ESP32 | FLUTTER | FIREBASE - Temperature & Humidity Check App

Esp32_Flutter_firebase_DHT/esp32_firebase/lib/main.dart

@@ -0,0 +1,98 @@
+import 'package:firebase_auth/firebase_auth.dart';
+import 'package:flutter/material.dart';
+import 'package:google_sign_in/google_sign_in.dart';
+
+import 'Dashboard.dart';
+
+void main() => runApp(MyApp());
+
+class MyApp extends StatelessWidget {
+  // This widget is the root of your application.
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'ESP32 Temp & humid App',
+      theme: ThemeData(
+        primarySwatch: Colors.teal,
+      ),
+      home: LoginScreen(title: 'ESP32 Temp & humid App'),
+      debugShowCheckedModeBanner: false,
+    );
+  }
+}
+
+class LoginScreen extends StatefulWidget {
+  final String title;
+
+  LoginScreen({Key key, this.title}) : super(key: key);
+
+  @override
+  _LoginScreenState createState() => _LoginScreenState();
+}
+
+class _LoginScreenState extends State<LoginScreen> {
+  final FirebaseAuth firebaseAuth = FirebaseAuth.instance;
+
+  GoogleSignIn _googleSignIn = GoogleSignIn(
+    scopes: <String>['email'],
+  );
+
+  GoogleSignInAccount _currentUser;
+
+  @override
+  void initState() {
+    super.initState();
+    _googleSignIn.onCurrentUserChanged.listen((GoogleSignInAccount account) {
+      setState(() {
+        _currentUser = account;
+      });
+
+      if (_currentUser != null) {
+        _handleFirebase();
+      }
+    });
+
+    _googleSignIn.signInSilently(); //Auto login if previous login was success
+  }
+
+  void _handleFirebase() async {
+    GoogleSignInAuthentication googleAuth = await _currentUser.authentication;
+
+    final AuthCredential credential = GoogleAuthProvider.getCredential(
+        idToken: googleAuth.idToken, accessToken: googleAuth.accessToken);
+
+    final FirebaseUser firebaseUser =
+        await firebaseAuth.signInWithCredential(credential);
+
+    if (firebaseUser != null) {
+      print('Login');
+
+      Navigator.of(context).pushReplacement(
+          new MaterialPageRoute(builder: (context) => new Dashboard()));
+    }
+  }
+
+  Future<void> _handleSignIn() async {
+    try {
+      await _googleSignIn.signIn();
+    } catch (error) {
+      print(error);
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.title),
+      ),
+      body: Center(
+        child: FlatButton(
+          onPressed: _handleSignIn,
+          child: Text('Google Sign in'),
+          color: Colors.amber,
+        ),
+      ),
+    );
+  }
+}