Non-nullable instance field '_state' must be initialized.
I try to keep your code here, and then just make relevant adjustments for NullSafety, maybe you can refer to it.
Adjustment of bidirectional_scroll_view.dart
Adjustment of main.dart
If you need it, I can also provide PullRequest.
Non-nullable instance field '_state' must be initialized.
I try to keep your code here, and then just make relevant adjustments for NullSafety, maybe you can refer to it.
Adjustment of bidirectional_scroll_view.dart
Adjustment of main.dart
If you need it, I can also provide PullRequest.