I want to create a category selector with a gridview.
And I want them to have different sizes (Wrapping each).
To make gridview like below, What should I use.
Sorry for my English, and Thanks for your help.
use Wrap
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: Scaffold(
body: SafeArea(
child: MyHomePage(),
),
),
);
}
}
class MyHomePage extends StatelessWidget {
#override
Widget build(BuildContext context) {
var elements = [
'Android',
'Ios',
'Web front',
'Sever',
'Embedded Sofware',
'Design'
];
return Wrap(
children: elements.map((el) => _MyButton(name: el)).toList(),
);
}
}
class _MyButton extends StatelessWidget {
_MyButton({Key key, this.name}) : super(key: key);
final String name;
#override
Widget build(BuildContext context) {
return Container(
margin: EdgeInsets.all(5),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(10),
border: Border.all(
color: Colors.black,
width: 1,
style: BorderStyle.solid,
),
),
padding: EdgeInsets.all(20),
child: Text(name),
);
}
}
Related
Here is a demonstration of the problem:
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
#override
Widget build(BuildContext context) {
return const Scaffold(
body: Center(
child: Text(" hello ",
style: TextStyle(
fontSize: 100,
backgroundColor: Colors.green,
)),
),
);
}
}
It shows up like this:
So far I've tried this on web and macOS targets and got the same result.
How can I make the Text widget include the space at the end?
Here's what I mean.
class MyHomePage extends StatelessWidget {
#override
Widget build(BuildContext context) {
return const Scaffold(
body: Center(
child: Container(
color: Colors.green,
child: Text(" hello ",
style: TextStyle(
fontSize: 100,
backgroundColor: Colors.green,
))),
),
);
}
}
I have code like this
ClipRRect(
borderRadius:
BorderRadius.all(Radius.circular(100.0)),
child: Image.network(
image_link_from_api,
width: 100,
height: 100,
fit: BoxFit.fill,
),
),
I tried ClipRRect, avatar image, container with rounded corners, nothing seems to work, so how can I fill whole round image instead of something like this in above image?
I tried fill, cover, contain, every possible option
The effect of running your code:
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
#override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
ClipRRect(
borderRadius: const BorderRadius.all(Radius.circular(100.0)),
child: Image.network(
'https://i.ibb.co/37ZfCpQ/20230113213218image-thumbnail-media-433.jpg',
width: 100,
height: 100,
fit: BoxFit.fill,
),
),
],
),
),
);
}
}
I need to put a divider in a Column inside a Row but the divider does not appear. I saw some questions about the Row should not be used but in my case, I need the Row. Here is the simplest code, I need the divider to be shown
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
#override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Column(
children: const [
Text('up'),
Divider(
color: Colors.black,
thickness: 2,
),
Text('bottom'),
],
),
],
),
),
);
}
}
To get the divider to show, you need to warp your Divider() with a SizedBox() and define a set width. As well as removing const form the Column() since we're using MediaQuery:
SizedBox(
width: MediaQuery.of(context).size.width,
child: Divider(
color: Colors.black,
thickness: 2,
),
),
Result:
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp();
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({required this.title});
final String title;
#override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Column(
children: [
Text('up'),
SizedBox(
width: MediaQuery.of(context).size.width,
child: Divider(
color: Colors.black,
thickness: 2,
),
),
Text('bottom'),
],
),
],
),
),
);
}
}
While the structure is
Center
- Row
- Column
- Text
- Divider
- Text
This divider doesn't get any constrained and the result is invisible on UI.
Wrapping Divider with SizedBox provide the constraints, and we are able to see the divider. Also you can go for Expanded on Column widget.
body: Center(
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Expanded(
child: Column(
children: const [
Text('up'),
Divider(
color: Colors.green,
thickness: 2,
),
Text('bottom'),
],
),
),
],
),
),
I have a ListView consisting of several Cards how can I make it so that when the application starts, the order of these Cards in the ListView is random?
You can put all your elements you want to display in one list (if they are not already in a list) before generating the Cards and use the "shuffle" function:
https://api.flutter.dev/flutter/dart-core/List/shuffle.html
Random cards
I built a full working example for you:
import 'package:flutter/material.dart';
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',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
var imageNames = ["screen.png", "screen1.png", "screen2.png", "screen3.png", "screen4.png", "another_image.png"]; // you don't need to store the whole path
#override
void initState() {
imageNames.shuffle(); // shuffle your list of images
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: ListView(
padding: EdgeInsets.all(16),
children: [
for (String imageName in imageNames) // iterate over your list
buildImageCard('assets/images/$imageName'),
]
)));
}
}
Widget buildImageCard(String imagePath) => Card( // from https://stackoverflow.com/a/66893064/3161139
clipBehavior: Clip.antiAlias,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(24),
),
child: Column(
children: [
Stack(
children: [
Ink.image(
image: AssetImage(imagePath),
height: 240,
fit: BoxFit.cover,
),
Positioned(
bottom: 30,
right: 16,
left: 16,
child: Text(
'Interesting fact!',
style: TextStyle(
fontWeight: FontWeight.bold,
color: Colors.white,
fontSize: 24,
),
),
),
],
),
],
),
);
I am trying to develop a form using flutter and I need to change the border of my cupertinotextfield when the user focused on it.
You can copy paste run full code below
You can use onFocusChange of FocusScope to check focus and change BoxDecoration to what you need
code snippet
FocusScope(
child: Focus(
onFocusChange: (focus) {
if (focus) {
setState(() {
boxSetting = boxHasFocus;
});
} else {
setState(() {
boxSetting = defaultBoxSetting;
});
}
},
child: CupertinoTextField(
decoration: boxSetting, controller: _textController)))
working demo
full code
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
TextEditingController _textController;
BoxDecoration boxSetting;
BoxDecoration defaultBoxSetting = CupertinoTextField().decoration;
BoxDecoration boxHasFocus = BoxDecoration(
border: Border.all(color: Color(0xFFFFFF00), width: 0.5),
color: Color(0xFF9E9E9E),
shape: BoxShape.rectangle,
borderRadius: BorderRadius.circular((20.0)),
);
#override
void initState() {
_textController = TextEditingController(text: '');
boxSetting = defaultBoxSetting;
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.black,
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
FocusScope(
child: Focus(
onFocusChange: (focus) {
if (focus) {
setState(() {
boxSetting = boxHasFocus;
});
} else {
setState(() {
boxSetting = defaultBoxSetting;
});
}
},
child: CupertinoTextField(
decoration: boxSetting, controller: _textController))),
],
),
),
);
}
}