I got syntax error _header How I fix this? - android

This Picture for easy to lookWhat is syntax error some people can tell me please after I put connectionstate for check now this phone is connect to internet in this problem is _header,_inputField and _forgotpassword
if (snapshot.connectionState == ConnectionState.done) {
return Form(
key: formKey,
child: Scaffold(
body: Container(
margin: EdgeInsets.all(24),
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
_header(context),
_inputField(context),
_forgotPassword(context),
],
),
),
),
);
}

Related

Why cant i add Listview to Flutter ? (The relevant error-causing widget was Column)

When I try to add listview, its always gives me errors. Like:
RenderBox was not laid out: RenderRepaintBoundary#dab18 NEEDS-LAYOUT NEEDS-PAINT
Failed assertion: line 1982 pos 12 : 'hasSize'
The relevant error-causing widget was Column
I tried to add shrinkwrap to listview but it doesn't work too. When I delete my listview its works fine but I need to add it. What am I making wrong? Thanks for all your help! My code :
SliverToBoxAdapter(
child: Container(
child: Column(children: [
Container(
width: double.infinity,
child: Stack(
children: [
CorneredImage(
child: Image(
image: AssetImage(
'assets/images/phone-call.png',
),
),
),
Positioned.fill(
child: Container(
decoration: //some decors
),
),
Positioned.fill(
child: Container(
alignment: Alignment.topLeft,
child: Padding(
padding: const EdgeInsets.all(24),
child: FractionallySizedBox(
widthFactor: 0.7,
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.max,
children: [
Flexible(
child: Column(
children: [
Text(
"Dilediğiniz Yerden Bağlanın!",
),
SizedBox(height: 10),
Text(
"Terapizone, ihtiyacınız olduğu her an size destek olmak için yanınızda!",
),
],
),
),
Align(
alignment: Alignment.bottomLeft,
child: ElevatedButton(
onPressed: () {},
child: Text("Terapiye Başla"),
)
],
),
),
),
),
)
],
),
),
Flexible( //When I add that part its not working anymore. List is simple String list
child: ListView.builder(
itemCount: list.length,
itemBuilder: (context, index) => Text(list[index]))),
]),
),
),

Try This,
CustomScrollView( // Wrap SliverToBoxAdapter with CustomScrollView
shrinkWrap: true,
slivers: <Widget>[
SliverToBoxAdapter(
child: Container(
child: Column(mainAxisSize: MainAxisSize.min, // give mainAxixsize
children: [
Container(
width: double.infinity,
child: Stack(
children: [
Image(
image: AssetImage(
'assets/images/phone-call.png',
),
),
Positioned.fill(
child: Container(
alignment: Alignment.topLeft,
child: Padding(
padding: const EdgeInsets.all(24),
child: FractionallySizedBox(
widthFactor: 0.7,
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.max,
children: [
Expanded(
child: Column(
children: [
Text(
"Dilediğiniz Yerden Bağlann!",
),
SizedBox(height: 10),
Text(
"Terapizone, ihtiyacnz olduğu her an size destek olmak için yannzda!",
),
],
),
),
Align(
alignment: Alignment.bottomLeft,
child: ElevatedButton(
onPressed: () {},
child: Text("Terapiye Başla"),
))
],
),
),
),
),
)
],
),
),
Flexible( //When I add that part its not working anymore. List is simple String list
child: ListView.builder(
itemCount: list.length,
itemBuilder: (context, index) => Text(list[index]))),
]),
),
),
// SizedBox(height: 1) // <-- Divider
],
)

How to fix overflow in flutter

here is my app
as you can see working well, I installed this on my phone, and it works fine too.
and I send this to my friend, and his phone showing like this
mine and his phone is same phone, literally same phone, but in his and any others phone is showing this overflow, mine and this emulator have no problem, how do i fix overflow problem
class Homescreen extends StatelessWidget {
const Homescreen({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
appBar: AppBar(
title: const Text("Pluto Guess Game"),
backgroundColor: Colors.white60,
),
body: Container(
color: Colors.white,
child: SafeArea(
child: ListView(
children: [
Card(
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
PlayerWidget(
player: messi
),
PlayerWidget(
player: neymar
)
],
),
),
Card(
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
PlayerWidget(
player: mbappe
)
PlayerWidget(
player: ramos
)
],
),
),
Card(
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
PlayerWidget(
player: messi
),
PlayerWidget(
player: neymar
)
],
),
),
Card(
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
PlayerWidget(
player: messi
),
PlayerWidget(
player: neymar
)
],
),
),
Card(
child: IconButton(
icon: const Icon(Icons.gesture),
iconSize: 50,
color: Colors.black,
splashColor: Colors.orange,
onPressed: () {
Navigator.of(context).push(
MaterialPageRoute(
builder: (nav) {
return const Asking();
},
),
);
},
),
),
],
),
),
),
),
);
}
}
and also I'm new at flutter, I know I'm doing lot of mistake in this code please suggest that also

