google_sign_in 0.0.6 google_sign_in: ^0.0.6 copied to clipboard
Google Sign-In plugin for Flutter.
// 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 = new GoogleSignIn(
scopes: <String>[
'email',
'https://www.googleapis.com/auth/contacts.readonly',
],
);
void main() {
runApp(
new MaterialApp(
title: 'Google Sign In',
home: new SignInDemo(),
),
);
}
class SignInDemo extends StatefulWidget {
@override
State createState() => new 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<Null> _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<Map<String, dynamic>> connections = data['connections'];
final Map<String, dynamic> contact = connections?.firstWhere(
(Map<String, dynamic> contact) => contact['names'] != null,
orElse: () => null,
);
if (contact != null) {
final Map<String, dynamic> name = contact['names'].firstWhere(
(Map<String, dynamic> name) => name['displayName'] != null,
orElse: () => null,
);
if (name != null) {
return name['displayName'];
}
}
return null;
}
Future<Null> _handleSignIn() async {
try {
await _googleSignIn.signIn();
} catch (error) {
print(error);
}
}
Future<Null> _handleSignOut() async {
_googleSignIn.disconnect();
}
Widget _buildBody() {
if (_currentUser != null) {
return new Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
new ListTile(
leading: new GoogleUserCircleAvatar(_currentUser.photoUrl),
title: new Text(_currentUser.displayName),
subtitle: new Text(_currentUser.email),
),
const Text("Signed in successfully."),
new Text(_contactText),
new RaisedButton(
child: const Text('SIGN OUT'),
onPressed: _handleSignOut,
),
new RaisedButton(
child: const Text('REFRESH'),
onPressed: _handleGetContact,
),
],
);
} else {
return new Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
const Text("You are not currently signed in."),
new RaisedButton(
child: const Text('SIGN IN'),
onPressed: _handleSignIn,
),
],
);
}
}
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: const Text('Google Sign In'),
),
body: new ConstrainedBox(
constraints: const BoxConstraints.expand(),
child: _buildBody(),
));
}
}