I tried Flutter to take pictures from cloudinary, and I used the resize app for Flutter to avoid the large size of the app, using flutter build apk --split-per-abi but when the app is installed the app doesn't take pictures like it does when I did the test directly with without debugging
import 'package:faker/faker.dart';
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
var faker = new Faker();
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('Test Scroll'),
),
body: Scrollbar(
child: ListView.builder(
padding: EdgeInsets.all(15),
itemCount: 1000,
itemBuilder: (context, index) {
return Container(
height: 200,
padding: EdgeInsets.symmetric(vertical: 10),
child: Row(
children: [
Container(
child: Image.network(
'https://res.cloudinary.com/tmart/image/upload/v1673656769/xnmqxoeruaq2yddwevpk.jpg'),
),
Container(
child: Text(faker.person.name()),
),
],
),
);
},
)),
),
);
}
}
Using this package, you can identify errors
https://pub.dev/packages/cached_network_image
Row(
children: [
Container(
child:
CachedNetworkImage(
imageUrl: "https://res.cloudinary.com/tmart/image/upload/v1673656769/xnmqxoeruaq2yddwevpk.jpg",
progressIndicatorBuilder: (context, url, downloadProgress) =>
CircularProgressIndicator(value: downloadProgress.progress),
errorWidget: (context, url, error) => Icon(Icons.error),
),
Container(
child: Text(faker.person.name()),
),
],
),
Related
I am wanting to get the list of data from the cloud firestore. I have setup everything. With the following code, i am just able to get one data instead of all the list. And I am getting the following error :
Bad state: field does not exist within the DocumentSnapshotPlatform
class HomePage extends StatefulWidget {
static const routeName = 'homePage';
#override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
late String id;
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Latest"),
backgroundColor: Colors.black,
),
body: StreamBuilder<QuerySnapshot>(
stream: FirebaseFirestore.instance.collection("latest").orderBy('number',descending: true).snapshots(),
builder: (context, snapshot) {
return !snapshot.hasData
? Center(child: CircularProgressIndicator())
: ListView.builder(
itemCount: snapshot.data!.docs.length,
itemBuilder: (context, index) {
DocumentSnapshot data = snapshot.data!.docs[index];
return Stack(
alignment: Alignment.topCenter,
fit: StackFit.loose,
clipBehavior: Clip.hardEdge,
children: [
GestureDetector(
child: Container(
height: 200,
width: MediaQuery.of(context).size.width,
child: Card(
child: Center(
child: Row(
mainAxisAlignment:
MainAxisAlignment.spaceBetween,
children: [
Text(
data['name'],
textAlign: TextAlign.start,
style: const TextStyle(
color: Colors.indigo,
fontWeight: FontWeight.bold,
),
),
])),
)),
onTap: () {
},
)
],
// ),
);
},
);
},
),
);
}
}
I think you should check the document fields name and also make sure all the fields exist in all documents.
The Parent Widget Is Column,
Column Contains the following children:
STACK
CONTAINER(CHILD: ROW)
ROW(CHILDREN: [GESTUREDETECTOR(child:Container), GESTUREDETECTOR(child:Container)]
LISTVIEW BUILDER
Wrapping this column with expanded, and then with singlechildScrollView. The result is the error!!
WHAT TO DO??
Wrap Column with SinglechildScrollView, for ListView.builder you need to set:
physics: NeverScrollableScrollPhysics(),
shrinkWrap: true,
In your case widget tree will look like this (minimal reproducible sample)
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'SingleChildScrollView',
home: Scaffold(
appBar: AppBar(
title: Text('SingleChildScrollView Example'),
),
body: SingleChildScrollView(
child: Column(
children: [
Stack(
children: [
Container(
width: 50,
height: 50,
color: Colors.cyan,
),
],
),
Container(
child: Row(
children: [
GestureDetector(
child: Container(
width: 50,
height: 50,
color: Colors.green,
),
),
GestureDetector(
child: Container(
width: 50,
height: 50,
color: Colors.blue,
),
),
],
),
),
ListView.builder(
physics: NeverScrollableScrollPhysics(),
shrinkWrap: true,
itemCount: 60,
itemBuilder: (context, index) => Text('Item # $index'),
)
],
),
)),
);
}
}
And it scrolls.
How to prevent the first widget (ListView) from beeing scrolled?
The idea is to scroll SomeList, but the most top ListView widget should remain unscrollable.
body: ListView(
children: <Widget>[
ListView(
shrinkWrap: true,
children: <Widget>[
ListTile( // how to prevet this widget from beeing scrolled?
title: Container(
height: 30,
child: Row(...),
),
),
],
),
SomeList(), // builds ListView.separated( ...
