issue with flutter concatenation - flutter

Question

I have a problem concatenating two variables on flutter : I can't concatenate them, when I try to add a string behind, it doesn't work.
class MusicAlbumListing extends StatefulWidget {
final albumName;
MusicAlbumListing({Key key, this.albumName}) : super(key: key);
#override
_MusicAlbumListing createState() => _MusicAlbumListing();
}
class _MusicAlbumListing extends State<MusicAlbumListing> {
String _albumName = '';
void initState() {
_albumName = widget.albumName.toString();
var strr = "Look this new album : $_albumName ! Awesome :)";
}
It returns
Look this new album : Mothership
And then nothing
Can anyone help me ?

Answer 1

I don't think there is anything wrong with your String concatenation.
Here is a Minimal Working Example based on your incomplete code snippet:
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'StackOverflow Answer',
home: MusicAlbumListing(albumName: 'Mothership'),
);
}
}
class MusicAlbumListing extends StatefulWidget {
final String albumName;
MusicAlbumListing({Key? key, required this.albumName}) : super(key: key);
#override
_MusicAlbumListing createState() => _MusicAlbumListing();
}
class _MusicAlbumListing extends State<MusicAlbumListing> {
String _albumName = '';
void initState() {
super.initState();
_albumName = "Look this new album : ${widget.albumName} ! Awesome :)";
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: Center(child: Text(_albumName)),
);
}
}
Provide your Minimal Working Example for a more targeted answer.

Answer 2

Thanks for your fast reply
First i fetch on a local server (my raspberry pi) a file called output.txt with ssh script
import 'package:flutter/material.dart';
import 'package:ssh/ssh.dart';
import 'album_music.dart';
class MainMenu extends StatefulWidget {
#override
_MainMenu createState() => _MainMenu();
}
class _MainMenu extends State<MainMenu> {
String _result = '';
List _array;
final pi = new SSHClient(
host: "192.168.0.35",
port: 22,
username: "pi",
passwordOrKey: "mysecret",
);
Future<void> exec(String sshScript) async {
String result;
try {
result = await pi.connect();
if (result == "session_connected") {
result = await pi.execute(sshScript);
pi.disconnect();
}
} catch (e) {
print('Error: ${e.code}\nError Message: ${e.message}');
}
setState(() {
_result = result;
_array = null;
});
}
#override
void initState() {
super.initState();
exec(
"cd ../../; cd var/www/html/music; ls -d */ > output.txt; cat output.txt");
}
#override
Widget build(BuildContext context) {
final title = 'Albums disponibles';
var strings = _result.split('\n');
print(strings);
return MaterialApp(
title: title,
home: Scaffold(
appBar: AppBar(
title: Text(title),
),
body: ListView(
children: new List.generate(
strings.length - 1,
(index) => new ListTile(
title: Text(strings[index],
style: TextStyle(fontWeight: FontWeight.w500)),
leading: Icon(Icons.folder_open),
trailing: Icon(Icons.forward),
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => MusicAlbumListing(
albumName: strings[index].replaceAll("/", ""))));
},
),
)),
),
);
}
I open the txt file, and transform the cat output.txt to an array.
I think you're right, maybe the problem is not the concatenation.
For the first loop, Daft_Punk goes well.
That's my txt file :
Daft_Punk
MotherShip
LeonardCohenBestSongs
Pink_Floyd_Essentials
I have : Look this new album : Daft_Punk ! Awesome :)
But second loop and those after, concatenation won't work
Maybe a "bad" character has been introduced, which prevents concatenation