openBase64File function
Implementation
Future<void> openBase64File(String base64String, String fileName) async {
// Decode Base64 string to bytes
final bytes = base64Decode(base64String);
// Get the temporary directory
final directory = await getTemporaryDirectory();
// Create a file in the temporary directory
final file = File('${directory.path}/$fileName');
// Write the bytes to the file
await file.writeAsBytes(bytes);
// Open the file using open_file package
await OpenFile.open(file.path);
}