flutterdartlistviewdrag-and-dropreorderable-list

How to create space between ListTiles in Flutter ReorderableListView


I have a ReorderableListView who looks like this :

enter image description here

And I would like it to have space between his ListTile like in the ListView.separated below :

enter image description here

The problem is that I don't want to use ListView.separated because you can't drag and drop ListTiles with it.

Update Solution found :

I used Varun's answer below of wrapping my ListTile in a Column, but instead of using a SizedBox I used a Container to be able to change the color of the space from white to my background color:

Container(
          height: 5.0,
          color: MyColors.myBackgroundColor
        )

Solution

  • Wrap your ListTile in a column and use SizedBox to separate list items. Use key in column, not inside ListTile.

    import 'package:flutter/material.dart';
    
    void main() => runApp(const MyApp());
    
    class MyApp extends StatelessWidget {
      const MyApp({Key? key}) : super(key: key);
    
      static const String _title = 'Flutter Code Sample';
    
      @override
      Widget build(BuildContext context) {
        return MaterialApp(
          title: _title,
          home: Scaffold(
            appBar: AppBar(title: const Text(_title)),
            body: const MyStatefulWidget(),
          ),
        );
      }
    }
    
    class MyStatefulWidget extends StatefulWidget {
      const MyStatefulWidget({Key? key}) : super(key: key);
    
      @override
      State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
    }
    
    class _MyStatefulWidgetState extends State<MyStatefulWidget> {
      final List<int> _items = List<int>.generate(50, (int index) => index);
    
      @override
      Widget build(BuildContext context) {
        final ColorScheme colorScheme = Theme.of(context).colorScheme;
        final Color oddItemColor = colorScheme.primary.withOpacity(0.05);
        final Color evenItemColor = colorScheme.primary.withOpacity(0.15);
    
        return ReorderableListView(
          padding: const EdgeInsets.symmetric(horizontal: 40),
          children: <Widget>[
            for (int index = 0; index < _items.length; index++)
              Column(
                key: Key('$index'),
                children: [
                  ListTile(
                    tileColor: _items[index].isOdd ? oddItemColor : evenItemColor,
                    title: Text('Item ${_items[index]}'),
                  ),
                  SizedBox(
                    height: 5,
                  ),
                ],
              ),
          ],
          onReorder: (int oldIndex, int newIndex) {
            setState(() {
              if (oldIndex < newIndex) {
                newIndex -= 1;
              }
              final int item = _items.removeAt(oldIndex);
              _items.insert(newIndex, item);
            });
          },
        );
      }
    }