forked from lxm_flutter/FlutterUnit
52 lines
1.7 KiB
Dart
52 lines
1.7 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'dart:ui' as ui;
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/// create by 张风捷特烈 on 2020-04-01
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/// contact me by email 1981462002@qq.com
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/// 说明: 320 DefaultAssetBundle 默认资源包
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/// 一个 InheritedWidget，设置 AssetBundle 对象后，该节点后的节点上下文可以通过 DefaultAssetBundle.of(context) 获取 AssetBundle 对象用于访问资源文件。
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// {
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// "widgetId": 320,
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// "name": 'DefaultAssetBundle 介绍',
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// "priority": 1,
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// "subtitle":
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// "【bundle】 : *资源包 【AssetBundle】\n"
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// "【child】 : *子组件 【Widget】\n"
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// "我们可以定义自己的 DefaultAssetBundle 来供后续节点使用，也可以直接使用默认的。该案例演示通过框架提供的 DefaultAssetBundle 加载一张资源图片进行显示。",
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// }
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class DefaultAssetBundleDemo extends StatefulWidget {
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@override
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_DefaultAssetBundleDemoState createState() => _DefaultAssetBundleDemoState();
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}
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class _DefaultAssetBundleDemoState extends State<DefaultAssetBundleDemo> {
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ui.Image _image;
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@override
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void initState() {
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super.initState();
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_load();
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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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width: 150,
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height: 150,
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color: Colors.blue.withOpacity(0.1),
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padding: EdgeInsets.all(10),
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margin: EdgeInsets.all(10),
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child: _image==null?Container():RawImage(image: _image,fit: BoxFit.cover,),
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);
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}
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void _load() async{
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AssetBundle info = DefaultAssetBundle.of(context);
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ByteData data = await info.load('assets/images/sabar.webp');
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_image = await decodeImageFromList(data.buffer.asUint8List());
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setState(() {
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});
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}
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}
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