public static void GetMediaStatistics(Action <ObservableCollection <MediaStatistics> > callBack) { mediaStatistics.Clear(); if (null != callManager.CurrentCall) { var errno = WrapperProxy.GetMediaStatistics(callManager.CurrentCall.CallHandle); if (ErrorNumber.OK != errno) { throw new Exception("获取信号流信息失败,errno=" + errno); } mediaStatisticsCallBack = callBack; } else { throw new Exception("当前呼叫为空,获取信号流信息"); } }