我正在尝试在我的聊天应用程序中添加语音消息的文字转语音和语音转文字功能。我完全按照这份文档进行操作：https://pub.dev/packages/flutter_tts/example。但是我不得不导入另一个名为flutter_tts_web.dart的库。我认为这不会成为一个大问题，但它似乎引起了一个错误。以下是堆栈跟踪信息：
../../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:\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 896
* What went wrong:
Execution failed for task ':app:compileFlutterBuildDebug'.
> Process 'command 'C:\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 1m 38s
Exception: Gradle task assembleDebug failed with exit code 1
我试图删除这个文件，但变量Tts State依赖于网络文件。我也尝试过flutter clean和切换到beta通道。请尽快帮助我，因为这是一个黑客马拉松比赛，我只剩下8个小时了。我几乎可以立即提供任何必要的代码。