ESC POS Printer for Flutter

Flutter plugin to connect and print on ESC POS Printers.

Installation

Use this package as a library

1. Depend on it Add this to your package's pubspec.yaml file:

dependencies:
  escposprinter:
    git:
        url: https://github.com/marcusfelix/esc-pos-printer-flutter.git
        ref: master

2. Install it You can install packages from the command line:

with Flutter:

$ flutter packages get

Alternatively, your editor might support flutter packages get. Check the docs for your editor to learn more.

3. Import it Now in your Dart code, you can use:

import 'package:flutter_webview_plugin/flutter_webview_plugin.dart';

Example

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:escposprinter/escposprinter.dart';

void main() => runApp(new MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => new _MyAppState();
}

class _MyAppState extends State<MyApp> {
  List devices = [];
  bool connected = false;

  @override
  initState() {
    super.initState();
    _list();
  }

  _list() async {
    List returned;
    try {
      returned = await Escposprinter.getUSBDeviceList;
    } on PlatformException {
      //response = 'Failed to get platform version.';
    }
    setState((){
      devices = returned;
    });
  }

  _connect(int vendor, int product) async {
    bool returned;
    try {
      returned = await Escposprinter.connectPrinter(vendor, product);
    } on PlatformException {
      //response = 'Failed to get platform version.';
    }
    if(returned){
      setState((){
        connected = true;
      });
    }
  }

  _print() async {
    try {
      await Escposprinter.printText("Testing ESC POS printer...");
    } on PlatformException {
      //response = 'Failed to get platform version.';
    }
  }

  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Scaffold(
        appBar: new AppBar(
          title: new Text('ESC POS'),
          actions: <Widget>[
            new IconButton(
              icon: new Icon(Icons.refresh), 
              onPressed: () {
                _list();
              }
            ),
            connected == true ? new IconButton(
              icon: new Icon(Icons.print), 
              onPressed: () {
                _print();
              }
            ) : new Container(),
          ],
        ),
        body: devices.length > 0 ? new ListView(
          scrollDirection: Axis.vertical,
          children: _buildList(devices),
        ) : null,
      ),
    );
  }

  List<Widget> _buildList(List devices){
    return devices.map((device) => new ListTile(
      onTap: () {
        _connect(int.parse(device['vendorid']), int.parse(device['productid']));
      },
      leading: new Icon(Icons.usb),
      title: new Text(device['manufacturer'] + " " + device['product']),
      subtitle: new Text(device['vendorid'] + " " + device['productid']),
    )).toList();
  }
}