flutter android emulator 连接服务协议报错：无法连接到http://127.0.0.1:56237/5LMSAYhIdSY=/答案

【问题标题】：flutter android emulator Error connecting to the service protocol: failed to connect to http://127.0.0.1:56237/5LMSAYhIdSY=/flutter android emulator 连接服务协议报错：无法连接到http://127.0.0.1:56237/5LMSAYhIdSY=/
【发布时间】：2020-09-14 11:19:01
【问题描述】：

我知道存在这样的问题，但我尝试了所有解决方案，但没有一个是有帮助的。我尝试运行在 ios 上运行的颤振应用程序，但在 android 模拟器上它不起作用，我在 VS 代码和像素 3 API 28 模拟器上开发它，命令“flutter run -v”的输出是：

> Error connecting to the service protocol: failed to connect to http://127.0.0.1:56237/5LMSAYhIdSY=/
> 
>    throwToolExit (package:flutter_tools/src/base/common.dart:14:3)
     RunCommand.runCommand (package:flutter_tools/src/commands/run.dart:569:7)
asynchronous suspension
    FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:723:18)
     _rootRunUnary (dart:async/zone.dart:1192:38)
      _CustomZone.runUnary (dart:async/zone.dart:1085:19)
      _FutureListener.handleValue (dart:async/future_impl.dart:141:18)
      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:682:45)
      Future._propagateToListeners (dart:async/future_impl.dart:711:32)
      Future._completeWithValue (dart:async/future_impl.dart:526:5)
      _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:36:15)
     _completeOnAsyncReturn (dart:async-patch/async_patch.dart:298:13)
     RunCommand.usageValues (package:flutter_tools/src/commands/run.dart)
     _rootRunUnary (dart:async/zone.dart:1192:38)
     _CustomZone.runUnary (dart:async/zone.dart:1085:19)
     _FutureListener.handleValue (dart:async/future_impl.dart:141:18)
     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:682:45)
     Future._propagateToListeners (dart:async/future_impl.dart:711:32)
     Future._completeWithValue (dart:async/future_impl.dart:526:5)
     _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:36:15)
     _completeOnAsyncReturn (dart:async-patch/async_patch.dart:298:13)
     AndroidDevice.isLocalEmulator (package:flutter_tools/src/android/android_device.dart)
     _rootRunUnary (dart:async/zone.dart:1192:38)
     _CustomZone.runUnary (dart:async/zone.dart:1085:19)
     _FutureListener.handleValue (dart:async/future_impl.dart:141:18)
     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:682:45)
     Future._propagateToListeners (dart:async/future_impl.dart:711:32)
     Future._completeWithValue (dart:async/future_impl.dart:526:5)
     Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:556:7)
     _rootRun (dart:async/zone.dart:1184:13)
     _CustomZone.run (dart:async/zone.dart:1077:19)
     _CustomZone.runGuarded (dart:async/zone.dart:979:7)
     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1019:23)
     _microtaskLoop (dart:async/schedule_microtask.dart:43:21)
     _startMicrotaskLoop (dart:async/schedule_microtask.dart:52:5)
     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:118:13)
     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:169:5)

扑医生：

[√] Flutter (Channel stable, v1.17.1, on Microsoft Windows [Version 10.0.14393], locale en-US)

[√] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
[!] Android Studio (version 3.6)
    X Flutter plugin not installed; this adds Flutter specific functionality.
    X Dart plugin not installed; this adds Dart specific functionality.
[!] IntelliJ IDEA Ultimate Edition (version 2018.1)
    X Flutter plugin not installed; this adds Flutter specific functionality.
    X Dart plugin not installed; this adds Dart specific functionality.
[√] VS Code (version 1.29.1)
[√] Connected device (1 available)

【问题讨论】：

你试过运行flutter run --enable-software-rendering吗？我觉得你的模拟器不支持硬件渲染或者你的电脑显卡有问题，所以你可以把你的AVD配置改成software rendering。

标签： android flutter visual-studio-code

【解决方案1】：

运行flutter emulators 以显示可用设备列表。如果您仍然无法连接到现有设备，对于 Android 模拟器，您可以在虚拟设备列表中选择 Wipe Data 来重置设备。之后，再次尝试运行模拟器。

【讨论】：