分类目录归档：Flutter
用于在移动平台中启动URL的Flutter插件。支持iOS和Android。
dependencies:
url_launcher: ^5.0.1$ flutter packages getimport 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
void main() {
runApp(Scaffold(
body: Center(
child: RaisedButton(
...封装iOS上的NSUserDefaults和Android上的SharedPreferences，为简单数据提供持久存储。数据以异步方式持久保存到磁盘。这两个平台都不能保证在返回后写入将持久保存到磁盘，并且此插件不能用于存储关键数据。
dependencies:
shared_preferences: ^0.5.1+1flutter packages getimport 'package:shared_preferences/shared_preferences.dart';import 'package:flutter/material.d...dependencies:
video_player: ^0.10.0+2flutter packages getimport 'package:video_player/video_player.dart';
警告：视频播放器在iOS模拟器上无法正常运行。在开发/测试期间必须使用iOS设备。
将以下条目添加到位于<project root> /ios/Runner/Info.plist中的Info.plist文件中：
<key>NSAppTransportSecurity</key>
<d...import 'package:flutter/material.dart';
import '../../gallery/demo.dart';
const String _checkboxText =
'Checkboxes allow the user to select multiple options from a set. '
'A normal checkbox\'s value is true or false and a tristate checkbox\'s '
'...import 'dart:async';
import 'package:flutter/material.dart';
import '../../gallery/demo.dart';
enum IndicatorType { overscroll, refresh }
class OverscrollDemo extends StatefulWidget {
const OverscrollDemo({ Key key }) : super(key: key);
static const String routeNa...import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import '../../gallery/demo.dart';
enum _ReorderableListType {
/// A list tile that contains a [CircleAvatar].
horizontalAvatar,
/// A...import 'package:flutter/material.dart';
import '../../gallery/demo.dart';
class SearchDemo extends StatefulWidget {
static const String routeName = '/material/search';
@override
_SearchDemoState createState() => _SearchDemoState();
}
class _SearchDemoState ext...import 'package:flutter/material.dart';
import '../../gallery/demo.dart';
class ElevationDemo extends StatefulWidget {
static const String routeName = '/material/elevation';
@override
State<StatefulWidget> createState() => _ElevationDemoState();
}
class ...import 'dart:math' as math;
import 'package:flutter/material.dart';
// 该Demo一次显示一个类别。背景显示了一个列表
// 显示所有类别和所选类别
//（CategoryView）在背景之上。
class Category {
const Category({ this.title, this.assets });
final String title;
final List<String> assets;
@override
String toS...页面跳转携带参数替换整个屏幕的页面路由。
import 'package:flutter/material.dart';
class User {
final String account, email;
const User({
this.account,
t...