How to add onPressed to multiple FloatingActionButton in flutter - flutter

Question

I have an example of a FloatingActionButton working multiple but I don't know how to add it onPressed to it.
I found on the form of the following topic:
https://stackoverflow.com/a/46480722/14451514
In the example there are three icons I need to know how I can onPressed it how I do that?
import 'package:flutter/material.dart';
import 'dart:math' as math;
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new MaterialApp(
home: new MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
#override
State createState() => new MyHomePageState();
}
class MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {
AnimationController _controller;
static const List<IconData> icons = const [ Icons.sms, Icons.mail, Icons.phone ];
#override
void initState() {
_controller = new AnimationController(
vsync: this,
duration: const Duration(milliseconds: 500),
);
}
Widget build(BuildContext context) {
Color backgroundColor = Theme.of(context).cardColor;
Color foregroundColor = Theme.of(context).accentColor;
return new Scaffold(
appBar: new AppBar(title: new Text('Speed Dial Example')),
floatingActionButton: new Column(
mainAxisSize: MainAxisSize.min,
children: new List.generate(icons.length, (int index) {
Widget child = new Container(
height: 70.0,
width: 56.0,
alignment: FractionalOffset.topCenter,
child: new ScaleTransition(
scale: new CurvedAnimation(
parent: _controller,
curve: new Interval(
0.0,
1.0 - index / icons.length / 2.0,
curve: Curves.easeOut
),
),
child: new FloatingActionButton(
heroTag: null,
backgroundColor: backgroundColor,
mini: true,
child: new Icon(icons[index], color: foregroundColor),
onPressed: () {},
),
),
);
return child;
}).toList()..add(
new FloatingActionButton(
heroTag: null,
child: new AnimatedBuilder(
animation: _controller,
builder: (BuildContext context, Widget child) {
return new Transform(
transform: new Matrix4.rotationZ(_controller.value * 0.5 * math.pi),
alignment: FractionalOffset.center,
child: new Icon(_controller.isDismissed ? Icons.share : Icons.close),
);
},
),
onPressed: () {
if (_controller.isDismissed) {
_controller.forward();
} else {
_controller.reverse();
}
},
),
),
),
);
}
}
If anyone knows the solution to that problem please help me

Answer 1

I would suggest you to add a FAB Onpress button, use this github program.
Speed Dail Floating Action Bar
https://github.com/tiagojencmartins/unicornspeeddial

Answer 2

A List (Array) of functions can help you here, you have an index of the current item just get the function from List by index and call it onPress.
import 'package:flutter/material.dart';
import 'dart:math' as math;
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new MaterialApp(
home: new MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
#override
State createState() => new MyHomePageState();
}
class MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {
AnimationController _controller;
static const List<IconData> icons = const [
Icons.sms,
Icons.mail,
Icons.phone
];
static method1() {
print('method 1');
}
static method2() {
print('method 2');
}
static method3() {
print('method 3');
}
List<Function> methods = [method1, method2, method3];
#override
void initState() {
_controller = new AnimationController(
vsync: this,
duration: const Duration(milliseconds: 500),
);
}
Widget build(BuildContext context) {
Color backgroundColor = Theme.of(context).cardColor;
Color foregroundColor = Theme.of(context).accentColor;
return new Scaffold(
appBar: new AppBar(title: new Text('Speed Dial Example')),
floatingActionButton: new Column(
mainAxisSize: MainAxisSize.min,
children: new List.generate(icons.length, (int index) {
Widget child = new Container(
height: 70.0,
width: 56.0,
alignment: FractionalOffset.topCenter,
child: new ScaleTransition(
scale: new CurvedAnimation(
parent: _controller,
curve: new Interval(0.0, 1.0 - index / icons.length / 2.0,
curve: Curves.easeOut),
),
child: new FloatingActionButton(
heroTag: null,
backgroundColor: backgroundColor,
mini: true,
child: new Icon(icons[index], color: foregroundColor),
onPressed: () {
methods[index]();
},
),
),
);
return child;
}).toList()
..add(
new FloatingActionButton(
heroTag: null,
child: new AnimatedBuilder(
animation: _controller,
builder: (BuildContext context, Widget child) {
return new Transform(
transform: new Matrix4.rotationZ(
_controller.value * 0.5 * math.pi),
alignment: FractionalOffset.center,
child: new Icon(
_controller.isDismissed ? Icons.share : Icons.close),
);
},
),
onPressed: () {
if (_controller.isDismissed) {
_controller.forward();
} else {
_controller.reverse();
}
},
),
),
),
);
}
}
try this out

Answer 3

You need to extend your IconData list to a model that contains Function. It will look something like this:
class NewModel {
IconData iconData;
Function func;
}
And then:
static const List<NewModel> iconsWithFunc =
[
/* Your Items with OnPressed Functions */
];
After that you can use it easily:
child: new FloatingActionButton(
heroTag: null,
backgroundColor: backgroundColor,
mini: true,
child: new Icon(iconsWithFunc[index].iconData, color: foregroundColor),
// Use it in here.
onPressed: iconsWithFunc[index].func,
),