Flutter layout issue in ios devices, messed up layout in iOS devices - dart

I'm having a very weird problem with a layout. I've created a screen that is working absolutely fine in all android devices but when I run same code on iOS devices its it's messed up, am attaching screenshots of android and iOS. Here is the code for this screen. Same issue am facing in one more screen where I am having column in card widget. Please help me with this.
class _AddMoneyState extends State<AddMoney> {
#override
Widget build(BuildContext context) {
final theme = Theme.of(context);
final Size size = MediaQuery.of(context).size;
return Scaffold(
appBar: new AppBar(
title: new Text('Add Money',
style: const TextStyle(color: Colors.white),),
),
body: new Container(
child: new ListView(
children: <Widget>[
new Container(
width: double.infinity,
height: 150.0,
padding: const EdgeInsets.all(10.0),
child: new Card(
elevation:5.0,
child: new Center(
child: new Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new SizedBox(height: 30.0,),
new Text('ADD MONEY',
style: const TextStyle(color: Colors.blueGrey,
fontSize: 20.0),),
new Container(
width: 100.0,
child: new TextField(
keyboardType: TextInputType.number,
textAlign: TextAlign.center,
decoration: const InputDecoration(
hintText: 'Enter amount'
),
),
),
new SizedBox(height:10.0),
new Text('USD', style:
const TextStyle(color: Colors.blue,
fontSize: 20.0),),
],
),
),
),
),
new SizedBox(height: 5.0,),
new Container(
width: double.infinity,
height: 350.0,
padding: const EdgeInsets.all(10.0),
child: new Card(
elevation:5.0,
child: new Center(
child: new Column(
children: <Widget>[
new SizedBox(height: 10.0,),
new Text('CARD / BANK',
style: const TextStyle(fontSize: 16.0),),
new Text('DETAILS',
style: const TextStyle(fontSize: 16.0)),
new Container(
padding: const EdgeInsets.only(left: 60.0, right: 60.0),
child: new Form(
key: _formKey,
child: new Column(
children: <Widget>[
new Theme(
data: theme.copyWith(primaryColor: Colors.blue),
child: new TextFormField(
keyboardType: TextInputType.number,
style: const TextStyle(color: Colors.black),
decoration: new InputDecoration(
labelText: 'CARD NUMBER',
labelStyle: const TextStyle(color: Colors.grey,
fontSize: 12.0)
),
validator: (val) {
return val.isEmpty
? "Please enter card number"
: null;
},
onSaved: (String value) {
this.card_number = value;
// this._data.email = value;
}
),
),
new Theme(
data: theme.copyWith(primaryColor: Colors.blue),
child: new TextFormField(
keyboardType: TextInputType.number,
style: const TextStyle(color: Colors.black),
decoration: new InputDecoration(
labelText: 'CVV/SECURITY CODE',
labelStyle: const TextStyle(color: Colors.grey,
fontSize: 12.0)
),
validator: (val) {
return val.isEmpty
? "Please enter card number"
: null;
},
onSaved: (String value) {
this.card_number = value;
// this._data.email = value;
}
),
),
new Row(
children: <Widget>[
new Flexible(
child: new Theme(
data: theme.copyWith(primaryColor: Colors.blue),
child: new TextFormField(
keyboardType: TextInputType.number,
style: const TextStyle(color: Colors.black),
decoration: new InputDecoration(
labelText: 'MONTH',
labelStyle: const TextStyle(color: Colors.grey,
fontSize: 12.0)
),
validator: (val) {
return val.isEmpty
? "Please enter month"
: null;
},
onSaved: (String value) {
this.card_number = value;
// this._data.email = value;
}
),
),
),
new SizedBox(width: 10.0,),
new Flexible(
child: new Theme(
data: theme.copyWith(primaryColor: Colors.blue),
child: new TextFormField(
keyboardType: TextInputType.number,
style: const TextStyle(color: Colors.black),
decoration: new InputDecoration(
labelText: 'YEAR',
labelStyle: const TextStyle(color: Colors.grey,
fontSize: 12.0)
),
validator: (val) {
return val.isEmpty
? "Please enter month"
: null;
},
onSaved: (String value) {
this.card_number = value;
// this._data.email = value;
}
),
),
),
],
),
],
),
),
),
new Container(
padding: const EdgeInsets.only(left: 40.0),
child: new Row(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
new Checkbox(value: isCheck, onChanged: (bool value) {
setState(() {
isCheck = value;
});
}),
new Text("SAVE THIS CARD FOR FASTER CHECKOUT",
style: const TextStyle(fontSize: 10.0),),
],
),
),
new Container(
//width: size.width,
child: new RaisedButton(
child: new Text(
'ADD MONEY',
style: new TextStyle(
color: Colors.white
),
),
onPressed: (){
//sentMoney();
//print(Utils.token);
},
color: Colors.blueAccent,
),
margin: new EdgeInsets.only(
top: 5.0
),
),
],
),
),
),
),
],
),
),
);
}
}
Here is the logcat:
flutter: A RenderFlex overflowed by 3.4028234663852886e+38 pixels on
the bottom.
