In flutter there is a String Array List function named as StringList.join[] which is used to Convert Complete String Array List Object to Single String Variable in both flutter Android iOS application. Using the join[] method we can put specific alphabets or any other special character between each item of Array String List. The join[] method returns us the complete converted array object into single string.
Contents in this project Flutter Convert Complete String Array List Object to Single String Variable:
1. Open your projects main.dart file and import material.dart package.
1 | import 'package:flutter/material.dart'; |
2. Creating the void main runApp[] method and here we would call our main MyApp class.
1 | void main[] => runApp[MyApp[]]; |
3. Creating the main class named as MyApp extends StatelessWidget. This is our root parent class.
1 2 3 4 5 | class MyApp extends StatelessWidget { } |
4. Creating a final type List String Array named as alphabets. In this array we would store some random alphabets.
1 2 3 4 5 6 7 8 9 10 11 12 | final List alphabets = [ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J' ]; |
5. Creating the Widget Build method and here we would first create the Material App widget -> Scaffold widget -> Safe Area Widget -> Center Widget -> Padding widget -> Text Widget.
Note:- In the Text widget we would use the ${alphabets.join["," + " "]}method to convert the List String into single string variable and then print on mobile screen.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | Widget build[BuildContext context] { return MaterialApp[ home: Scaffold[ body: SafeArea[ child: Center[ child: Padding[ padding: EdgeInsets.fromLTRB[20, 20, 20, 20], child: Text[ '${alphabets.join["," + " "]}', style: TextStyle[fontSize: 20, color: Colors.black], textAlign: TextAlign.center, ]], ]]]]; } |
6. Complete source code for main.dart file:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | import 'package:flutter/material.dart'; void main[] => runApp[MyApp[]]; class MyApp extends StatelessWidget { final List alphabets = [ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J' ]; @override Widget build[BuildContext context] { return MaterialApp[ home: Scaffold[ body: SafeArea[ child: Center[ child: Padding[ padding: EdgeInsets.fromLTRB[20, 20, 20, 20], child: Text[ '${alphabets.join["," + " "]}', style: TextStyle[fontSize: 20, color: Colors.black], textAlign: TextAlign.center, ]], ]]]]; } } |
Screenshot:
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