Flutter-Android Studio和Flutter更新后Dart失败

问题描述

我有一个正在运行的项目，没有任何问题，并且由于我更新到 Android Studio 3.5.3 和 Flutter 1.13.1-pre。 99•频道主，当试图在真实设备上运行时，同一项目会产生巨大错误。

I had a project that was running without issues and, since I updated to Android Studio 3.5.3 and Flutter 1.13.1-pre.99 • channel master, the same project gives a huge error when trying to run on real device.

我在这里提到的是Android Studio和Flutter更新，因为我不知道是哪个（如果有）引起了问题。

I am mentioning here Android Studio and Flutter updates because I am not sur which of them (if any) is causing the problems.

在我看来， flutter_web是个问题 ...但我仍然不确定如何卸载flutter_web本身。

It looks to me like a problem with flutter_web that I installed some time ago...but still Im not sure how to uninstall flutter_web itself.

注意：当前项目不是一个颤抖的网络项目

这里是完整的错误...（对大文本表示抱歉）：

Here the complete error...(sorry for the huge text):

Invalid depfile: /Users/user458395/Desktop/flutterProjects/testProjectX/.dart_tool/flutter_build/0732b8ad26463ce096dc3cab1564707e/kernel_snapshot.d
Invalid depfile: /Users/user458395/Desktop/flutterProjects/testProjectX/.dart_tool/flutter_build/0732b8ad26463ce096dc3cab1564707e/kernel_snapshot.d

Compiler message:
lib/routes/search_results_route.dart:1:8: Error: Not found: 'dart:html'
import 'dart:html';
       ^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:6:8: Error: Not found: 'dart:html'
import 'dart:html';
       ^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:97:25: Error: Type 'HttpRequest' not found.
  void _openHttpRequest(HttpRequest request, String method, String url,
                        ^^^^^^^^^^^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:32:25: Error: 'HttpRequest' isn't a type.
  final _xhrs = new Set<HttpRequest>();
                        ^^^^^^^^^^^
../../../Downloads/flutterSdk/flutter/packages/flutter/lib/src/painting/_network_image_web.dart:64:12: Error: Method not found: 'webOnlyInstantiateImageCodecFromUrl'.
    return ui.webOnlyInstantiateImageCodecFromUrl(resolved) as Future<ui.Codec>; // ignore: undefined_function
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:46:19: Error: Method not found: 'HttpRequest'.
    var xhr = new HttpRequest();
                  ^^^^^^^^^^^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:57:45: Error: Method not found: 'Blob'.
      var blob = xhr.response == null ? new Blob([]) : xhr.response;
                                            ^^^^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:58:24: Error: Method not found: 'FileReader'.
      var reader = new FileReader();
                       ^^^^^^^^^^
../../../Downloads/flutterSdk/flutter/.pub-cache/hosted/pub.dartlang.org/http-0.12.0+2/lib/src/browser_client.dart:97:25: Error: 'HttpRequest' isn't a type.
  void _openHttpRequest(HttpRequest request, String method, String url,
                        ^^^^^^^^^^^
Unhandled exception:
FileSystemException(uri=org-dartlang-untranslatable-uri:dart%3Ahtml; message=StandardFileSystem only supports file:* and data:* URIs)
#0      StandardFileSystem.entityForUri (package:front_end/src/api_prototype/standard_file_system.dart:33:7)
#1      asFileUri (package:vm/kernel_front_end.dart:604:37)
#2      writeDepfile (package:vm/kernel_front_end.dart:799:21)
<asynchronous suspension>
#3      FrontendCompiler.compile (package:frontend_server/frontend_server.dart:472:15)
<asynchronous suspension>
#4      _FlutterFrontendCompiler.compile (package:flutter_frontend_server/server.dart:38:22)
#5      starter (package:flutter_frontend_server/server.dart:149:27)
#6      main (file:///b/s/w/ir/cache/builder/src/flutter/flutter_frontend_server/bin/starter.dart:8:30)
#7      _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:305:32)
#8      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:174:12)

Target kernel_snapshot failed: Exception: Errors during snapshot creation: null
build failed.

FAILURE: Build failed with an exception.

* Where:
Script '/Users/user458395/Downloads/flutterSdk/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 792

* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command '/Users/user458395/Downloads/flutterSdk/flutter/bin/flutter'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 36s
Finished with error: Gradle task assembleDebug failed with exit code 1




推荐答案

EDIT ：可以通过在终端中运行此命令从此问题切换回稳定通道。

EDIT: to get rid from this issue switch back to stable channel by running this command in the terminal.

flutter channel stable

此后运行 flutter升级。

请通过此命令检查详细错误

Please check detailed error by this command

flutter run --debug

此外，

因此，如果它不是Web项目，则查找并删除 dart：html 。

So if its not a web project then Find and remove dart:html.

这篇关于Flutter-Android Studio和Flutter更新后Dart失败的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！