IBitmap Windows Phone 8.1 memory issues

[reactiveui]

IBitmap Windows Phone 8.1 memory issues

[promontis]

Using a value converter which gets the bitmap from akavache, convert it to a stream and set it as a source, seems to work :) yeay!!! Took me 5 days to figure this out!

The stream/bytes seems to be only referenced by the listviewitem (not the viewmodel) and thus when UI virtualization removes that listviewitem, it disposes the stream/bytes! Memory is stable now

 public class SplatBitmapConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, string language)
        {
            if (value == null)
            {
                return null;
            }

            var bitmap = new BitmapImage();

            BlobCache.LocalMachine.LoadImageFromUrl((string)value).Subscribe(picture =>
            {
                CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(
                    CoreDispatcherPriority.Normal, async () =>
                    {
                        var stream = new MemoryStream();
                        await picture.Save(CompressedBitmapFormat.Jpeg, 1.0f, stream);
                        stream.Seek(0, SeekOrigin.Begin);
                        await bitmap.SetSourceAsync(WindowsRuntimeStreamExtensions.AsRandomAccessStream(stream));
                    });

            });

            return bitmap;
        }

        public object ConvertBack(object value, Type targetType, object parameter, string language)
        {
            throw new NotSupportedException();
        }
    }

[anaisbetts]

@promontis Cool, glad it works!