private async Task RefreshCircleInfo() { if (string.IsNullOrEmpty(CircleId)) { return; } Circle = await DataRequester.RequestCircleInfo(CircleId); if (Circle == null) { return; } Title = Circle.Name; if (string.IsNullOrEmpty(Circle.Image)) { Circle.Image = Circle.Thumbnail; } Circle.Adjust(); JoinCircleButtonIcon = Circle.Status == 1 ? _checkIcon : _addIcon; Notify("Circle"); }