flutter:
flutter: The overflowing RenderFlex has an orientation of
Axis.vertical.
flutter: The edge of the RenderFlex that is overflowing has been marked in the rendering with a yellow and
flutter: black striped pattern. This is usually caused by the contents being too big for the RenderFlex.
flutter: Consider applying a flex factor (e.g. using an Expanded widget) to force the children of the
flutter: RenderFlex to fit within the available space instead of being sized to their natural size.
flutter: This is considered an error condition because it indicates that there is content that cannot be
flutter: seen. If the content is legitimately bigger than the available space, consider clipping it with a
flutter: ClipRect widget before putting it in the flex, or using a scrollable container rather than a Flex,
flutter: like a ListView.
flutter: The specific RenderFlex in question is:
flutter: RenderFlex#34c92 relayoutBoundary=up1 OVERFLOWING
flutter: creator: Column ← Center ← DefaultTextStyle ← AnimatedDefaultTextStyle ←
flutter: _InkFeatures-[GlobalKey#0628f ink renderer] ← NotificationListener<LayoutChangedNotification> ←
flutter: CustomPaint ← _ShapeBorderPaint ← PhysicalShape ← _MaterialInterior ← Material ← Padding ← ⋯
flutter: parentData: offset=Offset(118.0, 0.0) (can use size)
flutter: constraints: BoxConstraints(0.0<=w<=347.0, 0.0<=h<=122.0)
flutter: size: Size(111.0, 122.0)
flutter: direction: vertical
flutter: mainAxisAlignment: center
flutter: mainAxisSize: max
flutter: crossAxisAlignment: center
flutter: verticalDirection: down
flutter:
◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤
flutter:
════════════════════════════════════════════════════════════════════════════════════════════════════
Here are the screenshots

I got the issue, I was overriding fonts and the fonts that I was using were working perfectly in android but in iOS it was not working. I just commented this line in main.dart --
//fontFamily: 'DINLightAlternate'
And now its working fine in iOS devices too.

Related

why my listview is not updating with setstate

here in below code i have list of widgets and used in listview iam adding widgets with list.add()in setstate also the list not updating i dont know what's happening . why my list is not updating
Here is below code
class EditorPageState extends State<EditorPage> {
List<Widget> obj = List<Widget>();
GlobalKey formkey= GlobalKey<FormState>();
#override
Widget build(BuildContext context) {
obj.add( TextFormField(
textCapitalization: TextCapitalization.sentences,
maxLength: 50,
decoration: InputDecoration(
labelText: "TITLE",
hintText: "UR ARTICLE NAME"
),
));
obj.add(TextFormField(decoration: InputDecoration(
labelText: "Article's Propic",
hintText: "Only image Url is Accepted"
),));
return Scaffold(
appBar: AppBar(title: Text("data"),),
body: Form(
key: formkey,
child:Stack(
children: <Widget>[
Padding(
padding: const EdgeInsets.only(bottom: 50),
child: ListView(
shrinkWrap: true,
children: obj
),
),
Container(
height: MediaQuery.of(context).size.height,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
SizedBox(),
Container(
alignment: Alignment.bottomCenter,
height: 50,width: MediaQuery.of(context).size.width,
color: Colors.black38,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
IconButton(icon: Icon(Icons.format_bold),color: Colors.white,onPressed: (){
setState(() {
obj.add(TextFormField(
style: TextStyle(fontWeight: FontWeight.bold),
decoration: InputDecoration(
labelText: "heading"
),
));
});
},),
IconButton(icon: Icon(Icons.add),
onPressed: (){
setState(() {
obj.add(TextFormField(
style: TextStyle(fontWeight: FontWeight.bold),
decoration: InputDecoration(
labelText: "Start again here"
),
));
});
}
),
IconButton(icon: Icon(Icons.add_a_photo),
onPressed: (){
}
),
IconButton(icon: Icon(Icons.delete),
onPressed: (){
},
)
],
),
),
],
),
),
],
),
),
);
}
}
the above code is of statefulwidget ad it is fullscreen dialog
thats it can i know why my list is not updated
Well you will need implement a ListViewBuilder to do this and please, split your layout creation your build method isn't readable. I make some changes in your layout to be more readable and the source code has some comments to help you get what I changed. I hope it can help and also you can adapt this code to your needs.
class EditorPageState extends State<EditorPage> {
List<Widget> obj = List<Widget>();
GlobalKey formkey= GlobalKey<FormState>();
#override
Widget build(BuildContext context) {
obj.add( TextFormField(
textCapitalization: TextCapitalization.sentences,
maxLength: 50,
decoration: InputDecoration(
labelText: "TITLE",
hintText: "UR ARTICLE NAME"
),
));
obj.add(TextFormField(decoration: InputDecoration(
labelText: "Article's Propic",
hintText: "Only image Url is Accepted"
),));
return Scaffold(
appBar: AppBar(title: Text("data"),),
//you can use this property to easily create a bottom navigation
bottomNavigationBar: _buildBottomNavigator(), // this method return BottomNavigation layout
body: Padding(
padding: EdgeInsets.symmetric(horizontal: 16.0),
child: Form(
key: formkey,
/// here your question answer... you need implemet a listView builder
/// in every build this will create a new ListView getting itens of a especific list
child : ListView.builder(
itemCount: obj.length, // number of items in your list
//here the implementation of itemBuilder. take a look at flutter docs to see details
itemBuilder: (BuildContext context, int Itemindex){
return obj[Itemindex]; // return your widget
}),
),
),
);
}
//create your bottom navigation layout
Widget _buildBottomNavigator(){
return Container(
color: Colors.black54,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
IconButton(icon: Icon(Icons.format_bold),color: Colors.white,onPressed: (){
setState(() {
obj.add(TextFormField(
style: TextStyle(fontWeight: FontWeight.bold),
decoration: InputDecoration(
labelText: "heading"
),
));
});
},),
IconButton(icon: Icon(Icons.add),
onPressed: (){
print("on pressed");
setState(() {
obj.add( TextFormField(
style: TextStyle(fontWeight: FontWeight.bold),
decoration: InputDecoration(
labelText: "Start again here"
),
));
});
}
),
IconButton(icon: Icon(Icons.add_a_photo),
onPressed: (){
}
),
IconButton(icon: Icon(Icons.delete),
onPressed: (){
},
)
],
),
);
}

Flutter - Implementing a listView search feature

I've been trying to implement a search bar into my app for bringing selected listView items to the top of a list. The list contains quite a few items, around approximately 1700 so the addition of a search bar is essential. I'd like the listView search box to appear from a search icon on the right hand side of the top appBar. Below is a picture of the current view for reference.
When you click the search iconButton a search field should replace the title in the appBar. It's going to be evident to the user that this is for the crypto listView as I'll add a hint in the search view identifying this.
I'm not including all my code as this would be cumbersome for a stack question, but below is my home_page.dart file, where as the rest of my classes for the bottom crypto listView can be found at this GitHub repo.
This is what my 'home_page.dart` looks like;
import 'package:cryptick/cryptoData/crypto_data.dart';
import 'package:cryptick/cryptoData/trending_data.dart';
import 'package:cryptick/modules/crypto_presenter.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'background.dart';
//FOLLOWING DART CODE COPYRIGHT OF 2017 - 2018 SQUARED SOFTWARE LONDON
class HomePage extends StatefulWidget {
#override
_HomePageState createState() => new _HomePageState();
}
class ServerStatusScreen extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
iconTheme: new IconThemeData(color: Colors.white),
centerTitle: true,
backgroundColor: Colors.black,
title: new Text(
'API Server Status',
textAlign: TextAlign.center,
style: new TextStyle(
color: Colors.white, fontSize: 27.5, fontFamily: 'Kanit'),
),
),
body: new Center(
child: new Column(
children: [
new Divider(color: Colors.white),
new Text(
'News Feed: ',
textAlign: TextAlign.center,
style: new TextStyle(
color: Colors.black,
fontSize: 27.5,
fontFamily: 'Kanit',
),
),
new Divider(),
new Text(
'Crypto Feed: ',
textAlign: TextAlign.center,
style: new TextStyle(
color: Colors.black,
fontSize: 27.5,
fontFamily: 'Kanit',
),
),
new Divider(),
new Wrap(
alignment: WrapAlignment.center,
children: <Widget>[
new Chip(
backgroundColor: Colors.black,
label: new Text(
'© 2017-2018 Squared Software',
style: new TextStyle(
fontSize: 15.0,
fontFamily: 'Poppins',
color: Colors.white,
),
),
),
],
),
],
),
),
);
}
}
class MoreInfoScreen extends StatelessWidget {
#override
Widget build(BuildContext context) {
final ThemeData themeData = Theme.of(context);
final TextStyle aboutTextStyle = themeData.textTheme.body2;
final TextStyle linkStyle =
themeData.textTheme.body2.copyWith(color: themeData.accentColor);
return new Scaffold(
appBar: new AppBar(
iconTheme: new IconThemeData(color: Colors.white),
centerTitle: true,
backgroundColor: Colors.black,
title: new Text(
'More Info',
textAlign: TextAlign.center,
style: new TextStyle(
