protected override async void OnElementChanged(ElementChangedEventArgs <ZXingScannerView> e)
{
base.OnElementChanged(e);
formsView = Element;
if (zxingSurface == null)
{
finishedSetup = new TaskCompletionSource <bool> ();
// We'll proxy our requests through an intermediate layer that can intercept
// the scanning so it can ask for permission
intermediaryScanner = new IntermediaryScanner {
Parent = this
};
formsView.InternalNativeScannerImplementation = intermediaryScanner;
var activity = Context as Activity;
if (activity != null)
{
await PermissionsHandler.RequestPermissions(activity);
}
zxingSurface = new ZXingSurfaceView(Xamarin.Forms.Forms.Context as Activity);
zxingSurface.LayoutParameters = new LayoutParams(LayoutParams.MatchParent, LayoutParams.MatchParent);
base.SetNativeControl(zxingSurface);
finishedSetup.TrySetResult(true);
}
}
protected override async void OnElementChanged(ElementChangedEventArgs <ZXingScannerView> e)
{
base.OnElementChanged(e);
formsView = Element;
if (zxingSurface == null)
{
// Process requests for autofocus
formsView.AutoFocusRequested += (x, y) => {
if (zxingSurface != null)
{
if (x < 0 && y < 0)
{
zxingSurface.AutoFocus();
}
else
{
zxingSurface.AutoFocus(x, y);
}
}
};
var activity = Context as Activity;
if (activity != null)
{
await PermissionsHandler.RequestPermissions(activity);
}
zxingSurface = new ZXingSurfaceView(Xamarin.Forms.Forms.Context as Activity, formsView.Options);
zxingSurface.LayoutParameters = new LayoutParams(LayoutParams.MatchParent, LayoutParams.MatchParent);
base.SetNativeControl(zxingSurface);
if (formsView.IsScanning)
{
zxingSurface.StartScanning(formsView.RaiseScanResult, formsView.Options);
}
if (!formsView.IsAnalyzing)
{
zxingSurface.PauseAnalysis();
}
if (formsView.IsTorchOn)
{
zxingSurface.Torch(true);
}
}
}
/*
* string path = (string)Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DataDirectory.ToString());
* string pathpackage;
* string pathtxt;
*/
public override void OnRequestPermissionsResult(int requestCode, string[] permissions, Permission[] grantResults)
{
PermissionsHandler.OnRequestPermissionsResult(requestCode, permissions, grantResults);
}