当我运行任何使用dart的命令时,响应总是如下所示; building flutter tool...
Running Pub upgrade...The current Dart SDK version is 2.10.0-0.0.dev.flutter-9dca49e71e.Because flutter_tools depends on collection >=1.15.0-nnbd <1.15.0-nullsafety.2 which requires SDK
在使用type 'bool' is not a subtype of type 'double'内部的ListView.builder时,我得到了错误的ExpansionTile。我能够看到扩展块,但是当我单击扩展瓷砖时,我得到了前面提到的错误。
这是屏幕截图,它在扩展列表时抛出错误-下面是我的全部代码和错误日志。",
"Windows2"
[ERROR:flutter/lib/ui/ui_dart_state.cc(198)] Unhandled Exception: PlatformException(position, the positionargument can not be null, null, null)
#0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dar
我之前的Flutter版本是在C:\src\flutter中安装的。当我尝试升级Flutter时,我得到这个错误:Rename-Item : Access to the path 'C:\src\flutter\bin\cache\dart-sdk' is denied.At C:\src\flutter\bin\
我试过在windows上安装flutter的试驾,就像这里的https://flutter.dev/docs/get-started/test-drive 默认应用程序生成了工作,但是当我尝试在https(undefined_function at [flutter_app007] lib\main.dart:3)
error: 'MaterialApp' isn't a