Get Started with React Native + Google Sign In

In this post, I will be showing you guys how you can add sign in with Google feature in your app in a few simple steps.

I will be using a React Native Community supported package called react-native-community/google-signin.

Note : This post is made for react-native >= 0.60, if you are using react-native <= 0.59.x then this is not for you

Features

• Support all 3 types of authentication methods (standard, with server-side validation or with offline access (aka server-side access))
• Promise-based API consistent between Android and iOS
• Typings for TypeScript and Flow
• Native signin buttons

Versions

React Native 0.61.5

react-native-community/google-signin 4.0.0

Steps

• First, create the App using this command in terminal

npx react-native init TypeYourAppNameHere

• Navigate to RNGoogleSignInDemo in the terminal like this

cd TypeYourAppNameHere

• Now install react-native-community/google-signin dependency in your app

yarn add @react-native-community/google-signin

OR

npm install --save @react-native-community/google-signin

Since React Native >= 0.60 AutoLinking is supported therefore we don't need to run linking command.

But we do need to do some configuration in the native side but I promise it will be easy.

There are two ways to do this, with or without Firebase and I will be using the one with the Firebase. But for the other one, I can make a separate post for it. Do let me know should I?

Firebase

• Search for Firebase and go to Firebase Console
• Create a project [ I have already created ] by clicking on Add Project.

• Type your project Name after that click Continue

• Choose whether you want to add Analytics or not it's up to your preferences. By default, it's enabled. Press Continue.

Now your project is created.

• Click the android icon in the firebase Console Dashboard

• Fill in the following fields of "Add Firebase to your Android app" to generate config file ( i.e. google-services.json)

  • Android package name
  • Debug signing certificate SHA-1

• For App's Package name you can find in android/app/main/AndroidManifest.xml file

• For Debug signing certificate SHA-1

In terminal type command for Debug SHA1 (root of the project)

Mac/Linux

keytool -J-Duser.language=en -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android

Windows

– Change the directory to the JDK bin directory. The path of the JDK depends upon the operating system you are using

cd C:\Program Files\Java\jdk1.8.0_121\bin

– Now we have to run the following command using the keytool.exe file in JDK/bin

keytool -list -v -keystore "%USERPROFILE%\.android\debug.keystore" -alias androiddebugkey -storepass android -keypass android

If you don't like terminal then you use can Android Studio instead

• When you are done registering your android app with firebase then Download the Config file and place it in android/app

• Add Firebase SDK in Project-level build.gradle i.e. android/build.gradle

buildscript {
    ext {
        buildToolsVersion = "28.0.3"
        minSdkVersion = 16
        compileSdkVersion = 28
        targetSdkVersion = 28
        googlePlayServicesAuthVersion = "18.0.0" // Add this line
    }
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath("com.android.tools.build:gradle:3.4.2")
        classpath 'com.google.gms:google-services:4.3.3' // Add this line
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

• Add Google Play Services plugin in App-level build.gradle (android/appp/build.gradle):

apply plugin: 'com.google.gms.google-services' // Add at end of the file

e.g.

• In firebase, you will need to enable Google option in SignIn Method section

• While enabling Google, do copy the Web Client ID from there, we need this later on.

Let's get our hands dirty with the code

I will be making a simple app of just two components to App.js (already exists by default) and second will be Home.js.

• Import Public Api of @react-native-community/google-signin

import {
  GoogleSignin,
  GoogleSigninButton,
  statusCodes,
} from '@react-native-community/google-signin';

• But before you can use above imports you need call once, configure of GoogleSignin. You can call it in ComponentDidMount life Cycle method or you can use useEffect Hook

GoogleSignin.configure({
 webClientId: WebClientID, // client ID of type WEB for your server(needed to verify user ID and offline access)
 offlineAccess: true, // if you want to access Google API on behalf of the user FROM YOUR SERVER
 forceCodeForRefreshToken: true, // [Android] related to `serverAuthCode`, read the docs link below *.
 accountName: '', // [Android] specifies an account name on the device that should be used
    });

• Sign in function

 signIn = async () => {
    try {
      await GoogleSignin.hasPlayServices();
      const info = await GoogleSignin.signIn();
      console.warn({userInfo: info});
      setUserInfo(info);
    } catch (error) {
      if (error.code === statusCodes.SIGN_IN_CANCELLED) {
        // user cancelled the login flow
      } else if (error.code === statusCodes.IN_PROGRESS) {
        // operation (e.g. sign in) is in progress already
      } else if (error.code === statusCodes.PLAY_SERVICES_NOT_AVAILABLE) {
        // play services not available or outdated
      } else {
        // some other error happened
      }
    }
  };

• Sign out function

  signOut = async () => {
    try {
      await GoogleSignin.revokeAccess();
      await GoogleSignin.signOut();
      setUserInfo(null); // Remember to remove the user from your app's state as well
    } catch (error) {
      console.error(error);
    }
  };

Demo App Preview

Do check the official Docs and if you have any questions let me know.

react-native-community / google-signin

Google Sign-in for your React Native applications

Features

• Support all 3 types of authentication methods (standard, with server-side validation or with offline access (aka server side access))
• Promise-based API consistent between Android and iOS
• Typings for TypeScript and Flow
• Native signin buttons

Project setup and initialization

For RN >= 0.60 please use version 3 installed from @react-native-community/google-signin

yarn add @react-native-community/google-signin

For RN <= 0.59 use version 2 installed from react-native-google-signin

yarn add react-native-google-signin

Then follow the Android guide and iOS guide

Public API

1. GoogleSignin

import {
  GoogleSignin,
  GoogleSigninButton,
  statusCodes,
} from '@react-native-community/google-signin';

configure(options)

It is mandatory to call this method before attempting to call signIn() and signInSilently(). This method is sync meaning you can call signIn / signInSilently right after it. In typical scenarios, configure needs to be called only once, after your app starts. In the native layer, this is a synchronous call.

Example usage with for default options: you…

View on GitHub

I hope you like this post and I will be posting more post soon and most importantly All suggestions are welcome.

Comments

[Jatin Suneja]

For android, I dont seem to understand why we are suppose to use a globally defined keystore when react-native provides one within the project.
if i use the value from globally defined keystore, it raises a DEVELOPER_ERROR (statusCode = 10)

[Franco Quintana]

Hi! I have the same problem. I have seen and followed 945481121 tutos but ever same error. Do you know how to solve ?
I'm sorry for my English. (:

[Enzo Perez]

I had an error to execute the keytool command. In first you must to go to folder project and then replace by this command:

keytool -J-Duser.language=en -list -v -keystore ./android/app/debug.keystore -alias androiddebugkey -storepass android -keypass android

it just change ~ for ./

BTW, thanks for the post!

[Kevin Alan Martinez Virgen]

Please make another post for signin without firebase :D

[Anwar Gul]

Sure , I will soon make a detail post for google signin without firebase

[Fady Guirguis]

Hey! Thank you for your help! Is the new article ready?

[nagaaarung]

How to code Store user credentials in Firebase backend ?

[Anwar Gul]

With this method you only get basic user info like email ,name ,avatar and so on. Unlike login with email where your user has to enter password in the given field ,login with gmail returns a token .

A Token that will be send to custom backend to verify and store user details.