firebase_auth_ui

Flutter plugin of Firebase UI which allows to add login/sign-up quickly.

NOTE: This plugin is under development. Please provide Feedback and Pull Requests in order to have your feature(s) integrated.

Usage

Import

import 'package:firebase_auth_ui/firebase_auth_ui.dart';
import 'package:firebase_auth_ui/providers.dart';

Use of the plugin

Present the auth screen

FirebaseAuthUi.instance()
        .launchAuth(
          [
            AuthProvider.email(), // Login/Sign up with Email and password
            AuthProvider.google(), // Login with Google
            AuthProvider.facebook(), // Login with Facebook
	        AuthProvider.twitter(), // Login with Twitter
          ],
          tosUrl: "https://my-terms-url", // Optional
          privacyPolicyUrl: "https://my-privacy-policy", // Optional,
        )
        .then((firebaseUser) =>
            print("Logged in user is ${firebaseUser.displayName}"))
        .catchError((error) => print("Error $error"));

Logout

void logout() async {
	final result = await FirebaseAuthUi.instance().logout();
	// ...
}

Plugin returns FirebaseUser with following details:

Field	Description
uid	UID of authenticated user
displayName	Display name of user
email	Email of user
phoneNumber	Phone number of user
photoUri	URI of user's photo
providerId	Indicates through which provider user was authenticated.

Please note that above details may be null depending on the provider user used to sign and user's privacy settings on respective provider.

If you want to have full FirebaseUser object then please add firebase_auth dependency. You can then use FirebaseAuth.instance.currentUser().

Configuration

Create a project on Firebase console and add Android and iOS platform in Settings > Your apps

• Open the Authentication section and then navigate to Sign in method. Please enable Email/Password, Google, Facebook and Twitter method depending on your need and click save.
• Navigate back to Settings > Your apps
• Download "google-services.json" for Android
• Download "GoogleService-Info.plist"for iOS

Android

Open project's build.gradle ([flutter_project]/android/build.gradle) and add following in dependencies{ ... }:

classpath 'com.google.gms:google-services:4.3.2'

Open app module's build.gradle ([flutter_project]/android/app/build.gradle) and add following at the end of file, i.e as a last line:

apply plugin: 'com.google.gms.google-services'

Copy the downloaded google-services.json in [flutter_project]/android/app directory.

iOS

Copy the downloaded GoogleService-Info.plist in [[flutter_project]/ios/Runner directory.

Additional setup for Google, Facebook sign-in

Google

Android

No additional setup required.

iOS

• Open the GoogleService-Info.plist and copy REVERSED_CLIENT_ID. It should look like com.googleusercontent.apps.[APP_ID-somevalue]
• Now open "Info.plist" ([flutter_project]/ios/Runner and paste following by replacing [REVERSED_CLIENT_ID] with yours copied in above step:

<key>CFBundleURLTypes</key>
	<array>
		<dict>
			<key>CFBundleURLSchemes</key>
			<array>
				<string>[REVERSED_CLIENT_ID]</string>
			</array>
		</dict>
	</array>

Facebook

Android

Add following lines in strings.xml [flutter_project]/android/app/src/main/res/values

<string name="facebook_application_id" translatable="false">[YOUR_FACEBOOK_APP_ID]</string>
<string name="facebook_login_protocol_scheme" translatable="false">fb[YOUR_FACEBOOK_APP_ID]</string>

iOS

• Add fbFACEBOOK_APP_ID as a URL scheme Open open Info.plist ([flutter_project]/ios/Runner and paste following by replacing [YOUR_FACEBOOK_APP_ID] with yours:

<key>CFBundleURLTypes</key>
	<array>
		<dict>
			<key>CFBundleURLSchemes</key>
			<array>
				<string>fb[YOUR_FACEBOOK_APP_ID]</string>
			</array>
		</dict>
	</array>

NOTE: If you added Google by following above steps, you already have CFBundleURLSchemes key defined with [REVERSE_CLIENT_ID]. In that case, just add

<string>fb[YOUR_FACEBOOK_APP_ID]</string>

below [REVERSE_CLIENT_ID]

• Add facebook app id and app's name in Info.plist

<key>FacebookAppID</key>
	<string>[YOUR_FACEBOOK_APP_ID]</string>
	<key>FacebookDisplayName</key>
	<string>[YOUR_FACEBOOOK_APP_NAME]</string>

Twitter

Android

Add following lines in strings.xml [flutter_project]/android/app/src/main/res/values

<string name="twitter_consumer_key" translatable="false">[YOUR_CONSUMER_KEY]</string>
<string name="twitter_consumer_secret" translatable="false">fb[YOUR_CONSUMER_SECRET]</string>

iOS

If you have already configured Google login for iOS following above steps, then you don't need to do anything else. If not, please follow the exact same step.

Customization

General

• The order of login buttons depends on the sequence of AuthProviders you passed in launchAuth(). For example if you have Email, Google and Facebook auth configured and would like the Facebook to appear first, you can simply pass the AuthProvider.facebook() as first element in the providers list.

Android

• Actionbar title: Define your app's name in strings.xml and that'll appear as title in action bar.
• Actionbar and status bar color: Add following in your colors.xml [flutter_project]/android/app/src/main/res/values

<color name="colorPrimary">#[ACTIONBAR_COLOR]</color>
<color name="colorPrimaryDark">#[STATUSBAR_COLOR]</color>

Note: If you don't have colors.xml, please create one.