Current scroll offset inside a Flutter ListView, SliverList,etc

Question

How do I get the current scroll offset inside a Flutter ListView, SliverList, etc?

Answer 1

• If you're inside the scroll view use Scrollable.of(context).position.pixels.
• If you're outside, you probably want to hand a ScrollController in as the controller argument of the scroll view, then you can read controller.offset.
• Alternatively, use scroll notifications with NotificationListener.

This was asked on Flutter Gitter, and answered: https://gitter.im/flutter/flutter?at=591243f18a05641b1167be0e