在 Flutter SDK 升级到 2.0 或者更高的版本 , 运行时会发现不少三方插件会报错 . 

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Error: Cannot run with sound null safety, because the following dependencies
don't support null safety:

 - package:loading_indicator_view
 - package:flutter_swiper
 - package:flutter_page_indicator
 - package:transformer_page_view

For solutions, see https://dart.dev/go/unsound-null-safety


FAILURE: Build failed with an exception.

也就是说以上有些包不支持 Safety 模式 .

解决方案: --no-sound-null-safety

  • run
    flutter run --no-sound-null-safety
  • build
    flutter build apk --no-sound-null-safety