public override Task <IImageSourceServiceResult?> LoadDrawableAsync(IImageSource imageSource, Android.Widget.ImageView imageView, CancellationToken cancellationToken = default)
{
var fontImageSource = (IFontImageSource)imageSource;
if (!fontImageSource.IsEmpty)
{
var size = FontManager.GetFontSize(fontImageSource.Font);
var unit = fontImageSource.Font.AutoScalingEnabled ? ComplexUnitType.Sp : ComplexUnitType.Dip;
var textSize = TypedValue.ApplyDimension(unit, size.Value, imageView.Context?.Resources?.DisplayMetrics);
var typeface = FontManager.GetTypeface(fontImageSource.Font);
var color = (fontImageSource.Color ?? Graphics.Colors.White).ToPlatform();
var callback = new ImageLoaderCallback();
try
{
PlatformInterop.LoadImageFromFont(
imageView,
color,
fontImageSource.Glyph,
typeface,
textSize,
callback);
return(callback.Result);
}
catch (Exception ex)
{
Logger?.LogWarning(ex, "Unable to generate font image '{Glyph}'.", fontImageSource.Glyph);
throw;
}
}
return(Task.FromResult <IImageSourceServiceResult?>(null));
}
public override Task <IImageSourceServiceResult?> LoadDrawableAsync(IImageSource imageSource, Android.Widget.ImageView imageView, CancellationToken cancellationToken = default)
{
var fileImageSource = (IFileImageSource)imageSource;
if (!fileImageSource.IsEmpty)
{
var callback = new ImageLoaderCallback();
try
{
var id = imageView.Context?.GetDrawableId(fileImageSource.File) ?? -1;
if (id > 0)
{
imageView.SetImageResource(id);
return(Task.FromResult <IImageSourceServiceResult?>(new ImageSourceServiceLoadResult()));
}
else
{
PlatformInterop.LoadImageFromFile(imageView, fileImageSource.File, callback);
}
return(callback.Result);
}
catch (Exception ex)
{
Logger?.LogWarning(ex, "Unable to load image file '{File}'.", fileImageSource.File);
throw;
}
}
return(Task.FromResult <IImageSourceServiceResult?>(null));
}
public override Task <IImageSourceServiceResult?> LoadDrawableAsync(IImageSource imageSource, Android.Widget.ImageView imageView, CancellationToken cancellationToken = default)
{
var uriImageSource = (IUriImageSource)imageSource;
if (!uriImageSource.IsEmpty)
{
try
{
var callback = new ImageLoaderCallback();
PlatformInterop.LoadImageFromUri(imageView, uriImageSource.Uri.OriginalString, new Java.Lang.Boolean(uriImageSource.CachingEnabled), callback);
return(callback.Result);
}
catch (Exception ex)
{
Logger?.LogWarning(ex, "Unable to load image uri '{Uri}'.", uriImageSource.Uri.OriginalString);
throw;
}
}
return(Task.FromResult <IImageSourceServiceResult?>(null));
}
public override async Task <IImageSourceServiceResult?> LoadDrawableAsync(IImageSource imageSource, Android.Widget.ImageView imageView, CancellationToken cancellationToken = default)
{
var streamImageSource = (IStreamImageSource)imageSource;
if (!streamImageSource.IsEmpty)
{
Stream?stream = null;
try
{
stream = await streamImageSource.GetStreamAsync(cancellationToken).ConfigureAwait(false);
var callback = new ImageLoaderCallback();
PlatformInterop.LoadImageFromStream(imageView, stream, callback);
var result = await callback.Result;
stream?.Dispose();
return(result);
}
catch (Exception ex)
{
Logger?.LogWarning(ex, "Unable to load image stream.");
throw;
}
finally
{
if (stream != null)
{
GC.KeepAlive(stream);
}
}
}
return(null);
}
