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How do I search in Flutter DropDown button
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I have a list of the countries name in local json. I can load my local json and assign to DropDown button. there is a 193 countries in json file as ex. shown below. If I want to select United State, user have to scroll all the way down. How can enter a countries name such as; if I user enter U or u the dropdown can makes quick filtering and list all the countries that starts with U such as United State. How do I search in Flutter DropDownbutton items?
{
"country": [
{
"countryCode": "AD",
"countryName": "Andorra",
"currencyCode": "EUR",
"isoNumeric": "020"
},
{
"countryCode": "AE",
"countryName": "United Arab Emirates",
"currencyCode": "AED",
"isoNumeric": "784"
},
{
"countryCode": "AF",
"countryName": "Afghanistan",
"currencyCode": "AFN",
"isoNumeric": "004"
},
dart 
flutter filtering dropdown asked yesterday
Nick
1418
add a comment |
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0
down vote
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I have a list of the countries name in local json. I can load my local json and assign to DropDown button. there is a 193 countries in json file as ex. shown below. If I want to select United State, user have to scroll all the way down. How can enter a countries name such as; if I user enter U or u the dropdown can makes quick filtering and list all the countries that starts with U such as United State. How do I search in Flutter DropDownbutton items?
{
"country": [
{
"countryCode": "AD",
"countryName": "Andorra",
"currencyCode": "EUR",
"isoNumeric": "020"
},
{
"countryCode": "AE",
"countryName": "United Arab Emirates",
"currencyCode": "AED",
"isoNumeric": "784"
},
{
"countryCode": "AF",
"countryName": "Afghanistan",
"currencyCode": "AFN",
"isoNumeric": "004"
},
asked yesterday
Nick
1418
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I have a list of the countries name in local json. I can load my local json and assign to DropDown button. there is a 193 countries in json file as ex. shown below. If I want to select United State, user have to scroll all the way down. How can enter a countries name such as; if I user enter U or u the dropdown can makes quick filtering and list all the countries that starts with U such as United State. How do I search in Flutter DropDownbutton items?
{
"country": [
{
"countryCode": "AD",
"countryName": "Andorra",
"currencyCode": "EUR",
"isoNumeric": "020"
},
{
"countryCode": "AE",
"countryName": "United Arab Emirates",
"currencyCode": "AED",
"isoNumeric": "784"
},
{
"countryCode": "AF",
"countryName": "Afghanistan",
"currencyCode": "AFN",
"isoNumeric": "004"
},
asked yesterday
Nick
1418
I have a list of the countries name in local json. I can load my local json and assign to DropDown button. there is a 193 countries in json file as ex. shown below. If I want to select United State, user have to scroll all the way down. How can enter a countries name such as; if I user enter U or u the dropdown can makes quick filtering and list all the countries that starts with U such as United State. How do I search in Flutter DropDownbutton items?
{
"country": [
{
"countryCode": "AD",
"countryName": "Andorra",
"currencyCode": "EUR",
"isoNumeric": "020"
},
{
"countryCode": "AE",
"countryName": "United Arab Emirates",
"currencyCode": "AED",
"isoNumeric": "784"
},
{
"countryCode": "AF",
"countryName": "Afghanistan",
"currencyCode": "AFN",
"isoNumeric": "004"
},
asked yesterday
Nick
1418
asked yesterday
Nick
1418
edited 23 hours ago
asked yesterday
Nick
1418
asked yesterday
Nick
1418
asked yesterday
Nick
1418
1418
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
0
down vote
One way is to use a TextEditingController to filter your ListView like this:
class YourPage extends StatefulWidget {
@override
State createState() => YourPageState();
}
class YourPageState extends State<YourPage> {
List<Country> countries = new List<Country>();
TextEditingController controller = new TextEditingController();
String filter;
@override
void initState() {
super.initState();
//fill countries with objects
controller.addListener(() {
setState(() {
filter = controller.text;
});
});
}
@override
void dispose() {
super.dispose();
controller.dispose();
}
@override
Widget build(BuildContext context) {
return new Material(
color: Colors.transparent,
child: new Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
new Padding(
padding: new EdgeInsets.only(top: 8.0, left: 16.0, right: 16.0),
child: new TextField(
style: new TextStyle(fontSize: 18.0, color: Colors.black),
decoration: InputDecoration(
prefixIcon: new Icon(Icons.search),
suffixIcon: new IconButton(
icon: new Icon(Icons.close),
onPressed: () {
controller.clear();
FocusScope.of(context).requestFocus(new FocusNode());
},
),
hintText: "Search...",
),
controller: controller,
)),
new Expanded(
child: new Padding(
padding: new EdgeInsets.only(top: 8.0),
child: _buildListView()),
)
],
));
}
Widget _buildListView() {
return ListView.builder(
itemCount: countries.length,
itemBuilder: (BuildContext context, int index) {
if (filter == null || filter == "") {
return _buildRow(countries[index]);
} else {
if (countries[index].countryName
.toLowerCase()
.contains(filter.toLowerCase())) {
return _buildRow(countries[index]);
} else {
return new Container();
}
}
});
}
Widget _buildRow(Country c) {
return new ListTile(
title: new Text(
c.countryName,
),
subtitle: new Text(
c.countryCode,
));
}
}
answered 23 hours ago
SnakeyHips
1959
SnakeyHips you misunderstood my question. My dropdown button inside a ListView, and I assign my data to my dropdown button. I am looking way so I can search or filter the dropdown button with user interaction.
