3.2.2

• Don't use the result code when handling signin. This results in better error codes because result code always returns "cancelled".

3.2.1

• Set http version to be compatible with flutter_test.

3.2.0

• Add support for clearing authentication cache for Android.

3.1.0

• Add support to recover authentication for Android.

3.0.6

• Remove flaky displayName assertion

3.0.5

• Added missing http package dependency.

3.0.4

• Updated Gradle tooling to match Android Studio 3.1.2.

3.0.3+1

• Added documentation on where to find the list of available scopes.

3.0.3

• Added support for games sign in on Android.

3.0.2

• Updated Google Play Services dependency to version 15.0.0.

3.0.1

• Simplified podspec for Cocoapods 1.5.0, avoiding link issues in app archives.

3.0.0

• Breaking change. Set SDK constraints to match the Flutter beta release.

2.1.2

• Added a Delegate interface (IDelegate) that can be implemented by clients in order to override the functionality (for testing purposes for example).

2.1.1

• Fixed Dart 2 type errors.

2.1.0

• Enabled use in Swift projects.

2.0.1

• Simplified and upgraded Android project template to Android SDK 27.
• Updated package description.

2.0.0

• Breaking change. Upgraded to Gradle 4.1 and Android Studio Gradle plugin 3.0.1. Older Flutter projects need to upgrade their Gradle setup as well in order to use this version of the plugin. Instructions can be found here.
• Relaxed GMS dependency to [11.4.0,12.0[

1.0.3

• Add FLT prefix to iOS types

1.0.2

• Support setting foregroundColor in the avatar.

1.0.1

• Change GMS dependency to 11.+

1.0.0

• Make GoogleUserCircleAvatar fade profile image over the top of placeholder
• Bump to released version

0.3.1

• Updated GMS to always use latest patch version for 11.0.x builds

0.3.0

• Add a new GoogleIdentity interface, implemented by GoogleSignInAccount.
• Move GoogleUserCircleAvatar to "widgets" library (exported by base library for backwards compatibility) and make it take an instance of GoogleIdentity, thus allowing it to be used by other packages that provide implementations of GoogleIdentity.

0.2.1

• Plugin can (once again) be used in apps that extend FlutterActivity
• signInSilently is guaranteed to never throw
• A failed sign-in (caused by a failing init step) will no longer block subsequent sign-in attempts

0.2.0

• Updated dependencies
• Breaking Change: You need to add a maven section with the "https://maven.google.com" endpoint to the repository section of your android/build.gradle. For example:

allprojects {
    repositories {
        jcenter()
        maven {                              // NEW
            url "https://maven.google.com"   // NEW
        }                                    // NEW
    }
}

0.1.0

• Update to use GoogleSignIn CocoaPod

0.0.6

• Fix crash on iOS when signing in caused by nil uiDelegate

0.0.5

• Require the use of support-v4 library on Android. This is an API change in that plugin users will need their activity class to be an instance of android.support.v4.app.FragmentActivity. Flutter framework provides such an activity out of the box: io.flutter.app.FlutterFragmentActivity
• Ignore "Broken pipe" errors affecting iOS simulator
• Update to non-deprecated application:openURL:options: on iOS

0.0.4

• Prevent race conditions when GoogleSignIn methods are called concurrently (#94)

0.0.3

• Fix signOut and disconnect (they were silently ignored)
• Fix test (#10050)

0.0.2

• Don't try to sign in again if user is already signed in

0.0.1

• Initial Release

example/lib/main.dart

// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:async';
import 'dart:convert' show json;

import "package:http/http.dart" as http;
import 'package:flutter/material.dart';
import 'package:google_sign_in/google_sign_in.dart';

GoogleSignIn _googleSignIn = GoogleSignIn(
  scopes: <String>[
    'email',
    'https://www.googleapis.com/auth/contacts.readonly',
  ],
);

void main() {
  runApp(
    MaterialApp(
      title: 'Google Sign In',
      home: SignInDemo(),
    ),
  );
}

class SignInDemo extends StatefulWidget {
  @override
  State createState() => SignInDemoState();
}

class SignInDemoState extends State<SignInDemo> {
  GoogleSignInAccount _currentUser;
  String _contactText;

  @override
  void initState() {
    super.initState();
    _googleSignIn.onCurrentUserChanged.listen((GoogleSignInAccount account) {
      setState(() {
        _currentUser = account;
      });
      if (_currentUser != null) {
        _handleGetContact();
      }
    });
    _googleSignIn.signInSilently();
  }

  Future<void> _handleGetContact() async {
    setState(() {
      _contactText = "Loading contact info...";
    });
    final http.Response response = await http.get(
      'https://people.googleapis.com/v1/people/me/connections'
          '?requestMask.includeField=person.names',
      headers: await _currentUser.authHeaders,
    );
    if (response.statusCode != 200) {
      setState(() {
        _contactText = "People API gave a ${response.statusCode} "
            "response. Check logs for details.";
      });
      print('People API ${response.statusCode} response: ${response.body}');
      return;
    }
    final Map<String, dynamic> data = json.decode(response.body);
    final String namedContact = _pickFirstNamedContact(data);
    setState(() {
      if (namedContact != null) {
        _contactText = "I see you know $namedContact!";
      } else {
        _contactText = "No contacts to display.";
      }
    });
  }

  String _pickFirstNamedContact(Map<String, dynamic> data) {
    final List<dynamic> connections = data['connections'];
    final Map<String, dynamic> contact = connections?.firstWhere(
      (dynamic contact) => contact['names'] != null,
      orElse: () => null,
    );
    if (contact != null) {
      final Map<String, dynamic> name = contact['names'].firstWhere(
        (dynamic name) => name['displayName'] != null,
        orElse: () => null,
      );
      if (name != null) {
        return name['displayName'];
      }
    }
    return null;
  }

  Future<void> _handleSignIn() async {
    try {
      await _googleSignIn.signIn();
    } catch (error) {
      print(error);
    }
  }

  Future<void> _handleSignOut() async {
    _googleSignIn.disconnect();
  }

  Widget _buildBody() {
    if (_currentUser != null) {
      return Column(
        mainAxisAlignment: MainAxisAlignment.spaceAround,
        children: <Widget>[
          ListTile(
            leading: GoogleUserCircleAvatar(
              identity: _currentUser,
            ),
            title: Text(_currentUser.displayName),
            subtitle: Text(_currentUser.email),
          ),
          const Text("Signed in successfully."),
          Text(_contactText),
          RaisedButton(
            child: const Text('SIGN OUT'),
            onPressed: _handleSignOut,
          ),
          RaisedButton(
            child: const Text('REFRESH'),
            onPressed: _handleGetContact,
          ),
        ],
      );
    } else {
      return Column(
        mainAxisAlignment: MainAxisAlignment.spaceAround,
        children: <Widget>[
          const Text("You are not currently signed in."),
          RaisedButton(
            child: const Text('SIGN IN'),
            onPressed: _handleSignIn,
          ),
        ],
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: const Text('Google Sign In'),
        ),
        body: ConstrainedBox(
          constraints: const BoxConstraints.expand(),
          child: _buildBody(),
        ));
  }
}