Xamarin.Android。访问条形码扫描仪

using Android.App;
using Android.Content.PM;
using Android.Hardware;
using Android.OS;
using Android.Widget;
using ZXing.Mobile;

namespace BarcodeScannerApp
{
    [Activity(Label = "Barcode Scanner", MainLauncher = true, Icon = "@drawable/icon", ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
    public class MainActivity : Activity
    {
        private MobileBarcodeScanner _scanner;

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            SetContentView(Resource.Layout.Main);

            var scanButton = FindViewById<Button>(Resource.Id.scan_button);
            scanButton.Click += async (sender, e) => await ScanBarcodeAsync();
        }

        private async Task ScanBarcodeAsync()
        {
            var options = new MobileBarcodeScanningOptions
            {
                PossibleFormats = new[] { ZXing.BarcodeFormat.ALL_FORMATS }
            };

            _scanner = new MobileBarcodeScanner(this);
            var result = await _scanner.Scan(options);

            if (result != null)
            {
                // Handle the scanned barcode
                Toast.MakeText(this, "Scanned Barcode: " + result.Text, ToastLength.Long).Show();
            }
            else
            {
                Toast.MakeText(this, "Scan Cancelled!", ToastLength.Long).Show();
            }
        }
    }
}