The Ultimate Guide Converting BASE64 String into Image with Flutter

Introduction:

Are you facing challenges in converting a BASE64 string into an image using Flutter? Look no further! In this comprehensive guide, we’ll walk you through the process step by step. Whether you’re decoding or encoding images stored in your Firebase database, we’ve got you covered. Let’s get started on this exciting journey.

Understanding the Conversion Process

Decoding a BASE64 String into an Image

When working with Flutter, decoding a BASE64 string into an image involves a few essential steps. In your code snippet, you are encountering an error related to assigning a value of type “List<int>” to a variable of type “Type”. Let’s troubleshoot this issue and find a solution.

Decoding the BASE64 String

Simplifying the Process with the ‘dart:convert’ Package

To simplify the decoding process, we can utilize the ‘dart:convert’ package. This package provides helpful methods for encoding and decoding data. We will make use of the base64Decode method to decode the BASE64 string into a Uint8List.

code









import 'dart:convert';
import 'dart:typed_data';
import 'package:flutter/widgets.dart';

Image imageFromBase64String(String base64String) {
  return Image.memory(base64Decode(base64String));
}

Uint8List dataFromBase64String(String base64String) {
  return base64Decode(base64String);
}

Encoding an Image into BASE64 String

The Reverse Process

To complete the picture, let’s explore how to encode an image into a BASE64 string. This process is equally important when you want to save images back to Firebase or transmit them over the network.

code




import 'dart:convert';
import 'dart:typed_data';

String base64String(Uint8List data) {
  return base64Encode(data);
}

Troubleshooting Common Errors

Handling the “FormatException: Invalid Length” Error

If you encounter the “FormatException: Invalid Length” error, it typically indicates that the length of the encoded data is not a multiple of 4. To resolve this issue, ensure that the BASE64 string you’re working with has a valid length. You can also verify the integrity of the encoded data

Conclusion:

How to convert a BASE64 string into an image with Flutter. By understanding the decoding and encoding processes, you can seamlessly handle images stored in your Firebase database. Utilizing the ‘dart:convert’ package and the provided code snippets, you can decode and encode images effortlessly. Empower your Flutter development skills and enhance your application’s functionality. Happy coding