Image是Flutter里提供的显示图片的控件,类似Android里ImageView,不过其用法有点类似Glide等图片框架。 我们先看Image的用法。Flutter对Image控件提供了多种构造函数: 代码语言:javascript 复制 newImage用于从ImageProvider获取图像newImage.asset用于使用key从AssetBundle获取图像newImage.network用于从URL地址获取图像newImage.fi...
# An image asset can refer to one or more resolution-specific "variants", see # https://flutter.dev/assets-and-images/#resolution-aware. # For details regarding adding assets from package dependencies, see # https://flutter.dev/assets-and-images/#from-packages # To add custom fonts to yo...
/// When running flutter on the web, headers are not used. Map<String, String>? get headers; @override ImageStreamCompleter load(NetworkImage key, DecoderCallback decode); } NetworkImage是一个继承ImageProvider的抽象类 进入network_image.NetworkImage,到了_network_image_io.dart文件。 @override Im...
child: Image.network( 'https://raw.githubusercontent.com/think-ing/flutter_demo/master/images/ba.jpg', ),*//*图片混合蓝色 child: Image.network( 'https://raw.githubusercontent.com/think-ing/flutter_demo/master/images/ba.jpg', color: Colors.blue, colorBlendMode: BlendMode.colorDodge, ),*...
Image.network:网络资源图片,意思就是你需要加入一段http://xxxx.xxx的这样的网络路径地址。 Image.file:加载本地图片,就是加载本地文件中的图片,这个是一个绝对路径,跟包体无关。 Image.memory: 加载Uint8List资源图片。 网络资源图片: import 'package:flutter/material.dart'; ...
addAutomaticKeepAlives: false (true by default) addRepaintBoundaries: false (true by default) ); 由于重新绘制子元素和管理状态等操作会占用更多的 CPU 和 GPU 资源,但是它能够解决你 App 的内存问题,并且会得到一个高性能的视图列表。 参考文档:https://developer.aliyun.com/article/871628...
在flutter里使用image.network加载网络图片遇到错误══╡ EXCEPTION CAUGHT BY IMAGE RESOURCE SERVICE ╞════════════════════════════════════════════════════The following SocketException was thrown resolving an image codec:Failed host lookup:...
Flutter中可以使用Image.network 加载远程图片,最新版本的Flutter中加载远程图片需要注意协议,协议需要使用https协议 import'package:flutter/material.dart';voidmain()=>runApp(MyApp());classMyAppextendsStatelessWidget{@overrideWidgetbuild(BuildContextcontext){// TODO: implement buildreturnMaterialApp(home:Scaffold(...
import'dart:ui';import'package:flutter/cupertino.dart';import'package:flutter/material.dart';import'package:flutter/rendering.dart';voidmain(){runApp(MyApp());}//自定义组件classMyAppextendsStatelessWidget{Widgetbuild(BuildContextcontext){// MaterialApp是一个根组件returnMaterialApp(// 脚手架home:Scaffol...
NetworkImage是一个可以从网络下载图片的类,它本身是异步的。Image.network是对NetworkImage的封装,它需要传入一个URL地址就可以返回一个Image对象。这两个的设计跟AssetImage和Image.asset的设计基本一致。 3. NetworkImage Image( image: NetworkImage("http://www.fulade.me/img/avatar.jpg"), ...