How to navigate to a new page from search results - flutter

Question

I am trying to find out about search navigation and could not find any suitable tutorial showing me how to navigate to specific pages after your search. I hope someone could explain me how I can do this.
After searching "Google" I would like to press on it and be redirected to a new page through navigation.
import 'package:flutter/material.dart';
class SearchPage extends StatefulWidget {
#override
_SearchPageState createState() => _SearchPageState();
}
class _SearchPageState extends State<SearchPage> {
Widget appBarTitle = Text(
"Search",
style: TextStyle(color: Colors.white),
);
Icon actionIcon = Icon(
Icons.search,
color: Colors.white,
);
final key = GlobalKey<ScaffoldState>();
final TextEditingController _searchQuery = TextEditingController();
List<String> _list;
bool _isSearching;
String _searchText = "";
_SearchPageState() {
_searchQuery.addListener(() {
if (_searchQuery.text.isEmpty) {
setState(() {
_isSearching = false;
_searchText = "";
});
} else {
setState(() {
_isSearching = true;
_searchText = _searchQuery.text;
});
}
});
}
#override
void initState() {
super.initState();
_isSearching = false;
initData();
}
void initData() {
_list = List();
_list.add("google");
_list.add("IOS");
_list.add("Android");
_list.add("Linux");
_list.add("MacOS");
_list.add("Windows");
}
#override
Widget build(BuildContext context) {
return new Scaffold(
key: key,
appBar: buildBar(context),
body: new ListView(
padding: new EdgeInsets.symmetric(vertical: 8.0),
children: _isSearching ? _buildSearchList() : _buildList(),
),
);
}
List<ChildItem> _buildList() {
return _list.map((contact) => new ChildItem(contact)).toList();
}
List<ChildItem> _buildSearchList() {
if (_searchText.isEmpty) {
return _list.map((contact) => new ChildItem(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 ChildItem(contact))
.toList();
}
}
Widget buildBar(BuildContext context) {
return new AppBar(
centerTitle: true,
title: appBarTitle,
actions: <Widget>[
new IconButton(icon: actionIcon, onPressed: () {
setState(() {
if (this.actionIcon.icon == Icons.search) {
this.actionIcon = new Icon(Icons.close, color: Colors.white,);
this.appBarTitle = new TextField(
controller: _searchQuery,
style: new TextStyle(
color: Colors.white,
),
decoration: new InputDecoration(
prefixIcon: new Icon(Icons.search, color: Colors.white),
hintText: "search...",
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.white,);
this.appBarTitle =
new Text("search", style: new TextStyle(color: Colors.white),);
_isSearching = false;
_searchQuery.clear();
});
}
}
class ChildItem extends StatelessWidget {
final String name;
ChildItem(this.name);
#override
Widget build(BuildContext context) {
return new ListTile(title: new Text(this.name));
}
}

Answer 1

You can also do it with a SearchDelegate.
Query and navigation under the buildSuggestions.
#override
Widget buildSuggestions(BuildContext context) {
final suggestionsList = query.isEmpty
? myList
: myList
.where((p) => p.toLowerCase().contains(query.toLowerCase()))
.toList();
return ListView.builder(
itemBuilder: (context, index) => ListTile(
onTap: () {
close(context, suggestionsList[index]);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => DetailScreen(myList
.indexWhere((item) => item == suggestionsList[index]))));
},
title: Text(suggestionsList[index]),
),
itemCount: suggestionsList.length,
);
}
The important part is pairing yourList's index with suggestionList index :
MaterialPageRoute(
builder: (context) => DetailScreen(myList
.indexWhere((item) => item == suggestionsList[index])))
Below is all the code with navigation.
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: HomePage(),
);
}
}
class HomePage extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Search Example"),
actions: [
IconButton(
icon: Icon(Icons.search),
onPressed: () {
showSearch(context: context, delegate: SearchItem());
}),
],
),
);
}
}
final List<String> myList = [
"google",
"IOS",
"Android",
"Linux",
"MacOS",
"Windows"
];
class SearchItem extends SearchDelegate<String> {
#override
List<Widget> buildActions(BuildContext context) {
return [
IconButton(
icon: Icon(Icons.clear),
onPressed: () {
query = "";
})
];
}
#override
Widget buildLeading(BuildContext context) {
return IconButton(
icon: AnimatedIcon(
icon: AnimatedIcons.menu_arrow,
progress: transitionAnimation,
),
onPressed: () {
close(context, null);
});
}
#override
Widget buildResults(BuildContext context) {}
#override
Widget buildSuggestions(BuildContext context) {
final suggestionsList = query.isEmpty
? myList
: myList
.where((p) => p.toLowerCase().contains(query.toLowerCase()))
.toList();
return ListView.builder(
itemBuilder: (context, index) => ListTile(
onTap: () {
close(context, suggestionsList[index]);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => DetailScreen(myList
.indexWhere((item) => item == suggestionsList[index]))));
},
title: Text(suggestionsList[index]),
),
itemCount: suggestionsList.length,
);
}
}
class DetailScreen extends StatelessWidget {
final int index;
DetailScreen(this.index);
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text("${myList[index]}"),),
body: Center(
child: Text(
"${myList[index]}",style: TextStyle(fontSize: 22),
),
));
}
}