How can I fix 'non_constant_list_element' error in flutter?-CodePudding

I'm making an login page with flutter.

In the app, I get the information from user by using TextFormField, so I defined my custom class, 'CustomTextFormFiled', and it gets 3 parameter. The title of the formfield is first one, second one is hintText, and final one is controller.

After setting is finished, i found a error, it says 'The values in a const list literal must be constant. Try removing the keyword 'const' from the list literal.'

I tried changing definition type from final to const, but it not worked. How can i fix it?

Thank you for concerning me.

This is how controllers are defined,

and this one shows the way how i gave parameters

And this one is my custom text formfield class. enter code here

CodePudding user response：

In your CustomTextFieldController, instead of dynamic controller you can declare it TextEditingController controller.

And also _username, id declare as follows:

TextEditingController _userName = TextEditingController;

CodePudding user response：

I solved the problem.

I wrote const feature on the code that is not shown in the picture.

`child: ListView(children: const [ SizedBox(height: xlarge_gap), Logo("Register"),

          CustomTextFormField(`

const aftert children was the reason of the problem. Thank you.