ListTile 通常用于在 Flutter 中填充 ListView玲躯。在這篇文章中模聋，我將用可視化的例子來說明所有的參數(shù)场刑。

title

title 參數(shù)可以接受任何小部件般此，但通常是文本小部件

ListTile(
  title: Text('Horse'),
)

title.png

subtitle

副標題是標題下面較小的文本

ListTile(
  title: Text('Horse'),
  subtitle: Text('A strong animal'),
)

subtitle.png

dense

使文本更小，并將所有內(nèi)容打包在一起

ListTile(
  title: Text('Horse'),
  subtitle: Text('A strong animal'),
  dense: true,
)

dense.png

leading

將圖像或圖標添加到列表的開頭牵现。這通常是一個圖標铐懊。

ListTile(
  leading: CircleAvatar(
    backgroundImage: NetworkImage(imageUrl),
  ),
  title: Text('Horse'),
)

leading.png

ListTile(
  leading: Icon(Icons.home),
  title: Text('House'),
)

leading1.png

trailing

設(shè)置拖尾將在列表的末尾放置一個圖像。這對于指示主-細節(jié)布局特別有用瞎疼。

ListTile(
  title: Text('Horse'),
  trailing: Icon(Icons.keyboard_arrow_right),
)

trailing.png

contentPadding

設(shè)置內(nèi)容邊距科乎，默認是 16，但我們在這里設(shè)置為 0

ListTile(
  title: Text('Horse'),
  trailing: Icon(Icons.keyboard_arrow_right),
  contentPadding: EdgeInsets.symmetric(horizontal: 0.0),
)

contentPadding.png

selected

如果選中列表的 item 項贼急，那么文本和圖標的顏色將成為主題的主顏色茅茂。

ListTile(
  title: Text('Horse'),
  trailing: Icon(Icons.keyboard_arrow_right),
  selected: true,
)

selected.png

Gesture recognition

ListTile 可以檢測用戶的點擊和長按事件，onTap 為單擊太抓，onLongPress 為長按空闲。對于波紋效果是內(nèi)置的

ListTile(
  title: Text('Horse'),
  onTap: () {
    // do something
  },
  onLongPress: (){
    // do something else
  },
)

Gesture.gif

enabled

通過將 enable 設(shè)置為 false，來禁止點擊事件

ListTile(
  title: Text('Horse'),
  onTap: () {
    // this will not get called
  },
  enabled: false,
)

enabled.png

ListTile.divideTiles

靜態(tài)方法 divideTiles 可以在 titles 之間添加分隔符走敌，這個顏色有點淡碴倾，需要看仔細點才能看出來，哈哈哈哈

ListView(
  children: ListTile.divideTiles(
      context: context,
      tiles: [
        ListTile(
          title: Text('Horse'),
        ),
        ListTile(
          title: Text('Cow'),
        ),
        ListTile(
          title: Text('Camel'),
        ),
        ListTile(
          title: Text('Sheep'),
        ),
        ListTile(
          title: Text('Goat'),
        ),
      ]
  ).toList(),
)

divideTiles.png

使用實例

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'My App',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        appBar: AppBar(title: Text('ListTile guide')),
        body: BodyWidget(),
      ),
    );
  }
}

String horseUrl = 'https://i.stack.imgur.com/Dw6f7.png';
String cowUrl = 'https://i.stack.imgur.com/XPOr3.png';
String camelUrl = 'https://i.stack.imgur.com/YN0m7.png';
String sheepUrl = 'https://i.stack.imgur.com/wKzo8.png';
String goatUrl = 'https://i.stack.imgur.com/Qt4JP.png';

class BodyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ListView(
      children: <Widget>[
        ListTile(
          leading: CircleAvatar(
            backgroundImage: NetworkImage(horseUrl),
          ),
          title: Text('Horse'),
          subtitle: Text('A strong animal'),
          trailing: Icon(Icons.keyboard_arrow_right),
          onTap: () {
            print('horse');
          },
          selected: true,
        ),
        ListTile(
          leading: CircleAvatar(
            backgroundImage: NetworkImage(cowUrl),
          ),
          title: Text('Cow'),
          subtitle: Text('Provider of milk'),
          trailing: Icon(Icons.keyboard_arrow_right),
          onTap: () {
            print('cow');
          },
        ),
        ListTile(
          leading: CircleAvatar(
            backgroundImage: NetworkImage(camelUrl),
          ),
          title: Text('Camel'),
          subtitle: Text('Comes with humps'),
          trailing: Icon(Icons.keyboard_arrow_right),
          onTap: () {
            print('camel');
          },
          enabled: false,
        ),
        ListTile(
          leading: CircleAvatar(
            backgroundImage: NetworkImage(sheepUrl),
          ),
          title: Text('Sheep'),
          subtitle: Text('Provides wool'),
          trailing: Icon(Icons.keyboard_arrow_right),
          onTap: () {
            print('sheep');
          },
        ),
        ListTile(
          leading: CircleAvatar(
            backgroundImage: NetworkImage(goatUrl),
          ),
          title: Text('Goat'),
          subtitle: Text('Some have horns'),
          trailing: Icon(Icons.keyboard_arrow_right),
          onTap: () {
            print('goat');
          },
        ),
      ],
    );
  }
}

demo.png

作者介紹

• 陳堅潤：廣州蘆葦科技 APP 團隊 Android 開發(fā)工程師

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