alert dialog is not working in my flutter torch project - flutter

Question

AlertDialog is not working in my project code link is added
https://github.com/alikthehacker/Flutter_Torch/issues/1#issue-448532152

Answer 1

Here is the full working code.
void main() => runApp(MaterialApp(home: new MyApp())); // this is what you need
class MyApp extends StatefulWidget {
#override
_MyAppState createState() => new _MyAppState();
}
class _MyAppState extends State<MyApp> {
bool _hasFlash = false;
bool _isOn = false;
double _intensity = 1.0;
#override
initState() {
super.initState();
initPlatformState();
}
initPlatformState() async {
bool hasFlash = await Lamp.hasLamp;
print("Device has flash ? $hasFlash");
setState(() { _hasFlash = hasFlash; });
}
#override
Widget build(BuildContext context) {
return Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage("assets/images/chocolate_pic.png"), fit: BoxFit.cover)),
child: Scaffold(
backgroundColor: Colors.transparent,
appBar: AppBar(
elevation: 10 ,
backgroundColor: Colors.transparent,
title: Text('Flutter Torch'),
centerTitle: true,
leading: IconButton(
icon: Icon(
Icons.info,
color: Colors.white,
),
onPressed: () {
showinfo(context);
}
),
),
body: new Center(
child: new Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
ButtonTheme(
minWidth: 150.0,
height: 40.0,
child : new RaisedButton(
child: Text('Flash is on: $_isOn'),
color: Theme.of(context).accentColor,
elevation: 10.0,
splashColor: Colors.blueGrey,
onPressed: _turnFlash,
textColor: Colors.yellowAccent,
padding: EdgeInsets.fromLTRB(10, 10, 10, 10),
shape: new RoundedRectangleBorder(borderRadius: new BorderRadius.circular(30.0))
),
),
new Text('Device has flash: $_hasFlash',),
]),
),
),
);
}
void showinfo(BuildContext context){
var alertDialog = AlertDialog(
title: Text('About Flutter Torch'),
content: Text('app made by alik kumar ghosh'),
);
showDialog(
context: context,
builder: (BuildContext context){
return alertDialog;
}
);
}
Future _turnFlash() async {
_isOn ? Lamp.turnOff() : Lamp.turnOn(intensity: _intensity);
var f = await Lamp.hasLamp;
setState((){
_hasFlash = f;
_isOn = !_isOn;
});
}
}