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Westley-6073 asked

Xamarin tabbed page loading with zxing issue

Hi all,
Got any issue with xamarin form, am using prism framework, and got have a tabbed page with 3 tabs, first tab using zxing control to scan barcode.

The problem is that, everytime the tab page load (any tab), the camera seems to be active. I have already implemented IActiveAware, under isactive then will set isscanning and isanalyzing to true, but seems like even I am not in the scan tab page, the camera module still active.

Any help is welcome, thanks

Code below:
ViewModel:
private bool _isAnalyzing = false;
public bool IsAnalyzing
{
get
{
return _isAnalyzing;
}
set
{
if (SetProperty(ref _isAnalyzing, value))
{
//Do something
}
}
}

 private bool _isScanning = false;
 public bool IsScanning
 {
   get
   {
     return _isScanning;
   }
   set
   {
     if (SetProperty(ref _isScanning, value))
     {
          
     }
   }
 }

private bool _isActive;
public bool IsActive
{
get { return _isActive; }
set { SetProperty(ref _isActive, value, RaiseIsActiveChanged); }
}

protected virtual void RaiseIsActiveChanged()
{
IsActiveChanged?.Invoke(this, EventArgs.Empty);
if (IsActive)
{
IsScanning = true;

     IsAnalyzing = true;
     //_isAnalyzing = true;
     //RaisePropertyChanged("IsAnalyzing");
   }
   else
  {
     IsScanning = false;
     IsAnalyzing = false;
   }

 }

xmal:
<zxing:ZXingScannerView x:Name="scanView" IsScanning="{Binding IsScanning}"
IsAnalyzing="{Binding IsAnalyzing}"
Result="{Binding Result, Mode=TwoWay}"
ScanResultCommand="{Binding OnScannedCommand}"
VerticalOptions="CenterAndExpand" HorizontalOptions="CenterAndExpand" />

<zxing:ZXingDefaultOverlay x:Name="scanOverlay"
TopText="Place the red line over the barcode"
ShowFlashButton="False"
Opacity="0.9" />

dotnet-xamarin
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