Capacitor plugin for Google Auth.

PRs are welcome and much appreciated that keeps this plugin up to date with Capacitor and official Google Auth platform library feature parity.

Try to follow good code practices. You can even help keeping the included demo updated.

PRs for features that are not aligned with the official Google Auth library are discouraged.

(We are beginner-friendly here)

npm i --save @codetrix-studio/capacitor-google-auth

# or for Capacitor 2.x.x
npm i --save @codetrix-studio/[email protected]

npx cap update

if your migrate from Capacitor 2 to Capacitor 3 see instruction for migrate plugin to new version

for capacitor 2.x.x use instruction

Register plugin and manually initialize

import { GoogleAuth } from '@codetrix-studio/capacitor-google-auth';

// use hook after platform dom ready
GoogleAuth.initialize({
  client_id: 'CLIENT_ID.apps.googleusercontent.com',
  scopes: ['profile', 'email'],
  grantOfflineAccess: true,
});

or if need use meta tags

<meta name="google-signin-client_id" content="{your client id here}" />
<meta name="google-signin-scope" content="profile email" />

• client_id - The app's client ID, found and created in the Google Developers Console.
• scopes – same as Configure scopes
• grantOfflineAccess – boolean, default false, Set if your application needs to refresh access tokens when the user is not present at the browser.

Use it

GoogleAuth.signIn();

init hook

// app.component.ts
constructor() {
  this.initializeApp();
}

initializeApp() {
  this.platform.ready().then(() => {
    GoogleAuth.initialize()
  })
}

sign in function

async googleSignIn() {
  let googleUser = await GoogleAuth.signIn();
  const credential = auth.GoogleAuthProvider.credential(googleUser.authentication.idToken);
  return this.afAuth.auth.signInAndRetrieveDataWithCredential(credential);
}

// App.vue
import { defineComponent, onMounted } from 'vue';
import { GoogleAuth } from '@codetrix-studio/capacitor-google-auth';

export default defineComponent({
  setup() {
    onMounted(() => {
      GoogleAuth.initialize();
    });

    const logIn = async () => {
      const response = await GoogleAuth.signIn();
      console.log(response);
    };

    return {
      logIn,
    };
  },
});

or see more CapacitorGoogleAuth-Vue3-example

1. Create in Google cloud console credential Client ID for iOS and get Client ID and iOS URL scheme

2. Add identifier REVERSED_CLIENT_ID as URL schemes to Info.plist from iOS URL scheme
   (Xcode: App - Targets/App - Info - URL Types, click plus icon)

3. Set Client ID one of the ways:

   1. Set in capacitor.config.json
      • iosClientId - specific key for iOS
      • clientId - or common key for Android and iOS
   2. Download GoogleService-Info.plist file with CLIENT_ID and copy to ios/App/App necessarily through Xcode for indexing.

plugin first use iosClientId if not found use clientId if not found use value CLIENT_ID from file GoogleService-Info.plist

Set Client ID :

1. In capacitor.config.json

   • androidClientId - specific key for Android
   • clientId - or common key for Android and iOS

2. or set inside your strings.xml

plugin first use androidClientId if not found use clientId if not found use value server_client_id from file strings.xml

<resources>
  <string name="server_client_id">Your Web Client Key</string>
</resources>

Import package inside your MainActivity

import com.codetrixstudio.capacitor.GoogleAuth.GoogleAuth;

Register plugin inside your MainActivity.onCreate

this.init(savedInstanceState, new ArrayList<Class<? extends Plugin>>() {{
  add(GoogleAuth.class);
}});

Provide configuration in root capacitor.config.json

{
  "plugins": {
    "GoogleAuth": {
      "scopes": ["profile", "email"],
      "serverClientId": "xxxxxx-xxxxxxxxxxxxxxxxxx.apps.googleusercontent.com",
      "forceCodeForRefreshToken": true
    }
  }
}

or in capacitor.config.ts

/// <reference types="'@codetrix-studio/capacitor-google-auth'" />

const config: CapacitorConfig = {
  plugins: {
    GoogleAuth: {
      scopes: ['profile', 'email'],
      serverClientId: 'xxxxxx-xxxxxxxxxxxxxxxxxx.apps.googleusercontent.com',
      forceCodeForRefreshToken: true,
    },
  },
};

export default config;

- GoogleAuth.init()
+ GoogleAuth.initialize()

After migrate to Capcitor 3 updating you projects, see diff:

- import "@codetrix-studio/capacitor-google-auth";
- import { Plugins } from '@capacitor/core';
+ import { GoogleAuth } from '@codetrix-studio/capacitor-google-auth'

- Plugins.GoogleAuth.signIn();
+ GoogleAuth.init()
+ GoogleAuth.signIn()