How to read bytes of a local image file in Dart/Flutter?

Question

I would like to use a placeholder image file that I\'ve added to my code as \"assets/placeholder.png\", but I\'m getting a File not found error. This is how I\

Answer 1

Here is an example to read file byte by byte:

import 'dart:io';

void main(List arguments) {
  readFileByteByByte().then((done) {
    print('done');
  });
  print('waiting...');
  print('do something else while waiting...');
}

Future readFileByteByByte() async {
  //final fileName = 'C:\\code\\test\\file_test\\bin\\main.dart'; // use your image file name here
  final fileName = Platform.script.toFilePath(); //this will read this text file as an example
  final script = File(fileName);
  final file = await script.open(mode: FileMode.read);

  var byte;
  while (byte != -1) {
    byte = await file.readByte();
    if (byte == ';'.codeUnitAt(0)) { //check if byte is semicolon
      print(byte);
    }
  }
  await file.close();
  return (true);
}