public async void OnEnteredNewActivity(string activityName) { var item = new ActivityItem() { Name = activityName, RecentlyDate = DateTime.Now }; var resItem = await mSqlite.AddActivityAsync(item); if (resItem != null) { mListAdapter.Add(resItem); ToastManager.ShowLongTime(Activity, Resource.String.toast_success_added_activity); } else { ToastManager.ShowLongTime(Activity, Resource.String.toast_failed_add_activity); } }