Flutter 編譯報錯 Error: The method DioHttpHeaders.add has fewer named arguments than those Context

1.報錯問題：最近更新Android Studio 4.0 連同Flutter 一起更新，導致原有項目運行報錯：

Error: The method 'DioHttpHeaders.add' has fewer named arguments than those
Context: This is the overridden method ('add'). void add(String name, Object value,...

 

解決方法：打開pubspec.yaml 文件修改 dio 版本號，更行爲最新版本（鼠標指向版本號時，會提示最新的版本號）完美解決;

​

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.3  更新一下最新版本
  #添加網絡請求庫
  dio: ^3.0.9 更新一下最新版本
​