[FIXED] How to pass callback in Flutter

Issue

Code will explain all:

    class ResultOverlay extends StatefulWidget {
    
      final bool _isCorrect;
      VoidCallback _onTap;
    
      ResultOverlay(this._isCorrect, this._onTap);
      ......
      ......
}

Its state class:

class ResultOverlayState extends State<ResultOverlay>{
@override
  Widget build(BuildContext context) {
    ........
      child: new InkWell(
        onTap: () => widget._onTap,
.....
.....
}

Passing of callback function:

new ResultOverlay(isCorrect, () {
                        () => CallAnswerPage();
                      })

What I am missing here?

Solution

I was not passing the callback correctly. Here is the correct syntax:

new ResultOverlay(
    isCorrect, 
    () => callAnswerPage()
)

So silly mistake :)

Answered By - pallav bohara

Answer Checked By - David Goodson (PHPFixing Volunteer)