How to add a new button when onPressed is called? - flutter

Question

I have an Elevated Icon Button that when pressed displays a Dialog that prompts a user to enter text and select an amount from a NumberPicker. The showDialog function is called that saves the user's entry in a TextEditingController:
How would I create a function that once the user saves their entry in Dialog, creates a new button that displays TextEditingController.text as shown in the below:
_addItem code:
Future<void> _addItem(BuildContext context) async {
valueText = '';
return showDialog(
context: context,
builder: (context) {
return AlertDialog(
title: Text('Example'),
content: Row(
children: [
Container(
width: 150,
child: TextField(
onChanged: (value) {
setState(() {
valueText = value;
});
},
controller: _textController,
decoration: InputDecoration(hintText: '"Example"'),
),
),
NumberPicker(
value: _currentValue,
minValue: 0,
maxValue: 100,
onChanged: (value) => setState(() => _currentValue = value),
),
],
),
actions: <Widget>[
ElevatedButton(
child: Text('CANCEL'),
onPressed: () {
setState(() {
Navigator.pop(context);
});
},
),
ElevatedButton(
child: Text('OK'),
onPressed: () {
setState(() {
codeDialog = valueText;
Navigator.pop(context);
});
},
),
],
);
});
}
Currently the button updates to the textEditingController.text. I want to replace the Icon with the number selected by the user but I'll figure that out later. Probably best to just replace it with a conditional statement that renders a list of different buttons. They need to be buttons so they can be edited if needed before all data is sent to a server.

Answer 1

You have to use statement in the build method of your Stateful widget
... State of your widget ...
final TextController _textController;
final int _currentValue;
Widget build(context) {
return YourWidgetTree(
child: Row(
children: [
ElevatedButton(child: Text('Add item')),
if(_controller.text.isNotEmpty)
ElevatedButton(child: Text('$_currentValue ${_controller.text}', onPressed: (){ ... })),
])
)
}
Future<void> _addItem(BuildContext context) {...}