带有搜索过滤器的Flutter应用网格视图? [英] Flutter app grid view with search filter?
本文介绍了带有搜索过滤器的Flutter应用网格视图?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在这段混乱的代码中，我已经在AppBar中实现了带有搜索过滤器的Gridview. 目前仅显示建筑物名称，但我也想显示建筑物地名吗? 有什么办法可以同时过滤建筑物名称和地名?
In this flutter code, I have implemented a Gridview with a search filter in AppBar. Currently showing only building name but I want to show building place name also? is there any way I can filter both building names and place names?
- 我也要在gridview中显示建筑物的地名-值
-
单击网格项目时如何获取项目ID?
- I want to show building place name-value also in the gridview
When clicked a grid item how to get the item id?
import 'package:flutter/material.dart';
import 'package:realpro/SizeConfig.dart';
import 'package:realpro/root/dashscreen.dart';
class SearchList extends StatefulWidget {
SearchList({ Key key }) : super(key: key);
@override
_SearchListState createState() => new _SearchListState();
}
class _SearchListState extends State<SearchList>
{
Widget appBarTitle = new Text("My Properties", style: new TextStyle(color:
Colors.white),);
Icon actionIcon = new Icon(Icons.search, color: Colors.orange,);
final key = new GlobalKey<ScaffoldState>();
final TextEditingController _searchQuery = new TextEditingController();
List<String> _list;
bool _IsSearching;
String _searchText = "";
_SearchListState() {
_searchQuery.addListener(() {
if (_searchQuery.text.isEmpty) {
setState(() {
_IsSearching = false;
_searchText = "";
});
}
else {
setState(() {
_IsSearching = true;
_searchText = _searchQuery.text;
});
}
});
}
@override
void initState() {
super.initState();
_IsSearching = false;
init();
}
void init() {
_list = List();
_list.add("building 1",);
_list.add("building 2");
_list.add("building 3");
_list.add("building 4");
_list.add("building 5");
_list.add("building 6");
_list.add("building 7");
_list.add("building 8");
_list.add("building 9");
_list.add("building 10");
}
@override
Widget build(BuildContext context) {
SizeConfig().init(context);
return new Scaffold(
key: key,
appBar: buildBar(context),
body: new GridView.count(
crossAxisCount: 3,
padding: EdgeInsets.fromLTRB(10,10,10,10),
childAspectRatio: 8.0 / 9.0,
children: _IsSearching ? _buildSearchList() : _buildList(),
),
drawer: Navigationdrawer(),
);
}
List<Uiitem> _buildList() {
return _list.map((contact) => new Uiitem(contact)).toList();
}
List<Uiitem> _buildSearchList() {
if (_searchText.isEmpty) {
return _list.map((contact) => new Uiitem(contact))
.toList();
}
else {
List<String> _searchList = List();
for (int i = 0; i < _list.length; i++) {
String name = _list.elementAt(i);
if (name.toLowerCase().contains(_searchText.toLowerCase())) {
_searchList.add(name);
}
}
return _searchList.map((contact) => new Uiitem(contact))
.toList();
}
}
Widget buildBar(BuildContext context) {
return new AppBar(
centerTitle: true,
title: appBarTitle,
iconTheme: new IconThemeData(color:Colors.orange),
backgroundColor: Colors.black,
actions: <Widget>[
new IconButton(icon: actionIcon, onPressed: () {
setState(() {
if (this.actionIcon.icon == Icons.search) {
this.actionIcon = new Icon(Icons.close, color: Colors.orange,);
this.appBarTitle = new TextField(
controller: _searchQuery,
style: new TextStyle(
color: Colors.orange,
),
decoration: new InputDecoration(
hintText: "Search here..",
hintStyle: new TextStyle(color: Colors.white)
),
);
_handleSearchStart();
}
else {
_handleSearchEnd();
}
});
},),
]
);
}
void _handleSearchStart() {
setState(() {
_IsSearching = true;
});
}
void _handleSearchEnd() {
setState(() {
this.actionIcon = new Icon(Icons.search, color: Colors.orange,);
this.appBarTitle =
new Text("My Properties", style: new TextStyle(color: Colors.white),);
_IsSearching = false;
_searchQuery.clear();
});
}
}
class Uiitem extends StatelessWidget{
final String name;
Uiitem(this.name);
Widget build(BuildContext context){
return new Card(
margin: EdgeInsets.fromLTRB(5,5,5,7),
elevation: 10.0,
child: InkWell(
splashColor: Colors.orange,
onTap: (){
},
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
AspectRatio(
aspectRatio: 18.0 / 11.0,
child: Image.asset('assets/images/build.jpeg',fit: BoxFit.scaleDown,),
),
Padding(
padding: EdgeInsets.fromLTRB(10.0, 15.0, 0.0,0.0),
child: Column(crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(this.name,style: new TextStyle(fontFamily: 'Raleway',fontWeight:
FontWeight.bold,fontSize: 14.0),
maxLines: 1,
),
SizedBox(height: 0.0),
Text('Place',style: new TextStyle(fontFamily: 'Roboto'),),
],
),
),
],
),
),
);
}
}
推荐答案
您可以在
下复制粘贴运行完整代码
步骤1:您可以定义具有属性id, name, place
的Building类
步骤2:返回搜索列表不返回List<Uiitem>
步骤3:使用GridView.builder并返回Uiitem(_searchList[index]);
步骤4:Uiitem接受Building，以便您的InkWell可以获取id
You can copy paste run full code below
Step 1: You can define a Building class have attribute id, name, place
