I am trying to align image and text in the center, it works when text is small but when i have large text then everything changes. I am using GridView which has 3 items on each row..
Widget buildItems(BuildContext context, String impagepath, String modulename) {
return Column(
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Expanded(
child: CustomButtonWidget(
image: impagepath,
size: 100,
borderWidth: 5,
onTap: () {}
),
),
Row(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Container(
width: double.infinity,
height: double.infinity,
child: Text("${selectlang.getAlbum(modulename, lang_selection)}"),
),
],
)
],
);
}
You need to use CrossAxisAlignment property of Column` widget
Use crossAxisAlignment: CrossAxisAlignment.center, in your Column widgets
Widget buildItems(BuildContext context, String impagepath, String modulename) {
return Column(
mainAxisSize: MainAxisSize.max,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Expanded(
child: CustomButtonWidget(
image: impagepath,
size: 100,
borderWidth: 5,
onTap: () {}
),
),
Row(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Container(
width: double.infinity,
height: double.infinity,
child: Text("${selectlang.getAlbum(modulename, lang_selection)}"),
),
],
)
],
);
}
use crossAxisAlignment: CrossAxisAlignment.center inside column widget.
Related
Widget build(BuildContext context) {
return Container(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Flexible(
flex: 1,
child: Container(
color: Colors.blueAccent
),
),
Flexible(
flex: 4,
child: Container(
color: Colors.deepOrangeAccent,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
//mainAxisSize: MainAxisSize.max,
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Icon(Icons.image),
],
),
),
),
Flexible(
flex: 2,
child: Container(color: Colors.blueGrey),
),
],
),
);
Screenshot
The Icon is taking its original size only. I want it to fill the container.
I have tried LayoutBuilder but the BoxConstraints have infinite height warning comes.
Please suggest any other options without using hardcoded sizes for any of the widgets.
Edit; So after reading your comment here is you should use a FittedBox instead (as suggested in the comments) and BoxFit.Fill property; so:
<Widget>[ Expanded(child:FittedBox(child: Icon(Icons.image),fit: BoxFit.fill)), ]
--
If you can change your icon to Image then you can use the BoxFit.fill property to stretch the image to fill the entire container (wrap the image in Expanded widget too).
Here is an example with a placeholder:
Flexible(
flex: 4,
child: Container(
color: Colors.deepOrangeAccent,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
//mainAxisSize: MainAxisSize.max,
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Expanded(child: Image.network('https://picsum.photos/250?image=9', fit:BoxFit.fill)
)
],
),
),
I would take the LayoutBuilder approach. You mentioned you had infinity warning, which might be because you don't dynamically pick between the height of your parent container or its width.
Depending on the orientation of your device, you might need to pick one or the other. The easiest way to cater for that is to pick the smaller of the two.
Widget build(BuildContext context) {
return Container(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Flexible(
flex: 1,
child: Container(color: Colors.blueAccent),
),
Flexible(
flex: 4,
child: Container(
color: Colors.deepOrangeAccent,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
//mainAxisSize: MainAxisSize.max,
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
LayoutBuilder(builder: (context, constraints) {
var height = constraints.maxHeight;
var width = constraints.maxWidth;
return Icon(FontAwesomeIcons.addressBook, size: min(height, width));
}),
],
),
),
),
Flexible(
flex: 2,
child: Container(color: Colors.blueGrey),
),
],
),
);
}
}
Note: you'll need to import the 'dart:math' package to use the min() function.
Hello, I'm trying to center my images in the app, but I'm not getting it.
What am I doing wrong? How am I going to centralize these images?
InkWell(
child: new Padding(
padding: EdgeInsets.only(top: 50),
child: snapshot.data.Facebook != ""
? Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Align(
alignment: Alignment.bottomCenter,
child: Image.asset(
"assets/images/facebook.png",
height: 30,
),
),
],
)
: Row(
children: <Widget>[],
),
),
onTap: () async {
if (await canLaunch(snapshot.data.Facebook)) {
await launch(snapshot.data.Facebook);
} else {
throw 'erro ao tentar acessar o facebook do(a) $snapshot.data.Nome';
}
}),
I'm stopped at this
Use mainAxisAlignment to align their child to center, spaceAround, spaceBetween, etc .
and mainAxisSize to provide size of mainAxis .
InkWell(
child: new Padding(
padding: EdgeInsets.only(top: 50),
child: snapshot.data.Facebook != ""
?
Row(
mainAxisAlignment : MainAxisAlignment.center,
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Align(
alignment: Alignment.bottomCenter,
child: Image.asset(
"assets/images/facebook.png",
height: 30,
),
),
],
)
: Row(
children: <Widget>[],
),
),
onTap: () async {
if (await canLaunch(snapshot.data.Facebook)) {
await launch(snapshot.data.Facebook);
} else {
throw 'erro ao tentar acessar o facebook do(a) $snapshot.data.Nome';
}
}),
set image property like this
Row(
mainAxisAlignment: MainAxisAlignment.center,
image:DecorationImage(
fit:BoxFit.fill
image: AssetImage("images/Ani.png"),
)
);
To center align the widgets in the Row widget, you can use the mainAxisAlignment property and set it to MainAxisAlignment.center.
Here is an example from your code snippet
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Image.asset("assets/images/facebook.png", height: 30),
Image.asset("assets/images/instagram.png", height: 30),
Image.asset("assets/images/linkedin.png", height: 30)
],
));
I want to expand a column horizontally while keeping the children (an icon and a text) in the center.
When I use CrossAxisAlignment.center it doesn't mathes its parents width. So I tried CrossAxisAlignment.stretch.
Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Icon(Icons.help),
Text('Please help!'),
],
),
Here the text was aligned left even though the icon is centerd.
I do not understand this and a solution would be highly appreciated.
have you tried wrapping column in a container and setting width to double.infinity?
Container(
width: double.infinity,
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Icon(Icons.help),
Text('Please help!'),
],
),
)
I found a hack might not the exact solution but works for me.
there might be other solutions
Added a SizedBox box widget with width because we need to center horizontally.
Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Icon(Icons.help),
Text('Please help!'),
SizedBox(
width: double.infinity, // it will take entire available device width
height: 0,
)
],
),
Another way.
Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Row(
children: <Widget>[
Expanded(
child: Container(),
),
Icon(
Icons.help,
color: Colors.white,
),
Expanded(
child: Container(),
),
],
),
Row(
children: <Widget>[
Expanded(
child: Container(),
),
Text('Please help!'),
Expanded(
child: Container(),
),
],
)
],
)
The right way to do is:
Center( // it helps column stretch
child: Column(
mainAxisAlignment: MainAxisAlignment.center, // it helps child stay in center
children: ...,
)
)
I want to do this :
But here is what I actually got :
Here is my code :
Row itemTransaction(BuildContext context, Transaction transaction) {
/// This is the function that will build each item of our transaction list.
return new Row(
children: <Widget>[
new Container(
width: MediaQuery.of(context).size.width / 6,
height: MediaQuery.of(context).size.width / 6,
child: new Image.asset(
(transaction.sent) ? "images/tx_output.png" : "images/tx_input.png",
),
),
new Column(
children: <Widget>[
new Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
discoderyText("test"),
discoderyText("test 2"),
],
),
discoderyText("SOME HASH KEY"),
],
),
],
);
}
The discoderyText is basically a custom text (i.e. with colors).
As you can see, there is mainAxisAlignment: MainAxisAlignment.spaceBetween set for my Row, so test and test2 should be on opposite sides.
When I remove the image and I only returns a Row that contains two Text, and I set the mainAxisAlignment, it works. It seems like nested rows can NOT use this variable.
Here is basically the plan of my view :
Screenshot
Row(
children: <Widget>[
Container(
width: MediaQuery.of(context).size.width / 6,
height: MediaQuery.of(context).size.width / 6,
child: CircleAvatar(backgroundImage: AssetImage(chocolateImage),),
),
Expanded( // add this
child: Padding(
padding: const EdgeInsets.all(8.0), // give some padding
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.min, // set it to min
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Text("test"),
Text("test 2"),
],
),
Text("SOME HASH KEY HERE"),
],
),
),
),
],
)
This is my code to build the item view container:
Widget buildItemView(InboxItem t) {
return GestureDetector(
behavior: HitTestBehavior.translucent,
onTap: () => print("ontap")),
child: Column(
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Padding(padding: EdgeInsets.fromLTRB(15.0, 10.0, 15.0, 10.0),
child: Row(
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Container(
icon ...
),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
/// title
_buildTitle(t),
...
],
)
],
)),
Divider(height: 3.0)
],
),
);
}
and _buildTitle code, here is where the problem occurs:
Widget _buildTitle(InboxItem item) {
return Container(
padding: EdgeInsets.only(bottom: 2.0),
child: Row(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
mainAxisSize: MainAxisSize.max,
children: <Widget>[
/// sender
Text(item.sender == null ? "" : item.sender, style: ltBlackLargeText),
/// time
Text(item.receiveTime == null ? "" : item.receiveTime,
style: dkGreySmallText),
],
),
);
}
Run result, time is immediately after the username instead of the right.
This is part of the screenshot:
Where is the problem?
Because the superior does not fill the remaining space, change the item view code:
Widget buildItemView(InboxItem t) {
return GestureDetector(
behavior: HitTestBehavior.translucent,
onTap: () => print("ontap")),
child: Column(
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Padding(padding: EdgeInsets.fromLTRB(15.0, 10.0, 15.0, 10.0),
child: Row(
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Container(
icon ...
),
Expanded(
child:Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
/// title
_buildTitle(t),
...
],
) ,
)
],
)),
Divider(height: 3.0)
],
),
);
}
Wrap Column Widget with Expanded inside Row as below,
Row(
children: [
Image.asset("assets/..."),
Expanded(
child: Column(children: [
Row(
children: [
Text("admin"),
Text("2020-12-14"),
],
),
]),
),
],
)
See this image
Wrap your row in the SizedBox widget and set your desired width. Inside the column widget, the row is not getting enough width to apply mainAxisAlignment: MAinAxisAlignment.spaceBetween.
Row(
children: [
// avatar image
const CircleAvatar(
backgroundColor: Colors.yellow,
radius: 45,
),
const SizedBox(width: 10),
// for side details
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
// for first row using spaceBetween
SizedBox(
width: MediaQuery.of(context).size.width * 0.6,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: const [
Text('admin'),
Text('20-10-2020'),
],
),
),
// other details
const SizedBox(height: 10),
const Text('123'),
const SizedBox(height: 10),
const Text('12312'),
],
),
],
),
You don't need to these three lines;
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
mainAxisSize: MainAxisSize.max,
Just use Spacer() to push the next item to the end of empty space. Here is your final code;
Widget _buildTitle(InboxItem item) {
return Container(
padding: EdgeInsets.only(bottom: 2.0),
child: Row(
children: <Widget>[
/// sender
Text(item.sender == null ? "" : item.sender, style: ltBlackLargeText),
Spacer(),
/// time
Text(item.receiveTime == null ? "" : item.receiveTime,
style: dkGreySmallText),
],
),
);
}