Flutter Login Page With Firebase

Log in here

Greetings! In this blog post, I will be discussing the steps to create a Flutter login page using Firebase. As a developer passionate about using Flutter and Firebase, I am thrilled to walk you through the procedure of constructing a login page that seamlessly incorporates Firebase for authentication.

Why Flutter and Firebase?

Flutter is a powerful and cross-platform framework for building beautiful and high-performance mobile applications. It allows you to write code once and deploy it on both iOS and Android platforms. Firebase, on the other hand, provides a comprehensive set of backend services that make it easy to build, manage, and grow your app.

Combining Flutter with Firebase gives you the best of both worlds – a robust and responsive frontend user interface built with Flutter and a flexible and scalable backend powered by Firebase.

Getting Started

First, make sure you have Flutter and Dart installed on your machine. You can download them from the official Flutter website. Once installed, create a new Flutter project:

flutter create my_login_app

Next, navigate to the project directory:

cd my_login_app

Now, let’s add the Firebase dependencies to our project. Open the pubspec.yaml file in your Flutter project and add the following lines:

firebase_core: ^1.0.0
firebase_auth: ^1.0.0

Save the file and run the command flutter pub get to download the dependencies.

Setting Up Firebase Authentication

Before we can start working on the login page, we need to set up Firebase Authentication for our app.

First, create a new Firebase project in the Firebase console. Once created, add an Android app and an iOS app to your project, following the on-screen instructions.

Next, download the google-services.json file for Android and the GoogleService-Info.plist file for iOS. Place these files in the appropriate directories in your Flutter project.

Now, let’s initialize Firebase in our Flutter app. Open the main.dart file and add the following code:

import 'package:firebase_core/firebase_core.dart';

void main() async {
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
runApp(MyApp());
}

With Firebase initialized, we can now start building the login page.

Building the Login Page

For the login page, we’ll use the firebase_auth package to handle the authentication process. Start by creating a new file called login_page.dart in the lib directory.

In this file, import the necessary packages:

import 'package:flutter/material.dart';
import 'package:firebase_auth/firebase_auth.dart';

Now, let’s create a stateful widget called LoginPage that extends StatefulWidget:

class LoginPage extends StatefulWidget {
@override
_LoginPageState createState() => _LoginPageState();
}

In the _LoginPageState class, we’ll define the UI for the login page. We’ll use a TextFormField for the email input, another TextFormField for the password input, and a RaisedButton for the login button.

Here’s an example of what the UI code could look like:

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Login Page'),
),
body: Padding(
padding: EdgeInsets.all(16.0),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
TextFormField(
decoration: InputDecoration(
labelText: 'Email',
),
),
TextFormField(
decoration: InputDecoration(
labelText: 'Password',
),
obscureText: true,
),
SizedBox(height: 20.0),
RaisedButton(
child: Text('Login'),
onPressed: () {
// TODO: Implement login functionality
},
),
],
),
),
);
}}

Now that we have the UI set up, let’s move on to handling the login logic.

Logging In with Firebase

Inside the onPressed property of the login button, we’ll write the code to authenticate the user with Firebase. Here’s an example of how it could be done:

void _login() async {
try {
UserCredential userCredential = await FirebaseAuth.instance.signInWithEmailAndPassword(
email: _emailController.text,
password: _passwordController.text,
);

// TODO: Navigate to the home page
} catch (e) {
// TODO: Handle login errors
}
}

Don’t forget to define the _emailController and _passwordController variables and initialize them in the initState method of the _LoginPageState class.

With the login logic in place, you can now run your app and test the login functionality!

Conclusion

Congratulations on successfully creating a Flutter login page with Firebase! In this article, we explored the process of setting up Firebase Authentication for your Flutter app and building a login page that integrates with Firebase.

Remember, this is just the beginning. You can further enhance your login page by adding features like password reset, social media login, and more. The possibilities are endless!

Thank you for reading, and happy coding!