public void ShowContextMenu(Xamarin.Forms.View viewRoot, Dictionary <string, Action> menuItems)
{
this.menuItems = menuItems;
menu = new PopupMenu(Xamarin.Forms.Forms.Context, viewRoot.GetNativeView());
menu.Gravity = Views.GravityFlags.Right;
foreach (var item in menuItems)
{
menu.Menu.Add(new Java.Lang.String(item.Key));
}
menu.MenuItemClick += MenuClicked;
menu.Show();
}