added barcode scanner

android/app/build.gradle

@@ -26,7 +26,7 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion flutter.compileSdkVersion
+    compileSdkVersion 33
     ndkVersion flutter.ndkVersion
 
     compileOptions {
@@ -47,7 +47,7 @@ android {
         applicationId "com.example.smoke_cess_app"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
-        minSdkVersion flutter.minSdkVersion
+        minSdkVersion 21
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName

lib/pages/scanner_page.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:mobile_scanner/mobile_scanner.dart';
 import 'package:smoke_cess_app/service/settings_service.dart';
 
 class ScannerPage extends StatelessWidget {
@@ -10,7 +11,14 @@ class ScannerPage extends StatelessWidget {
         child: Column(
       mainAxisAlignment: MainAxisAlignment.center,
       children: [
-        const Text('Hier taucht die Kamera zum Scannen auf'),
+        Expanded(child: MobileScanner(fit: BoxFit.contain,onDetect: (capture) {
+          final List<Barcode> barcodes = capture.barcodes;
+          for (final barcode in barcodes) {
+          debugPrint('Barcode found! ${barcode.rawValue}');
+        } },
+
+        ))
+        ,
         const SizedBox(height: 30),
         ElevatedButton(
           style: ElevatedButton.styleFrom(

web/index.html

@@ -14,23 +14,23 @@
     This is a placeholder for base href that will be replaced by the value of
     the `--base-href` argument provided to `flutter build`.
   -->
-  <base href="$FLUTTER_BASE_HREF">
+    <base href="$FLUTTER_BASE_HREF" />
 
-  <meta charset="UTF-8">
-  <meta content="IE=Edge" http-equiv="X-UA-Compatible">
-  <meta name="description" content="A new Flutter project.">
+    <meta charset="UTF-8" />
+    <meta content="IE=Edge" http-equiv="X-UA-Compatible" />
+    <meta name="description" content="A new Flutter project." />
 
     <!-- iOS meta tags & icons -->
-  <meta name="apple-mobile-web-app-capable" content="yes">
-  <meta name="apple-mobile-web-app-status-bar-style" content="black">
-  <meta name="apple-mobile-web-app-title" content="smoke_cess_app">
-  <link rel="apple-touch-icon" href="icons/Icon-192.png">
+    <meta name="apple-mobile-web-app-capable" content="yes" />
+    <meta name="apple-mobile-web-app-status-bar-style" content="black" />
+    <meta name="apple-mobile-web-app-title" content="smoke_cess_app" />
+    <link rel="apple-touch-icon" href="icons/Icon-192.png" />
 
     <!-- Favicon -->
     <link rel="icon" type="image/png" href="favicon.png" />
 
     <title>smoke_cess_app</title>
-  <link rel="manifest" href="manifest.json">
+    <link rel="manifest" href="manifest.json" />
 
     <script>
       // The value below is injected by flutter build, do not touch.
@@ -43,16 +43,20 @@
     <script>
       window.addEventListener('load', function (ev) {
         // Download main.dart.js
-      _flutter.loader.loadEntrypoint({
+        _flutter.loader
+          .loadEntrypoint({
             serviceWorker: {
               serviceWorkerVersion: serviceWorkerVersion,
-        }
-      }).then(function(engineInitializer) {
+            },
+          })
+          .then(function (engineInitializer) {
             return engineInitializer.initializeEngine();
-      }).then(function(appRunner) {
+          })
+          .then(function (appRunner) {
             return appRunner.runApp();
           });
       });
     </script>
+    <script src="https://cdn.jsdelivr.net/npm/jsqr@1.4.0/dist/jsQR.min.js"></script>
   </body>
 </html>