Revert "remove obsolete example"

This reverts commit 6957e103.

+import 'package:flutter/material.dart';
+import 'package:mobile_scanner/mobile_scanner.dart';
+
+class BarcodeScannerWithoutController extends StatefulWidget {
+  const BarcodeScannerWithoutController({Key? key}) : super(key: key);
+
+  @override
+  _BarcodeScannerWithoutControllerState createState() =>
+      _BarcodeScannerWithoutControllerState();
+}
+
+class _BarcodeScannerWithoutControllerState
+    extends State<BarcodeScannerWithoutController>
+    with SingleTickerProviderStateMixin {
+  BarcodeCapture? capture;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: Colors.black,
+      body: Builder(
+        builder: (context) {
+          return Stack(
+            children: [
+              MobileScanner(
+                fit: BoxFit.contain,
+                onDetect: (capture) {
+                  setState(() {
+                    this.capture = capture;
+                  });
+                },
+              ),
+              Align(
+                alignment: Alignment.bottomCenter,
+                child: Container(
+                  alignment: Alignment.bottomCenter,
+                  height: 100,
+                  color: Colors.black.withOpacity(0.4),
+                  child: Row(
+                    mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+                    children: [
+                      Center(
+                        child: SizedBox(
+                          width: MediaQuery.of(context).size.width - 120,
+                          height: 50,
+                          child: FittedBox(
+                            child: Text(
+                              capture?.barcodes.first.rawValue ??
+                                  'Scan something!',
+                              overflow: TextOverflow.fade,
+                              style: Theme.of(context)
+                                  .textTheme
+                                  .headline4!
+                                  .copyWith(color: Colors.white),
+                            ),
+                          ),
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+              ),
+            ],
+          );
+        },
+      ),
+    );
+  }
+}

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:mobile_scanner_example/barcode_list_scanner_controller.dart';
 import 'package:mobile_scanner_example/barcode_scanner_controller.dart';
 import 'package:mobile_scanner_example/barcode_scanner_returning_image.dart';
+import 'package:mobile_scanner_example/barcode_scanner_without_controller.dart';
 
 void main() => runApp(const MaterialApp(home: MyHome()));
 
@@ -50,6 +51,17 @@ class MyHome extends StatelessWidget {
               child:
                   const Text('MobileScanner with Controller (returning image)'),
             ),
+            ElevatedButton(
+              onPressed: () {
+                Navigator.of(context).push(
+                  MaterialPageRoute(
+                    builder: (context) =>
+                        const BarcodeScannerWithoutController(),
+                  ),
+                );
+              },
+              child: const Text('MobileScanner without Controller'),
+            ),
           ],
         ),
       ),