],
),
updated:
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(title: 'Flutter Demo', home: MyListView());
}
}
class MyListView extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('AppBar'),
),
body: ListView(
children: <Widget>[
ListView(
physics: const NeverScrollableScrollPhysics(),
shrinkWrap: true,
children: <Widget>[
ListTile(
title: Container(
height: 30,
color: Colors.black45,
child: Row(
children: const <Widget>[
Expanded(child: Text('Some header')),
],
),
),
),
],
),
RapportList(),
],
),
);
}
}
class RapportList extends StatefulWidget {
#override
_RapportListState createState() => _RapportListState();
}
class _RapportListState extends State<RapportList> {
#override
Widget build(BuildContext context) {
return ListView.separated(
physics: const ScrollPhysics(),
shrinkWrap: true,
itemCount: 100,
itemBuilder: (context, index) {
return ListTile(
title: Row(
children: <Widget>[
Expanded(child: Text('$index')),
],
),
);
},
separatorBuilder: (context, index) {
return const Divider();
},
);
}
}
Solution is with Expended Widget,
use physics: NeverScrollableScrollPhysics(), too. here is full code:
class MyListView extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('AppBar'),
),
body: Container(
height: MediaQuery.of(context).size.height,
child: Column(
children: <Widget>[
Expanded(
flex:1,
child: ListView(
physics: const NeverScrollableScrollPhysics(),
shrinkWrap: true,
children: <Widget>[
ListTile(
title: Container(
height: 30,
color: Colors.black45,
child: Row(
children: const <Widget>[
Expanded(child: Text('Some header')),
],
),
),
),
],
),
),
Expanded(flex:9,child: RapportList()),
],
),
),
);
}
}
Use physics: const NeverScrollableScrollPhysics() in Listview Then you can prevent your widget from beeing scrolled.
I am a new flutter developer.I try to make listview to view a set of data that comes from the database.The list now works, but as follows:
Now it is not presented separately.I need to display every element in the card.An example of what I'm trying to do:
In this picture, each item on the card is separate and separated from the second.How I can do it?If anyone knows the solution please help me.
my code now like that:
#override
Widget build(BuildContext context) {
return Scaffold(
body: Column(
children: <Widget>[
Expanded(
child: Card(
child :FutureBuilder<List<Flowerdata>>(
future: fetchFlowers(),
builder: (context, snapshot) {
if (!snapshot.hasData) return Center(
child: CircularProgressIndicator()
);
return ListView(
children: snapshot.data
.map((data) => Column(children: <Widget>[
GestureDetector(
onTap: ()=>{
getItemAndNavigate(data.id, context)
},
child: Row(
children: [
Container(
width: 100,
height: 100,
margin: EdgeInsets.fromLTRB(10, 0, 10, 0),
child: ClipRRect(
borderRadius: BorderRadius.circular(8.0),
child:
Image.network(data.flowerImageURL,
width: 200, height: 100, fit: BoxFit.cover,))),
Flexible(child:
Text(data.flowerName,
style: TextStyle(fontSize: 18))
),
]),),
Divider(color: Colors.black),
],
))
.toList(),
);
},
)
),
),
]
)
);
}
You need to wrap your item's Column(not the FutureBuilder) in with Card
#override
Widget build(BuildContext context) {
return Scaffold(
body: Column(children: <Widget>[
Expanded(
child: FutureBuilder<List<Flowerdata>>(
future: fetchFlowers(),
builder: (context, snapshot) {
if (!snapshot.hasData)
return Center(child: CircularProgressIndicator());
return ListView(
children: snapshot.data
.map((data) => Card(
child: Column(
children: <Widget>[
GestureDetector(
onTap: () => {getItemAndNavigate(data.id, context)},
child: Row(children: [
Container(
width: 100,
height: 100,
margin: EdgeInsets.fromLTRB(10, 0, 10, 0),
child: ClipRRect(
borderRadius: BorderRadius.circular(8.0),
child: Image.network(
data.flowerImageURL,
width: 200,
height: 100,
fit: BoxFit.cover,
))),
Flexible(
child: Text(data.flowerName,
style: TextStyle(fontSize: 18))),
]),
),
Divider(color: Colors.black),
],
),
))
.toList(),
);
},
),
),
]));
}
Setup
Start a new Flutter project. I'm calling mine flutter_listview.
Open main.dart and replace the code with the following:
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
title: 'ListViews',
theme: ThemeData(
primarySwatch: Colors.teal,
),
home: Scaffold(
appBar: AppBar(title: Text('ListViews')),
body: BodyLayout(),
),
);
}
}
class BodyLayout extends StatelessWidget {
#override
Widget build(BuildContext context) {
return _myListView(context);
}
}
// replace this function with the code in the examples
Widget _myListView(BuildContext context) {
return ListView();
}
Note the _myListView() function at the end. You will be replacing this with the code in the examples below
Basic types of ListViews
Static ListView
If you have a short list of items that don't change, then you can use the default ListView constructor to make it. This is useful for making something like a settings menu page.
