init

android/app/build.gradle

@@ -36,7 +36,7 @@ android {
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.example.deggendorf_app"
-        minSdkVersion flutter.minSdkVersion
+        minSdkVersion 20
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName

lib/bottom_navigation_bar_buttons/event/barwidget.dart

+import 'package:deggendorf_app/bottom_navigation_bar_buttons/event/qr_scanner.dart';
 import 'package:flutter/material.dart';
 import 'package:deggendorf_app/bottom_navigation_bar_buttons/event/imageslides.dart';
 import 'package:deggendorf_app/bottom_navigation_bar_buttons/event/infobox_text.dart';
 
-
 class BarWidget extends StatefulWidget {
-  const BarWidget({Key? key,
-  required this.barName}) : super(key: key);
+  const BarWidget({Key? key, required this.barName}) : super(key: key);
 
   final String barName;
 
@@ -17,26 +16,27 @@ class _BarWidgetState extends State<BarWidget> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      appBar: AppBar(
-        backgroundColor: Colors.green,
-        title: Text(
-          "Bar: ${widget.barName}", style: TextStyle(fontSize: 20, color: Colors.white),
+        appBar: AppBar(
+          backgroundColor: Colors.green,
+          title: Text(
+            "Bar: ${widget.barName}",
+            style: TextStyle(fontSize: 20, color: Colors.white),
+          ),
         ),
-      ),
-      body: Padding(
-        padding: EdgeInsets.all(20),
-        child: Column(
-          children: [
-            ImageSlides(),
-            InfoBox(),
-          ],
-        )
-      ),
-      floatingActionButton: FloatingActionButton(
-        onPressed: null,
-        backgroundColor: Colors.green,
-        child: Icon(Icons.qr_code_scanner),
-      )
-    );
+        body: Padding(
+            padding: EdgeInsets.all(20),
+            child: Column(
+              children: [
+                ImageSlides(),
+                InfoBox(),
+              ],
+            )),
+        floatingActionButton: FloatingActionButton(
+          onPressed: () {
+            QrScanner();
+          },
+          backgroundColor: Colors.green,
+          child: Icon(Icons.qr_code_scanner),
+        ));
   }
-}
\ No newline at end of file
+}

lib/bottom_navigation_bar_buttons/event/qr_scanner.dart

+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+class QrScanner extends StatefulWidget {
+  const QrScanner({Key? key}) : super(key: key);
+
+  @override
+  _QrScannerState createState() => _QrScannerState();
+}
+
+class _QrScannerState extends State {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(body: Container(color: Colors.greenAccent));
+  }
+}

pubspec.lock

@@ -21,7 +21,7 @@ packages:
       name: carousel_slider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.0.0"
+    version: "4.1.1"
   characters:
     dependency: transitive
     description:
@@ -56,7 +56,7 @@ packages:
       name: crypto
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.1"
+    version: "3.0.2"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -77,7 +77,7 @@ packages:
       name: ffi
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.2"
+    version: "1.2.1"
   file:
     dependency: transitive
     description:
@@ -134,7 +134,7 @@ packages:
       name: google_fonts
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.3.1"
+    version: "2.3.3"
   http:
     dependency: "direct main"
     description:
@@ -148,7 +148,7 @@ packages:
       name: http_parser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.0.0"
+    version: "4.0.1"
   js:
     dependency: transitive
     description:
@@ -204,49 +204,49 @@ packages:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.9"
+    version: "2.0.10"
   path_provider_android:
     dependency: transitive
     description:
       name: path_provider_android
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.12"
+    version: "2.0.14"
   path_provider_ios:
     dependency: transitive
     description:
       name: path_provider_ios
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.0.9"
   path_provider_linux:
     dependency: transitive
     description:
       name: path_provider_linux
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.5"
+    version: "2.1.7"
   path_provider_macos:
     dependency: transitive
     description:
       name: path_provider_macos
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.5"
+    version: "2.0.6"
   path_provider_platform_interface:
     dependency: transitive
     description:
       name: path_provider_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.3"
+    version: "2.0.4"
   path_provider_windows:
     dependency: transitive
     description:
       name: path_provider_windows
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.5"
+    version: "2.0.7"
   pedantic:
     dependency: transitive
     description:
@@ -282,41 +282,48 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "5.0.0"
+  qr_code_scanner:
+    dependency: "direct main"
+    description:
+      name: qr_code_scanner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.7.0"
   shared_preferences:
     dependency: "direct main"
     description:
       name: shared_preferences
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.13"
+    version: "2.0.15"
   shared_preferences_android:
     dependency: transitive
     description:
       name: shared_preferences_android
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.11"
+    version: "2.0.12"
   shared_preferences_ios:
     dependency: transitive
     description:
       name: shared_preferences_ios
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   shared_preferences_linux:
     dependency: transitive
     description:
       name: shared_preferences_linux
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   shared_preferences_macos:
     dependency: transitive
     description:
       name: shared_preferences_macos
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.3"
+    version: "2.0.4"
   shared_preferences_platform_interface:
     dependency: transitive
     description:
@@ -330,14 +337,14 @@ packages:
       name: shared_preferences_web
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.3"
+    version: "2.0.4"
   shared_preferences_windows:
     dependency: transitive
     description:
       name: shared_preferences_windows
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -405,7 +412,7 @@ packages:
       name: win32
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.1"
+    version: "2.5.2"
   xdg_directories:
     dependency: transitive
     description:

pubspec.yaml

@@ -40,6 +40,7 @@ dependencies:
   shared_preferences: ^2.0.13
   carousel_slider: ^4.0.0
   flutter_speed_dial: ^4.3.0
+  qr_code_scanner: ^0.7.0
 
 
 dev_dependencies: