How to scroll page in flutter
My code for a page is like this. i need to scroll part below appbar.
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(... ),
body: new Stack(
children: <Widget>[
new Container(
decoration: BoxDecoration(
image: DecorationImage(...),
new Column(children: [
new Container(...),
new Container(...... ),
new Padding(
child: SizedBox(
child: RaisedButton(..),
),
new Divider(),
new Column(
children: <Widget>[
new Container(
child: new Row(
children: <Widget>[
new Expanded(
child: new Text( ),
),
new IconButton(
icon: IconButton(..),
onPressed: () {
_changed(true, "type");
},
),
],
),
),
visibilityPropertyType
? new Container(
margin: EdgeInsets.all(24.0),
child: new Column(
children: <Widget>[
new Row(
children: <Widget>[
new Expanded(... ),
new RaisedButton(..)
],
),
new Padding(
padding: const EdgeInsets.only(top: 10.0),
child: new Row(
mainAxisAlignment:
MainAxisAlignment.spaceEvenly,
children: <Widget>[
new Column(
children: <Widget>[
new Row(
children: <Widget>[.. ]),
new Row(
children: <Widget>[]),
new Row(
children: <Widget>[]),
new Row(
children: <Widget>[],
),
new Column(
children: <Widget>[
new Row(
children: <Widget>[],
),
],
),
],
),
),
],
))
: new Container(),
],
),
new Divider(
color: Colors.white,
)
])
],
),
);
}
I need to make body part scrollable. How can i implement that scroll.
If there is any custom scroll method existing. i have tried Scrollable and SingleChildScrollView but does not meet up with my needs.
When i used SinglechildScrollView it occurs an error BoxConstraints forces an infinite height. if i removed LayoutBuilder it causes A RenderFlex overflowed by 22 pixels on the bottom error
Solution 1:
Wrap your widget tree inside a SingleChildScrollView
body: SingleChildScrollView(
child: Stack(
children: <Widget>[
new Container(
decoration: BoxDecoration(
image: DecorationImage(...),
new Column(children: [
new Container(...),
new Container(...... ),
new Padding(
child: SizedBox(
child: RaisedButton(..),
),
....
...
); // Single child scroll view
Remember, SingleChildScrollView can only have one direct widget (Just like ScrollView in Android)
Solution 2:
Thanks guys for help. From your suggestions i reached a solution like this.
new LayoutBuilder(
builder:
(BuildContext context, BoxConstraints viewportConstraints) {
return SingleChildScrollView(
child: ConstrainedBox(
constraints:
BoxConstraints(minHeight: viewportConstraints.maxHeight),
child: Column(children: [
// remaining stuffs
]),
),
);
},
)
Solution 3:
Two way to add Scroll in page
1. Using SingleChildScrollView :
SingleChildScrollView(
child: Column(
children: [
Container(....),
SizedBox(...),
Container(...),
Text(....)
],
),
),
2. Using ListView : ListView is default provide Scroll no need to add extra widget for scrolling
ListView(
children: [
Container(..),
SizedBox(..),
Container(...),
Text(..)
],
),
Solution 4:
You can try CustomScrollView. Put your CustomScrollView inside Column Widget.
Just for example -
class App extends StatelessWidget {
App({Key key}): super(key: key);
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: AppBar(
title: const Text('AppBar'),
),
body: new Container(
constraints: BoxConstraints.expand(),
decoration: new BoxDecoration(
image: new DecorationImage(
alignment: Alignment.topLeft,
image: new AssetImage('images/main-bg.png'),
fit: BoxFit.cover,
)
),
child: new Column(
children: <Widget>[
Expanded(
child: new CustomScrollView(
scrollDirection: Axis.vertical,
shrinkWrap: false,
slivers: <Widget>[
new SliverPadding(
padding: const EdgeInsets.symmetric(vertical: 0.0),
sliver: new SliverList(
delegate: new SliverChildBuilderDelegate(
(context, index) => new YourRowWidget(),
childCount: 5,
),
),
),
],
),
),
],
)),
);
}
}
In above code I am displaying a list of items ( total 5) in CustomScrollView.
YourRowWidget widget gets rendered 5 times as list item. Generally you should render each row based on some data.
You can remove decoration property of Container widget, it is just for providing background image.