change color based on the string value

Question

i am trying to change the primary color based on a string value , meaning if the string value is this then main color = this , else main color =that color i have a color.dart file with this code:

import 'package:flutter/material.dart';
import 'package:flutter/painting.dart';

Color mainColor = Color(0xfff04592);

and i have a string value stored in a class.

what i dont understand is how can i use conditional statement "if" in the colors.dart file ? like this :

if (value=='asd') 
{mainColor = Color(0xfff04592);}
else
{mainColor = Color(0xfff09245);}

Aleksandar · Accepted Answer · 2021-02-15 18:55:50Z

1

You can use ternary operator for assigning different colors like this:

Color mainColor = value == 'asd' ? Color(0xfff04592) : Color(0xfff09245);

answered Feb 15, 2021 at 18:55

Aleksandar

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1 Comment

Lars Over a year ago

What if there is more then one String?

fartem · Accepted Answer · 2021-02-15 18:15:57Z

1

You can declare a variable to store actual state for condition:

String value = 'default';

Color mainColor = value == 'default' ? Colors.green : Colors.red;

answered Feb 15, 2021 at 18:15

fartem

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Comments

M.M.Hasibuzzaman · Accepted Answer · 2021-02-16 05:33:19Z

1

i think its bette rto do in material app, you can do...

primaryColor: value == 'asd' ? colorOne : colorTwo

you can define your colorOne and colorTwo somewhere else

answered Feb 16, 2021 at 5:33

M.M.Hasibuzzaman

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