使用 ListView 构建可滚动列表
使用 ListView、ListView.builder 和项目分隔符，在 Flutter 中高效显示可滚动集合。
使用 ListView 构建可滚动列表 是 CoddyKit 上的免费 Flutter Mobile Development 课时。 这是第 4 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 Flutter Mobile Development 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Flutter Mobile Development 课程共包含 4 节课。
本课时的部分内容尚未翻译，以英文显示。
Why ListView?
Most apps show lists: messages, products, feeds. A ListView arranges its children in a scrollable column, handling overflow automatically when content exceeds the screen.
A Simple ListView
Pass a fixed set of children. Good for short, known lists.
ListView(
children: [
Text("Apple"),
Text("Banana"),
Text("Cherry"),
],
)ListTile for Rows
ListTile is a ready-made row with leading icon, title, subtitle, and trailing widget, perfect for menus and settings.
ListTile(
leading: Icon(Icons.person),
title: Text("Ada Lovelace"),
subtitle: Text("Mathematician"),
trailing: Icon(Icons.chevron_right),
)The Problem with Long Lists
A plain ListView builds every child up front. For hundreds of items this wastes memory and slows startup. We need lazy building.
ListView.builder
ListView.builder creates items on demand as they scroll into view, so only visible rows exist in memory.
ListView.builder(
itemCount: items.length,
itemBuilder: (context, index) {
return ListTile(title: Text(items[index]));
},
)itemCount and itemBuilder
itemCount tells Flutter how many rows exist; itemBuilder is called with each index to build that row. Omitting itemCount makes an infinite list.
Adding Separators
ListView.separated inserts a divider widget between items, keeping spacing consistent.
ListView.separated(
itemCount: items.length,
itemBuilder: (c, i) => ListTile(title: Text(items[i])),
separatorBuilder: (c, i) => Divider(),
)Horizontal Lists
Set scrollDirection: Axis.horizontal to scroll sideways, useful for carousels and chip rows.
ListView.builder(
scrollDirection: Axis.horizontal,
itemCount: tags.length,
itemBuilder: (c, i) => Chip(label: Text(tags[i])),
)Lists Inside Columns
A ListView wants unbounded height, which conflicts with a Column. Wrap it in Expanded to give it the remaining space.
Column(
children: [
Text("Header"),
Expanded(
child: ListView.builder(...),
),
],
)Handling Taps
Make rows interactive with onTap on a ListTile or by wrapping items in GestureDetector/InkWell.
ListTile(
title: Text(items[index]),
onTap: () => print("Tapped " + items[index]),
)Putting It Together
Use ListView.builder for performance, ListTile for clean rows, separated for dividers, and wrap in Expanded inside columns.
Quick Check
Test your understanding of Flutter lists.
Recap
You built scrollable lists:
ListViewfor short fixed listsListView.builderfor efficient long listsListTilerows andseparateddividers- Wrap in
Expandedinside aColumn
常见问题解答
「使用 ListView 构建可滚动列表」课时是免费的吗？
是的 — 「使用 ListView 构建可滚动列表」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Flutter Mobile Development 课程的其余内容，请升级到 CoddyKit PRO。 Flutter Mobile Development 课程共包含 4 节课。
「使用 ListView 构建可滚动列表」这节课中我会学到什么？
使用 ListView、ListView.builder 和项目分隔符，在 Flutter 中高效显示可滚动集合。 你通过在浏览器中直接运行的动手代码来练习 Flutter Mobile Development，全天候 AI 导师会在你学习这节课的过程中回答你的问题。
学习 Flutter Mobile Development 需要有经验吗？
无需任何先前经验。CoddyKit 上的 Flutter Mobile Development 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 4 节课，共 4 节。
「使用 ListView 构建可滚动列表」课时需要多长时间？
大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。
我能在这节 Flutter Mobile Development 课中编写并运行代码吗？
能。每节 Flutter Mobile Development 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。