自习室优化ok

lib/pages/student/room/viewmodel/stu_room_vm.dart

@@ -1,7 +1,7 @@
 import 'dart:async';
 
 import 'package:agora_rtc_engine/agora_rtc_engine.dart';
-import 'package:app/config/config.dart';
+import 'package:app/global/config.dart';
 import 'package:app/data/models/meeting_room_dto.dart';
 import 'package:app/request/dto/room/room_list_item_dto.dart';
 import 'package:app/request/dto/room/room_info_dto.dart';
@@ -138,8 +138,9 @@ class StuRoomVM extends ChangeNotifier {
 
   ///学生人员变化事件，（如加入、退出、掉线）
   void onStudentChange(List<RoomUserDto> list) {
+    final lineList = list.where((t) => t.online == 1);
     List<RoomUserDto> newList = [];
-    for (var t in list) {
+    for (var t in lineList) {
       //设置老师
       if (t.userType == 2) {
         teacherInfo = t;