I'm new to flutter and am trying to stack a searchView on top of a ListView. I would Look something like this:
I don't know how to achieve this layout on flutter, i tried using a column(which crashes the app), used the a stack (which overlaps the widgets) and i finally tried to add a search widget a the first item of the ListView but that didn't result am looking for.
Widget build(BuildContext context) {
return new Scaffold(
drawer: _makeDrawer(),
appBar: new AppBar(
title: new Center(
child: new Text("translate"),
),
actions: <Widget>[
new IconButton(icon: new Icon(Icons.people_outline), onPressed: () {})
],
),
body: _phraseListFutureBuilder(), // this part of the code renders the listview
);
}
FutureBuilder _phraseListFutureBuilder() {
return new FutureBuilder(
builder: (BuildContext context, AsyncSnapshot snapshot) {
return mPhrases.isEmpty
? new CircularProgressIndicator()
: _buildPhrases();
},
future: _fetchData());
}
A Column was the right choice, but you will also need an Expanded widget to specify which widget should fill the remaining space:
Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
TextField(
decoration: InputDecoration(
labelText: 'Search'
),
),
Expanded(
child: _phraseListFutureBuilder(),
)
],
);
Related
I am very new to flutter and was just curious to know how can we create a new card widget everytime a button (lets say FAB) is clicked.
Suppose this is the card widget :
return Card(
child: Column(
children: [
Text('name'),
Text('standard'),
Text('Roll No'),
],
),
);
I want the cards to build with the same content everytime the FAB is clicked. Can someone help me with this ?
First declare a List of widget type
List<Widget> _cardList = [];
Then create your widget which you want to add on button click, e.g.
Widget _card() {
return Card(
child: Column(
children: [
Text('name'),
Text('standard'),
Text('Roll No'),
],
),
);
}
add your widget in List on button click
FloatingActionButton(
child: Icon(Icons.add),
onPressed: () {
setState(() {
_cardList.add(_card());
});
},
),
Now use a ListView.builder for create a list of widget
ListView.builder(
shrinkWrap: true,
itemCount: _cardList.length,
itemBuilder: (context, index) {
return _cardList[index];
},
)
I have an AlertDialog with icons in that are from cloud firestore. I am struggling to change the layout of the icons so that it looks normal. (1) is what is currently being shown and (2) is what I am wanting to achieve.
(1)
(2)
This is my code:
Widget _buildPopupDialog(BuildContext context) {
return Scaffold(
body: StreamBuilder(
stream: FirebaseFirestore.instance.collection('icons').snapshots(),
builder: (context, snapshot) {
return new AlertDialog(
content: SingleChildScrollView(
child: new Container(
height: 500,
width: 300,
child: new ListView(
children: snapshot.data.documents
.map<Widget>((DocumentSnapshot document) {
return new MoodButton(
iconData: (IconData(document.data()['ref'],
fontFamily: 'MaterialIcons')),
onTap: () => print("Mood"),
);
}).toList(),
)),
),
);
}));
Any help would be greatly appreciated!
You should use GridView instead of ListView. Set the crossAxisCount property to 3 and you should get the result you want. If you have any doubts, you can find GridView's doc here
i am green in flutter and i have quick question, would like to make retrieve two classes SearchBar() & HomeView(), but it only allows to retrieve one class. I understand that something is missing, i would like to hear your suggestions in order to learn it better.
return Scaffold(
appBar: AppBar(
title: Text(title),
actions: <Widget>[
IconButton(
icon: Icon(
Icons.add_box,
color: Colors.white,
),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
AddBookPage(uid: this.widget.uid)));
})
],
),
body: SearchBar(),
body: HomeView(),
drawer: NavigateDrawer(uid: this.widget.uid));
}
Here is the picture how i would like make it look like
I get Search Bar overflowed by Infinity pixels on the bottom
Use Column:
Scaffold(
body: Column(
children: [
SearchBar(),
SizedBox(height: 20),
Expanded(
child: HomeView(),
)
],
),
// ... your other code
)
Using a Column may be the best way.
The overflow error is probably caused by the SearchBar() widget not having a defined height. A Column widget can't have a child with infinite height.
How can I make the Rows inside a vertical ListView, scrollable horizontally.
This is what my app looks like:
I want the user to be able to scroll the ListView both horizontally (to see the contents of the Row) and vertically to see new list items. This behavior is like how you would scroll a DataTable in Flutter:
Here is the build method (based on the Flutter project template):
#override
Widget build(BuildContext context) {
final List<String> rows = [
"This is a row with some very long text ... That goes on and on",
"This class is the configuration for the state.",
"case the title) provided by the parent (in this case the App widget) and",
"always marked \"final\"."
];
return Scaffold(
appBar: AppBar(title: Text("ListView")),
body: ListView(
padding: EdgeInsets.all(10),
children: <Widget>[
for (final String row in rows)
Row(
children: <Widget>[Text(row)],
)
],
),
);
}
Update: Wrapping the Text in Expanded doesn't work as it causes the text to wrap onto multiple lines. I want the text to remain on a single line.
Finally
After a deep search found this finally
#override
Widget build(BuildContext context) {
return new Scaffold(
body: new SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: new SizedBox(
width: 1000.0,
child: new ListView.builder(
itemBuilder: (BuildContext context, int i) {
return new Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: new List.generate(5, (int j) {
return new Text("$i,$j");
}),
);
},
),
),
),
);
}
Original source Vote up his answer too
I have a flutter application which shows a camera, then scans a qr-code using git://github.com/arashbi/flutter_qrcode_reader and on the call back, I want to navigate to another screen to show the information I get from some query. The problem is, it seems Navigator get a wrong context, so instead of full page navigation, I see the second page pushed inside my first page as a widget.
The build of first page is as follow :
#override
Widget build(BuildContext context) {
Widget main =
new Scaffold(
appBar: _buildAppBar(),
body: Column(
children: <Widget>[
_eventButton ?? new Text(""),
new Center(
child: new Text("Hi"))
],
),
floatingActionButton: new FloatingActionButton(
onPressed:
() {
new QRCodeReader()
.setAutoFocusIntervalInMs(200)
.setForceAutoFocus(true)
.setTorchEnabled(true)
.setHandlePermissions(true)
.setExecuteAfterPermissionGranted(true)
.scan().then((barcode) => _showTicketPage(barcode));
}
,
child: new Icon(Icons.check),
),
);
if (!_loading) {
return main;
} else {
return new Stack(
children: [main,
new Container(
decoration: new BoxDecoration(
color: Color.fromRGBO(220, 220, 220,
0.3) // Specifies the background color and the opacity
),
child: new Center(child: new CircularProgressIndicator(),))
]
);
}
}
The 'Hi' Widget is for debugging, and the navigate method is
void _showTicketPage(var barcode) {
Navigator.push(context, MaterialPageRoute(
builder: (BuildContext context) => TicketScreen(barcode)));
}
After getting the barcode, the second screen - TicketScreen - is pushed under 'Hi' Widget. I didn't even know this was possible to do.
I tried to get the context of the screen, save it to a field var, but that didn't help either.
How can I fix it? I ran out of ideas.