->Use This Code
Widget build(BuildContext context) {
double h = MediaQuery.of(context).size.height;
double w = MediaQuery.of(context).size.width;
return Scaffold(
appBar: getAppBar(context, "Back", "", []),
body: SafeArea(
top: true,
bottom: true,
child: Column(
children: [
Expanded(
child: ListView.builder(
shrinkWrap: true,
physics: BouncingScrollPhysics(),
itemCount: 15,
itemBuilder: (context,v){
return
Container(
padding: EdgeInsets.only(left: 15.0,right: 15.0),
child: Column(
children: [
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Container(
height: h*0.2,
width: w*0.4,
decoration: BoxDecoration(
color: Colors.red,
borderRadius: BorderRadius.circular(25.0)
),
),
Container(
height: h*0.2,
width: w*0.4,
decoration: BoxDecoration(
color: Colors.black38,
borderRadius: BorderRadius.circular(25.0)
),
),
],
),
SizedBox(height: 15.0,),
Divider(
color: Colors.black,
),
SizedBox(height: 15.0,),
],
),
);
}),
)
],
),
),
);
}

Without your code I can't make corrections to the current code. but if you need responsive UI that work regardless of screen size, I suggest you use Rows, Columns with Expanded Widget, as necessary.
for example if you need to have 2 Items inside a Row where each occupies same space you can use,
Row (
children: [
Expanded (
flex:1
child: YourWidget()
),
Expanded (
flex:1
child: YourWidget()
)
]
)
Remember to remove hardcoded size properties along the main axis of your Colum or Row.
Same goes for Columns.
If you need each to have varied sizes, you can use flex property of the Expanded Widget. for example, one items has 1/3 of width and other has 2/3 you can put 1 and 2 as flex values.
more explanation from flutter team: Expanded

Run the ontap() gesture on the card in flutter

I have been trying to run the onTap() function from material package of flutter but it seems to throw me this error:
"The following assertion was thrown while handling a gesture:
Navigator operation requested with a context that does not include a Navigator."
I am in need of running this function to reach out to the called function of new screen in the application.
The code is below:
class _HomePageState extends State<dashboardpage> {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: Stack(
children: <Widget>[
Container(
height:130*.99,
decoration: BoxDecoration(
image: DecorationImage(
alignment: Alignment.center,
image: AssetImage('assets/bismillah.png'),fit: BoxFit.fitHeight,
)
),
),
SafeArea(
child: Padding(
padding: EdgeInsets.only(top: 0),
child: Column(
children:<Widget> [
Container(
height: 100.0,
child: Row(
children:<Widget> [
Center(
child: SizedBox(
width: 90.0,
),
),
Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.end
)
],
),
),
Expanded(
child:GridView.count(
mainAxisSpacing: 10,
crossAxisSpacing: 10,
primary: false,
crossAxisCount: 2,
children: <Widget>[
Padding(
padding: const EdgeInsets.only(top: 60),
child: InkWell(
child: Card(
child: Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Image.asset('assets/images/kafiroun/kafirun.jpg',height: 80),
Text('सूरा अल काफिरून',style: TextStyle(fontWeight: FontWeight.bold,color: Colors.black87))
]
),
),
shape:RoundedRectangleBorder(borderRadius: BorderRadius.circular(12.0)
),
elevation: 5.0,
),
onTap:(){
Navigator.push(context, MaterialPageRoute(builder: (context)=> kafiroun()));
},
)
),
),
),
)
]
);
}
}
This is the code specimen and the code is stuck on onTap() line.
Please help me!

