Rows With Separators

Part of the Lists and Screens section of Coddy's Flutter journey. Lesson 8 of 33.

A long list reads better with a line between the rows. With a builder you cannot write the Dividers by hand, so there is a second kind of builder list that adds them for you:

ListView.separated(
  itemCount: songs.length,
  itemBuilder: (context, index) {
    return ListTile(title: Text(songs[index]));
  },
  separatorBuilder: (context, index) {
    return const Divider();
  },
)

separatorBuilder is called for every gap between two rows and returns the widget that goes there. A list of 15 rows gets 14 separators, and there is never one after the last row.

The separator can be any widget: a Divider, or a SizedBox for plain space.

Challenge

Easy

Change the playlist to a ListView.separated with a Divider between every two songs.

Try it yourself

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    final List<String> songs = [
      'Morning Light',
      'Paper Planes',
      'City Rain',
      'Slow River',
      'Neon Nights',
      'Golden Hour',
      'Northern Wind',
      'Blue Harbor',
      'Quiet Storm',
      'Summer Static',
      'Echo Valley',
      'Last Train',
      'Silver Lines',
      'Open Road',
      'Starfall',
    ];
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        appBar: AppBar(title: const Text('Playlist')),
        body: ListView.builder(
          itemCount: songs.length,
          itemBuilder: (context, index) {
            return ListTile(title: Text(songs[index]));
          },
        ),
      ),
    );
  }
}