CODEWITHSUNDEEP
jsonstringflutter
Wali Seddiqi
Wali Seddiqi

Reputation: 466

Flutter converting a string into array

I am trying to change a long string text into an array, There are some methods in dart as String.split but its not working in Flutter, is there any solution that I can convert a string by spaces into an array and then use the array in a Listview

Upvotes: 18

Views: 53404

Answers (3)

Aguda John Omotayo
Aguda John Omotayo

Reputation: 21

List<String> list = "Hello Word".split("");
print(list);
//[H,e,l,l,o, ,W,o,r,l,d]


List<String> list = "Hello World".split(" ");
print(list);
//["Hello", "World"]

Upvotes: 1

Inder Pal Singh
Inder Pal Singh

Reputation: 427

For those who want to convert each character of string into list item, we can

 String username = "John Doe";

 List<String> searchKeywords = List<String>.generate(
          username.length,
          (index) => username[index]); // ['J','o','h','n',' ','D','o','e']

Morever you can remove white spaces using trim() method

Upvotes: 4

NiklasPor
NiklasPor

Reputation: 9785

After using String.split to create the List (the Dart equivalent of an Array), we have a List<String>. If you wanna use the List<String> inside a ListView, you'll need a Widget which displays the text. You can simply use a Text Widget.

The following functions can help you to do this:

  1. String.split: To split the String to create the List
  2. List<String>.map: Map the String to a Widget
  3. Iterable<Widget>.toList: Convert the Map back to a List

Below a quick standalone example:

Code Example

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  static const String example = 'The quick brown fox jumps over the lazy dog';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: ListView(
          children: example
              .split(' ')                       // split the text into an array
              .map((String text) => Text(text)) // put the text inside a widget
              .toList(),                        // convert the iterable to a list
        )
      ),
    );
  }
}

Upvotes: 30

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