Flutter how to generate random strings

Question

Hello does anyone know how I can only generate Strings with letters. Like :

"skdnjfsd" or "bdfvkjnd" ?

my current code :

String _randomString(int length) {
    var rand = new Random();
    var codeUnits = new List.generate(
        length,
            (index){
          return rand.nextInt(33)+89;
        }
    );

    return new String.fromCharCodes(codeUnits);
  }

Does this answer your question? [How to generate random string in dart?](https://stackoverflow.com/questions/61919395/how-to-generate-random-string-in-dart) — Christopher Moore, Mar 25 '21 at 14:24

score 3 · Answer 1 · answered Mar 25 '21 at 13:34

implement to your code this function

String getRandom(int length){
    const ch = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz';
    Random r = Random();
    return String.fromCharCodes(Iterable.generate(
    length, (_) => ch.codeUnitAt(r.nextInt(ch.length))));
}

and after call it with length

the original answer : How to generate random string in dart?

score 1 · Answer 2 · answered Mar 25 '21 at 13:23

As per the answer of @julemand101, you can do this:

import 'dart:math';

void main() {
  print(getRandomString(5));  // 5GKjb
  print(getRandomString(10)); // LZrJOTBNGA
  print(getRandomString(15)); // PqokAO1BQBHyJVK
}

const _chars = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz1234567890';
Random _rnd = Random();

String getRandomString(int length) => String.fromCharCodes(Iterable.generate(
    length, (_) => _chars.codeUnitAt(_rnd.nextInt(_chars.length))));```

Instead of coping the answer, you could have flagged the post as duplicate. — iDecode, Mar 31 '21 at 16:09

Flutter how to generate random strings

2 Answers2