– Nick
23 hours ago
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
One way is to use a TextEditingController to filter your ListView like this:
class YourPage extends StatefulWidget {
@override
State createState() => YourPageState();
}
class YourPageState extends State<YourPage> {
List<Country> countries = new List<Country>();
TextEditingController controller = new TextEditingController();
String filter;
@override
void initState() {
super.initState();
//fill countries with objects
controller.addListener(() {
setState(() {
filter = controller.text;
});
});
}
@override
void dispose() {
super.dispose();
controller.dispose();
}
@override
Widget build(BuildContext context) {
return new Material(
color: Colors.transparent,
child: new Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
new Padding(
padding: new EdgeInsets.only(top: 8.0, left: 16.0, right: 16.0),
child: new TextField(
style: new TextStyle(fontSize: 18.0, color: Colors.black),
decoration: InputDecoration(
prefixIcon: new Icon(Icons.search),
suffixIcon: new IconButton(
icon: new Icon(Icons.close),
onPressed: () {
controller.clear();
FocusScope.of(context).requestFocus(new FocusNode());
},
),
hintText: "Search...",
),
controller: controller,
)),
new Expanded(
child: new Padding(
padding: new EdgeInsets.only(top: 8.0),
child: _buildListView()),
)
],
));
}
Widget _buildListView() {
return ListView.builder(
itemCount: countries.length,
itemBuilder: (BuildContext context, int index) {
if (filter == null || filter == "") {
return _buildRow(countries[index]);
} else {
if (countries[index].countryName
.toLowerCase()
.contains(filter.toLowerCase())) {
return _buildRow(countries[index]);
} else {
return new Container();
}
}
});
}
Widget _buildRow(Country c) {
return new ListTile(
title: new Text(
c.countryName,
),
subtitle: new Text(
c.countryCode,
));
}
}
answered 23 hours ago
SnakeyHips
1959
SnakeyHips you misunderstood my question. My dropdown button inside a ListView, and I assign my data to my dropdown button. I am looking way so I can search or filter the dropdown button with user interaction.
– Nick
23 hours ago
add a comment |
up vote
0
down vote
One way is to use a TextEditingController to filter your ListView like this:
class YourPage extends StatefulWidget {
@override
State createState() => YourPageState();
}
class YourPageState extends State<YourPage> {
List<Country> countries = new List<Country>();
TextEditingController controller = new TextEditingController();
String filter;
@override
void initState() {
super.initState();
//fill countries with objects
controller.addListener(() {
setState(() {
filter = controller.text;
});
});
}
@override
void dispose() {
super.dispose();
controller.dispose();
}
@override
Widget build(BuildContext context) {
return new Material(
color: Colors.transparent,
child: new Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
new Padding(
padding: new EdgeInsets.only(top: 8.0, left: 16.0, right: 16.0),
child: new TextField(
style: new TextStyle(fontSize: 18.0, color: Colors.black),
decoration: InputDecoration(
prefixIcon: new Icon(Icons.search),
suffixIcon: new IconButton(
icon: new Icon(Icons.close),
onPressed: () {
controller.clear();
FocusScope.of(context).requestFocus(new FocusNode());
},
),
hintText: "Search...",
),
controller: controller,
)),
new Expanded(
child: new Padding(
padding: new EdgeInsets.only(top: 8.0),
child: _buildListView()),
)
],
));
}
Widget _buildListView() {
return ListView.builder(
itemCount: countries.length,
itemBuilder: (BuildContext context, int index) {
if (filter == null || filter == "") {
return _buildRow(countries[index]);
} else {
if (countries[index].countryName
.toLowerCase()
.contains(filter.toLowerCase())) {
return _buildRow(countries[index]);
} else {
return new Container();
}
}
});
}
Widget _buildRow(Country c) {
return new ListTile(
title: new Text(
c.countryName,
),
subtitle: new Text(
c.countryCode,
));
}
}
answered 23 hours ago
SnakeyHips
1959
SnakeyHips you misunderstood my question. My dropdown button inside a ListView, and I assign my data to my dropdown button. I am looking way so I can search or filter the dropdown button with user interaction.
