ListView.builder doesn't show anything - Flutter
When I'm, not using the ListView.builder constructor in Flutter, the individual item is shown as expected from the JSON API:
when I use ListView.builder, nothing shows up. no Error!
I also tried a listview with Texts only that doesn't seem to work either.
Here's the code:
@override
Widget build(BuildContext context) {
return Container(
child: new Scaffold(
appBar: AppBar(
title: Text("the title"),//TODO edit this
backgroundColor: Colors.blueAccent),
body:
Column(
children: <Widget>[
FutureBuilder<List<dynamic>>(
future: getPosts2(),
builder: (context, snapshot) {
if (snapshot.hasError) print(snapshot.error);
return snapshot.hasData
? ListViewPosts(postsFrom: snapshot.data)
: Center(child: CircularProgressIndicator());
},
),
],
),
),
);
}
}
And here is the ListViewPosts Stateless Widget:
class ListViewPosts extends
StatelessWidget {
final List<dynamic> postsFrom;
ListViewPosts({Key key,
this.postsFrom}) : super(key: key);
@override
Widget build(BuildContext context) {
return Column(
children: <Widget>[
FadeInImage.assetNetwork(
placeholder: 'assets/images/placeholder.png',
image: postsFrom[1]["featured_media"] == 0
? 'assets/images/placeholder.png'
: postsFrom[1]["_embedded"]["wp:featuredmedia"]
[0]["source_url"],
),
FadeInImage.assetNetwork(
placeholder: 'assets/images/placeholder.png',
image: postsFrom[2]["featured_media"] == 0
? 'assets/images/placeholder.png'
: postsFrom[2]["_embedded"]["wp:featuredmedia"]
[0]["source_url"],
),
new Row(
children: <Widget>[
Expanded(
child: Text(
"نووسهر: " +
postsFrom[1]["_embedded"]["author"][0]
["name"],
textAlign: TextAlign.right,
),
),
Expanded(
child: Text(
dateConvertor(
postsFrom[2]["date"].toString()),
textAlign: TextAlign.left,
),
),
],
),
ListView.builder(
itemCount: postsFrom.length, //== null ? 0 : postsFrom.length,
itemBuilder: (context, int index) {
Card(
child: Column(
children: <Widget>[
Text(postsFrom.toString()),
Container(
child: hawalImage(postsFrom, index),
),
new Padding(
padding: EdgeInsets.all(5.0),
child: new ListTile(
title: new Text("whatEver"),
subtitle: new Row(
children: <Widget>[
Expanded(
child: new Text(postsFrom[index]["title"]["rendered"]),
),
Expanded(
child: hawalDate(postsFrom, index),
),
],
),
),
),
new ButtonTheme.bar(
child: hawalBtnBar(),
),
],
),
);
},
),
dart 
flutter asked Nov 22 at 21:57
Hooshyar
113
add a comment |
When I'm, not using the ListView.builder constructor in Flutter, the individual item is shown as expected from the JSON API:
when I use ListView.builder, nothing shows up. no Error!
I also tried a listview with Texts only that doesn't seem to work either.
Here's the code:
@override
Widget build(BuildContext context) {
return Container(
child: new Scaffold(
appBar: AppBar(
title: Text("the title"),//TODO edit this
backgroundColor: Colors.blueAccent),
body:
Column(
children: <Widget>[
FutureBuilder<List<dynamic>>(
future: getPosts2(),
builder: (context, snapshot) {
if (snapshot.hasError) print(snapshot.error);
return snapshot.hasData
? ListViewPosts(postsFrom: snapshot.data)
: Center(child: CircularProgressIndicator());
},
),
],
),
),
);
}
}
And here is the ListViewPosts Stateless Widget:
class ListViewPosts extends
StatelessWidget {
final List<dynamic> postsFrom;
ListViewPosts({Key key,
this.postsFrom}) : super(key: key);
@override
Widget build(BuildContext context) {
return Column(
children: <Widget>[
FadeInImage.assetNetwork(
placeholder: 'assets/images/placeholder.png',
image: postsFrom[1]["featured_media"] == 0
? 'assets/images/placeholder.png'
: postsFrom[1]["_embedded"]["wp:featuredmedia"]
[0]["source_url"],
),
FadeInImage.assetNetwork(
placeholder: 'assets/images/placeholder.png',
image: postsFrom[2]["featured_media"] == 0
? 'assets/images/placeholder.png'
: postsFrom[2]["_embedded"]["wp:featuredmedia"]
[0]["source_url"],
),
new Row(
children: <Widget>[
Expanded(
child: Text(
"نووسهر: " +
postsFrom[1]["_embedded"]["author"][0]
["name"],
textAlign: TextAlign.right,
),
),
Expanded(
child: Text(
dateConvertor(
postsFrom[2]["date"].toString()),
textAlign: TextAlign.left,
),
),
],
),
ListView.builder(
itemCount: postsFrom.length, //== null ? 0 : postsFrom.length,
itemBuilder: (context, int index) {
Card(
child: Column(
children: <Widget>[
Text(postsFrom.toString()),
Container(
child: hawalImage(postsFrom, index),
),
new Padding(
padding: EdgeInsets.all(5.0),
child: new ListTile(
title: new Text("whatEver"),
subtitle: new Row(
children: <Widget>[
Expanded(
child: new Text(postsFrom[index]["title"]["rendered"]),
),
Expanded(
child: hawalDate(postsFrom, index),
),
],
),
),
),
new ButtonTheme.bar(
child: hawalBtnBar(),
),
],
),
);
},
),
asked Nov 22 at 21:57
Hooshyar
113
1
you dont return anything from youritemBuilder
– pskink
Nov 23 at 6:13
I'm returning snapshot data to my postsFrom variable .
– Hooshyar
Nov 23 at 11:43
no, you are not, but it seems you already know what to do...
– pskink
Nov 24 at 6:11
add a comment |
When I'm, not using the ListView.builder constructor in Flutter, the individual item is shown as expected from the JSON API:
when I use ListView.builder, nothing shows up. no Error!
I also tried a listview with Texts only that doesn't seem to work either.
Here's the code:
@override
Widget build(BuildContext context) {
return Container(
child: new Scaffold(
appBar: AppBar(
title: Text("the title"),//TODO edit this
backgroundColor: Colors.blueAccent),
body:
Column(
children: <Widget>[
FutureBuilder<List<dynamic>>(
future: getPosts2(),
builder: (context, snapshot) {
if (snapshot.hasError) print(snapshot.error);
return snapshot.hasData
? ListViewPosts(postsFrom: snapshot.data)
: Center(child: CircularProgressIndicator());
},
),
],
),
),
);
}
}
And here is the ListViewPosts Stateless Widget:
class ListViewPosts extends
StatelessWidget {
final List<dynamic> postsFrom;
ListViewPosts({Key key,
this.postsFrom}) : super(key: key);
@override
Widget build(BuildContext context) {
return Column(
children: <Widget>[
FadeInImage.assetNetwork(
placeholder: 'assets/images/placeholder.png',
image: postsFrom[1]["featured_media"] == 0
? 'assets/images/placeholder.png'
: postsFrom[1]["_embedded"]["wp:featuredmedia"]
[0]["source_url"],
),
FadeInImage.assetNetwork(
placeholder: 'assets/images/placeholder.png',
image: postsFrom[2]["featured_media"] == 0
? 'assets/images/placeholder.png'
: postsFrom[2]["_embedded"]["wp:featuredmedia"]
[0]["source_url"],
),
new Row(
children: <Widget>[
Expanded(
child: Text(
"نووسهر: " +
postsFrom[1]["_embedded"]["author"][0]
["name"],
textAlign: TextAlign.right,
),
),
Expanded(
child: Text(
dateConvertor(
postsFrom[2]["date"].toString()),
textAlign: TextAlign.left,
),
),
],
),
ListView.builder(
itemCount: postsFrom.length, //== null ? 0 : postsFrom.length,
itemBuilder: (context, int index) {
Card(
child: Column(
children: <Widget>[
Text(postsFrom.toString()),
Container(
child: hawalImage(postsFrom, index),
),
new Padding(
padding: EdgeInsets.all(5.0),
child: new ListTile(
title: new Text("whatEver"),
subtitle: new Row(
children: <Widget>[
Expanded(
child: new Text(postsFrom[index]["title"]["rendered"]),
),
Expanded(
child: hawalDate(postsFrom, index),
),
],
),
),
),
new ButtonTheme.bar(
child: hawalBtnBar(),
),
],
),
);
},
),
asked Nov 22 at 21:57
Hooshyar
113
When I'm, not using the ListView.builder constructor in Flutter, the individual item is shown as expected from the JSON API:
when I use ListView.builder, nothing shows up. no Error!
I also tried a listview with Texts only that doesn't seem to work either.
