How to change a text style on Flutter when button pressed

Question

Is anyone know how to change a text style on Flutter when the button pressed?

As example, i have a code like this :

class _scanningState extends Stat         


        

Answer 1

I recommend you to read about Stateful Widgets https://flutter.io/tutorials/interactive/#stateful-stateless

    class _scanningState extends State {
      bool pressed = false;
      String strText = 'ABCDEFG';

      @override
      Widget build(BuildContext context) {
        return Scaffold(
            backgroundColor: Colors.blue,
            body: new Column(
              children: [
                new Text(strText),
                new RaisedButton(
                  child: new Text(
                    'Button',
                    style: pressed
                        ? TextStyle(fontSize: 30.0)
                        : TextStyle(fontSize: 10.0),
                  ),
                  onPressed: () {
                    //Change text style of strText()???
                    setState(() {
                      pressed = !pressed;
                    });
                  },
                )
              ],
            ));
      }