async void FfImage_Finish(object sender, CachedImageEvents.FinishEventArgs e)
{
ffImage.Finish -= FfImage_Finish;
var asBytes = await ffImage.GetImageAsJpgAsync(90, 480, 480);
var asStream = new MemoryStream(asBytes);
exportedImage.Source = Xamarin.Forms.ImageSource.FromStream(() => asStream);
asBytes = null;
}
public StreamPage()
{
Title = "Stream with custom key test";
var cachedImage = new CachedImage()
{
HeightRequest = 300,
WidthRequest = 300,
HorizontalOptions = LayoutOptions.Center,
VerticalOptions = LayoutOptions.Center,
};
var button = new Button()
{
Text = "Load again, but as stream",
Command = new Command(async() => {
var bytes = await cachedImage.GetImageAsJpgAsync();
cachedImage.Source = null;
var streamSource = new StreamImageSource()
{
Stream = new Func <CancellationToken, Task <Stream> >((arg) => Task.FromResult <Stream>(new MemoryStream(bytes)))
};
cachedImage.CacheKeyFactory = new CustomCacheKeyFactory();
cachedImage.Source = streamSource;
})
};
Content = new StackLayout()
{
HorizontalOptions = LayoutOptions.FillAndExpand,
Children =
{
cachedImage,
button
}
};
// First we load an image from http source
cachedImage.Source = "http://loremflickr.com/600/600/nature?filename=stream.jpg";
}
public GetImageTestPage()
{
Title = "GetImage Test Page";
var img = new CachedImage
{
Source = "http://i.imgur.com/6ZUYWDE.jpg",
LoadingPlaceholder = "placeholder.jpg",
};
_copiedImageJpg = new CachedImage
{
LoadingPlaceholder = "placeholder.jpg"
};
_copiedImagePng = new CachedImage
{
LoadingPlaceholder = "placeholder.jpg"
};
img.Finish += OnFinish;
_copyJPG = new Button()
{
Text = "Copy as JPG", IsEnabled = false
};
_copyPNG = new Button()
{
Text = "Copy as PNG", IsEnabled = false
};
_copyJPG.Clicked += async(s, e) =>
{
var data = await img.GetImageAsJpgAsync();
_copiedImageJpg.Source = ImageSource.FromStream(() => {
return(new MemoryStream(data));
});
};
_copyPNG.Clicked += async(s, e) =>
{
var data = await img.GetImageAsPngAsync();
_copiedImagePng.Source = ImageSource.FromStream(() => {
return(new MemoryStream(data));
});
};
Content = new ScrollView
{
Content = new StackLayout
{
VerticalOptions = LayoutOptions.FillAndExpand,
HorizontalOptions = LayoutOptions.FillAndExpand,
Children =
{
img,
_copyJPG,
_copyPNG,
_copiedImageJpg,
_copiedImagePng
}
}
};
}