BadgeElement.cs

using System;
using Android.App;
using Android.Content;
using Android.Graphics;
using Android.Graphics.Drawables;
using Android.Views;
using Android.Widget;
using Java.Util;

namespace Android.Dialog
{
    public class BadgeElement : Element, IImageUpdated
    {
        // Height for rows
        const int dimx = 48;
        const int dimy = 44;

        // radius for rounding
        const int roundPx = 12;

        public readonly ImageView Value;
        ImageView scaled;

		string imageUrl = "";
		Uri imageUri = null;

		static ImageLoader badgeIL = null;

        public BadgeElement (ImageView image, string url)
            : base(string.Empty)
		{
			if (badgeIL == null) {
				badgeIL = new ImageLoader (100, 4000000);
			}

			imageUrl = url;
			if (imageUri == null) {
				imageUri = new System.Uri (imageUrl);
			}
            if (image == null)
            {
                Value = MakeEmpty();
                scaled = Value;
            }
            else
            {
                Value = image;
                if (image.Drawable != null)
                    scaled = Scale(Value);
            }
        }

        static ImageView MakeEmpty()
        {
            return new ImageView(null);
        }

        ImageView Scale(ImageView source)
        {
            var drawable = (BitmapDrawable)source.Drawable;
            var bitmap = drawable.Bitmap;
            var bMapScaled = Bitmap.CreateScaledBitmap(bitmap, dimx, dimy, true);
            source.SetImageBitmap(bMapScaled);
            return source;
        }

        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                if (scaled != null)
                    scaled.Dispose();
                if (Value != null)
                    Value.Dispose();
            }
            base.Dispose(disposing);
        }

        public override View GetView (Context context, View convertView, ViewGroup parent)
		{
			Drawable myDrawable;
			if (scaled == null)
				scaled = Scale (Value);

			Click = delegate {
				SelectImage ();
			};

			Android.Dialog.IImageUpdated callback = new ImageLoaderCallback (context, scaled, imageUri);  // ImageLoaderCallback implements IImageUpdated

			myDrawable = badgeIL.RequestImage ((Uri)imageUri, (IImageUpdated)callback);

			if (myDrawable != null) {
				scaled.SetImageDrawable (myDrawable);
			}
//			var bitmap = BitmapFactory.DecodeStream (new Java.Net.URL(imageUrl).OpenStream());
//			scaled.SetImageBitmap(bitmap);

			var view = convertView as RelativeLayout ?? new RelativeLayout (context);

			var parms = new RelativeLayout.LayoutParams (ViewGroup.LayoutParams.WrapContent,
                                                        ViewGroup.LayoutParams.WrapContent);
			parms.SetMargins (5, 2, 5, 2);
			parms.AddRule (LayoutRules.AlignParentLeft);

			scaled.Id = ViewId.getUniqueId();

			// SEC bug fix, not yet submitted to Kenny.  Getting exception "specified view already has a parent"
			if (scaled.Parent != view) {
				view.AddView (scaled, parms);
			}
			TextView tv = new TextView(context);
			tv.Text = "This is a badge";
			view.AddView(tv);
            return view;
        }

        private void SelectImage()
        {

            var activity = (Activity)GetContext();
			Toast.MakeText(activity, "CLICKED", ToastLength.Short);
            var intent = new Intent(Intent.ActionPick, Provider.MediaStore.Images.Media.InternalContentUri);
            activity.StartActivity(intent);
        }

		public void UpdatedImage (System.Uri uri)
		{
			int i =0;

		}

		private class ImageLoaderCallback : IImageUpdated
		{
			int i=0;
			public ImageLoaderCallback(Context context, ImageView iv, Uri imageUri)
			{
				int i=0;
				Drawable newDrawable;
				newDrawable = badgeIL.RequestImage ((Uri)imageUri, null);

			if (newDrawable != null) {
				iv.SetImageDrawable (newDrawable);
			}


			}
			public void UpdatedImage (System.Uri uri)
		{
				int i=0;
		}


		}

   }

}