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This blog will explore the Convert String & Number To Byte Array In Flutter & Dart. We perceive how to execute a demo program. We will show you how to convert a string or a number to a byte array in your Dart and Flutter applications.

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Table Of Contents::

Converting a String into a Byte Array

Converting a Number into a Byte Array

Conclusion

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Converting a String into a Byte Array:

There is more than one method for transforming a given string into a byte array in Dart.

> Using the utf8.encode() method:
The utf8.encode() technique can be imported from Dart: convert takes a string and returns a list of UTF-8 bytes.

The code:

import 'dart:convert';

void main() {
  String text = 'FlutterDevs.com';
  List<int> bytes = utf8.encode(text);
  print(bytes);
}

When we run the application, we ought to get the screen’s output like the underneath screen Console Output.

[70, 108, 117, 116, 116, 101, 114, 68, 101, 118, 115, 46, 99, 111, 109]

Process finished with exit code 0

• > Using the codeUnits property of the String class:
  The codeUnits property of the String class returns a list of UTF-16 code units.

The code:

void main() {
  String text = 'FlutterDevs.com';
  List<int> bytes = text.codeUnits;
  print(bytes);
}

When we run the application, we ought to get the screen’s output like the underneath screen Console Output.

[70, 108, 117, 116, 116, 101, 114, 68, 101, 118, 115, 46, 99, 111, 109]

Process finished with exit code 0

• > Using the runes property of the String class:
  The runes property gives you an iterable of Unicode code points of a string.

The code:

void main() {
  String text = 'FlutterDevs.com Welcome you';
  Iterable<int> bytes = text.runes;

  List<int> list = bytes.toList();
  print(list);
}

When we run the application, we ought to get the screen’s output like the underneath screen Console Output.

[70, 108, 117, 116, 116, 101, 114, 68, 101, 118, 
115, 46, 99, 111, 109, 32, 87, 101, 108, 99, 111, 
109, 101, 32, 121, 111, 117]

Process finished with exit code 0

Converting a Number into a Byte Array:

To convert a number over entirely to a byte array, you can initially change it over completely to a string and afterward utilize one of the methodologies referenced in the past section to get the job done.

The code:

import "dart:convert";

void main() {
  int myInt = 2023;
  print(utf8.encode(myInt.toString()));

  double myDouble = 7.4235;
  print(utf8.encode(myDouble.toString()));
}

When we run the application, we ought to get the screen’s output like the underneath screen Console Output.

[50, 48, 50, 51]
[55, 46, 52, 50, 51, 53]

Process finished with exit code 0

Conclusion:

In the article, I have explained the Convert String & Number To Byte Array In Flutter & Dart; you can modify this code according to your choice. This was a small introduction to Convert String & Number To Byte Array In Flutter & Dart User Interaction from my side, and it’s working using Flutter.

I hope this blog will provide you with sufficient information on Trying the Convert String & Number To Byte Array In Flutter & Dart of your projects. So please try it.

❤ ❤ Thanks for reading this article ❤❤

If I got something wrong? Let me know in the comments. I would love to improve.

Clap 👏 If this article helps you.

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