– Nick
23 hours ago
add a comment |
up vote
0
down vote
up vote
0
down vote
One way is to use a TextEditingController to filter your ListView like this:
class YourPage extends StatefulWidget {
@override
State createState() => YourPageState();
}
class YourPageState extends State<YourPage> {
List<Country> countries = new List<Country>();
TextEditingController controller = new TextEditingController();
String filter;
@override
void initState() {
super.initState();
//fill countries with objects
controller.addListener(() {
setState(() {
filter = controller.text;
});
});
}
@override
void dispose() {
super.dispose();
controller.dispose();
}
@override
Widget build(BuildContext context) {
return new Material(
color: Colors.transparent,
child: new Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
new Padding(
padding: new EdgeInsets.only(top: 8.0, left: 16.0, right: 16.0),
child: new TextField(
style: new TextStyle(fontSize: 18.0, color: Colors.black),
decoration: InputDecoration(
prefixIcon: new Icon(Icons.search),
suffixIcon: new IconButton(
icon: new Icon(Icons.close),
onPressed: () {
controller.clear();
FocusScope.of(context).requestFocus(new FocusNode());
},
),
hintText: "Search...",
),
controller: controller,
)),
new Expanded(
child: new Padding(
padding: new EdgeInsets.only(top: 8.0),
child: _buildListView()),
)
],
));
}
Widget _buildListView() {
return ListView.builder(
itemCount: countries.length,
itemBuilder: (BuildContext context, int index) {
if (filter == null || filter == "") {
return _buildRow(countries[index]);
} else {
if (countries[index].countryName
.toLowerCase()
.contains(filter.toLowerCase())) {
return _buildRow(countries[index]);
} else {
return new Container();
}
}
});
}
Widget _buildRow(Country c) {
return new ListTile(
title: new Text(
c.countryName,
),
subtitle: new Text(
c.countryCode,
));
}
}
answered 23 hours ago
SnakeyHips
1959
One way is to use a TextEditingController to filter your ListView like this:
class YourPage extends StatefulWidget {
@override
State createState() => YourPageState();
}
class YourPageState extends State<YourPage> {
List<Country> countries = new List<Country>();
TextEditingController controller = new TextEditingController();
String filter;
@override
void initState() {
super.initState();
//fill countries with objects
controller.addListener(() {
setState(() {
filter = controller.text;
});
});
}
@override
void dispose() {
super.dispose();
controller.dispose();
}
@override
Widget build(BuildContext context) {
return new Material(
color: Colors.transparent,
child: new Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
new Padding(
padding: new EdgeInsets.only(top: 8.0, left: 16.0, right: 16.0),
child: new TextField(
style: new TextStyle(fontSize: 18.0, color: Colors.black),
decoration: InputDecoration(
prefixIcon: new Icon(Icons.search),
suffixIcon: new IconButton(
icon: new Icon(Icons.close),
onPressed: () {
controller.clear();
FocusScope.of(context).requestFocus(new FocusNode());
},
),
hintText: "Search...",
),
controller: controller,
)),
new Expanded(
child: new Padding(
padding: new EdgeInsets.only(top: 8.0),
child: _buildListView()),
)
],
));
}
Widget _buildListView() {
return ListView.builder(
itemCount: countries.length,
itemBuilder: (BuildContext context, int index) {
if (filter == null || filter == "") {
return _buildRow(countries[index]);
} else {
if (countries[index].countryName
.toLowerCase()
.contains(filter.toLowerCase())) {
return _buildRow(countries[index]);
} else {
return new Container();
}
}
});
}
Widget _buildRow(Country c) {
return new ListTile(
title: new Text(
c.countryName,
),
subtitle: new Text(
c.countryCode,
));
}
}
answered 23 hours ago
SnakeyHips
1959
answered 23 hours ago
SnakeyHips
1959
answered 23 hours ago
SnakeyHips
1959
answered 23 hours ago
SnakeyHips
1959
1959
SnakeyHips you misunderstood my question. My dropdown button inside a ListView, and I assign my data to my dropdown button. I am looking way so I can search or filter the dropdown button with user interaction.
– Nick
23 hours ago
add a comment |
SnakeyHips you misunderstood my question. My dropdown button inside a ListView, and I assign my data to my dropdown button. I am looking way so I can search or filter the dropdown button with user interaction.
– Nick
23 hours ago
SnakeyHips you misunderstood my question. My dropdown button inside a ListView, and I assign my data to my dropdown button. I am looking way so I can search or filter the dropdown button with user interaction.
– Nick
23 hours ago
SnakeyHips you misunderstood my question. My dropdown button inside a ListView, and I assign my data to my dropdown button. I am looking way so I can search or filter the dropdown button with user interaction.
– Nick
23 hours ago
add a comment |
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