如何解决任务'：app：compileFlutterBuildDebug'的执行失败

Question

我试图运行我的 Flutter 应用程序，结果如下：

     Compiler message:
lib/main.dart:1:8: Error: Not found: 'dart:html'
import 'dart:html';
       ^
Invalid depfile: C:\Users\IMBA\AndroidStudioProjects\mi_card_flutter-master\.dart_tool\flutter_build\410385fb4867e1d74565d68665ecb577\kernel_snapshot.d
Invalid depfile: C:\Users\IMBA\AndroidStudioProjects\mi_card_flutter-master\.dart_tool\flutter_build\410385fb4867e1d74565d68665ecb577\kernel_snapshot.d
...
Compiler message:
lib/main.dart:1:8: Error: Not found: 'dart:html'
import 'dart:html';
       ^
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:567:37)
#2      writeDepfile (package:vm/kernel_front_end.dart:760:21)
<asynchronous suspension>
#3      FrontendCompiler.compile (package:frontend_server/frontend_server.dart:536:15)
<asynchronous suspension>
#4      _FlutterFrontendCompiler.compile (package:flutter_frontend_server/server.dart:40:22)
#5      starter (package:flutter_frontend_server/server.dart:178:27)
#6      main (file:///C:/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:299:32)
#8      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)

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

FAILURE: Build failed with an exception.

* Where:
Script 'C:\Users\IMBA\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 882

* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'C:\Users\IMBA\flutter\bin\flutter.bat'' 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 16s
Exception: Gradle task assembleDebug failed with exit code 1

在我使用问题部分中的 --scan 标志后，出现了其他问题。

 java.lang.ClassNotFoundException: com.google.wireless.android.sdk.stats.IntellijIndexingStats$Index
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at com.intellij.util.indexing.counters.IndexCounters.<clinit>(IndexCounters.java:34)
    at com.intellij.util.indexing.impl.MapReduceIndex.<init>(MapReduceIndex.java:94)
    at com.intellij.util.indexing.impl.MapReduceIndex.<init>(MapReduceIndex.java:110)
    at org.jetbrains.jps.backwardRefs.index.CompilerReferenceIndex$CompilerMapReduceIndex.<init>(CompilerReferenceIndex.java:248)
    at org.jetbrains.jps.backwardRefs.index.CompilerReferenceIndex.<init>(CompilerReferenceIndex.java:84)
    at org.jetbrains.jps.backwardRefs.JavaCompilerBackwardReferenceIndex.<init>(JavaCompilerBackwardReferenceIndex.java:12)
    at org.jetbrains.jps.backwardRefs.JavaBackwardReferenceIndexWriter.initialize(JavaBackwardReferenceIndexWriter.java:80)
    at org.jetbrains.jps.incremental.java.JavaBuilder.buildStarted(JavaBuilder.java:149)
    at org.jetbrains.jps.incremental.IncProjectBuilder.runBuild(IncProjectBuilder.java:359)
    at org.jetbrains.jps.incremental.IncProjectBuilder.build(IncProjectBuilder.java:178)
    at org.jetbrains.jps.cmdline.BuildRunner.runBuild(BuildRunner.java:139)
    at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:288)
    at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:121)
    at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler.lambda$channelRead0$0(BuildMain.java:228)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

我从 appbrewery Flutter 课程中获取了这个 Flutter 应用程序的所有材料。这发生在我尝试制作 MIcard 项目时。有解决这个问题的想法吗？

原文由 Vidya Marin 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

转到 pubspec.yaml 文件，尝试执行 Packages get | Pub get ，然后再次构建项目。

原文由 ANUP SAJJAN 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 2

我最终使问题过于复杂，因为它是我创建的 Assets/Fonts 文件夹中的一种字体，并且它在 pubspec.yaml 中的规范不正确。

我有：

 - asset: Fonts/my_font.ttf

我需要：

 - asset: Assets/Fonts/my_font.ttf

原文由 Jalen Paul 发布，翻译遵循 CC BY-SA 4.0 许可协议