Flutter ReceiverPort 不监听

Question

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]);
  }

Answer 1

需要SendPort接收一个原始对象 ( int)，而不是一个DownloadTaskStatus对象：

解决方案：调用时更改status为原语：status.valuesend(...)

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