我遇到了同样的问题。解决方法是在单次扫描上循环。因此，您仍然可以继续使用flutter_barcode_scanner包：）。
在我的情况下，我不需要调用setState或类似的东西来更新UI，但如果需要，您可以这样做。

Future<String?> _scanBarcodeNormal() async {
    String? barcodeScanRes;
    // Platform messages may fail, so we use a try/catch PlatformException.
    try {
      barcodeScanRes = await FlutterBarcodeScanner.scanBarcode('#ff6666', 'Cancel', true, ScanMode.BARCODE);
    } on PlatformException {
      barcodeScanRes = 'Failed to get platform version.';
    }
    return barcodeScanRes;
  }

void _scanBarCodeListAndFetchData() async{
    String? barcode = await _scanBarcodeNormal();
    final List<String> barcodeList = [];
    // continue scanning
    while(barcode != null){
      if(barcode == "-1"){ // cancel button -> -1
          barcode = null;
      }
      // add the barcode
      else {
        // avoid duplicates
        if(!barcodeList.contains(barcode)){
          barcodeList.add(barcode);
        }
        // you can also call setState(() {....} here
        if (barcodeList.length == 10) {
            barcode = null; // out !
        }
        else{ // next scan
            barcode = await _scanBarcodeNormal();
        }
      }
    }

    if(barcodeList.isEmpty) {
      UiUtils.showToast(message: "No barcode scanned, abort", toastLength: Toast.LENGTH_SHORT);
    }
    else{
      UiUtils.showToast(message: "${barcodeList.length} barcodes scanned", toastLength: Toast.LENGTH_SHORT);
      // your work
    }
  }