color: Colors.white, fontSize: 27.5, fontFamily: 'Kanit'),
),
),
body: new Center(
child: new Column(
children: [
new Divider(color: Colors.white),
new ListTile(
title: new Text('Squared Software',
style: new TextStyle(
fontWeight: FontWeight.w500,
fontFamily: 'Poppins',
)
),
leading: new CircleAvatar(
radius: 30.0,
backgroundImage: new AssetImage(
'images/sqinterlock.png'
)
)
),
new Divider(),
new Text('Where do we get our information?',
style: new TextStyle(
color: Colors.black,
fontFamily: 'Poppins',
fontSize: 16.5,
)
),
new Divider(color: Colors.white),
new Text(
"News Feed: bit.ly/2MFpzHX",
style: new TextStyle(
fontFamily: 'Poppins',
fontSize: 16.5,
),
),
new Divider(color: Colors.white),
new Text(
"Crypto Feed: bit.ly/2iIdJht",
style: new TextStyle(
fontFamily: 'Poppins',
fontSize: 16.5,
),
),
new Divider(color: Colors.white),
new Wrap(
alignment: WrapAlignment.center,
children: <Widget>[
new Chip(
backgroundColor: Colors.black,
label: new Text(
'© 2017-2018 Squared Software',
style: new TextStyle(
fontSize: 15.0,
fontFamily: 'Poppins',
color: Colors.white,
),
),
),
],
),
],
),
),
);
}
}
class _HomePageState extends State<HomePage> implements CryptoListViewContract {
CryptoListPresenter _presenter;
List<Crypto> _currencies;
bool _isLoading;
final List<MaterialColor> _colors = [Colors.blue, Colors.indigo, Colors.red];
_HomePageState() {
_presenter = new CryptoListPresenter(this);
}
#override
void onLoadTrendingComplete(Trending trending) {
// TODO:
articlesMap = trending.articles;
for (Map articleMap in articlesMap) {
articles.add(Articles.fromMap(articleMap));
}
if (mounted) setState(() {});
}
#override
void onLoadTrendingError() {
// TODO:
}
List articlesMap = [];
List<Articles> articles = [];
#override
void initState() {
super.initState();
_isLoading = true;
_presenter.loadCurrencies();
_presenter.loadTrending();
}
#override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text(
"Cryp - Tick Exchange",
style: new TextStyle(
color: Colors.white,
fontFamily: 'Poppins',
fontSize: 22.5,
),
),
iconTheme: new IconThemeData(color: Colors.white),
backgroundColor: const Color(0xFF273A48),
elevation: 0.0,
centerTitle: true,
),
drawer: new Drawer(
child: new ListView(padding: EdgeInsets.zero, children: <Widget>[
new DrawerHeader(
child: new CircleAvatar(
child: new Image.asset('images/ctavatar.png'),
),
decoration: new BoxDecoration(
color: Colors.black,
),
),
new MaterialButton(
child: new Text(
'Server Status',
textAlign: TextAlign.center,
style: new TextStyle(fontSize: 27.5, fontFamily: 'Kanit'),
),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => ServerStatusScreen()),
);
}),
new Divider(),
new MaterialButton(
child: new Text(
'More Info',
textAlign: TextAlign.center,
style: new TextStyle(fontSize: 27.5, fontFamily: 'Kanit'),
),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) => MoreInfoScreen()),
);
}),
new Divider(),
new Wrap(
alignment: WrapAlignment.center,
children: <Widget>[
new Chip(
backgroundColor: Colors.black,
label: new Text(
'v0.0.1',
style: new TextStyle(
fontSize: 15.0,
fontFamily: 'Poppins',
color: Colors.white,
),
),
),
],
),
]),
),
body: _isLoading
? new Center(child: new CupertinoActivityIndicator(radius: 15.0))
: _allWidget());
}
Widget _allWidget() {
final _width = MediaQuery.of(context).size.width;
final _height = MediaQuery.of(context).size.height;
//CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED
final headerList = new ListView.builder(
itemBuilder: (context, index) {
EdgeInsets padding = index == 0
? const EdgeInsets.only(
left: 20.0, right: 10.0, top: 4.0, bottom: 30.0)
: const EdgeInsets.only(
left: 10.0, right: 10.0, top: 4.0, bottom: 30.0);
return new Padding(
padding: padding,
child: new InkWell(
onTap: () {
print('#url');
},
child: new Container(
decoration: new BoxDecoration(
borderRadius: new BorderRadius.circular(10.0),
color: const Color(0xFF273A48),
boxShadow: [
new BoxShadow(
color: Colors.black.withAlpha(70),
offset: const Offset(3.0, 10.0),
blurRadius: 15.0)
],
image: new DecorationImage(
image: new NetworkImage(articles[index].urlToImage),
fit: BoxFit.fitHeight,
),
),
height: 200.0,
width: 275.0,
child: new Stack(
children: <Widget>[
new Align(
alignment: Alignment.bottomCenter,
child: new Container(
padding: new EdgeInsets.only(left: 10.0),
decoration: new BoxDecoration(
color: const Color(0xFF273A48),
borderRadius: new BorderRadius.only(
bottomLeft: new Radius.circular(10.0),
bottomRight: new Radius.circular(10.0)),
),
height: 50.0,
child: new Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Expanded(child: new Text(
articles[index].title,
overflow: TextOverflow.ellipsis,
maxLines: 2,
style: new TextStyle(
color: Colors.white,
fontFamily: 'Poppins',
),
),
),
],
)
),
)
],
),
),
),
);
},
scrollDirection: Axis.horizontal,
