public override async void OnScrolled(RecyclerView recyclerView, int dx, int dy)
{
base.OnScrolled(recyclerView, dx, dy);
var linearLayoutManager = (LinearLayoutManager)recyclerView.GetLayoutManager();
var totalItemCount = linearLayoutManager.ItemCount;
var lastVisibleItem = linearLayoutManager.FindLastVisibleItemPosition();
if (!_isBusy && totalItemCount <= (lastVisibleItem + VisibleThreshold))
{
_isBusy = true;
await _onScrolled.RunAsync();
_isBusy = false;
}
}
private async Task <IList <ChatMessageModel> > TryLoadLatestMessagesAsync(
string chatId,
string oldestMessageId,
DateTimeOffset oldestMessageDate)
{
var messages = default(IList <ChatMessageModel>);
try
{
var query = new MessagesQuery
{
ChannelId = chatId,
FromId = oldestMessageId,
FromDateTime = oldestMessageDate
};
messages = await _getMessagesAsync.RunAsync(query).ConfigureAwait(false);
}
catch (Exception ex)
{
_logger.Error(ex);
}
return(messages);
}