我试图在导入intl后运行我的应用程序，但它不起作用。
在pubspec.yaml我的文件中有：
intl: ^0.15.8
经过一番研究后，我以三种方式导入了该包，只是为了确定一下。但似乎只使用了第一个（intl.dart）：
import "package:intl/intl.dart";
import "package:intl/intl_browser.dart"; //unused import
import "package:intl/intl_standalone.dart"; //unused import
我这样使用它：
DateFormat("dd-MM-yyyy").format(_chosenDate)
我之后的错误flutter run是：
Resolving dependencies... 2,3s
Compiler message:
file:///Users/mydomus/Documents/flutter/.pub-cache/hosted/pub.dartlang.org/intl-0.15.8/lib/intl_browser.dart:25:48: Error: Getter not found: 'window'.
Intl.systemLocale = Intl.canonicalizedLocale(window.navigator.language);
^^^^^^
file:///Users/mydomus/Documents/flutter/.pub-cache/hosted/pub.dartlang.org/intl-0.15.8/lib/intl_browser.dart:13:8: 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:589:37)
<asynchronous suspension>
#2 FrontendCompiler._outputDependenciesDelta (package:vm/frontend_server.dart:391:39)
<asynchronous suspension>
#3 FrontendCompiler.compile (package:vm/frontend_server.dart:365:13)
<asynchronous suspension>
#4 _FlutterFrontendCompiler.compile (package:frontend_server/server.dart:31:22)
<asynchronous …