Use GestureDetector
GestureDetector(onTap:(){
Navigator.push(context, MaterialPageRoute(builder: (context)=> kafiroun()));
},
child: Padding(
padding: const EdgeInsets.only(top: 60),
child: InkWell(
child: Card(
child: Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Image.asset('assets/images/kafiroun/kafirun.jpg',height: 80),
Text('सूरा अल काफिरून',style: TextStyle(fontWeight: FontWeight.bold,color: Colors.black87))
]
),
),
shape:RoundedRectangleBorder(borderRadius: BorderRadius.circular(12.0)
),
elevation: 5.0,
),
)
),
)

Widget that i called doesn't show in flutter column

the widget that i call in method doesn't show in output , problem is app , has no warning or error , but still doesn't show widget that map in a column...
i try to set a container for column or other ways to show somthing...
the widget :
return Container(
width: double.infinity,
height: 300,
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: tr.map((trElemEnt) {
Card(
elevation: 5,
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
CircleAvatar(
radius: 20,
child: Text(
trElemEnt.price.toString(),
),
),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
trElemEnt.title,
style: TextStyle(fontWeight: FontWeight.bold),
),
Text(
trElemEnt.date.toString(),
style: TextStyle(fontSize: 10, color: Colors.grey),
)
],
)
],
),
);
}).toList()),
);
} ```
call :
```#override
Widget build(BuildContext context) {
return Column(
children: <Widget>[
trMaker(tr),
],
);
}
} ```
[--OUTPUT--][1]
[1]: https://i.stack.imgur.com/8dOrJ.png

The problem is you are not returning anything in the map.
Try replacing this part:
...
tr.map((trElemEnt) {
Card(...);
}
...
with this:
...
tr.map((trElemEnt) {
return Card(...);
}
...

Must ListView.Builder widget be placed on a separate page or not

I am having problem displaying results using ListView.Builder widget. When i placed it on the main.dart page no matter what i do, the page constantly coming up with render errors. Immediately i put it in a separate page, it displayed correctly without error. The page(main.dart) display perfectly without any error without the listView.builder.
My question is it possible or otherwise to display ListView.Builder alongside other widgets on the same page or must it be displayed on a separate page?
Any help will be appreciated.
body: TabBarView(
children: <Widget>[
SingleChildScrollView(
child: Column(
children: <Widget>[
Container(
// child: SingleChildScrollView(
// scrollDirection: Axis.vertical,
child:Container(
child: Column(
//crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Container(
child:Expanded(
child: Image.asset("assets/images/1frenchToast.webp"),
),
),
],
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
Text("Select Cuisine",style: TextStyle(color: Colors.black),),
GestureDetector(
child: DropdownButton(
//isDense: true,
style: TextStyle(fontSize: 14,color: Colors.black,),
value: dropDownSelectedItemState,
items: items,
onChanged: (String selectValue){
ClassHub().mySharedPreference("cuisineChoice", "set", selectValue);
ClassHub().getFoodCategory(selectValue).then((onValue){
if(onValue !=null){
setState(() {
foodCategory = onValue;
});
}
});
setState(() {
dropDownSelectedItemState = selectValue;
});
},
),
onLongPress: (){
},
),
],
),
// This is the portion causing issues
Column(
//mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
//myListView(),
Container(
child: ListView.builder(scrollDirection: Axis.vertical,
itemCount: foodCategory.length
itemBuilder: (context,index){
return ListTile(
title: Text(foodCategory[index].foodType),
);
},
),
),
]
),
Container(
//height: 20,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
Container(
margin: EdgeInsets.only(top: 20,),
height: 60,
width: MediaQuery.of(context).size.width-20,
child: ListTile(
leading: CircleAvatar(
minRadius: 10,
maxRadius: 30,
//child:Image.asset("assets/images/Capture.JPG",height: 60,width: 60,),
//borderRadius: BorderRadius.circular(30),
backgroundImage: ExactAssetImage('assets/images/Capture.JPG'),
),
title: Text("Western Food Recipes"),
),
),
],
),
Container(
height: 10,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
Container(
height: 60,
width: MediaQuery.of(context).size.width-20,
child:ListTile(
leading: Image.asset("assets/images/Capture.JPG"),
// borderRadius: BorderRadius.circular(30),
// ),
title: Text("African Food Recipes"),
),
),
],
),
Container(
height: 10,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
Container(
height: 60,
width: MediaQuery.of(context).size.width-20,
child:ListTile(
leading: Image.asset("assets/images/Capture.JPG"),
// borderRadius: BorderRadius.circular(30),
// ),
title: Text("African Food Recipes"),
),
),
],
),
],
),
),
// ),
),
],
),
),
I want to be able to display ListView.Builder widget on the same page with other widgets without any render error. Is this possible or not?

What you need is shrinkWrap = true inside ListView.builder.
Else the children will wont know how much space to take in the scrollable widget.

you must have to pass the builder_context and use this is ListView.Builder function it might help you

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