace 'YOUR_API_KEY', 'YOUR_APP_ID', 'YOUR_MESSAGING_SENDER_ID', and 'YOUR_PROJECT_ID' with the values from your Firebase project settings.

Step 2: Add Firebase Plugin to Project-Level build.gradle

Add the Firebase plugin to the top of your project-level build.gradle file:

plugins {
    id 'com.google.gms.google-services' version '4.4.2' apply false
}

Step 3: Add Firebase Plugin and Dependencies to App-Level build.gradle

In your app-level build.gradle file, add the Firebase plugin inside the plugins block. Also, add the Firebase BoM (Bill of Materials) dependency at the bottom of the dependencies section:

plugins {
    id 'com.google.gms.google-services'
}

dependencies {
    // Import the Firebase BoM
    implementation platform('com.google.firebase:firebase-bom:33.5.1')
    
    // Add other Firebase dependencies as needed, for example:
    // implementation 'com.google.firebase:firebase-analytics'
}

Note: The Firebase BoM ensures that all Firebase libraries used in your app are compatible with each other.