Here's the code:
@override
Widget build(BuildContext context) {
return Container(
child: new Scaffold(
appBar: AppBar(
title: Text("the title"),//TODO edit this
backgroundColor: Colors.blueAccent),
body:
Column(
children: <Widget>[
FutureBuilder<List<dynamic>>(
future: getPosts2(),
builder: (context, snapshot) {
if (snapshot.hasError) print(snapshot.error);
return snapshot.hasData
? ListViewPosts(postsFrom: snapshot.data)
: Center(child: CircularProgressIndicator());
},
),
],
),
),
);
}
}
And here is the ListViewPosts Stateless Widget:
class ListViewPosts extends
StatelessWidget {
final List<dynamic> postsFrom;
ListViewPosts({Key key,
this.postsFrom}) : super(key: key);
@override
Widget build(BuildContext context) {
return Column(
children: <Widget>[
FadeInImage.assetNetwork(
placeholder: 'assets/images/placeholder.png',
image: postsFrom[1]["featured_media"] == 0
? 'assets/images/placeholder.png'
: postsFrom[1]["_embedded"]["wp:featuredmedia"]
[0]["source_url"],
),
FadeInImage.assetNetwork(
placeholder: 'assets/images/placeholder.png',
image: postsFrom[2]["featured_media"] == 0
? 'assets/images/placeholder.png'
: postsFrom[2]["_embedded"]["wp:featuredmedia"]
[0]["source_url"],
),
new Row(
children: <Widget>[
Expanded(
child: Text(
"نووسهر: " +
postsFrom[1]["_embedded"]["author"][0]
["name"],
textAlign: TextAlign.right,
),
),
Expanded(
child: Text(
dateConvertor(
postsFrom[2]["date"].toString()),
textAlign: TextAlign.left,
),
),
],
),
ListView.builder(
itemCount: postsFrom.length, //== null ? 0 : postsFrom.length,
itemBuilder: (context, int index) {
Card(
child: Column(
children: <Widget>[
Text(postsFrom.toString()),
Container(
child: hawalImage(postsFrom, index),
),
new Padding(
padding: EdgeInsets.all(5.0),
child: new ListTile(
title: new Text("whatEver"),
subtitle: new Row(
children: <Widget>[
Expanded(
child: new Text(postsFrom[index]["title"]["rendered"]),
),
Expanded(
child: hawalDate(postsFrom, index),
),
],
),
),
),
new ButtonTheme.bar(
child: hawalBtnBar(),
),
],
),
);
},
),
asked Nov 22 at 21:57
Hooshyar
113
asked Nov 22 at 21:57
Hooshyar
113
asked Nov 22 at 21:57
Hooshyar
113
asked Nov 22 at 21:57
Hooshyar
113
asked Nov 22 at 21:57
Hooshyar
113
113
1
you dont return anything from youritemBuilder
– pskink
Nov 23 at 6:13
I'm returning snapshot data to my postsFrom variable .
– Hooshyar
Nov 23 at 11:43
no, you are not, but it seems you already know what to do...
– pskink
Nov 24 at 6:11
add a comment |
1
you dont return anything from youritemBuilder
– pskink
Nov 23 at 6:13
I'm returning snapshot data to my postsFrom variable .
– Hooshyar
Nov 23 at 11:43
no, you are not, but it seems you already know what to do...
– pskink
Nov 24 at 6:11
1
1
you dont return anything from your
itemBuilder– pskink
Nov 23 at 6:13
you dont return anything from your
itemBuilder– pskink
Nov 23 at 6:13
I'm returning snapshot data to my postsFrom variable .
– Hooshyar
Nov 23 at 11:43
I'm returning snapshot data to my postsFrom variable .
– Hooshyar
Nov 23 at 11:43
no, you are not, but it seems you already know what to do...
– pskink
Nov 24 at 6:11
no, you are not, but it seems you already know what to do...
– pskink
Nov 24 at 6:11
add a comment |
2 Answers
2
active
oldest
votes
You have to write return Card at the beginning of the curly brackets in the builder function. Also I would be cautious with using Expanded there, it might cause some errors.
Also you put a ListView inside a Column without defining it's height, so it will take up space indefinitely. Wrap it in a widget that provides height constraints(SizedBox, Expanded, ...)
answered Nov 23 at 13:34
01leo
348111
thanks, buddy, me being a noob and not returning the card :-*
– Hooshyar
Nov 23 at 14:30
add a comment |
You have to write return Card at the beginning of the curly brackets in the builder function. Also I would be cautious with using Expanded there, it might cause some errors.
answered Nov 23 at 7:49
01leo
348111
I have tried with return Card , also without Expanded. I have tried one with only text elements but still, nothing shows up.
