private async Task LoadGroupChatAsync(string offset = "0") { if (MainScrollEvent.IsLoading) { return; } MainScrollEvent.IsLoading = true; var countList = MAdapter.LastChatsList.Count; var(apiStatus, respond) = await RequestsAsync.GroupChat.GetGroupChatListAsync("20", offset); if (apiStatus.Equals(200)) { if (respond is GroupListObject result) { var respondList = result.Data.Count; if (respondList > 0) { foreach (var chatObject in from chatObject in result.Data let check = MAdapter?.LastChatsList.FirstOrDefault(a => a.LastChat?.GroupId == chatObject.GroupId) where check == null select chatObject) { chatObject.ChatType = "group"; var item = WoWonderTools.FilterDataLastChatNewV(chatObject); MAdapter?.LastChatsList.Add(new Classes.LastChatsClass() { LastChat = item, Type = Classes.ItemType.LastChatNewV }); } if (countList > 0) { Activity?.RunOnUiThread(() => { MAdapter.NotifyItemRangeInserted(countList, MAdapter.LastChatsList.Count - countList); }); } else { Activity?.RunOnUiThread(() => { MAdapter.NotifyDataSetChanged(); }); } } else { if (MAdapter?.LastChatsList.Count > 10 && !MRecycler.CanScrollVertically(1)) { Toast.MakeText(Context, Context.GetText(Resource.String.Lbl_NoMoreGroup), ToastLength.Short)?.Show(); } } } } else { Methods.DisplayReportResult(Activity, respond); } Activity?.RunOnUiThread(ShowEmptyPage); }