React-Native: Google and Facebook Authentication

Published Oct 12, 2017
React-Native: Google and Facebook Authentication

Authentication is an integral part of any application — especially when we want to add some permissions or restrict access to certain views.

To get started, ensure that you have the following installed:

  • NodeJS
  • React-Native CLI
  • Watchman
  • Android Studio
  • XCode

If you don't have any of the above installed, you can install them on MacOS as follows:

  • NodeJS: $ brew install node
  • React-Native CLI: $ npm i -g react-native-cli
  • Watchman: $ brew install watchman
  • Android Studio: can be downloaded here
  • Xcode: can be downloaded from the App Store

NB: You must have Homebrew installed to use the brew command. It is assumed that the reader is using Mac OSX

Step 1 (Initalizing our Authentication App and installing FBSDK and google-signin)

Now that we have installed everything we need, let's get started!

Fire up your Terminal and run the following commands:

  • $ react-native init Authentication
  • $ cd Authentication
  • $ react-native install react-native-fbsdk@0.6.0
  • $ react-native install react-native-google-signin
  • $ react-native run-ios

You should have a screen similar to the one below after executing the above commands
Screen Shot 2017-10-08 at 2.42.17 PM.png

Step 2 (Configuring FBSDK in our App)

  • Facebook SDK
    Visit and create a new app

    • iOS configuration
      • $ open. (This will open your current directory in Finder)
      • Open Authentication.xcodeproj
      • Follow Step 2- 11 here
    • Android Configuration
      • Open our Authentication app's Android folder in Android Studio
      • Follow the steps here
      • After following the steps above, open our app level build.gradle and update the following:
        • compileSdkVersion: 25
        • targetSdkVersion: 23
        • dependencies { compile "" // change from 23.0.1 }
    • Update your Android manifest as described here.
    • Run $ react-native run-andriod

    After the above steps have been completed, let's write our LogIn component and test out our configuration:

  • Create a folder components in our app directory and add a new file LogIn.js

  • Copy the code below into LogIn.js

import React, {Component} from 'react';
import {LoginManager} from 'react-native-fbsdk';
import {TouchableOpacity, Text, View} from 'react-native';

export default class LogIn extends Component {
  fbAuth() {
      function (result) {
        if (result.isCancelled) {
          console.log('Login was cancelled');
        } else {
          console.log('Login was successful with permissions: '
            + result.grantedPermissions.toString());
      function (error) {
        console.log('Login failed with error: ' + error);
  render() {
    return (
        <TouchableOpacity onPress={this.fbAuth.bind(this)}>
          <Text>Login with Facebook</Text>
  • Import our new component into App.js in our app's root directory. Its contents should look similar to the code below:
import React, {Component} from 'react';
import {
} from 'react-native';

import LogIn from './components/LogIn';

export default class App extends Component<{}> {
  render() {
    return (
      <View style={styles.container}>
        <LogIn />

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',

Now, let's stop the current instance of our app and run $ react-native run-ios on Terminal again. Our App screen should look similar to the screen below
Screen Shot 2017-10-08 at 6.26.49 PM.png

Let's test that our login works by clicking Login with Facebook. We should get a screen similar to that below or get a screen requesting us to enter our Facebook credentials
Screen Shot 2017-10-08 at 6.26.15 PM.png

Step 3 (Configure Google Authentication)

  • iOS configuration
    • Let's open our application node_modules folder and find react-native-google-signin and open its ios folder. It should look like the image below:
      Screen Shot 2017-10-08 at 6.52.18 PM.png
    • Drag RNGoogleSignin.xcodeproj into our Xcode project Libraries Group as shown below
      Screen Shot 2017-10-08 at 6.39.14 PM.png
    • Open the GoogleSdk folder and drag all files that end with .framework into the Frameworks group of our application and make sure "Copy items if needed" is ticked.
    • Follow Steps 2-3 here
  • Android Configuration
    • Follow the steps here.

After completing the steps above, add the following methods to our LogIn component:

  componentDidMount() {

  googleAuth() {
      .then((user) => {
      .catch((err) => {
        console.log('WRONG SIGNIN', err);

  async setupGoogleSignin() {
    try {
      await GoogleSignin.hasPlayServices({ autoResolve: true });
      await GoogleSignin.configure({
        iosClientId: settings.iOSClientId,
        webClientId: settings.webClientId,
        offlineAccess: false

      const user = await GoogleSignin.currentUserAsync();
    catch (err) {
      console.log("Google signin error", err.code, err.message);

Also, in our LogIn component's render methodm, add the Google Login button like it's shown below:

<TouchableOpacity onPress={this.googleAuth.bind(this)}>
  <Text>Login with Google</Text>

Now, let's stop our current application process and run $ react-native run-ios again. Our screen should look like the one below:
Screen Shot 2017-10-08 at 8.15.42 PM.png

Let's test that our login works by clicking Login with Google. We should get a screen similar to that below or get a screen requesting us to enter our Google credentials
Screen Shot 2017-10-08 at 8.17.16 PM.png


Now that we have authentication set up in our application, we can customize persisting user information any way we want. Source code for this article can be found here.

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