A widget that has a collapsible app bar.
Add dependency in your pubspec.yaml:
dependencies:
collapsible_app_bar: ^0.1.4Run flutter pub get to install the package.
To use this widget, you need to specify expendedHeight property which is the app bar's height when expanded, and the body widget which can be any widget you want to put under the app bar, it will scroll as the app bar collapse.
CollapsibleAppBar(
shrinkTitle: 'Page Title',
expandedHeight: 250,
body: const Center(child: Text('body')),
)For more detail, please go check the example.

