button icon onpressed in flutter code example

Example 1: flutter change the icon of icon button on pressed

bool selected = true;

//...

Widget build(BuildContext context) {
	return Scaffold(
    	body: Center(
          child: IconButton(
              icon: Icon( selected ? Icons.celebration : Icons.title),
              onPressed: () {
                setState(() {
                  selected = !selected;
                });
              },
          ), //IconButton
   		), //Center
    ); //Scaffold
}

Example 2: icon onpressed flutter

IconButton(    icon: Icon(Icons.bluetooth),    color: Colors.grey,    highlightColor: Colors.red,    hoverColor: Colors.green,    focusColor: Colors.purple,    splashColor: Colors.yellow,    disabledColor: Colors.amber,    iconSize: 48,    onPressed: () {      setState(() {        _isBluetoothOn = !_isBluetoothOn;      });    },  ),