itemCount: articles.length,
);
final body = new Scaffold(
backgroundColor: Colors.transparent,
body: new Container(
child: new Stack(
children: <Widget>[
new Padding(
padding: new EdgeInsets.only(top: 10.0),
child: new Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
new Align(
alignment: Alignment.centerLeft,
child: new Padding(
padding: new EdgeInsets.only(
left: 10.0,
),
child: new Text(
"Trending News",
style: new TextStyle(
letterSpacing: 0.8,
fontFamily: 'Kanit',
fontSize: 17.5,
color: Colors.white,
),
)),
),
new Container(
height: 300.0, width: _width, child: headerList),
new Expanded(child: ListView.builder(
itemBuilder: (BuildContext context, int index) {
final int i = index;
final Crypto currency = _currencies[i];
final MaterialColor color = _colors[i % _colors.length];
return new ListTile(
title: new Column(
children: <Widget>[
new Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
new Container(
height: 72.0,
width: 72.0,
decoration: new BoxDecoration(
color: Colors.white,
boxShadow: [
new BoxShadow(
color: Colors.black.withAlpha(80),
offset: const Offset(2.0, 2.0),
blurRadius: 15.0)
],
borderRadius: new BorderRadius.all(
new Radius.circular(35.0)),
image: new DecorationImage(
image: new ExactAssetImage(
"cryptoiconsBlack/" +
currency.symbol.toLowerCase() +
"#2x.png",
),
fit: BoxFit.cover,
)),
),
new SizedBox(
width: 8.0,
),
new Expanded(
child: new Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
new Text(
currency.name,
style: new TextStyle(
fontSize: 15.0,
fontFamily: 'Poppins',
color: Colors.black87,
fontWeight: FontWeight.bold),
),
_getSubtitleText(currency.price_usd,
currency.percent_change_1h),
],
)),
],
),
new Divider(),
],
),
);
}))
],
),
),
],
),
),
);
return new Container(
decoration: new BoxDecoration(
color: const Color(0xFF273A48),
),
child: new Stack(
children: <Widget>[
new CustomPaint(
size: new Size(_width, _height),
painter: new Background(),
),
body,
],
),
);
}
// CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED CRYPTO FEED
Widget _getSubtitleText(String priceUSD, String percentageChange) {
TextSpan priceTextWidget = new TextSpan(
text: "\$$priceUSD\n",
style: new TextStyle(
color: Colors.black,
fontSize: 14.0,
));
String percentageChangeText = "1 hour: $percentageChange%";
TextSpan percentageChangeTextWidget;
if (double.parse(percentageChange) > 0) {
percentageChangeTextWidget = new TextSpan(
text: percentageChangeText,
style: new TextStyle(
color: Colors.green,
fontFamily: 'PoppinsMediumItalic',
));
} else {
percentageChangeTextWidget = new TextSpan(
text: percentageChangeText,
style: new TextStyle(
color: Colors.red,
fontFamily: 'PoppinsMediumItalic',
));
}
return new RichText(
text: new TextSpan(
children: [priceTextWidget, percentageChangeTextWidget]));
}
//Works with cryptoListViewContract implimentation in _MyHomePageState
#override
void onLoadCryptoComplete(List<Crypto> items) {
// TODO: implement onLoadCryptoComplete
setState(() {
_currencies = items;
_isLoading = false;
});
}
#override
void onLoadCryptoError() {
// TODO: implement onLoadCryptoError
}
}
Thanks for the help, Jake
There are probably many ways to implement this based on the resulting experience you want. A simple solution is to create activeSearch state that toggles a 'search app bar' and a 'normal app bar'
Here's the normal app bar:
return AppBar(
title: Text("My App"),
actions: <Widget>[
IconButton(
icon: Icon(Icons.search),
onPressed: () => setState(() => activeSearch = true),
),
],
);
And here's the search app bar:
return AppBar(
leading: Icon(Icons.search),
title: TextField(
decoration: InputDecoration(
hintText: "here's a hint",
),
),
actions: <Widget>[
IconButton(
icon: Icon(Icons.close),
onPressed: () => setState(() => activeSearch = false),
)
],
);
Note: if you don't want to have a leading icon when search is active you may want to disable the default behavior for a drawer and back button icon with:
automaticallyImplyLeading: false
Full example:
class MyApp extends StatefulWidget {
#override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
bool activeSearch;
#override
void initState() {
super.initState();
activeSearch = false;
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: _appBar(),
drawer: _drawer(),
);
}
PreferredSizeWidget _appBar() {
if (activeSearch) {
return AppBar(
leading: Icon(Icons.search),
title: TextField(
decoration: InputDecoration(
hintText: "here's a hint",
),
),
actions: <Widget>[
IconButton(
icon: Icon(Icons.close),
onPressed: () => setState(() => activeSearch = false),
)
],
);
} else {
return AppBar(
title: Text("My App"),
actions: <Widget>[
IconButton(
icon: Icon(Icons.search),
onPressed: () => setState(() => activeSearch = true),
),
],
);
}
}
Widget _drawer() {
return Container();
}
}
UPDATE: Here's a hint at handling results
return AppBar(
...