– Hooshyar
Nov 23 at 11:44
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
You have to write return Card at the beginning of the curly brackets in the builder function. Also I would be cautious with using Expanded there, it might cause some errors.
Also you put a ListView inside a Column without defining it's height, so it will take up space indefinitely. Wrap it in a widget that provides height constraints(SizedBox, Expanded, ...)
answered Nov 23 at 13:34
01leo
348111
thanks, buddy, me being a noob and not returning the card :-*
– Hooshyar
Nov 23 at 14:30
add a comment |
You have to write return Card at the beginning of the curly brackets in the builder function. Also I would be cautious with using Expanded there, it might cause some errors.
Also you put a ListView inside a Column without defining it's height, so it will take up space indefinitely. Wrap it in a widget that provides height constraints(SizedBox, Expanded, ...)
answered Nov 23 at 13:34
01leo
348111
thanks, buddy, me being a noob and not returning the card :-*
– Hooshyar
Nov 23 at 14:30
add a comment |
You have to write return Card at the beginning of the curly brackets in the builder function. Also I would be cautious with using Expanded there, it might cause some errors.
Also you put a ListView inside a Column without defining it's height, so it will take up space indefinitely. Wrap it in a widget that provides height constraints(SizedBox, Expanded, ...)
answered Nov 23 at 13:34
01leo
348111
You have to write return Card at the beginning of the curly brackets in the builder function. Also I would be cautious with using Expanded there, it might cause some errors.
Also you put a ListView inside a Column without defining it's height, so it will take up space indefinitely. Wrap it in a widget that provides height constraints(SizedBox, Expanded, ...)
answered Nov 23 at 13:34
01leo
348111
answered Nov 23 at 13:34
01leo
348111
answered Nov 23 at 13:34
01leo
348111
answered Nov 23 at 13:34
01leo
348111
348111
thanks, buddy, me being a noob and not returning the card :-*
– Hooshyar
Nov 23 at 14:30
add a comment |
thanks, buddy, me being a noob and not returning the card :-*
– Hooshyar
Nov 23 at 14:30
thanks, buddy, me being a noob and not returning the card :-*
– Hooshyar
Nov 23 at 14:30
thanks, buddy, me being a noob and not returning the card :-*
– Hooshyar
Nov 23 at 14:30
add a comment |
You have to write return Card at the beginning of the curly brackets in the builder function. Also I would be cautious with using Expanded there, it might cause some errors.
answered Nov 23 at 7:49
01leo
348111
I have tried with return Card , also without Expanded. I have tried one with only text elements but still, nothing shows up.
– Hooshyar
Nov 23 at 11:44
add a comment |
You have to write return Card at the beginning of the curly brackets in the builder function. Also I would be cautious with using Expanded there, it might cause some errors.
answered Nov 23 at 7:49
01leo
348111
I have tried with return Card , also without Expanded. I have tried one with only text elements but still, nothing shows up.
– Hooshyar
Nov 23 at 11:44
add a comment |
You have to write return Card at the beginning of the curly brackets in the builder function. Also I would be cautious with using Expanded there, it might cause some errors.
answered Nov 23 at 7:49
01leo
348111
You have to write return Card at the beginning of the curly brackets in the builder function. Also I would be cautious with using Expanded there, it might cause some errors.
answered Nov 23 at 7:49
01leo
348111
answered Nov 23 at 7:49
01leo
348111
answered Nov 23 at 7:49
01leo
348111
answered Nov 23 at 7:49
01leo
348111
348111
I have tried with return Card , also without Expanded. I have tried one with only text elements but still, nothing shows up.
– Hooshyar
Nov 23 at 11:44
add a comment |
I have tried with return Card , also without Expanded. I have tried one with only text elements but still, nothing shows up.
– Hooshyar
Nov 23 at 11:44
I have tried with return Card , also without Expanded. I have tried one with only text elements but still, nothing shows up.
– Hooshyar
Nov 23 at 11:44
I have tried with return Card , also without Expanded. I have tried one with only text elements but still, nothing shows up.
– Hooshyar
Nov 23 at 11:44
add a comment |
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1
you dont return anything from your
itemBuilder– pskink
Nov 23 at 6:13
I'm returning snapshot data to my postsFrom variable .
– Hooshyar
Nov 23 at 11:43
no, you are not, but it seems you already know what to do...
– pskink
Nov 24 at 6:11