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Adding Firebase to your Flutter App



Introduction

Firebase is a Backend-as-a-Service — BaaS — that started as a YC11 startup and grew up into a next-generation app-development platform on Google Cloud Platform.

Firebase frees developers to focus on crafting fantastic user experiences. You don’t need to manage servers. You don’t need to write APIs. Firebase is your server, your API and your datastore, all written so generically that you can modify it to suit most needs. Yeah, you’ll occasionally need to use other bits of the Google Cloud for your advanced applications. Firebase can’t be everything to everybody. But it gets pretty close.

Top Features of Firebase

  • Build apps fast, without managing infrastructure
    Firebase gives you functionality like analytics, databases, messaging and crash reporting so you can move quickly and focus on your users.
  • Backed by Google, trusted by top apps
    Firebase is built on Google infrastructure and scales automatically, for even the largest apps.
  • One platform, with products that work better together
    Firebase products work great individually but share data and insights, so they work even better together.

What you’ll build?

In this tutorial, you’ll build a mobile app featuring Firebase integration using the Flutter SDK. Your app will:

  • Have fully setup Firebase
  • Ready to work with Auth & Databases
  • Have endpoints for Admob & Analytics

This tutorial focuses on adding Firebase to a Flutter app. Non-relevant concepts and code blocks are glossed over and are provided for you to simply copy and paste.

Github | @ShivamGoyal1899


Setting up Flutter on your machine

The detailed steps to install Flutter on your personal computer & getting started with Flutter is available at the following blog


Create a Firebase project

After setting up & creating a simple Flutter app, navigate to Firebase Official website here:

  • Click on Get started.


Click on Get started
  • Create a new project by tapping on the Add project box.


  • Enter the Project name & select Analytics location.
    Analytics location
    represents the country/region of your organization and sets the currency for revenue reporting.


  • Tap on Create project. Following this, Firebase will set up a new project for you. This will take just a minute.




  • After the project is created successfully, Firebase will show a prompt saying Your new project is ready. Click on Continue to complete the flow.
  • After the project is created successfully, Firebase will show a prompt saying Your new project is ready. Click on Continue to complete the flow.



Configure your app to use Firebase

Configure an Android app

  • In the Add an app to get started section, click on Android Icon to add an Android app to Firebase.


  • On the next screen, enter your Android package name & App nickname and click on Register App. Your package name is generally the applicationId in your app-level build.gradle file. If specified, the app nickname will be used throughout the Firebase console to represent this app. Nicknames aren’t visible to users.


  • Download the google-services.json file & place it in your project’s app root directory. Make sure the config file is not appended with additional characters, like (2).


  • The Google services plugin for Gradle loads the google-services.json file you just downloaded. Modify your build.gradle files to use the plugin.
Project-level build.gradle (<project>/build.gradle):
buildscript {
dependencies {
// Add this line
    classpath 'com.google.gms:google-services:4.2.0'
  }
}
App-level build.gradle (<project>/<app-module>/build.gradle):
dependencies {
// Add this line
  implementation 'com.google.firebase:firebase-core:17.0.0'
}
...
// Add to the bottom of the file
apply plugin: 'com.google.gms.google-services'
  • Back in the Firebase console-setup workflow, click Next to skip the remaining steps.
  • Run flutter packages get.

Configure an iOS app

  • In the Add an app to get started section, click on iOS Icon to add an iOS app to Firebase.


  • On the next screen, enter your iOS bundle ID & App nickname and click on Register App. You can find your Bundle Identifier in the General tab for your app’s primary target in Xcode. If specified, the app nickname will be used throughout the Firebase console to represent this app. Nicknames aren’t visible to users.


  • Download the GoogleService-Info.plist file & move the GoogleService-Info.plist file you just downloaded into the root of your Xcode project and add it to all targets. Make sure the config file is not appended with additional characters, like (2).


  • Back in the Firebase console-setup workflow, click Next to skip the remaining steps.
  • Run flutter packages get.

Add FlutterFire plugins 🔥

Flutter uses plugins to provide access to a wide range of platform-specific services, such as Firebase APIs. Plugins include platform-specific code to access services and APIs on each platform.

Firebase is accessed through a number of different libraries, one for each Firebase product (for example, database, authentication, analytics, or storage). Flutter provides a set of Firebase plugins, which is collectively called FlutterFire.

Since Flutter is a multi-platform SDK, each FlutterFire plugin is applicable for both iOS and Android. So, if you add any FlutterFire plugin to your Flutter app, it will be used by both the iOS and Android versions of your Firebase app.

Available FlutterFire plugins

  • cloud_firestore
  • cloud_functions
  • firebase_admob
  • firebase_analytics
  • firebase_auth
  • firebase_core
  • firebase_crashlytics
  • firebase_database
  • firebase_dynamin_links
  • firebase_messaging
  • firebase_ml_vision
  • firebase_performance
  • firebase_remote_config
  • firebase_storage

Steps to add FlutterFire plugins to your app

  • From the root directory of your Flutter app, open your pubspec.yaml file.
  • Add the FlutterFire plugin for the Firebase Core SDK. All Flutter apps, both iOS and Android versions, require the firebase_core plugin.
dependencies:
flutter:
sdk: flutter
firebase_core: ^0.2.5  # add dependency for Firebase Core

Running the application

  • Connect your Emulator or physical Android device to test the application.
  • Click on Build & Run.
  • And Boooom 🧨, you’re all set! Your Flutter app is registered and configured to use Firebase.





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