augfun的博客

效果如下main.dart:import 'package:flutter/material.dart';import 'banner_view.dart';void main() { runApp(MyApp());}class MyApp extends StatelessWidget { // This widget is the root of your application. @override Widget build(BuildContext.

flutter开发中经常会遇到如标题所示的错误，意思是控件超出了屏幕尺寸。表现为应用并没有闪退，只是UI显示会与预期不符。比如在Row中放置几张图片时，最后一张超出了屏幕宽度，会变成这样子：源代码：import 'package:flutter/material.dart';void main() => runApp(MaterialApp( home: Scaffold( appBar: AppBar(title: Text("Row demo")),

Row和Column是Flex组件，是无法滚动的，如果没有足够的空间，flutter就提示溢出错误。这种情况下，Expanded或Flexible组件可用作长文本的自动换行。在Flutter文档中虽然没有明确说明，但是在主轴上如有内容超出空间，Expanded和Flexible会自动换行到纵轴。1 起源以下一步步来理解。如下的场景：class MyApp extends StatelessWidget { // This widget is the ...

Flutter滚动型容器组件 - ListView篇flutter前端dartui发布于 2019-07-101. 前言Flutter作为时下最流行的技术之一，凭借其出色的性能以及抹平多端的差异优势，早已引起大批技术爱好者的关注，甚至一些闲鱼，美团，腾讯等大公司均已投入生产使用。虽然目前其生态还没有完全成熟，但身靠背后的Google加持，其发展速度已经足够惊人，可以预见将来对Flutter开发人员的需求也会随之增长。无论是为了现在的技术尝鲜还是将来的潮流趋势，都9102年了，作为一.

实现行中两个控件分别左对齐和右对齐，方式有很多，示例代码如下：方式一：使用spaceBetween对齐方式new Row( mainAxisAlignment: MainAxisAlignment.spaceBetween, children: [ new Text("left"), new Text("right") ]);方式二：中间使用Expanded自动扩展Row( children: <Widget>[ FlutterLog

什么是抽屉菜单呢？  其实在APP中，抽屉菜单就是当手指在屏幕横向滑动时候，左边屏幕会滑出或者滑入一个View的东西，就像一个抽屉。下面是我在网上找的一个示例图，和现在正跑在我的模拟器上的目标图。  在Android或者IOS上，要实现这种侧滑抽屉空间，可以使用外部库来达到效果，不过Flutter本身已经给我们提供了Drawer这个UI组件，来使你更轻松地达到这个效果。Drawer及UserAccountsDrawerHeader可用属性Drawer属性 说明 elev..

文章来源：http://www.liulongbin.top:8084/#/在pubspec.yaml的dependencies节点中，新增插件如下：dependencies: toast: ^0.1.3在lib/main.dart中导入对应的插件：import 'package:toast/toast.dart';调用Toast.show()函数提示消息：// 参数1：提示消息// 参数2：提示消息多久后自动隐藏// 参数3：位置Toast.show("鉴...

直接上图上代码，代码部分有注释，莫有的自己百度（留言也可以）；效果图.pngclass TestDemo extends StatefulWidget { @override State<StatefulWidget> createState() { return _TestDemoState(); }}class _TestDemoState extends State<TestDemo> with SingleTickerProvi

Flutter-TabBar的使用说明在AppBar中有一个非常重要的Widget，这个Widget就是bottom，bottom是一个抽象类PreferredSizeWidget，可以看到一共有5个Widget继承了它：这里讲解使用TabBar这一种情况TabBar的使用需要结合AppBar，现在给出AppBar的使用说明地址：AppBar的使用说明TabBar的定义TabBar在使用之前，首先需要熟悉他的定义属性，现在查看常用定义属性：const TabBar({

1、界面分析通过下图我们可以拆分成 4 部分，头部、订单标题区域、订单列表区域、ListTitle同用部分。2、UI编写2.1、头部主要用到了圆形头像裁剪组件-ClipOval顶部头像区域Widget_topHeader(){returnContainer(width:ScreenUtil().setWidth(750),padding:EdgeInsets.all(20),color:Colors.white,child:...

