/// <summary>
        /// 去应用市场app详情页
        /// </summary>
        /// <param name="marketPkg">应用市场的包名</param>
        public void appDetail(string marketPkg)
        {
            try
            {
                Android.Net.Uri uri = Android.Net.Uri.Parse("market://detail?id="+PackageName);
                Intent intent = new Intent(Intent.ActionView,uri);
                if (string.IsNullOrEmpty(marketPkg))
                    intent.SetPackage(marketPkg);
                intent.AddFlags(ActivityFlags.NewTask);
                StartActivity(intent);
            }
            catch(Exception ex) {
                AlertUtil.ToastShort(this,ex.ToString());
            }
        }