小编Med*_*dCh的帖子

将 FLutter 升级到3.0.0后，我在使用computeisolate时收到此错误，因为我知道我已经在main.dart中初始化了：

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

我正在使用flutter_downloader包通过我的应用程序下载文件。进度通知效果很好。但我的ReceivePort没有监听进度。

  final ReceivePort port = ReceivePort();

     @override
  void initState() {
    super.initState();

     IsolateNameServer.registerPortWithName(
        port.sendPort, 'downloader_sendport');

     port.listen((dynamic data) async {
       log('data: $data');  // don't work

     });
     FlutterDownloader.registerCallback(downloadCallback);
   }


@pragma('vm:entry-point')
  static void downloadCallback(
      String id, DownloadTaskStatus status, int progress) {
    log("downloadCallback => $id, $status, $progress"); // works

    final SendPort? send =
        IsolateNameServer.lookupPortByName('downloader_sendport');

   

    send?.send([id, status, progress]);
  }