新学 Flutter，请教个问题

想写一个功能，对服务器进行每 5 秒 1 次请求，如果达到最大尝试次数，就跳转到屏保页面，现在遇到个问题，就是在我更改了全局变量后，终端依旧会对之前的全局配置进行错误请求。

@override void initState() { super.initState(); setState(() { if (Global.serverAddress == "") { Global.serverAddress = "127.0.0.1"; Global.serverPort = "80"; } this.host = Global.serverAddress + ":" + Global.serverPort; print("++++++++++++++++++++++++++++++++++++++++++++"); print(this.host); }); timer = Timer.periodic(Duration(seconds: 5), (Timer t) => get()); } get() async { var full = "http://" + this.host + "/data.json"; var url = Uri.parse(full); var respOnse= await http.get(url); Map data = json.decode(response.body); setState(() { wrongTry++; setComputeState(data); }); } 

当我从其他页面把配置改成"192.168.100.156"后，虽然画面渲染是 OK 的，但是后台还是不停的对之前的错误地址 127.0.0.1 进行重试，这是什么原因呢？

I/flutter ( 5764): ++++++++++++++++++++++++++++++++++++++++++++ I/flutter ( 5764): 192.168.100.156:8085 E/flutter ( 5764): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: SocketException: OS Error: Connection refused, errno = 111, address = 127.0.0.1, port = 51088 E/flutter ( 5764): E/flutter ( 5764): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: SocketException: OS Error: Connection refused, errno = 111, address = 127.0.0.1, port = 51092 E/flutter ( 5764): E/flutter ( 5764): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: SocketException: OS Error: Connection refused, errno = 111, address = 127.0.0.1, port = 51096 E/flutter ( 5764): E/flutter ( 5764): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: SocketException: OS Error: Connection refused, errno = 111, address = 127.0.0.1, port = 51100