forked from lxm_flutter/FlutterUnit
55 lines
1.4 KiB
Dart
55 lines
1.4 KiB
Dart
import 'package:flutter/material.dart';
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/// create by 张风捷特烈 on 2020/4/27
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/// contact me by email 1981462002@qq.com
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/// 说明:
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// {
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// "widgetId": 162,
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// "name": 'ListView.builder构造',
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// "priority": 3,
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// "subtitle":
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// "【itemCount】 : 条目个数 【int】\n"
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// "【itemBuilder】 : 条目构造器 【IndexedWidgetBuilder】",
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// }
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class BuilderListView extends StatelessWidget {
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final data = <Color>[
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Colors.purple[50],
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Colors.purple[100],
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Colors.purple[200],
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Colors.purple[300],
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Colors.purple[400],
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Colors.purple[500],
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Colors.purple[600],
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Colors.purple[700],
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Colors.purple[800],
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Colors.purple[900],
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];
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@override
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Widget build(BuildContext context) {
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return Container(
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height: 200,
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child: ListView.builder(
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itemCount: data.length,
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itemBuilder: (context, index) => _buildItem(data[index]),
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),
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);
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}
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String colorString(Color color) =>
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"#${color.value.toRadixString(16).padLeft(8, '0').toUpperCase()}";
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Widget _buildItem(Color color) => Container(
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alignment: Alignment.center,
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width: 100,
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height: 50,
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color: color,
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child: Text(
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colorString(color),
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style: TextStyle(color: Colors.white, shadows: [
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Shadow(color: Colors.black, offset: Offset(.5, .5), blurRadius: 2)
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]),
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),
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);
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} |