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This is a library of widget that can be used to listen for child widgets those are being displayed in the scroll view.

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You do not need to change the view you are currently using, just wrap a ViewObserver around the view to achieve the following features.

• Observing child widgets those are being displayed in ScrollView
• Support for scrolling to a specific item in ScrollView
• Quickly implement the chat session page effect
• Support for keeping IM message position when inserting or updating messages, avoiding jitter.

• ListView
• SliverList
• GridView
• SliverGrid
• Mixing usage of SliverPersistentHeader, SliverList and SliverGrid
• ScrollView built by third-party package.

🏞 Related Example

Add scrollview_observer to your pubspec.yaml file:

dependencies:
  scrollview_observer: latest_version

Import scrollview_observer in files that it will be used:

import 'package:scrollview_observer/scrollview_observer.dart';

• Wiki Home
• 1、Observing child widgets those are being displayed in the scroll view
• 2、Scrolling to the specified index location
• 3、Chat Observer

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