How to identify which button is clicked in flutter

问题

I have 4 buttons showing a different list each time a button is clicked . How to identify which button is clicked using flutter ?

回答1:

You can assign a callback that calls a different method for each button

new FlatButton(
  child: new Text(confirmText),
  onPressed: () => onOkPressed(),
),

or you can pass a parameter

new FlatButton(
  child: new Text(confirmText),
  onPressed: () => onButtonPressed('okButton'),
),

来源：https://stackoverflow.com/questions/47588528/how-to-identify-which-button-is-clicked-in-flutter