title: TextField(
onChanged: _search,
),
);
And what _search could look like:
List<MyResultObject> _results;
void _search(String queryString) {
// do some searching and sorting
// then call setState() with the results
// and then in your ListView you can read from results
// (handle empty, default case as well in view)
setState(() {
_results = ...
});
}
List<Widget> _resultWidgets() {
if (_results.isEmpty) return _defaultWidgets();
_results.map((r) => _buildRowWidget(s)).toList();
}
Can u refer a simple search view in this answer. In that example, as the user types, the list will get filtered.

Card overlapping raised button in flutter

friends, I am thinking to make this type of view but I can't able to set the button overlapping like the given image I am using stack widget which is containing the text fields and the buttons as given image please check and help me out I also tried to use the center widgets as well but the view is coming as required in it also i had used the positioned widget but its getting button bottom of the screen like this but i need as the above image
MyLayoutDesign
class MyApp extends StatefulWidget {
#override
State<StatefulWidget> createState() {
MyAppState myAppState() => new MyAppState();
return myAppState();
}
}
class MyAppState extends State<MyApp> {
#override
Widget build(BuildContext context) {
return new MaterialApp(home: new Scaffold(body: new Builder(
builder: (BuildContext context) {
return new Stack(
children: <Widget>[
new Image.asset(
'assets/images/bg.png',
fit: BoxFit.cover,
),
new Center(
child: new Container(
child: new Card(
color: Colors.white,
elevation: 6.0,
margin: EdgeInsets.only(right: 15.0, left: 15.0),
child: new Wrap(
children: <Widget>[
Center(
child: new Container(
margin: EdgeInsets.only(top: 20.0),
child: new Text(
'Login',
style: TextStyle(
fontSize: 25.0, color: secondarycolor),
),
),
),
new ListTile(
leading: const Icon(Icons.person),
title: new TextFormField(
decoration: new InputDecoration(
hintText: 'Please enter email',
labelText: 'Enter Your Email address',
),
keyboardType: TextInputType.emailAddress,
),
),
new ListTile(
leading: const Icon(Icons.lock),
title: new TextFormField(
decoration: new InputDecoration(
hintText: 'Please enter password',
labelText: 'Enter Your Password',
),
keyboardType: TextInputType.emailAddress,
obscureText: true,
),
),
Container(
margin: EdgeInsets.only(top: 10.0, bottom: 15.0),
child: Center(
child: Text(
"FORGOT PASSWORD",
style: TextStyle(
decoration: TextDecoration.underline,
color: Colors.black,
fontSize: 16.0),
),
),
),
Center(
child: Container(
margin: EdgeInsets.only(bottom: 40.0, top: 10.0),
child: Text.rich(
TextSpan(
children: const <TextSpan>[
TextSpan(
text: 'NEW USER ? ',
style: TextStyle(
fontSize: 16.0, color: Colors.black)),
TextSpan(
text: 'REGISTER',
style: TextStyle(
fontSize: 16.0,
decoration: TextDecoration.underline,
color: Colors.black)),
],
),
),
),
),
],
),
),
),
),
new RaisedButton(
onPressed: () {
print('Login Pressed');
},
color: primarycolor,
shape: new RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(30.0)),
child: new Text('Login',
style: new TextStyle(
color: Colors.white,
fontSize: 16.0,
fontWeight: FontWeight.bold)),
),
],
);
},
)));
}
}
this is just one the many ways you can achieve the expected result.
