notiXamarin8.txt

// En MainActivity.cs 

 [Activity(Label = "NotiXamarin_ensayo", Icon = "@drawable/icon", ParentActivity = typeof(NewsListActivity))]
    public class MainActivity : Activity
    {
        internal static string KEY_ID = "KEY_ID";

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.Main);

            // var id = Intent.Extras.GetInt(KEY_ID);

            PrepareActionBar();


            var newsService = new NewsService();
            var news = newsService.GetNewsById(1);

            var newsImageExample = GetDrawable(Resource.Drawable.Icon);

            var newsTitle = FindViewById<TextView>(Resource.Id.newsTitle);
            var newsBody = FindViewById<TextView>(Resource.Id.newsBody);
            var newsImage = FindViewById<ImageView>(Resource.Id.newsImage);

            var display = WindowManager.DefaultDisplay;
            Android.Graphics.Point point = new Android.Graphics.Point();
            display.GetSize(point);

            var imageURL = string.Concat(ValuesService.ImagesBaseURL, news.ImageName);

            Picasso.With(ApplicationContext)
                .Load(imageURL)
                .Resize(point.X, 0)
                .Into(newsImage);

            newsTitle.Text = news.Title;
            newsBody.Text = news.Body;
        }

        private void PrepareActionBar()
        {
            ActionBar.SetDisplayHomeAsUpEnabled(true);
        }
    }