การสร้างรายการเลื่อนได้ด้วย 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.

Pass a fixed set of children. Good for short, known lists.

ListTile is a ready-made row with leading icon, title, subtitle, and trailing widget, perfect for menus and settings.

A plain ListView builds every child up front. For hundreds of items this wastes memory and slows startup. We need lazy building.

ListView.builder creates items on demand as they scroll into view, so only visible rows exist in memory.

itemCount tells Flutter how many rows exist; itemBuilder is called with each index to build that row. Omitting itemCount makes an infinite list.

ListView.separated inserts a divider widget between items, keeping spacing consistent.

Set scrollDirection: Axis.horizontal to scroll sideways, useful for carousels and chip rows.

A ListView wants unbounded height, which conflicts with a Column. Wrap it in Expanded to give it the remaining space.

Make rows interactive with onTap on a ListTile or by wrapping items in GestureDetector/InkWell.

Use ListView.builder for performance, ListTile for clean rows, separated for dividers, and wrap in Expanded inside columns.

You built scrollable lists:

• ListView for short fixed lists
• ListView.builder for efficient long lists
• ListTile rows and separated dividers
• Wrap in Expanded inside a Column