Google Signin

@nativescript/google-signin #

Contents #

• Installation
• Android prerequisites
• iOS prerequisites
• Use @nativescript/google-signin
  • Sign in
  • Styling the GoogleSignInButton
• API
  • GoogleSignin
    • configure()
      • Configuration
    • signIn()
    • signInSilently()
    • isSignedIn()
    • playServicesAvailable()
    • signOut()
    • disconnect()
    • getTokens()
    • getCurrentUser()
  • User
  • GoogleSignInButton

Intro #

A plugin that allows you to authenticate users with Google Sign-In.

Installation #

Install the plugin by running the following command at the root of the project.

npm install @nativescript/google-signin

Android prerequisites #

1. To use GoogleSignIn for Android, visit Add Firebase to your Android project and follow the 2 steps below.

• Create a Firebase project

• Register your app with Firebase

You don't need to include the google-services.json file mentioned in Add a Firebase configuration file in your app unless you are using other Google services that require it.

2. Generate debug SHA-1 fingerprint and add it to your Firebase project.

Generate the SHA-1 fingerprint for the debug keystore on your machine and add it to your app's Firebase project. Failure to do so will result in the Error: 10 error.

To generate the SHA-1 fingerprint for the debug keystore with the following commands. For the debug keystore, the password is android.

• macOS/Linux

keytool -list -v \
-alias androiddebugkey -keystore ~/.android/debug.keystore

• Windows

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

3. Enable the OAuth APIs that you want, using the Google Cloud Platform API manager. Make sure you've filled out all the required fields in the console for OAuth consent screen. Otherwise, you may encounter APIException errors.

iOS prerequisites #

1. This plugin requires iOS 9.0+.

2. To use GoogleSignIn for iOS, set up the app with Firebase with the following steps at Add Firebase to your Apple project:

   1. Create a Firebase project
   2. Register your app with Firebase
   3. Add a Firebase configuration file, GoogleService-Info.plist. to App_Resources/iOS/.
   4. Enter Google Cloud and choose your project created from firebase. Access the Apis and Services -> Credentials section and add a new credential of type OAuth Client ID. In application type choose iOS. Return to the Credentials screen and enter your new key in the OAuth 2.0 Client ID section. Copy Client ID and iOS URL Scheme for next step.
   5. Add the CFBundleURLTypes and GIDClientID attributes below to the App_Resources/iOS/Info.plist file.

<!-- Google Sign-in Section -->
<key>CFBundleURLTypes</key>
<array>
	<dict>
		<key>CFBundleTypeRole</key>
		<string>Editor</string>
		<key>CFBundleURLSchemes</key>
		<array>
			<!-- TODO Replace this value: -->
			<!-- Paste your iOS URL Scheme here -->
			<string>com.googleusercontent.apps.292142294722-23nmrq9mn8rhpqipjc1bt4qecga3qgsf</string>
		</array>
	</dict>
</array>
<key>GIDClientID</key>
<!-- Paste your Client ID here -->
<string>749673967192-c24phj29u2otpict36e71ocjo2g5i3hs.apps.googleusercontent.com</string>
<!-- End of the Google Sign-in Section -->

Use @nativescript/google-signin #

Sign in #

To sign in a user with GoogleSignIn, follow the steps below.

1. Register and add the GoogleSignInButton to your markup to be able to initiate GoogleSigIn.

• Core

<Page xmlns:ui="@nativescript/google-signin">
  <ui:GoogleSigninButton tap="handleSignIn" colorScheme='auto' colorStyle='standard' />
</Page>

• Angular

Register the button as follows:

import { registerElement } from '@nativescript/angular'
registerElement(
  'GoogleSignInButton',
  () => require('@nativescript/google-signin').GoogleSignInButton
)

Next, add it to your html file setting the desired option for colorScheme and colorStyle as:

<GoogleSignInButton colorScheme='auto' colorStyle='standard' (tap)="yourGoogleSigninFunction()"></GoogleSignInButton>

Vue #

To register the button, add the following code to the main.ts file.

registerElement(
  'GoogleSignInButton',
  () => require('@nativescript/google-signin').GoogleSignInButton
)

Then use it in a .vue file as follows:

<GoogleSignInButton colorScheme='auto' colorStyle='standard' @tap="yourGoogleSigninFunction"></GoogleSignInButton>

2. Call the signIn() method on GoogleSignInButton tap

Before you call the signIn() or the signInSilently() method to sign in the user, call configure() to initialize Firebase. If you do want to set any configuration options, you can pass an empty object {} as a parameter to configure.

import { GoogleSignin } from '@nativescript/google-signin'

try {
  await GoogleSignin.configure({})
  const user = await GoogleSignin.signIn()
} catch (e) {}

Styling the GoogleSignInButton #

GoogleSignInButton is a View instance so you can use the View class styling properties. Additionally, the plugin offers the colorScheme and colorStyle properties.

API #

GoogleSignIn #

The class that provides GoogleSignIn API. It has the following methods:

configure() #

await GoogleSignIn.configure(configuration)

Specifies the properties of the sign-in request, such as scopes,accountName, etc.

Call this method before calling the signIn() or signInSilently() method. Call it only once, after your app starts.

The configuration parameter is an optional Configuration object.

Configuration #

The Configuration object has the following properties. All properties are optional.

signIn() #

user: User = await GoogleSignin.signIn()

Prompts a modal to let the user sign in into the application.

signInSilently() #

user: User = await GoogleSignin.signInSilently()

isSignedIn() #

isUserSignedIn: boolean = GoogleSignin.isSignedIn()

Checks whether the user is currently signed in.

playServicesAvailable() #

isPlayServicesAvailable: boolean = await GoogleSignin.playServicesAvailable()

Checks if device has Google Play Services installed. Always resolves to true on iOS.

Presence of up-to-date Google Play Services is required to show the sign in modal.

signOut() #

GoogleSignin.signOut()

Signs out the current user.

disconnect() #

await GoogleSignin.disconnect()

Disconnects the current user.

getTokens() #

tokens: { idToken: string; accessToken: string;} = await GoogleSignin.getTokens()

Resolves with an object containing { idToken: string, accessToken: string, } or rejects with an error. Note that using accessToken for identity assertion on your backend server is discouraged.

getCurrentUser() #

user : User | null = GoogleSignin.getCurrentUser()

This method resolves with null or a User object.

User #

The user object has the following members:

GoogleSignInButton #

License #

Apache License Version 2.0