登录后allGroups为空,请问要怎么做才能获取该用户的allgroups

EMGroupManager.getInstance().asyncGetGroupsFromServer(new EMValueCallBack<List<EMGroup>>() { @Override public void onSuccess(List<EMGroup> value) { // TODO Auto-generated method stub grouplist.addAll(value); } @Override public void onError(int error, String errorMsg) { // TODO Auto-generated method stub System.out.println("error"); } });
返回出错，说连不上服务器