Android 如何使用自定义appbar正确定位主体和抽屉?
我尝试用转置模糊效果制作appbar, 我的做法是:Android 如何使用自定义appbar正确定位主体和抽屉?,android,flutter,Android,Flutter,我尝试用转置模糊效果制作appbar, 我的做法是: return Stack(children: <Widget>[ Scaffold( key: _scaffoldKey, backgroundColor: Theme.of(context).backgroundColor, body: Center( child: buildProcurementList(), ), ), Positioned( top: 0.0, left: 0.0, r
return Stack(children: <Widget>[
Scaffold(
key: _scaffoldKey,
backgroundColor: Theme.of(context).backgroundColor,
body: Center(
child: buildProcurementList(),
),
),
Positioned(
top: 0.0,
left: 0.0,
right: 0.0,
child: ClipRect(
child: BackdropFilter(
filter: ui.ImageFilter.blur(sigmaX: 5.0, sigmaY: 5.0),
child: Container(
child: AppBar(
backgroundColor: Colors.transparent,
title: Text(
'Title',
),
centerTitle: true,
),
decoration:
BoxDecoration(color: Colors.blue.shade200.withOpacity(0.5)),
),
),
),
),
返回堆栈(子级:[
脚手架(
钥匙:_scaffoldKey,
背景色:主题。背景色,
正文:中(
子项:buildProcurementList(),
),
),
定位(
排名:0.0,
左:0.0,
右:0.0,
孩子:ClipRect(
孩子:背投滤波器(
过滤器:ui.ImageFilter.blur(sigmaX:5.0,sigmaY:5.0),
子:容器(
孩子:AppBar(
背景颜色:颜色。透明,
标题:正文(
“头衔”,
),
标题:对,
),
装饰:
盒子装饰(颜色:Colors.blue.shade200.withOpacity(0.5)),
),
),
),
),
我得到了想要的效果,但由于堆叠,主体和抽屉固定在顶部。请告诉我一种方法,向主体和抽屉添加与appbar大小相同的填充物,就像在普通脚手架中一样
,第1步:将堆栈移动到脚手架主体
步骤2:将定位的appbar放入堆叠小部件的最后一个
完整代码
import 'package:flutter/material.dart';
import 'dart:ui' as ui;
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
debugShowCheckedModeBanner: false,
theme: ThemeData(
// This is the theme of your application.
//
// Try running your application with "flutter run". You'll see the
// application has a blue toolbar. Then, without quitting the app, try
// changing the primarySwatch below to Colors.green and then invoke
// "hot reload" (press "r" in the console where you ran "flutter run",
// or simply save your changes to "hot reload" in a Flutter IDE).
// Notice that the counter didn't reset back to zero; the application
// is not restarted.
primarySwatch: Colors.blue,
),
home: ListenToDrawerEvent(),
);
}
}
class ListenToDrawerEvent extends StatefulWidget {
@override
ListenToDrawerEventState createState() {
return new ListenToDrawerEventState();
}
}
class ListenToDrawerEventState extends State<ListenToDrawerEvent> {
GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey<ScaffoldState>();
static final List<String> _listViewData = [
"Inducesmile.com",
"Flutter Dev",
"Android Dev",
"iOS Dev!",
"React Native Dev!",
"React Dev!",
"express Dev!",
"Laravel Dev!",
"Angular Dev!",
];
@override
Widget build(BuildContext context) {
return Scaffold(
key: _scaffoldKey,
/*appBar: AppBar(
title: Text("Listen to Drawer Open / Close Example"),