news_detail_page.dartimport 'dart:convert';import 'package:flutter/cupertino.dart';import 'package:flutter/material.dart';import 'package:flutter_webview_plugin/flutter_webview_plugin.dart';import 'package:flutterapp2/constants/Constants.dart';imp

news_list_page.dart下拉刷新和加载更多import 'dart:convert';import 'package:flutter/cupertino.dart';import 'package:flutter/material.dart';import 'package:flutterapp2/common/event_bus.dart';import 'package:flutterapp2/constants/Constants.dart';import 'packa

shake_page.dartimport 'dart:async';import 'dart:math';import 'package:flutter/material.dart';import 'package:sensors/sensors.dart';import 'package:vibration/vibration.dart';class ShakePage extends StatefulWidget { @override _ShakePageState cr

discovery_page.dartimport 'package:flutter/material.dart';import 'common_web_page.dart';/** * 主界面find */class DiscoveryPage extends StatefulWidget { @override _DiscoveryPageState createState() => _DiscoveryPageState();}class _DiscoveryP

discovery_page.dartimport 'package:flutter/material.dart';/** * 主界面find */class DiscoveryPage extends StatefulWidget { @override _DiscoveryPageState createState() => _DiscoveryPageState();}class _DiscoveryPageState extends State<Discov

profile_page.dart点击条目0，跳转到MyMessagePage界面import 'dart:convert';import 'package:flutter/cupertino.dart';import 'package:flutter/material.dart';import 'package:flutterapp2/common/event_bus.dart';import 'package:flutterapp2/constants/Constants.dart';

profile_page.dart点击头像会跳转到用户详情界面ProfileDetailPageimport 'dart:convert';import 'package:flutter/cupertino.dart';import 'package:flutter/material.dart';import 'package:flutterapp2/common/event_bus.dart';import 'package:flutterapp2/constants/Constants.

settings_page.dart使用evenetbus监听退出的操作，清空用户的相关信息，然后刷新界面的信息import 'package:flutter/material.dart';import 'package:flutterapp2/common/event_bus.dart';import 'package:flutterapp2/constants/Constants.dart';import 'package:flutterapp2/utils/data_utils.dart'

profile_page.dart使用EventBus监听import 'dart:convert';import 'package:flutter/cupertino.dart';import 'package:flutter/material.dart';import 'package:flutterapp2/common/event_bus.dart';import 'package:flutterapp2/constants/Constants.dart';import 'pack

profile_page.dart是主界面逻辑userAvatar是用户图像的数据，先判断数据是否是空，不为空就更新数据，为空就还是加载默认图片import 'dart:convert';import 'package:flutter/cupertino.dart';import 'package:flutter/material.dart';import 'package:flutterapp2/common/event_bus.dart';import 'package:fluttera

profile_page.dart主界面使用EventBus登录成功以后跳转的逻辑中使用_getUerInfo来获取到用户的相关信息import 'package:flutter/cupertino.dart';import 'package:flutter/material.dart';import 'package:flutterapp2/common/event_bus.dart';import 'package:flutterapp2/constants/Constants.dart';

profile_page.dart主界面跳转逻辑触发import 'package:flutter/cupertino.dart';import 'package:flutter/material.dart';import 'package:flutterapp2/common/event_bus.dart';import 'package:flutterapp2/constants/Constants.dart';import 'package:flutterapp2/utils/data_

网络请求profile_page.dart对布局进行了填充，最上面的头像的布局和下面的条目的布局，_login()是网络请求相关的逻辑，使用WevView来实现import 'package:flutter/cupertino.dart';import 'package:flutter/material.dart';import 'package:flutterapp2/constants/Constants.dart';import 'login_web_page.dart';/**

main.dart主界面设置主题色，填充内容是HomePageimport 'package:flutter/material.dart';import 'package:flutterapp2/constants/Constants.dart';import 'HomePage.dart';void main() { runApp(MyApp());}class MyApp extends StatelessWidget { @override Widget build

main.dart主界面设置主题色，填充内容是HomePageimport 'package:flutter/material.dart';import 'package:flutterapp2/constants/Constants.dart';import 'HomePage.dart';void main() { runApp(MyApp());}class MyApp extends StatelessWidget { @override Widget build