In this case, i assume you know the height of the background.
Again, there are many ways to achieve what you want. There is nothing wrong with your code, you just have to get an understanding of how 'things' work in Flutter
Widget demo = Stack(
children: <Widget>[
//First thing in the stack is the background
//For the backgroud i create a column
Column(
children: <Widget>[
//first element in the column is the white background (the Image.asset in your case)
DecoratedBox(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(20.0),
color: Colors.white
),
child: Container(
width: 300.0,
height: 400.0,
)
),
//second item in the column is a transparent space of 20
Container(
height: 20.0
)
],
),
//for the button i create another column
Column(
children:<Widget>[
//first element in column is the transparent offset
Container(
height: 380.0
),
Center(
child: FlatButton(
color: Colors.red,
child: Text("Press Me"),
onPressed: () {},
),
)
]
)
],
);
Here you can find your solution code below.
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatefulWidget {
#override
State<StatefulWidget> createState() {
MyAppState myAppState() => new MyAppState();
return myAppState();
}
}
class MyAppState extends State<MyApp> {
#override
Widget build(BuildContext context) {
return new MaterialApp(home: new Scaffold(body: new Builder(
builder: (BuildContext context) {
return new Stack(
children: <Widget>[
new Image.asset(
'assets/images/bg.jpeg',
fit: BoxFit.fitWidth,
),
new Center(
child: new Container(
height: 370.0,
child: Container(
height:250.0,
child: new Card(
color: Colors.white,
elevation: 6.0,
margin: EdgeInsets.only(right: 15.0, left: 15.0),
child: new Wrap(
children: <Widget>[
Center(
child: new Container(
margin: EdgeInsets.only(top: 20.0),
child: new Text(
'Login',
style: TextStyle(
fontSize: 25.0, color: Colors.red),
),
),
),
new ListTile(
leading: const Icon(Icons.person),
title: new TextFormField(
decoration: new InputDecoration(
hintText: 'Please enter email',
labelText: 'Enter Your Email address',
),
keyboardType: TextInputType.emailAddress,
),
),
new ListTile(
leading: const Icon(Icons.lock),
title: new TextFormField(
decoration: new InputDecoration(
hintText: 'Please enter password',
labelText: 'Enter Your Password',
),
keyboardType: TextInputType.emailAddress,
obscureText: true,
),
),
Container(
margin: EdgeInsets.only(top: 10.0, bottom: 15.0),
child: Center(
child: Text(
"FORGOT PASSWORD",
style: TextStyle(
decoration: TextDecoration.underline,
color: Colors.black,
fontSize: 16.0),
),
),
),
Center(
child: Container(
margin: EdgeInsets.only(bottom: 40.0, top: 10.0),
child: Text.rich(
TextSpan(
children: const <TextSpan>[
TextSpan(
text: 'NEW USER ? ',
style: TextStyle(
fontSize: 16.0, color: Colors.black)),
TextSpan(
text: 'REGISTER',
style: TextStyle(
fontSize: 16.0,
decoration: TextDecoration.underline,
color: Colors.black)),
],
),
),
),
),
Padding(padding: EdgeInsets.only(left: 120.0)),
],
),
),
),
padding: EdgeInsets.only(bottom: 30),
),
),
new Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Padding(padding: EdgeInsets.only(top: 310.0)),
RaisedButton(
onPressed: () {
print('Login Pressed');
},
color: Colors.green,
shape: new RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(30.0)),
child: new Text('Login',
style: new TextStyle(
color: Colors.white,
fontSize: 16.0,
fontWeight: FontWeight.bold)),
),
],
)
)
],
);
},
)));
}
}
#ibhavikmakwana propsed a better solution to your question. The other answers all depend on the size of the background and are not screen independent. They both create an invisible object above the button (either by adding a Container or a Padding).
I was having that question too and did not find your question first.
His simple solution is to wrap the button in a Positioned widget and give it a bottom of 0 or < 0.
Positioned(
child: FlatButton(
color: Colors.red,
child: Text("Press Me"),
onPressed: () {},
),
right: 0,
left: 0,
bottom: 0,
)
I found out that the "bottom" attribute set to 0 will offset the widget by exactly 0.5*height of the widget.

Exception was thrown: FormatException: Invalid radix-10 number

I get this error when try to get an integer from TextFormFeild. I have used this widget many times but I did not get this error anytime. Does anybody know what it exactly means?
