How to change border color of checkbox in flutter / dart

Question

I have a checkbox added to my UI in Flutter app, I can see checkbox color or active color property but can't find any option to change border color of checkbox , which is usually black.

Whats the provision or tweak to change the border color ?

Tried it but I was required to adjust the container as per the size of checkbox I didn't find it elegant — vishal dharankar
– vishal dharankar, Commented Dec 21, 2019 at 18:12

vishal dharankar · Accepted Answer · 2019-12-19 07:19:03Z

59

Checkbox(value: false, tristate: false, onChanged: () {});
　　↓
Theme(
data: ThemeData(unselectedWidgetColor: Colors.red),
child: Checkbox(value: false, tristate: false, onChanged: (bool value) {}));

No onChanged, then the border will be grey(disabled).

edited Dec 19, 2019 at 7:19

vishal dharankar

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answered Dec 18, 2019 at 7:24

kooskoos

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2 Comments

kooskoos Over a year ago

Glad, I was able to help!

mixable Over a year ago

It should be mentioned, that the Checkbox requires the onChanged parameter, otherwise the inactive colors are used and ThemeData does not bring any changes

Hossein Azem · Accepted Answer · 2022-10-10 09:28:25Z

32

You can do it by using side property...

side: BorderSide(color: Color(0xff585858)),

edited Oct 10, 2022 at 9:28

Hossein Azem

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answered Jun 19, 2021 at 16:37

Huraira Awan

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1 Comment

M. B. Over a year ago

Simplest answer, thanks! The side property has preference over ThemeData and CheckboxThemeData.

Moghaddam · Accepted Answer · 2021-04-11 11:50:25Z

8

is case you wanna define app-wide theme for your checkboxes you can do this:

MaterialApp(
   ...
  theme:ThemeData(
    checkboxTheme: CheckboxThemeData(
      fillColor: MaterialStateColor.resolveWith(
        (states) {
          if (states.contains(MaterialState.selected)) {
           return Colors.purple // the color when checkbox is selected;
            }
         return Colors.white //the color when checkbox is unselected;
         },
    ),
   ),
  ),
 )

it is a good practice to define app-wide theme for your app to avoid code duplication and ensure consistency it also provides better maintenance. enjoy coding:)

answered Apr 11, 2021 at 11:50

Moghaddam

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Comments

Jashwanth Neela · Accepted Answer · 2024-01-11 07:02:52Z

2

You could change the border color using below code.

   Checkbox(
      value: _isChecked,
      onChanged: (bool value) => setState(() => _isChecked = value),
      side: BorderSide(color: Colors.green, width: 2.0),
    )

answered Jan 11, 2024 at 7:02

Jashwanth Neela

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Comments

Peter Haddad · Accepted Answer · 2019-12-18 07:43:55Z

1

You can do this:

        Container(
            decoration: const BoxDecoration(
              border: Border(
                top: BorderSide(width: 3.0, color: Colors.red),
                left: BorderSide(width: 3.0, color: Colors.red),
                right: BorderSide(width: 3.0, color: Colors.red),
                bottom: BorderSide(width: 3.0, color: Colors.red),
              ),
            ),
            child: Checkbox(value: false, onChanged: null),
            width: 20,
            height: 20),

The BoxDecoration class contains border property that will let you customize the border sides and then you can add a Checkbox and match the width and height of the container to the checkbox

answered Dec 18, 2019 at 7:43

Peter Haddad

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1 Comment

Sameen Over a year ago

ThemeData is a much more effective way of setting the border.

Mr. Tayyab MuGhal · Accepted Answer · 2021-10-29 05:11:33Z

1

 Transform.scale( //For Increasing or decreasing Sizes 
                  scale: 1.3,
                  child: Theme( // For Color Change, 
                    data: ThemeData(unselectedWidgetColor: AppColors.checkBoxBorderColor),
                    child: Checkbox(
                      value: true,
                      shape: RoundedRectangleBorder( // Making around shape
                          borderRadius: BorderRadius.circular(2)),
                      onChanged: (isCheck) {},
                      activeColor: AppColors.checkBoxActiveColor,
                    ),
                  ),
                ),

answered Oct 29, 2021 at 5:11

Mr. Tayyab MuGhal

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Comments

Arslan Habib · Accepted Answer · 2022-01-10 10:47:45Z

1

Here is how you can change the color of text box outline

Checkbox(value: isChecked, onChanged: (val){
                      if(val != null) {
                        isChecked = val;
                        setState(() {
                        });
                      }
                    },checkColor: theme.primaryColor,
                    activeColor: theme.whiteColor,
                    hoverColor: theme.whiteColor,
                    side: BorderSide(
                      color: whiteColor, //your desire colour here
                      width: 1.5,
                    ),
                  ),

answered Jan 10, 2022 at 10:47

Arslan Habib

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Comments

Dinith · Accepted Answer · 2021-10-28 20:33:14Z

0

Use side its simple.

Ex - side: BorderSide(color: Colors.red),

answered Oct 28, 2021 at 20:33

Dinith

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