Flutter APK在运行构建APK命令时出错

Question

我有一个flutter应用程序，它在调试模式下运行良好，但当我为android apk运行flutter build apk命令时，它显示以下错误。错误是无法在健全的null安全性下运行。错误：

C:UsersRAILOflutterbinflutter.bat --no-color build apk
Building with sound null safety 
Running Gradle task 'assembleRelease'...                        
Error: Cannot run with sound null safety, because the following dependencies
don't support null safety:
- 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.

Answer 1

在main.dart 顶部添加此行

//@dart=2.9

然后运行$flutter clean&amp；flutter pub获取

Answer 2

您也可以尝试此命令。

flutter build apk --release --no-sound-null-safety