It will be a great help. The following is just a part of entire (1084 lines)code where I feel the error could be:
(Also I have initialized the controller:'bowlerIndexController = new TextEditingController(text: "");':/)....
void changeBowler(BuildContext context) {
showDialog(
context: context,
builder: (context) {
return new SimpleDialog(
title: new Text("Who is bowling next?",
style:
new TextStyle(fontSize: 18.0, fontWeight: FontWeight.bold)),
children: <Widget>[
new Column(
children: List<Widget>.generate(teamBowling.length, (index) {
return Padding(
padding: const EdgeInsets.all(8.0),
child: new Row(
children: <Widget>[
new Padding(
padding: new EdgeInsets.all(2.0),
child: new Text(
(index + 1).toString(),
style: new TextStyle(fontSize: 15.0),
),
),
new Text(teamBowling[index].player["Name"],
style: new TextStyle(
fontSize: 18.0, fontWeight: FontWeight.bold))
],
),
);
}),
),
new TextFormField(
keyboardType: new TextInputType.numberWithOptions(
signed: false, decimal: false),
decoration: new InputDecoration(
hintText: "Enter the bowler's corresponding number"),
controller: bowlerIndexController,
),
new RaisedButton(
child: new Text(
"DONE",
style: new TextStyle(color: Colors.black),
),
onPressed: () {
int a =
int.parse(bowlerIndexController.text.toString()) - 2;
if (a >= 0 && a < teamBowling.length) {
bowlerIndex = int.parse(bowlerIndexController.toString());
Navigator.pop(context);
}
})
],
);
});
}
The mistake was stupid. 🤷‍♀️ I did not convert the controller to text. I directly did from controller ==> String. I am keeping this question just in case anybody else has a similar query. 😜

TextSize not scale according to deviceSize or devicePixelRatio in flutter

I want to scale the text in my flutter application according to various devices size or devicePixelRatio value. I know flutter should scale text according to devicePixelRatio value, so I change my code in that way, but it's not working in my code.
Here is my code:
class MyHomePage extends StatefulWidget {
#override
MyHomePageState createState() => new MyHomePageState();
}
class MyHomePageState extends State<MyHomePage> {
#override
Widget build(BuildContext context) {
TextStyle style50 = new TextStyle(
inherit: true,
fontSize: 50.0,
color: Colors.white,
);
TextStyle style19 = new TextStyle(
inherit: true,
color: Colors.white,
fontSize: 19.0,
fontFamily: 'helvetica_neue',
);
TextStyle style15White = new TextStyle(
inherit: true,
color: Colors.white,
fontSize: 15.0,
fontFamily: 'helvetica_neue',
);
TextStyle style15Green = new TextStyle(
inherit: true,
color: Colors.green,
fontSize: 15.0,
fontFamily: 'helvetica_neue',
);
return new Scaffold(
body: new Container(
decoration: new BoxDecoration(
image: new DecorationImage(
image: new AssetImage("assets/images/home_page_background.png"),
fit: BoxFit.cover,
),
),
child: new Container(
child: new Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Container(
margin: new EdgeInsets.only(top: 160.0),
child: new Text(
'JAHMAIKA',
textAlign: TextAlign.center,
style: style50,
),
),
new Container(
margin: new EdgeInsets.only(top: 230.0),
child: new FlatButton(
child: new Container(
padding: new EdgeInsets.only(
left: 45.0, right: 45.0, top: 15.0, bottom: 15.0),
decoration: new BoxDecoration(
shape: BoxShape.rectangle,
borderRadius: new BorderRadius.all(
new Radius.elliptical(40.0, 50.0)),
border: new Border.all(
color: Colors.white,
),
),
child: new Text(
'Create an account',
style: style19,
),
),
onPressed: () {
Navigator.push(
context,
new MaterialPageRoute(
builder: (context) => new SignUpPage()),
);
}),
),
new Container(
margin: new EdgeInsets.only(top: 16.0),
child: new Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Container(
child: new Text(
'Already have an account?',
textAlign: TextAlign.center,
style: style15White,
),
),
new GestureDetector(
onTap: () {
Navigator.push(
context,
new MaterialPageRoute(
builder: (context) => new SignInPage()),
);
},
child: new Container(
margin: new EdgeInsets.only(left: 16.0),
child: new Text('Login',
textAlign: TextAlign.center, style: style15Green),
),
),
],
),
),
],
),
)),
);
}
}
But this is not working. There is no change in the text font size in various devices. Please help me.
Have you tried computing the fontSize based on a proportion of MediaQuery.of(context).size.width ?
Set the sizes using a base device, and use it's width to calculate the other devices proportional sizes.
...
Widget build(BuildContext context) {
// 414.0 is the width of an iPhone 7plus
double fs = 50.0 * MediaQuery.of(context).size.width / 414.0;
// print("MediaQuery.of(context).size.width=${MediaQuery.of(context).size.width}");
// print("fs=$fs");
TextStyle style50 = new TextStyle(
inherit: true,
fontSize: fs,
color: Colors.white,
);
...

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