Xamarin Forms 条形码扫描器

Question

Xamarin Forms 条形码扫描器

xamarinxamarin.formszxingbarcode-scanner

20

我找不到任何可以使用的 Xamarin Forms 条码扫描器的源代码。是否有使用 zxing 库的可用于 Xamarin Forms 的条码扫描器示例？

- Aneesh.A.M

4个回答

4

你可以使用 ZXing.Net.Mobile.Forms。但是要注意。

ZXing.Net.Mobile.Forms current version is 2.4.1. I used this version and build failed on Xamarin.Forms.Android project. => Crash App.

=> I used version 2.3.2. It working fine.

In Android project file MainActivity.cs, you add following code:

public override void OnRequestPermissionsResult(int requestCode, string[] permissions, Permission[] grantResults)
{
    global::ZXing.Net.Mobile.Forms.Android.PermissionsHandler.OnRequestPermissionsResult(requestCode, permissions, grantResults);
}

It seems, the tutorial code on here is incorrect

Call scanner:

private async void BtnScan_OnClicked(object sender, EventArgs e)
{
    ZXingScannerPage scanPage = new ZXingScannerPage();
    scanPage.OnScanResult += (result) =>
    {
        scanPage.IsScanning = false;
        Device.BeginInvokeOnMainThread(() =>
        {
            Navigation.PopAsync();
            EtInputCode.Text = "Code: " + result.Text;
        });
    };
    await Navigation.PushAsync(scanPage);
}

- Bình Nguyễn Quang

安装 ZXing.Net.Mobile 而不仅仅是 ZXing.Net.Mobile.Forms 可以修复 v2.4.1 的构建错误。 - dvjanm

4

您可以使用 ZXing.Net.Mobile nuget。该库可在以下 URL 的 github 上获得：https://github.com/Redth/ZXing.Net.Mobile。您将在第一页找到使用文档。但是我将简要地用以下3个步骤来解释它：

Add the nuget to your project
Create a ContentPage. In the xaml side, create a button or an image button. In the following exemple, I'm using like an image button like this :
```
<ImageButton  x:Name="ScanButton"  Source="scannimage.png"  />
```

In the code bind, put the following code in the constructor or in the OnAppearing() method:

ScanButton.Clicked += async (sender, e) =>
{
    var scanner = new ZXing.Mobile.MobileBarcodeScanner();
    var result = await scanner.Scan();

    if (result != null)
    {
        await DisplayAlert("Code barre", "Scanned Barcode: " + result.Text, "Ok");
    }
};

- Masta

1

这很简单，

var scanner = new MobileBarcodeScanner();
var result = await scanner.Scan();

if(result == null) 
   return;

results.Text = result.Text;

这是一个使用XZing库扫描条形码和二维码的XamarinForms工作示例。

示例代码：https://github.com/hnabbasi/CheckInator 演示视频：https://www.youtube.com/watch?v=OdPinaBLbvE

- hnabbasi

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- Akash Amin · Accepted Answer

您可以尝试使用下面的代码。 将zxing库/组件添加到解决方案中的所有项目

public class Home : ContentPage
{
    string message = "";
    public Home()
    {
        //Intialize the button
        Button btnScan = new Button
        {
            Text = "Start Scan",
            BackgroundColor = Color.FromRgb(207, 197, 159),
            TextColor = Color.White,
            BorderRadius = 5,
            TranslationY = 120
        };
        //Attach the click event
        btnScan.Clicked += btnScan_Clicked;

        this.Content = new StackLayout
        {
            BackgroundColor = Color.FromRgb(150, 172, 135),
            Spacing = 10,
            Padding = 25,
            Children =
            {
                btnScan
            }
        };
    }

    async void btnScan_Clicked(object sender, EventArgs e)
    {
        var scanner = new MobileBarcodeScanner();
        scanner.TopText = "Hold the camera up to the barcode\nAbout 6 inches away";
        scanner.BottomText = "Wait for the barcode to automatically scan!";

        //This will start scanning
        ZXing.Result result = await scanner.Scan();

        //Show the result returned.
        HandleResult(result);
    }

    void HandleResult(ZXing.Result result)
    {
        var msg = "No Barcode!";
        if (result != null)
        {
            msg = "Barcode: " + result.Text + " (" + result.BarcodeFormat + ")";
        }

        DisplayAlert("", msg, "Ok");
    }
}