leading: IconButton(
icon: Icon(Icons.menu),
onPressed: () {
_scaffoldKey.currentState.openDrawer();
},
),
),*/
drawer: Drawer(
child: ListView(
padding: EdgeInsets.all(10.0),
children: _listViewData
.map((data) => ListTile(
title: Text(data),
))
.toList(),
),
),
body: Stack(
children: <Widget>[
Center(
child: ListView.builder(
itemCount: 30,
itemBuilder: (context, index) {
return Container(
color: Colors.primaries[index % Colors.primaries.length]
.withOpacity(0.5),
child: ListTile(
title: Text('Item $index'),
),
);
},
),
),
Positioned(
top: 0.0,
left: 0.0,
right: 0.0,
child: ClipRect(
child: BackdropFilter(
filter: ui.ImageFilter.blur(sigmaX: 5.0, sigmaY: 5.0),
child: Container(
child: AppBar(
backgroundColor: Colors.transparent,
title: Text(
'Title',
),
centerTitle: true,
actions: <Widget>[
// action button
IconButton(
icon: Icon(Icons.access_alarm),
onPressed: () {
//_select(choices[0]);
},
),
// action button
IconButton(
icon: Icon(Icons.memory),
onPressed: () {
//_select(choices[1]);
},
),
]),
decoration: BoxDecoration(
color: Colors.blue.shade200.withOpacity(0.5)),
),
),
),
),
],
),
);
}
}
导入“包装:颤振/材料.省道”;
将“dart:ui”导入为ui;
void main()=>runApp(MyApp());
类MyApp扩展了无状态小部件{
//此小部件是应用程序的根。
@凌驾
小部件构建(构建上下文){
返回材料PP(
标题:“颤振演示”,
debugShowCheckedModeBanner:false,
主题:主题数据(
//这是应用程序的主题。
//
//尝试使用“flutter run”运行应用程序。您将看到
//应用程序有一个蓝色工具栏。然后,在不退出应用程序的情况下,重试
//将下面的primarySwatch更改为Colors.green,然后调用
//“热重新加载”(在运行“颤振运行”的控制台中按“r”,
//或者只需将更改保存到颤振IDE中的“热重新加载”。
//请注意,计数器没有重置回零;应用程序
//未重新启动。
主样本:颜色。蓝色,
),
主页:ListenToDroperEvent(),
);
}
}
类ListenToDrawerEvent扩展StatefulWidget{
@凌驾
ListenToDroperReventState createState(){
返回新的ListenToDroperReventState();
}
}
类ListenToDroperReventState扩展了状态{
GlobalKey _scaffoldKey=GlobalKey();
静态最终列表_listViewData=[
“微笑网”,
“颤振开发”,
“安卓开发”,
“iOS开发!”,
“反应本机开发人员!”,
“反应,德夫!”,
“快车开发!”,
“Laravel Dev!”,
“角度偏差!”,
];
@凌驾
小部件构建(构建上下文){
返回脚手架(
钥匙:_scaffoldKey,
/*appBar:appBar(
标题:文本(“听抽屉打开/关闭示例”),
领先:IconButton(
图标:图标(图标菜单),
已按下:(){
_scaffoldKey.currentState.openDrawer();
},
),
),*/
抽屉(
子:ListView(
填充:所有边缘设置(10.0),
子项:\u listViewData
.map((数据)=>ListTile(
标题:文本(数据),
))
.toList(),
),
),
主体:堆栈(
儿童:[
居中(
子项:ListView.builder(
物品计数:30,
itemBuilder:(上下文,索引){
返回容器(
颜色:颜色.原色[索引%颜色.原色.长度]
.不透明度(0.5),
孩子:ListTile(
标题:文本(“项$index”),
),
);
},
),
),
定位(
排名:0.0,
左:0.0,
右:0.0,
孩子:ClipRect(
孩子:背投滤波器(
过滤器:ui.ImageFilter.blur(sigmaX:5.0,sigmaY:5.0),
子:容器(
孩子:AppBar(
背景颜色:颜色。透明,
标题:正文(
“头衔”,
),
标题:对,
行动:[
//动作按钮
图标按钮(
图标:图标(图标访问报警),
已按下:(){
//_选择(选项[0]);
},
),
//动作按钮
图标按钮(
图标:图标(图标。内存),
已按下:(){
//_选择(选项[1]);
},
),
]),
装饰:盒子装饰(
颜色:Colors.blue.shade200.withOpacity(0.5)),
),
),
),
),
],
),
);
}
}