I am trying to put column() widget inside Flexible and/or Expanded widget, but i am getting following error, i don't know why this is occurring, can anybody please let me know how can i put column() widget inside Flexible Widget.

I am getting following erros:

Evaluation of this constant expression throws an exception.dart(const_eval_throws_exception)
A value of type 'Null' can't be assigned to a parameter of type 'Widget' in a const constructor.
Try using a subtype, or removing the keyword 'const'.dartconst_constructor_param_type_mismatch
The constructor being called isn't a const constructor.
Try removing 'const' from the constructor invocation.dartconst_with_non_const
The values in a const list literal must be constants.
Try removing the keyword 'const' from the list literal.dartnon_constant_list_element
The constructor being called isn't a const constructor.
Try removing 'const' from the constructor invocation.dartconst_with_non_const
The values in a const list literal must be constants.
Try removing the keyword 'const' from the list literal.dartnon_constant_list_element

Flutter Version

Flutter 2.5.0 • channel stable •

CodePudding user response：

remove const from UI where you declared in front of the widget. That's also mentioned in your editor dialog.

CodePudding user response：

Well, the error is due to using the keyword const for the constructor widget. Just remove it and you will be all good.