How do I disable Highbutton?

The RaisedButton / FlatButton / TextButton widget(s) can be disabled by assigning onPressed property to null . They can be disabled when onPressed property is not used at all.

How to Remove Default Padding From Widgets In Flutter?

Creating another function named as disableElevatedButton(). In this function we would again use the setState() method to change the State value to False . It will make the Elevated button disabled.

You can make button disable by setting onPressed property null . If you set onPressed to null Flutter will added disabled related characteristic to button automatically. I have created a switch with a button and when you turn on switch the value of onPressed set to null.