dartnative_social_sign_in

Social sign-in for DartNative — Google Sign-In on both platforms, plus native Sign in with Apple on iOS. Backed by the platform's own auth flows (GoogleSignIn / Android Credential Manager and ASAuthorizationController).

Why you'll like it

• The native sign-in sheets — the real Google account picker and the system Sign in with Apple sheet, not a web view you have to babysit.
• Familiar API — GoogleSignIn().signIn() and SignInWithApple.getAppleIDCredential(...), mirroring the packages you already know.
• The tokens you need — ID token and access token from Google, the authorization credential from Apple, ready to hand to your backend or Supabase.

Highlights

• GoogleSignIn({serverClientId}).signIn() → a GoogleSignInAccount (email, displayName, authentication.idToken / accessToken), or null if canceled. iOS and Android.
• SignInWithApple.getAppleIDCredential({scopes, nonce}) → an AuthorizationCredentialAppleID. iOS only — Apple provides no native Android SDK.

Install

dependencies:
  dartnative_social_sign_in: ^1.0.0   # from dartpub.dev

dn pub get

Register the plugin once, in main():

void main() {
  DartNativePluginRegistrant.registerAll();
  runApp(const MyApp());
}

Quick look

Google Sign-In (iOS and Android)

import 'package:dartnative_social_sign_in/social_sign_in.dart';

final account = await GoogleSignIn(serverClientId: 'YOUR-WEB-CLIENT-ID').signIn();
if (account != null) {
  final idToken = account.authentication.idToken;   // send to your backend
  print('Signed in as ${account.email}');
}

Sign in with Apple (iOS only)

final credential = await SignInWithApple.getAppleIDCredential(
  scopes: [
    AppleIDAuthorizationScopes.email,
    AppleIDAuthorizationScopes.fullName,
  ],
);
// credential.identityToken / credential.authorizationCode → your backend

Platform setup

iOS

Google Sign-In:

1. Add GoogleService-Info.plist to your app target — the iOS client ID is read from its CLIENT_ID key. The plist only contains CLIENT_ID / REVERSED_CLIENT_ID after the iOS OAuth client exists — enable the Google provider in Firebase Authentication (or create the iOS OAuth client in the Cloud console) and re-download the plist. Alternatively set GIDClientID directly in Info.plist — it takes precedence over the plist.
2. Add your app's REVERSED_CLIENT_ID (from that plist) as a URL scheme in Info.plist — it's how the OAuth redirect returns to your app.

If no client ID can be resolved, signIn() completes with an error result explaining the missing configuration (it never crashes).

Sign in with Apple: enable the Sign in with Apple capability for your app target (adds the com.apple.developer.applesignin entitlement, referenced from the target's CODE_SIGN_ENTITLEMENTS build setting). Without it authorization fails with error 1000. The capability needs an explicit App ID, so use a bundle identifier unique to your team.

Android

Google Sign-In uses the Android Credential Manager — no config file needed, but two OAuth clients must exist in your Google Cloud project:

1. A web client — pass its ID as serverClientId in code (the ID token is addressed to your server, which is what verifies it).
2. An Android client matching your app's package name and SHA-1 signing fingerprint (./gradlew signingReport prints the debug SHA-1; in Firebase: Project settings → your Android app → Add fingerprint). Without it Google recognizes no app and issues no credentials.

Sign in with Apple is not available on Android (Apple ships no native Android SDK).

Credits & license

Based on google_sign_in (Flutter Authors, BSD-3) and sign_in_with_apple (About You GmbH, MIT), reworked to run natively on DartNative.

Commercial plugin distributed via dartpub.dev — file issues on the plugin's page.