Step 2: Return search list not return List<Uiitem>
Step 3: Use GridView.builder and return Uiitem(_searchList[index]);
Step 4: Uiitem accept Building so your InkWell can get id
工作演示
完整代码
import 'package:flutter/material.dart';
class Building {
String id;
String name;
String place;
Building({this.id, this.name, this.place});
}
class SearchList extends StatefulWidget {
SearchList({Key key}) : super(key: key);
@override
_SearchListState createState() => _SearchListState();
}
class _SearchListState extends State<SearchList> {
Widget appBarTitle = Text(
"My Properties",
style: TextStyle(color: Colors.white),
);
Icon actionIcon = Icon(
Icons.search,
color: Colors.orange,
);
final key = GlobalKey<ScaffoldState>();
final TextEditingController _searchQuery = TextEditingController();
List<Building> _list;
List<Building> _searchList = List();
bool _IsSearching;
String _searchText = "";
_SearchListState() {
_searchQuery.addListener(() {
if (_searchQuery.text.isEmpty) {
setState(() {
_IsSearching = false;
_searchText = "";
_buildSearchList();
});
} else {
setState(() {
_IsSearching = true;
_searchText = _searchQuery.text;
_buildSearchList();
});
}
});
}
@override
void initState() {
super.initState();
_IsSearching = false;
init();
}
void init() {
_list = List();
_list.add(
Building(id:"1", name: "A 1", place: "google"),
);
_list.add(
Building(id:"2", name: "A 2", place: "google"),
);
_list.add(
Building(id:"3",name: "B 3", place: "facebook"),
);
_list.add(
Building(id:"4",name: "B 4", place: "facebook"),
);
_list.add(
Building(id:"5",name: "C 5", place: "flutter"),
);
_searchList = _list;
}
@override
Widget build(BuildContext context) {
//SizeConfig().init(context);
return Scaffold(
key: key,
appBar: buildBar(context),
body: GridView.builder(
itemCount: _searchList.length,
itemBuilder: (context, index) {
return Uiitem(_searchList[index]);
},
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 3,
)
/* GridView.count(
crossAxisCount: 3,
padding: EdgeInsets.fromLTRB(10, 10, 10, 10),
childAspectRatio: 8.0 / 9.0,
children: _IsSearching ? _buildSearchList() : _buildList(),
),*/
//drawer: Navigationdrawer(),
));
}
List<Building> _buildList() {
return _list; //_list.map((contact) => Uiitem(contact)).toList();
}
List<Building> _buildSearchList() {
if (_searchText.isEmpty) {
return _searchList =
_list; //_list.map((contact) => Uiitem(contact)).toList();
} else {
/*for (int i = 0; i < _list.length; i++) {
String name = _list.elementAt(i);
if (name.toLowerCase().contains(_searchText.toLowerCase())) {
_searchList.add(name);
}
}*/
_searchList = _list
.where((element) =>
element.name.toLowerCase().contains(_searchText.toLowerCase()) ||
element.place.toLowerCase().contains(_searchText.toLowerCase()))
.toList();
print('${_searchList.length}');
return _searchList; //_searchList.map((contact) => Uiitem(contact)).toList();
}
}
Widget buildBar(BuildContext context) {
return AppBar(
centerTitle: true,
title: appBarTitle,
iconTheme: IconThemeData(color: Colors.orange),
backgroundColor: Colors.black,
actions: <Widget>[
IconButton(
icon: actionIcon,
onPressed: () {
setState(() {
if (this.actionIcon.icon == Icons.search) {
this.actionIcon = Icon(
Icons.close,
color: Colors.orange,
);
this.appBarTitle = TextField(
controller: _searchQuery,
style: TextStyle(
color: Colors.orange,
),
decoration: InputDecoration(
hintText: "Search here..",
hintStyle: TextStyle(color: Colors.white)),
);
_handleSearchStart();
} else {
_handleSearchEnd();
}
});
},
),
]);
}
void _handleSearchStart() {
setState(() {
_IsSearching = true;
});
}
void _handleSearchEnd() {
setState(() {
this.actionIcon = Icon(
Icons.search,
color: Colors.orange,
);
this.appBarTitle = Text(
"My Properties",
style: TextStyle(color: Colors.white),
);
_IsSearching = false;
_searchQuery.clear();
});
}
}
class Uiitem extends StatelessWidget {
final Building building;
Uiitem(this.building);
Widget build(BuildContext context) {
return Card(
margin: EdgeInsets.fromLTRB(5, 5, 5, 7),
elevation: 10.0,
child: InkWell(
splashColor: Colors.orange,
onTap: () {
print(building.id);
},
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
AspectRatio(
aspectRatio: 18.0 / 11.0,
child: Image.asset(
'assets/images/build.jpeg',
fit: BoxFit.scaleDown,
),
),
Padding(
padding: EdgeInsets.fromLTRB(10.0, 15.0, 0.0, 0.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
this.building.name,
style: TextStyle(
fontFamily: 'Raleway',
fontWeight: FontWeight.bold,
fontSize: 14.0),
maxLines: 1,
),
SizedBox(height: 0.0),
Text(
building.place,
style: TextStyle(fontFamily: 'Roboto'),
),
],
),
),
],
),
),
);
}
}
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: SearchList(),
);
}
}
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