flutter_facebook_auth 1.0.0+3

Flutter plugin to make easy the facebook authentication in your flutter app.

example/lib/main.dart

import 'dart:convert';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_facebook_auth/flutter_facebook_auth.dart';

void main() {
  runApp(MyApp());
}

String prettyPrint(Map json) {
  JsonEncoder encoder = new JsonEncoder.withIndent('  ');
  String pretty = encoder.convert(json);
  return pretty;
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  Map<String, dynamic> _userData;
  AccessToken _accessToken;
  bool _checking = true;

  @override
  void initState() {
    super.initState();
    _checkIfIsLogged();
  }

  Future<void> _checkIfIsLogged() async {
    final AccessToken accessToken = await FacebookAuth.instance.isLogged;
    setState(() {
      _checking = false;
    });
    if (accessToken != null) {
      print("is Logged:::: ${prettyPrint(accessToken.toJson())}");
      // now you can call to  FacebookAuth.instance.getUserData();
      final userData = await FacebookAuth.instance.getUserData();
      // final userData = await FacebookAuth.instance.getUserData(fields: "email,birthday,friends,gender,link");
      _accessToken = accessToken;
      setState(() {
        _userData = userData;
      });
    }
  }

  void _printCredentials() {
    print(
      prettyPrint(_accessToken.toJson()),
    );
  }

  Future<void> _login() async {
    try {
      setState(() {
        _checking = true;
      });
      _accessToken = await FacebookAuth.instance.login();
      // _accessToken = await FacebookAuth.instance.login(
      //   permissions: ['email', 'user_birthday', 'user_friends', 'user_gender', 'user_link'],
      // );
      _checking = false;
      _printCredentials();
      // get the user data
      final userData = await FacebookAuth.instance.getUserData();
      // final userData = await FacebookAuth.instance.getUserData(fields: "email,birthday,friends,gender,link");
      _userData = userData;
      setState(() {});
    } catch (e, s) {
      print(e);
      print(s);
      if (e is FacebookAuthException) {
        print(e.message);
        switch (e.errorCode) {
          case FacebookAuthErrorCode.OPERATION_IN_PROGRESS:
            print("You have a previous login operation in progress");
            break;
          case FacebookAuthErrorCode.CANCELLED:
            print("login cancelled");
            break;
          case FacebookAuthErrorCode.FAILED:
            print("login failed");
            break;
        }
      }
      setState(() {
        _checking = false;
      });
    }
  }

  Future<void> _logOut() async {
    await FacebookAuth.instance.logOut();
    _accessToken = null;
    _userData = null;
    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Facebook Auth Example'),
        ),
        body: _checking
            ? Center(
                child: CircularProgressIndicator(),
              )
            : SingleChildScrollView(
                child: Padding(
                  padding: const EdgeInsets.all(8.0),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: <Widget>[
                      Text(
                        _userData != null ? prettyPrint(_userData) : "NO LOGGED",
                      ),
                      SizedBox(height: 20),
                      _accessToken != null
                          ? Text(
                              prettyPrint(_accessToken.toJson()),
                            )
                          : Container(),
                      SizedBox(height: 20),
                      CupertinoButton(
                        color: Colors.blue,
                        child: Text(
                          _userData != null ? "LOGOUT" : "LOGIN",
                          style: TextStyle(color: Colors.white),
                        ),
                        onPressed: _userData != null ? _logOut : _login,
                      ),
                      SizedBox(height: 50),
                    ],
                  ),
                ),
              ),
      ),
    );
  }
}