sticky_and_expandable_list

Flutter implementation of sticky headers and expandable list.Support use it in a CustomScrollView.

sticky_and_expandable_list

Features

  • Support build an expandable ListView, which can expand/collapse section group or pin section header.
  • Use it with CustomScrollView、SliverAppBar.
  • Listen the scroll offset of current sticky header,
    and current sticky header index.

Getting Started

In the pubspec.yaml of your flutter project, add the following dependency:

dependencies:
  sticky_and_expandable_list: '^0.1.0'

Basic Usage

    //sectionList is a custom data source for ExpandableListView.
    //echo Section class must implement ExpandableListSection.
    List<Section> sectionList = MockData.getExampleSections();
    return ExpandableListView(
      builder: SliverExpandableChildDelegate<String, Section>(
          sectionList: sectionList,
          headerBuilder: (context, section, index) => Text("Header #$index"),
          itemBuilder: (context, section, item, index) => ListTile(
                leading: CircleAvatar(
                  child: Text("$index"),
                ),
                title: Text(item),
              )),
    );

Detail Examples

FAQ

How to expand/collapse item?

section.setSectionExpanded(true)

Example

How to listen current sticky header or the sticky header scroll offset?

  @override
  Widget build(BuildContext context) {
    ExpandableListView(
      builder: SliverExpandableChildDelegate<String, Section>(
        headerController: _getHeaderController(),
      ),
    )
  }

  _getHeaderController() {
    var controller = ExpandableListHeaderController();
    controller.addListener(() {
      print("switchingSectionIndex:${controller.switchingSectionIndex}, stickySectionIndex:" +
          "${controller.stickySectionIndex},scrollPercent:${controller.percent}");
    });
    return controller;
  }

GitHub

https://github.com/tp7309/flutter_sticky_and_expandable_list