此问题已提交至Flutter github问题：https://github.com/flutter/flutter/issues/27450
我在Android Studio中运行和热加载flutter应用程序时遇到了一些麻烦。
当我在Android Studio中运行应用程序时，我一次又一次收到以下消息（3次运行中有2次运行），并且构建失败。
Speaker Recognition我根本无法进行热装工作
Launching lib/main.dart on iPhone XR in debug mode...
Unhandled exception:
Bad state: Future already completed
#0 _AsyncCompleter.complete (dart:async/future_impl.dart:39:31)
#1 _NativeSocket.startConnect.<anonymous closure>.connectNext.<anonymous closure> (dart:io/runtime/binsocket_patch.dart:490:23)
#2 _NativeSocket.issueWriteEvent.issue (dart:io/runtime/binsocket_patch.dart:844:14)
#3 _NativeSocket.issueWriteEvent (dart:io/runtime/binsocket_patch.dart:851:12)
#4 _NativeSocket.multiplex (dart:io/runtime/binsocket_patch.dart:872:11)
#5 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)
我正在稳定频道上工作。这是我扑扑医生的输出：
Performing hot reload...
Syncing files to device iPhone XR...
Unhandled exception:
Bad state: Future already completed
#0 _AsyncCompleter.complete (dart:async/future_impl.dart:39:31)
#1 _NativeSocket.startConnect.<anonymous closure>.connectNext.<anonymous closure> (dart:io/runtime/binsocket_patch.dart:490:23)
#2 _NativeSocket.issueWriteEvent.issue (dart:io/runtime/binsocket_patch.dart:844:14)
#3 _NativeSocket.issueWriteEvent (dart:io/runtime/binsocket_patch.dart:851:12)
#4 _NativeSocket.multiplex (dart:io/runtime/binsocket_patch.dart:872:11)
#5 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)
此刻我正在中国工作，我已经实施了此处提到的更改：https://flutter.io/community/china。这是我的.bash_profile文件的相关部分
[✓] Flutter (Channel stable, v1.0.0, on Mac OS X 10.14.1 18B75, locale en-AU)
• Flutter version 1.0.0 at /Users/rakshak/flutter
• Framework revision 5391447fae (9 weeks ago), 2018-11-29 19:41:26 -0800
• Engine revision 7375a0f414
• Dart version 2.1.0 (build 2.1.0-dev.9.4 f9ebf21297)
⣽Unhandled exception:
Bad state: Future already completed
#0 _AsyncCompleter.complete (dart:async/future_impl.dart:39:31)
#1 _NativeSocket.startConnect.<anonymous closure>.connectNext.<anonymous closure> (dart:io/runtime/binsocket_patch.dart:490:23)
#2 _NativeSocket.issueWriteEvent.issue (dart:io/runtime/binsocket_patch.dart:844:14)
#3 _NativeSocket.issueWriteEvent (dart:io/runtime/binsocket_patch.dart:851:12)
#4 _NativeSocket.multiplex (dart:io/runtime/binsocket_patch.dart:872:11)
#5 _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:171:12)
我正在Mac上工作。
答案 0 :(得分：2)
这看起来像是一个奇怪的建议；但是，您是否在完成此操作时尝试使用vpn？我曾经遇到这个问题，然后使用vpn连接可以帮助我。我想，您可以尝试一下。
答案 1 :(得分：0)
我建议您按照以下步骤重新安装flutter 这个流行的扑扑课程视频。我希望这值得一看 为您服务，您的错误将被删除Flutter Installation Guide 由于您来自中国，因此您必须按照以下步骤添加这些步骤 链接Using Flutter In China
答案 2 :(得分：0)
如果使用代理，请设置环境变量
NO_PROXY=127.0.0.1,localhost
答案 3 :(得分：0)
这似乎是与网络相关的问题。
我对此的解决方法： 我从.bash_profile文件中删除了PUB_HOSTED_URL和FLUTTER_STORAGE_BASE_URL并打开了我的VPN。
您似乎需要一个有效且稳定的Internet连接来构建和热重新加载开发中的flutter应用程序。
相关链接：