static async Task UpdateBitmap(
this AImageView imageView,
IImageElement newView,
IImageElement previousView,
ImageSource newImageSource,
ImageSource previousImageSource)
{
IImageController imageController = newView as IImageController;
newImageSource = newImageSource ?? newView?.Source;
previousImageSource = previousImageSource ?? previousView?.Source;
if (imageView.IsDisposed())
{
return;
}
if (newImageSource != null && Equals(previousImageSource, newImageSource))
{
return;
}
imageController?.SetIsLoading(true);
(imageView as IImageRendererController)?.SkipInvalidate();
imageView.Reset();
imageView.SetImageResource(global::Android.Resource.Color.Transparent);
try
{
if (newImageSource != null)
{
// all this animation code will go away if/once we pull in GlideX
IFormsAnimationDrawable animation = null;
if (imageController != null && imageController.GetLoadAsAnimation())
{
var animationHandler = Registrar.Registered.GetHandlerForObject <IAnimationSourceHandler>(newImageSource);
if (animationHandler != null)
{
animation = await animationHandler.LoadImageAnimationAsync(newImageSource, imageView.Context);
}
}
if (animation == null)
{
var imageViewHandler = Registrar.Registered.GetHandlerForObject <IImageViewHandler>(newImageSource);
if (imageViewHandler != null)
{
await imageViewHandler.LoadImageAsync(newImageSource, imageView);
}
else
{
using (var drawable = await imageView.Context.GetFormsDrawableAsync(newImageSource))
{
// only set the image if we are still on the same one
if (!imageView.IsDisposed() && SourceIsNotChanged(newView, newImageSource))
{
imageView.SetImageDrawable(drawable);
}
}
}
}
else
{
if (!imageView.IsDisposed() && SourceIsNotChanged(newView, newImageSource))
{
imageView.SetImageDrawable(animation.ImageDrawable);
}
else
{
animation?.Reset();
animation?.Dispose();
}
}
}
else
{
imageView.SetImageBitmap(null);
}
}
finally
{
// only mark as finished if we are still working on the same image
if (SourceIsNotChanged(newView, newImageSource))
{
imageController?.SetIsLoading(false);
imageController?.PlatformSizeChanged();
}
}
bool SourceIsNotChanged(IImageElement imageElement, ImageSource imageSource)
{
return((imageElement != null) ? imageElement.Source == imageSource : true);
}
}