Flutter - SimpleDialog in FloatingActionButton

Question

I'm trying to create a SimpleDialog after a tap on the FloatingActionButton, however when pressing that button nothing happens.

What was I doing wrong?

import "package:flutter/material.dart";  void main() {   runApp(new ControlleApp()); }  class ControlleApp extends StatelessWidget {   @override   Widget build(BuildContext context) {     return new MaterialApp(       home: new HomePage(),     );   } }  class HomePage extends StatelessWidget {   @override   Widget build(BuildContext context) => new Scaffold(     appBar: new AppBar(       backgroundColor: new Color(0xFF26C6DA),     ),     floatingActionButton: new FloatingActionButton(       tooltip: 'Add',       child: new Icon(Icons.add),       backgroundColor: new Color(0xFFF44336),       onPressed: (){         new SimpleDialog(           title: new Text('Test'),           children: <Widget>[             new RadioListTile(               title: new Text('Testing'), value: null, groupValue: null, onChanged: (value) {},             )           ],         );       }          ),       ); } 

Answer 1

I noticed the accepted answer is using child for showDialog which is actually deprecated, so I would recommend avoiding it. You should be using builder instead, I've provided an example:

onPressed: () {     showDialog(         context: context,         builder: (_) => AlertDialog(             title: Text('Dialog Title'),             content: Text('This is my content'),         )     ); } 

Answer 2

You need to wrap this on a show action dialog.

showDialog(context: context, builder: (BuildContext context) {    return new AlertDialog(       title: new Text("My Super title"),       content: new Text("Hello World"),    ); }