text
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for example, visually lifts the Card further from the
|
surface and causes the shadow to become more dispersed.
|
For a list of supported elevation values, see Elevation in the
|
Material guidelines.
|
Specifying an unsupported value disables the drop shadow entirely.<topic_end>
|
<topic_start>Summary (Card)
|
<topic_end>
|
<topic_start>Examples (Card)
|
A Card containing 3 ListTiles and sized by wrapping
|
it with a SizedBox. A Divider separates the first
|
and second ListTiles.App source: card_and_stackA Card containing an image and text.Dart code:
|
cards_demo.dart
|
<code_start>Widget _buildCard() {
|
return SizedBox(
|
height: 210,
|
child: Card(
|
child: Column(
|
children: [
|
ListTile(
|
title: const Text(
|
'1625 Main Street',
|
style: TextStyle(fontWeight: FontWeight.w500),
|
),
|
subtitle: const Text('My City, CA 99984'),
|
leading: Icon(
|
Icons.restaurant_menu,
|
color: Colors.blue[500],
|
),
|
),
|
const Divider(),
|
ListTile(
|
title: const Text(
|
'(408) 555-1212',
|
style: TextStyle(fontWeight: FontWeight.w500),
|
),
|
leading: Icon(
|
Icons.contact_phone,
|
color: Colors.blue[500],
|
),
|
),
|
ListTile(
|
title: const Text('costa@example.com'),
|
leading: Icon(
|
Icons.contact_mail,
|
color: Colors.blue[500],
|
),
|
),
|
],
|
),
|
),
|
);
|
}<code_end>
|
<topic_end>
|
<topic_start>
|
ListTile
|
Use ListTile, a specialized row widget from the
|
Material library, for an easy way to create a row
|
containing up to 3 lines of text and optional leading
|
and trailing icons. ListTile is most commonly used in
|
Card or ListView, but can be used elsewhere.<topic_end>
|
<topic_start>Summary (ListTile)
|
<topic_end>
|
<topic_start>Examples (ListTile)
|
A Card containing 3 ListTiles.App source: card_and_stackUses ListTile with leading widgets.Dart code:
|
list_demo.dart<topic_end>
|
<topic_start>
|
Constraints
|
To fully understand Flutter’s layout system, you need
|
to learn how Flutter positions and sizes
|
the components in a layout. For more information,
|
see Understanding constraints.<topic_end>
|
<topic_start>
|
Videos
|
The following videos, part of the
|
Flutter in Focus series,
|
explain Stateless and Stateful widgets.Flutter in Focus playlistEach episode of the
|
Widget of the Week series
|
focuses on a widget. Several of them includes layout widgets.Flutter Widget of the Week playlist<topic_end>
|
<topic_start>
|
Other resources
|
The following resources might help when writing layout code.
|
<topic_end>
|
<topic_start>Build a Flutter layout
|
<topic_end>
|
<topic_start>
|
What you’ll learn
|
This tutorial explains how to design and build layouts in Flutter.If you use the example code provided, you can build the following app.Photo by Dino Reichmuth on Unsplash.
|
Text by Switzerland Tourism.To get a better overview of the layout mechanism, start with
|
Flutter’s approach to layout.<topic_end>
|
<topic_start>
|
Diagram the layout
|
In this section, consider what type of user experience you want for
|
your app users.Consider how to position the components of your user interface.
|
A layout consists of the total end result of these positionings.
|
Consider planning your layout to speed up your coding.
|
Using visual cues to know where something goes on screen can be a great help.Use whichever method you prefer, like an interface design tool or a pencil
|
and a sheet of paper. Figure out where you want to place elements on your
|
screen before writing code. It’s the programming version of the adage:
|
“Measure twice, cut once.”Ask these questions to break the layout down to its basic elements.Identify the larger elements. In this example, you arrange the image, title,
|
buttons, and description into a column.Diagram each row.Row 1, the Title section, has three children:
|
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