UserScrollNotification in flutter

NotificationListener<ScrollNotification>(
  onNotification: (ScrollNotification notification) {
    if (notification is UserScrollNotification) {
      if (notification.direction == ScrollDirection.forward) {
        // Handle scroll down.
      } else if (notification.direction == ScrollDirection.reverse) {
        // Handle scroll up.
      }
    }

    // Returning null (or false) to
    // "allow the notification to continue to be dispatched to further ancestors".
    return null;
  },
  child: ListView(..), // Or whatever scroll view you use.
)

Source: stackoverflow.com

Similar codes

2 votes140 views1 answer
How to make checkbox shape to circular using flutter
Dart
0 vote153 views2 answers
Evaluation of this constant expression throws an exception.
Dart
24 votes269 views6 answers
Flutter color hex
Dart
0 vote131 views1 answer
Flutter iconData
Dart
1 vote147 views3 answers
Flutter only on debug mode
Dart
0 vote137 views1 answer
Dart if object==null
Dart
0 vote92 views1 answer
Sliverappbar with tabbar flutter
Dart
2 votes136 views1 answer
Containskey dart
Dart
0 vote141 views1 answer
Flutter print type
Dart
2 votes141 views1 answer
Image fit flutter
Dart