sunmi_printer 0.0.1

Sunmi device with build in printer plugin. Tested V2 Pro device.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:sunmi_printer/sunmi_printer.dart';

void main() {
  runApp(MyApp());
}

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

class _MyAppState extends State<MyApp> {

  TextEditingController _textController = TextEditingController();

  String _printerStatus = '';

  @override
  void initState() {
    super.initState();
    _bindingPrinter();
  }

  Future<bool> _bindingPrinter() async {
    final bool result = await SunmiPrinter.bindingPrinter();
    return result;
  }

  Future<void> _getPrinterStatus() async {
    final String result = await SunmiPrinter.getPrinterStatus();

    _printerStatus = result;
  }

  Future<void> _printText(String text) async {
    if (_printerStatus == 'Works normally') {
      print('printing..');
      try {
        await SunmiPrinter.start();
        await SunmiPrinter.printText(text);
        await SunmiPrinter.commit();
      } catch(e) {
        await SunmiPrinter.cancel();
      }

    }
  }

  // Platform messages are asynchronous, so we initialize in an async method.

  @override
  Widget build(BuildContext context) {
    _getPrinterStatus();
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Container(
            color: Colors.white,
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              crossAxisAlignment: CrossAxisAlignment.stretch,
              children: <Widget>[
                Text(
                  'Printer Status: $_printerStatus',
                  textAlign: TextAlign.center,
                ),
                Padding(
                  padding: EdgeInsets.symmetric(horizontal: 30.0),
                  child: TextFormField(
                    controller: _textController,
                    decoration: const InputDecoration(
                      hintText: 'Enter print text',
                    ),
                    validator: (value) {
                      if (value.isEmpty) {
                        return 'Please enter some text';
                      }
                      return null;
                    },
                  ),
                ),
                Padding(
                  padding: EdgeInsets.symmetric(horizontal: 30.0),
                  child: FlatButton(
                    color: Colors.amberAccent,
                    onPressed: () => {
                      this._printText('${_textController.text}')
                    },
                    child: Text('Print'),
                  ),
                )
              ],
            ),
          ),
        ),
      ),
    );
  }
}