如何在 Flutter 中为小部件添加边框？

Question

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.

Answer 1

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'),
)

Answer 2

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.

Answer 3

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 with Container widget, so you want to wrap your widget in Container()

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"),
    )

Answer 4

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.

Answer 5

Here, as theText 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:

Answer 6

Using BoxDecoration() is the best way to show a border.

Container(
  decoration: BoxDecoration(
    border: Border.all(
    color: Color(0xff000000),
    width: 4,
  )),
  child: // Your child widget
),

You can also view full format here .

Answer 7

You can use Container to contain your widget:

Container(
  decoration: BoxDecoration(
    border: Border.all(
    color: Color(0xff000000),
    width: 1,
  )),
  child: Text()
),

Answer 8

Use a container with Boxdercoration.

 BoxDecoration(
    border: Border.all(
      width: 3.0
    ),
    borderRadius: BorderRadius.circular(10.0)
  );

Answer 9

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,
    )

Answer 10

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),
        ),
      );

Answer 11

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.

Answer 12

In case someone would like a outlined/bordered text or apply multiple borders.

You could try this:

https://pub.dev/packages/outlined_text

DEMO

Answer 13

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)); }

Answer 14

Rounded corner/border with bottom shadow

Container(
 // child it's depend on your requirement
  child: const Center(
    child: Text(
      'This is your Container',
    ),
  ),
  decoration: BoxDecoration(
    borderRadius: BorderRadius.circular(10),
    color: Colors.white,
  boxShadow: <BoxShadow>[
       // shadow color and radius
        BoxShadow(
            color: Colors.black54,
            blurRadius: 15.0,
            offset: Offset(0.0, 0.75)
        )
      ],
  ),
  // according your height ex. 50
  height: 50,
);

Answer 15

Try the following code:

Container(
  margin: margin,
  padding: padding,
  decoration: BoxDecoration(
    border: Border.all(
      color: color,
      width: width,
    ),
  ),
  child: Text(
    data,
    style: TextStyle(fontSize: 30.0),
  ),
),

Answer 16

Container(
  padding: const EdgeInsets.all(16.0),
  decoration: BoxDecoration(
    border: Border.all(),
  ),
  child: const Text(
    "FlutterService",
    style: TextStyle(fontSize: 34.0),
  ),
)

Border.all() creates a black border on all sides of a container. It is a very special type of constructor.

References: How To Add Border To Container in Flutter

Answer 17

I have tried to summarize all the important posibilities when using border in BoxDecoration .

Basic

  Container(
    decoration: BoxDecoration(border: Border.all()),
    child: const Text("Text"),
 ),    

---

BorderColor, width and strokeAlign

Container(
   decoration: BoxDecoration(
   border: Border.all(
       width: 4,
       color: Colors.green,
       strokeAlign: BorderSide.strokeAlignCenter)),
   child: const Text("Text"),
),

---

Border only on specific side

      Row(
        mainAxisAlignment: MainAxisAlignment.spaceAround,
        children: [
          Container(
            decoration: const BoxDecoration(
                border: Border(top: BorderSide(width: 2))),
            child: const Text("Text"),
          ),
          Container(
            decoration: const BoxDecoration(
                border: Border(bottom: BorderSide(width: 2))),
            child: const Text("Text"),
          ),
          Container(
            decoration: const BoxDecoration(
                border: Border(
                    top: BorderSide(width: 2),
                    bottom: BorderSide(width: 4))),
            child: const Text("Text"),
          ),
        ],
      ),

---

Different Shapes

      Row(
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: [
          Container(
            padding: const EdgeInsets.all(10),
            decoration: BoxDecoration(
                border: Border.all(),
                shape: BoxShape.circle),
            child: const Text("Text"),
          ),
          Container(
            padding: const EdgeInsets.all(10),
            decoration: BoxDecoration(
              border: Border.all(),
              borderRadius: BorderRadius.circular(10),
            ),
            child: const Text("Text"),
          ),
        ],
      ),

---

Curved Border Radius

    Row(
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: [
          Container(
            padding: const EdgeInsets.all(10),
            decoration: BoxDecoration(
                border: Border.all(),
                borderRadius: const BorderRadius.horizontal(
                    left: Radius.circular(5), right: Radius.circular(20))
                ),
            child: const Text("Text"),
          ),
          Container(
            padding: const EdgeInsets.all(10),
            decoration: BoxDecoration(
                border: Border.all(),
                borderRadius: const BorderRadius.only(
                    topLeft: Radius.circular(10),
                    bottomRight: Radius.circular(20))),
            child: const Text("Text"),
          ),
        ],
      ),

Answer 18

Text border style:

Stack(
  children: <Widget>[
    // Stroked text as border.
    Text(
      'Greetings, planet!',
      style: TextStyle(
        fontSize: 40,
        foreground: Paint()
          ..style = PaintingStyle.stroke
          ..strokeWidth = 6
          ..color = Colors.blue[700]!,
      ),
    ),
    // Solid text as fill.
    Text(
      'Greetings, planet!',
      style: TextStyle(
        fontSize: 40,
        color: Colors.grey[300],
      ),
    ),
  ],
)

Answer 19

you can add a border to a widget by wrapping it in a Container widget and specifying the border properties.

Here's an example of how you can add a border to a Text widget:

Container(
decoration: BoxDecoration(
    border: Border.all(
        color: Colors.black,
        width: 2,
    ),
),
child: Text("This text has a border"),

)

Answer 20

use the Text widget inside a container and use decoration to border the text decoration: BoxDecoration( border: Border.all( color: Color(0xff000000), width: 1, )),

Answer 21

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'),
);