code

src/flutter/lib/Screens/Home.dart

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+import 'package:flutter/material.dart';
+
+import '../Components/BG.dart';
+import '../Components/Button.dart';
+import '../Components/ListItem.dart';
+import '../Components/Logo.dart';
+
+class Home extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return BG(
+        child: Center(
+            child: Column(
+      mainAxisSize: MainAxisSize.min,
+      children: <Widget>[
+        Padding(padding: EdgeInsets.only(bottom: 80.0), child: Logo()),
+        Button(
+          callback: () {
+            // Navigator.pushNamed(context, '/scan');
+            Navigator.pushNamed(context, '/success/1');
+          },
+          text: "Scan",
+        ),
+        Padding(
+            padding: const EdgeInsets.only(top: 100.0),
+            child: Column(
+              crossAxisAlignment: CrossAxisAlignment.start,
+              children: <Widget>[
+                ListItem(left: 1, right: 'Open Camera.'),
+                ListItem(left: 2, right: 'Scan QR code.'),
+                ListItem(left: 2, right: 'Get notified.'),
+              ],
+            ))
+      ],
+    )));
+  }
+}

src/flutter/lib/Screens/Scan.dart

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+import 'dart:async';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+import 'package:barcode_scan/barcode_scan.dart';
+
+import '../Components/BG.dart';
+import '../Components/SyncIcon.dart';
+
+class Scan extends StatelessWidget {
+  Future scan() async {
+    try {
+      String barcode = await BarcodeScanner.scan();
+      print('Success');
+      print(barcode);
+      Navigator.pushNamed(null, '/home');
+    } on PlatformException catch (e) {
+      if (e.code == BarcodeScanner.CameraAccessDenied)
+        print('The user did not grant the camera permission!');
+    } catch (e) {
+      print('Nope');
+      print(e);
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) => BG(
+          child: Center(
+              child: Column(
+        mainAxisSize: MainAxisSize.min,
+        children: <Widget>[
+          Text(
+            'Scanning...',
+            style: TextStyle(fontWeight: FontWeight.bold),
+          ),
+          SyncIcon()
+        ],
+      )));
+}

src/flutter/lib/Screens/Success.dart

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+import 'package:flutter/material.dart';
+import 'package:flutter_local_notifications/flutter_local_notifications.dart';
+
+import '../Components/BG.dart';
+import '../Components/Button.dart';
+
+class Success extends StatelessWidget {
+  final int result;
+
+  Success({@required this.result}) {
+    final initializationSettings = InitializationSettings(
+        AndroidInitializationSettings('app_icon'), IOSInitializationSettings());
+    final flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin()
+      ..initialize(initializationSettings);
+
+    flutterLocalNotificationsPlugin.show(
+      this.result,
+      '🚀 Scan succeded!',
+      'Your super sercret code is: $result',
+      NotificationDetails(
+          AndroidNotificationDetails('your channel id', 'your channel name',
+              'your channel description',
+              importance: Importance.Max, priority: Priority.High),
+          IOSNotificationDetails()),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) => BG(
+          child: Center(
+              child: Column(
+        mainAxisSize: MainAxisSize.min,
+        children: <Widget>[
+          Padding(
+            padding: EdgeInsets.only(top: 150.0, bottom: 100.0),
+            child: Button(
+              text: 'Back',
+              callback: () =>
+                  Navigator.popUntil(context, ModalRoute.withName('/')),
+            ),
+          ),
+          Text(
+            'Success',
+            style: TextStyle(fontWeight: FontWeight.bold),
+          ),
+          Container(
+            margin: EdgeInsets.symmetric(vertical: 10.0),
+            height: 32.0,
+            width: 32.0,
+            child: Image.asset('images/check.png'),
+          )
+        ],
+      )));
+}