[Android] [SkiaRenderer] : getting screen shot using PixelCopy.Request or view.Background.Draw(canvas)?

[baskren]

I'm migrating some old code to Uno 6.2 (SkiaRenderer) and, not being completely familiar with how the SkiaRenderer really manages the VisualTree, have stumbled across something that doesn't seem to be working - taking screen shots (or at least in Android).

I've used two approaches to capturing a screen shot:

• write Background of App's RootView (global::Android.App.Application.Context.Window.DecorView.RootView.Background) to Canvas of Bitmap:

            var view = global::Android.App.Application.Context.Window.DecorView.RootView;
            var bitmap = Bitmap.CreateBitmap(view.Width, view.Height, Bitmap.Config.Argb8888);
            using (var canvas = new Canvas(bitmap))
            {
                var drawable = view.Background;
                if (drawable != null)
                    drawable.Draw(canvas);
                else
                    canvas.DrawColor(Color.White);

                view.Draw(canvas);
            }

• use PixelCopy

            var displayMetrics = new DisplayMetrics();
            activity.WindowManager.DefaultDisplay.GetRealMetrics(displayMetrics);
            var bitmap = Bitmap.CreateBitmap
            (
                displayMetrics.WidthPixels,
                displayMetrics.HeightPixels,
                Bitmap.Config.Argb8888
            );

            if (Build.VERSION.SdkInt < BuildVersionCodes.O)
                throw new Exception("PixelCopy requires API 26+");

            var window = activity.Window;
            var locationInWindow = new int[2];
            window.DecorView.GetLocationInWindow(locationInWindow);
            
            var tcs = new TaskCompletionSource<PixelCopyResult>();
            var handler = new FinishedListener(tcs);
            
            PixelCopy.Request(
                window,
                bitmap,
                handler,
                new Handler(Looper.MainLooper)
            );
            
            await tcs.Task;
            return bitmap;

where:

   class FinishedListener(TaskCompletionSource<PixelCopyResult> completionSource)
        : global::Java.Lang.Object, PixelCopy.IOnPixelCopyFinishedListener
    {
        TaskCompletionSource<PixelCopyResult> CompletionSource = completionSource;

        public void OnPixelCopyFinished(int copyResult) => CompletionSource.SetResult((PixelCopyResult)copyResult);
    }

In both cases, I'm getting a blank Bitmap. Does SkiaRenderer break this approach? Is there a bit of source code in the repo that you can point me to that would help me understand how to hook into the SkiaRenderer to get a bitmap?

Thank you for considering this!