Question

我在Xamarin.Forms应用程序中使用ZXing.Net.Mobile ZXingScannerView。目前我的目标是Android API 21+和Windows Mobile 10.我通过IsScanning属性启用/禁用扫描程序。虽然它适用于仿真器和真实设备上的UWP应用，但对于Android来说却不是这样。在Android模拟器和真实设备上，设置IsScanning = true不会重新启用相机流。

我正在使用与此示例类似的代码：

SomePage.xaml

<ContentPage.Content>
    ...
    <StackLayout>
        <zxing:ZXingScannerView
            x:Name="zxing"
            Result="{Binding ScannerResult, Mode=TwoWay}"
            IsScanning="{Binding ScannerScanning}"
            ScanResultCommand="{Binding ScannedCommand}"/>
        <Button Text="ON" Command="{Binding ScannerOnCommand}"  />
        <Button Text="OFF" Command="{Binding ScannerOffCommand}"  />
    ...
    </StackLayout>
</ContentPage.Content>

SomeViewModel.cs

public class SomeViewModel
{
    ....
    public bool ScannerScanning { get; set; }
    public Result ScannerResult { get; set; }

    public ICommand ScannedCommand => new Command(() => ExecuteScannedCommand());
    public ICommand ScannerOnCommand => new Command(() => ExecuteScannerOnCommand());
    public ICommand ScannerOffCommand => new Command(() => ExecuteScannerOffCommand());

    private async Task ExecuteScannedCommand()
    {
        Debug.WriteLine();
    }

    private void ExecuteScannerOnCommand()
    {
        ScannerScanning = true;
    }

    private void ExecuteScannerOffCommand()
    {
        ScannerScanning = false;
    }
    ...
}

我想念什么，或者是ZXing.Net.Mobile中的错误？

ZXing.Net.Mobile扫描程序视图无法在Xamarin.Forms中重新用于Android

0 个答案: