flutter sdk 版本升级到2.0或者更高的版本后就发现运行时会报错：
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
- 方案一：
通过命令行运行:
- run （debug运行）
flutter run --no-sound-null-safety - build （打包apk）
flutter build apk --no-sound-null-safety
- 方案二:
- 也可以在Android studio中设置运行配置。首先打开Edit Configurations 页面；
截屏2021-08-11 上午12.06.16.png
- 然后在Additional run args 这行键入一下命令:
--no-sound-null-safety
截屏2021-10-24 下午1.05.34.png