Replace _myListView() with the following:
Widget _myListView(BuildContext context) {
return ListView(
children: <Widget>[
ListTile(
title: Text('Sun'),
),
ListTile(
title: Text('Moon'),
),
ListTile(
title: Text('Star'),
),
],
);
}
Run the app and you should see the following image. (After this when refreshing, usually hot reload works fine, but I find at times I need to do a hot restart or even completely stop and restart the app.)
ListTile customization
The Flutter team designed the ListTile widget to handle the normal content that you would want in a list. This means that most of the time there is no need to define a custom layout. You can just use the default ListTile for each item in the list. When we made a ListView in the example above we only used the title option. But we can also show subtitles, images, and icons.
Replace _myListView() with the following
Widget _myListView(BuildContext context) {
return ListView(
children: <Widget>[
ListTile(
leading: Icon(Icons.wb_sunny),
title: Text('Sun'),
),
ListTile(
leading: Icon(Icons.brightness_3),
title: Text('Moon'),
),
ListTile(
leading: Icon(Icons.star),
title: Text('Star'),
),
],
);
}
The leading is for adding an icon or image at the start of the ListTile.
You can also add an icon at the end if you specify the trailing attribute.
ListTile(
leading: Icon(Icons.wb_sunny),
title: Text('Sun'),
trailing: Icon(Icons.keyboard_arrow_right),
)
The right arrow icon makes it look like the list items are clickable, but they aren't. Not yet. We will see how to add touch events in the next section. It's easy. (Hint: onTap )
Instead of icons, we can also use images. The recommended image option is to use a CircleAvatar widget.
Replace _myListView() with the following:
Widget _myListView(BuildContext context) {
return ListView(
children: <Widget>[
ListTile(
leading: CircleAvatar(
backgroundImage: AssetImage('assets/sun.jpg'),
),
title: Text('Sun'),
),
ListTile(
leading: CircleAvatar(
backgroundImage: AssetImage('assets/moon.jpg'),
),
title: Text('Moon'),
),
ListTile(
leading: CircleAvatar(
backgroundImage: AssetImage('assets/stars.jpg'),
),
title: Text('Star'),
),
],
);
}
If you want MASTERING FLUTTER LISTVIEWS enter link description here
in this sample code i want to put nested ListView inside SingleChildScrollView, but i get this error:
RenderBox was not laid out: RenderRepaintBoundary#8de00 relayoutBoundary=up1 NEEDS-PAINT
'package:flutter/src/rendering/box.dart':
Failed assertion: line 1694 pos 12: 'hasSize'
my code:
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'test',
home: Scaffold(
appBar: AppBar(
title: Text("Scrollview Demo"),
),
body: SingleChildScrollView(
child: Column(
children: <Widget>[
Container(
height: 50.0,
color: Colors.green,
child: Center(
child: Text('message'),
),
),
Expanded(
child: ListView.builder(
itemCount: 30,
itemBuilder: (context, index) {
return ListTile(title: Text("Index : $index"));
},
),
),
],
),
),
),
);
}
}
In ListView you can set
shrinkWrap: true
so that ListView only occupies the space it needed.
To disable the scrolling on ListView so it uses that of SingleChildScrollView you can set the
physics: NeverScrollableScrollPhysics().
You need to remove the Expanded which set the child to take the available screen in case of here is infinite.
Here:
SingleChildScrollView(
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Container(
height: 50.0,
color: Colors.green,
child: Center(
child: Text('message'),
),
),
Flexible(
child: ListView.builder(
itemCount: 30,
shrinkWrap: true,
itemBuilder: (context, index) {
return ListTile(title: Text("Index : $index"));
},
),
),
],
),
)
Instead of using SingleChildScrollView then use Column as the child just use ListView.
return Scaffold(
body: ListView(
children: <Widget>[
Container(
height: 104,
child: Card(
clipBehavior: Clip.antiAliasWithSaveLayer,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8.0),
),
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[],
),
),
),
ListView(
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
),
],
),
);
Ones I was in the same situation and did like that:
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'test',
home: Scaffold(
appBar: AppBar(
title: Text("Scrollview Demo"),
),
body: ListView.builder(
itemCount: 30 + 1,
itemBuilder: (context, index) {
if (index == 0) {
return Container(
height: 50.0,
color: Colors.green,
child: Center(
child: Text('message'),
),
);
}
return ListTile(title: Text('Index : ${index -1}'));
},
),
),
);
}
}