How can I add a border to a widget in Flutter?
FlutterDartBorderFlutter WidgetFlutter Problem Overview
I'm using Flutter and I'd like to add a border to a widget (in this case, a Text
widget).
I tried TextStyle
and Text
, but I didn't see how to add a border.
Flutter Solutions
Solution 1 - Flutter
You can add the Text
as a child
to a Container
that has a BoxDecoration
with border
property:
Container(
margin: const EdgeInsets.all(15.0),
padding: const EdgeInsets.all(3.0),
decoration: BoxDecoration(
border: Border.all(color: Colors.blueAccent)
),
child: Text('My Awesome Border'),
)
Solution 2 - Flutter
Here is an expanded answer. A DecoratedBox
is what you need to add a border, but I am using a Container
for the convenience of adding margin and padding.
Here is the general setup.
Widget myWidget() {
return Container(
margin: const EdgeInsets.all(30.0),
padding: const EdgeInsets.all(10.0),
decoration: myBoxDecoration(), // <--- BoxDecoration here
child: Text(
"text",
style: TextStyle(fontSize: 30.0),
),
);
}
where the BoxDecoration
is
BoxDecoration myBoxDecoration() {
return BoxDecoration(
border: Border.all(),
);
}
Border width
These have a border width of 1
, 3
, and 10
respectively.
BoxDecoration myBoxDecoration() {
return BoxDecoration(
border: Border.all(
width: 1, // <--- border width here
),
);
}
Border color
These have a border color of
Colors.red
Colors.blue
Colors.green
Code
BoxDecoration myBoxDecoration() {
return BoxDecoration(
border: Border.all(
color: Colors.red, // <--- border color
width: 5.0,
),
);
}
Border side
These have a border side of
- left (3.0), top (3.0)
- bottom (13.0)
- left (blue[100], 15.0), top (blue[300], 10.0), right (blue[500], 5.0), bottom (blue[800], 3.0)
Code
BoxDecoration myBoxDecoration() {
return BoxDecoration(
border: Border(
left: BorderSide( // <--- left side
color: Colors.black,
width: 3.0,
),
top: BorderSide( // <--- top side
color: Colors.black,
width: 3.0,
),
),
);
}
Border radius
These have border radii of 5
, 10
, and 30
respectively.
BoxDecoration myBoxDecoration() {
return BoxDecoration(
border: Border.all(
width: 3.0
),
borderRadius: BorderRadius.all(
Radius.circular(5.0) // <--- border radius here
),
);
}
Going on
DecoratedBox
/BoxDecoration
are very flexible. Read Flutter — BoxDecoration Cheat Sheet for many more ideas.
Solution 3 - Flutter
The best way is using BoxDecoration()
Advantage
- You can set the border of a widget
- You can set the border Color or Width
- You can set a Rounded corner of a border
- You can add a Shadow of a widget
Disadvantage
BoxDecoration
only use withContainer
widget, so you want to wrap your widget inContainer()
Example
Container(
margin: EdgeInsets.all(10),
padding: EdgeInsets.all(10),
alignment: Alignment.center,
decoration: BoxDecoration(
color: Colors.orange,
border: Border.all(
color: Colors.pink[800], // Set border color
width: 3.0), // Set border width
borderRadius: BorderRadius.all(
Radius.circular(10.0)), // Set rounded corner radius
boxShadow: [BoxShadow(blurRadius: 10,color: Colors.black,offset: Offset(1,3))] // Make rounded corner of border
),
child: Text("My demo styling"),
)
Solution 4 - Flutter
As stated in the documentation, Flutter prefers composition over parameters.
Most of the time you're not looking for a property, but instead a wrapper (and sometimes a few helpers/"builder").
For borders, you want DecoratedBox
, which has a decoration
property that defines borders; but also background images or shadows.
Alternatively, like Aziza said, you can use Container
. Which is the combination of DecoratedBox
, SizedBox
and a few other useful widgets.
Solution 5 - Flutter
you can wrap that widget to DecoratedBox that provide decoration to that widget in that case
Widget textDecoration(String text){
return DecoratedBox(
decoration: BoxDecoration(
border: Border.all(
color: Colors.red,
width: 10,
),
),
child: Text(text)
);
}
Solution 6 - Flutter
Wrap that widget with the container
Container(
margin: const EdgeInsets.all(30.0),
padding: const EdgeInsets.all(10.0),
decoration: BoxDecoration(border: Border.all(
color: Colors.black,
width: 1,
),
),
child: Text(
"text",
style: TextStyle(fontSize: 30.0),
),
);
Solution 7 - Flutter
Here, as the Text widget does not have a property that allows us to define a border
, we should wrap it with a widget that allows us to define a border.
There are several solutions.
But the best solution is the use of BoxDecoration in the Container widget.
Why choose to use BoxDecoration?
Because BoxDecoration offers more customization like the possibility to define:
First, the border
and also define:
- border Color
- border width
- border radius
- shape
- and more ...
An example:
Container(
child:Text(' Hello Word '),
decoration: BoxDecoration(
color: Colors.yellow,
border: Border.all(
color: Colors.red ,
width: 2.0 ,
),
borderRadius: BorderRadius.circular(15),
),
),
Output:
Solution 8 - Flutter
You can use Container to contain your widget:
Container(
decoration: BoxDecoration(
border: Border.all(
color: Color(0xff000000),
width: 1,
)),
child: Text()
),
Solution 9 - Flutter
Use a container with Boxdercoration.
BoxDecoration(
border: Border.all(
width: 3.0
),
borderRadius: BorderRadius.circular(10.0)
);
Solution 10 - Flutter
In case someone would like a outlined/bordered text or apply multiple borders.
You could try this:
Solution 11 - Flutter
The above answers are also correct, but in case you want to add multiple borders at the same widget, then you can set this
Container(
child: const Center(
child: Text(
'This is your Container',
),
),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(10),
color: Colors.white,
boxShadow: const [
BoxShadow(color: Colors.green, spreadRadius: 8),
BoxShadow(color: Colors.yellow, spreadRadius: 5),
],
),
height: 50,
)
Solution 12 - Flutter
If you want to add border to some text of container then you can easily to do it by applying BoxDecoration to Container.
code :
Container(
decoration: BoxDecoration(
border: Border.all(
color: Colors.redAccent,
width: 1,
),
),
child: Text('Some Text'),
);