I have a flutter app and its working fine in debug mode but when i run flutter build apk command for android apk it shows the following error.
The error is cannot run with sound null safety.
Error:
C:\Users\RAILO\flutter\bin\flutter.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.
>Solution :
Add this line on top of main.dart
// @dart=2.9
then run $flutter clean && flutter pub get