update

lib/functions/barcode_scan_function.dart

@@ -0,0 +1,19 @@
+import 'package:flutter/material.dart';
+import 'package:simple_barcode_scanner/simple_barcode_scanner.dart';
+
+Future<String> barcodeScan(BuildContext context) async {
+  String? barcode = await SimpleBarcodeScanner.scanBarcode(
+    context,
+    // barcodeAppBar: const BarcodeAppBar(
+    //     // appBarTitle: 'Test',
+    //     // centerTitle: false,
+    //     // enableBackButton: false,
+    //     // backButtonIcon: Icon(Icons.arrow_back_ios),
+    //     ),
+    // isShowFlashIcon: true,
+    delayMillis: 2000,
+    scanType: ScanType.barcode,
+    cameraFace: CameraFace.back,
+  );
+  return barcode != '-1' ? barcode ?? '' : '';
+}