Flutter-printer/lib/printer.dart

import 'dart:io';
import 'dart:async';
import 'package:flutter/services.dart';

class Printer {
  static const MethodChannel _channel = const MethodChannel('printer');

  static Future<String> get platformVersion async {
    final String version = await _channel.invokeMethod('getPlatformVersion');
    return version;
  }

  Future<dynamic> obtenerDispositivos() async {
    var result = await _channel.invokeMethod('getDeviceList');
    return result;
  }

  Future<dynamic> estaConectado() async {
    var result = await _channel.invokeMethod('isConnected');
    return result;
  }

  Future<dynamic> conectar(String mac) async {
    var result = await _channel.invokeMethod('connect', {'mac': mac});
    return result;
  }

  Future<dynamic> desconectar() async {
    var result = await _channel.invokeMethod('disconnect');
    return result;
  }

  Future<dynamic> imprimirTexto(String texto) async {
    var result = await _channel.invokeMethod('printText', {'text': texto});
    return result;
  }

  Future<dynamic> imprimirImagen(File imagen) async {
    var result = await _channel.invokeMethod('printBitmap', {'bitmap': imagen.readAsBytesSync()});
    return result;
  }

  Future<dynamic> imprimirImagen2(File imagen) async {
    var result = await _channel.invokeMethod('printBitmap2', {'bitmap': imagen.readAsBytesSync()});
    return result;
  }
}