In order to load an image locally, we can try to use following approach.

private void ShowLocalImage(object obj){    this.LocalImage = this.GetType().Assembly.GetManifestResourceStream("ChangingImageViewAndroid.Core.Assets.icon.png").ToByte();
}

To load an image from a URL, try to use ImageLoaderService. To get more information about how ImageLoaderService works, please check the documentation at http://developer.intersoftpt.com/display/crosslight/Loading+Images+Asynchronously.

The snippet code below shows how to download image from a remote source.

public async void ExecuteDownload(object parameter)
{
    // resolve an instance of ResourceLoaderService
    IImageLoaderService loaderService = this.GetService<IImageLoaderService>();
  
    // connect to the specified URI and wait for the download to complete
    this.ImageData = await loaderService.LoadImageAsync("http://www.intersoftpt.com/webresources/images/crosslight/achieve-spectacular.png");
}

Hope this help.

Edited on August 28, 2014 03:54 AM
Reason: Add sample project.

I created a simple project which shows how to load an image from a remote url and locally. The sample is uploaded in here.

Please let me know your feedback regarding the sample.