我正在尝试在我的聊天应用程序中创建语音到文本和文本到语音功能，用于制作语音消息。我完全遵循了这份文档https://pub.dev/packages/flutter_tts/example.但我不得不导入另一个名为flaft_tts_web.dart的库。我认为这应该没什么大不了的，但似乎是它导致了大错误。这是堆垛机
../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_tts-1.2.6/lib/flutter_tts_web.dart:2:8: Error: Not found: 'dart:html'
import 'dart:html' as html;
^
../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_tts-1.2.6/lib/flutter_tts_web.dart:3:8: Error: Not found: 'dart:js'
import 'dart:js';
^
../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_tts-1.2.6/lib/flutter_tts_web.dart:31:3: Error: Type 'html.SpeechSynthesis' not found.
html.SpeechSynthesis synth;
^^^^^^^^^^^^^^^^^^^^
../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_tts-1.2.6/lib/flutter_tts_web.dart:32:3: Error: Type 'html.SpeechSynthesisUtterance' not found.
html.SpeechSynthesisUtterance utterance;
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_tts-1.2.6/lib/flutter_tts_web.dart:31:8: Error: 'SpeechSynthesis' isn't a type.
html.SpeechSynthesis synth;
^^^^^^^^^^^^^^^
../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_tts-1.2.6/lib/flutter_tts_web.dart:32:8: Error: 'SpeechSynthesisUtterance' isn't a type.
html.SpeechSynthesisUtterance utterance;
^^^^^^^^^^^^^^^^^^^^^^^^
../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_tts-1.2.6/lib/flutter_tts_web.dart:37:17: Error: Method not found: 'SpeechSynthesisUtterance'.
utterance = html.SpeechSynthesisUtterance();
^^^^^^^^^^^^^^^^^^^^^^^^
../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_tts-1.2.6/lib/flutter_tts_web.dart:38:18: Error: Getter not found: 'window'.
synth = html.window.speechSynthesis;
^^^^^^
../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_tts-1.2.6/lib/flutter_tts_web.dart:156:63: Error: 'JsArray' isn't a type.
context['speechSynthesis'].callMethod('getVoices') as JsArray<dynamic>;
^^^^^^^
../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_tts-1.2.6/lib/flutter_tts_web.dart:156:9: Error: The getter 'context' isn't defined for the class 'FlutterTtsPlugin'.
- 'FlutterTtsPlugin' is from 'package:flutter_tts/flutter_tts_web.dart' ('../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/flutter_tts-1.2.6/lib/flutter_tts_web.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'context'.
context['speechSynthesis'].callMethod('getVoices') as JsArray<dynamic>;
^^^^^^^
/C:/flutter/packages/flutter_web_plugins/lib/src/plugin_registry.dart:29:5: Error: Method not found: 'webOnlySetPluginHandler'.
ui.webOnlySetPluginHandler(_binaryMessenger.handlePlatformMessage);
^^^^^^^^^^^^^^^^^^^^^^^
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_proto
type/standard_file_system.dart:33:7)
#1 asFileUri (package:vm/kernel_front_end.dart:659:37)
#2 writeDepfile (package:vm/kernel_front_end.dart:853:21)
<asynchronous suspension>
#3 FrontendCompiler.compile (package:frontend_server/frontend_server.dart:574:15)
<asynchronous suspension>
#4 _FlutterFrontendCompiler.compile (package:flutter_frontend_server/server.dart:43:22)
#5 starter (package:flutter_frontend_server/server.dart:182:27)
#6 main (file:///C:/b/s/w/ir/cache/builder/src/flutter/flutter_frontend_server/bin/starter.dart:9:30)
#7 _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:299:32)
#8 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)
FAILURE: Build failed with an exception.
* Where:
Script 'C:flutterpackagesflutter_toolsgradleflutter.gradle' line: 896
* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'C:flutterbinflutter.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 1m 38s
Exception: Gradle task assembleDebug failed with exit code 1
我试图删除该文件，但变量TtsState取决于web文件。A.所以尝试了flutter clean并切换到beta chanel。请尽快帮忙，因为这是一场黑客马拉松，我还有8个小时。我会提供任何必要的代码几乎立即
我认为这是因为没有安装dart，请确保您正确安装了dart，并在安装dart后使用以下命令。
pub get