GroupListView package for Flutter.

A ListView that allows you to group list items and support headers like iOS UITableView section.

Features

List Items can be grouped.
Support headers for each group.
All fields from ListView.builder constructor available.

Getting Started

Add the package to your pubspec.yaml:

group_list_view: ^1.0.6

In your dart file, import the library:

import 'package:group_list_view/group_list_view.dart';

Instead of using a ListView create a GroupListView Widget:

 Map<String, List> _elements = {
   'Team A': ['Klay Lewis', 'Ehsan Woodard', 'River Bains'],
   'Team B': ['Toyah Downs', 'Tyla Kane'],
 };
 
 GroupListView(
   sectionsCount: _elements.keys.toList().length,
   countOfItemInSection: (int section) {
     return _elements.values.toList()[section].length;
   },
   itemBuilder: (BuildContext context, IndexPath index) {
     return Text(
       _elements.values.toList()[index.section][index.index],
       style: TextStyle(color: Colors.white, fontSize: 18),
     );
   },
   groupHeaderBuilder: (BuildContext context, int section) {
     return Padding(
       padding: const EdgeInsets.symmetric(horizontal: 15, vertical: 8),
       child: Text(
         _elements.keys.toList()[section],
         style: TextStyle(fontSize: 18, fontWeight: FontWeight.w600),
       ),
     );
   },
   separatorBuilder: (context, index) => SizedBox(height: 10),
   sectionSeparatorBuilder: (context, section) => SizedBox(height: 10),
 );

Parameters:

sectionsCount: The number of sections in the ListView. (required)
countOfItemInSection. Function which returns the number of items(rows) in a specified section. (required)
itemBuilder: Function which returns an Widget which defines the item at the specified IndexPath. itemBuilder provides the current section and index. (required)

  Widget _itemBuilder(BuildContext context, IndexPath index) {
     return Text('${_elements[index.section][index.index]}');
  }

groupHeaderBuilder: Function which returns an Widget which defines the section header for each group. (required)
separatorBuilder: Function which returns an Widget which defines the divider/separator at the specified IndexPath.

The itemBuilder and separatorBuilder callbacks should actually create widget instances when called.