前言上篇文章Android开发者的Flutter入门（一）讲解了用Flutter开发一个简单的新闻app的大体流程以及主要功能的实现。其中略过了一些功能的实现细节。这篇文章会对这些细节做一些阐述。涉及到的有以下这些点：闪屏页自定义布局下拉刷新上拉加载更多使用Assets路由（页面跳转）内嵌WebView闪屏页由于启动Flutter app的时候需要初始化Flutter。这个时间是比较长的。所以开发Flutter app的时候都需要加一个闪屏页。给Android平台上跑的Flu

前言Flutter推出来已经有一段时间了，前一阵Google IO大会后发布了Beta3。基于Flutter的 app可以一次编写，同时在Android和iOS平台上跑，并且能给用户带来完全原生的体验。我们都知道跨平台开发还有Hybrid，React Native以及Weex等方案，这些解决方案都是从Web开发的角度向Native开发演进，其技术基础都是HTML、CSS和Javascript等Web技术，对于没有接触过Web开发的Native app程序员来讲，门槛是比较高的。而Flutter给我的感觉

ex:import 'dart:math';import 'package:flutter/material.dart';void main() => runApp(MyApp());class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( home: HomePage(), ); }}c

eximport 'dart:math';import 'package:flutter/material.dart';void main() => runApp(MaterialApp( home: HomePage(),));class HomePage extends StatefulWidget { @override _HomePageState createState() => _HomePageState();}class _HomePageS

eximport 'dart:math';import 'package:flutter/material.dart';void main() => runApp(MaterialApp( home: HomePage(),));class HomePage extends StatefulWidget { @override _HomePageState createState() => _HomePageState();}class _HomePageS

ex:import 'dart:math';import 'package:flutter/material.dart';void main() => runApp(MaterialApp( home: HomePage(),));class HomePage extends StatefulWidget { @override _HomePageState createState() => _HomePageState();}class _HomePage

ex:import 'package:flutter/material.dart';void main() => runApp(MaterialApp( home: HomePage(),));class HomePage extends StatefulWidget { @override _HomePageState createState() => _HomePageState();}class _HomePageState extends State&l

ex:import 'package:flutter/material.dart';void main() => runApp(MaterialApp( home: HomePage(),));class HomePage extends StatefulWidget { @override _HomePageState createState() => _HomePageState();}class _HomePageState extends State&l

ex:import 'package:flutter/material.dart';void main() => runApp(MaterialApp( home: HomePage(),));class HomePage extends StatefulWidget { @override _HomePageState createState() => _HomePageState();}class _HomePageState extends State&l

ex:import 'package:flutter/material.dart';void main() => runApp(MaterialApp( home: HomePage(),));class HomePage extends StatefulWidget { @override _HomePageState createState() => _HomePageState();}class _HomePageState extends State&l

ex:import 'package:flutter/material.dart';void main() => runApp(MaterialApp( home: HomePage(),));class HomePage extends StatefulWidget { @override _HomePageState createState() => _HomePageState();}class _HomePageState extends State&l

ex:import 'package:flutter/material.dart';void main() => runApp(MaterialApp( home: HomePage(),));class HomePage extends StatelessWidget { final List<String> items = List.generate(20, (index) => 'item $index'); @override Widget

ex:import 'package:flutter/material.dart';void main() => runApp(MaterialApp( home: HomePage(),));class HomePage extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( body: Center( child

ex:import 'package:flutter/material.dart';void main() => runApp(MaterialApp( home: HomePage(),));class HomePage extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( body: Center( child

ex:import 'dart:math';import 'package:flutter/material.dart';void main() => runApp(MyApp());class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'CardApp', home: Hom