public void Init() { string appID = _context.GetString(Resource.String.agora_app_id); _myRtmClientListener = new RtmClientListener(); _myRtmClientListener.MessageReceived += OnRtmMessageReceived; _myRtmClientListener.StateChanged += OnStateChanged; try { _rtmClient = RtmClient.CreateInstance(_context, appID, _myRtmClientListener); #if DEBUG _rtmClient.SetParameters("{\"rtm.log_filter\": 65535}"); #endif } catch (Exception e) { throw new Exception($"NEED TO check rtm sdk init fatal error\n {e.StackTrace}"); } _callManager = _rtmClient.RtmCallManager; _callManager.RemoteInvitationReceived += RemoteInvitationReceived; _callManager.RemoteInvitationFailure += RemoteInvitationFailure; _callManager.LocalInvitationReceivedByPeer += LocalInvitationReceivedByPeer; _callManager.RemoteInvitationAccepted += RemoteInvitationAccepted; _callManager.RemoteInvitationRefused += RemoteInvitationRefused; _callManager.LocalInvitationRefused += LocalInvitationRefused; _callManager.LocalInvitationAccepted += LocalInvitationAccepted; }