bluetooth_thermal_printer 0.0.1

A simple Flutter plugin to connect to bluetooth printers

example/lib/main.dart

import 'dart:async';

import 'package:bluetooth_thermal_printer/bluetooth_thermal_printer.dart';
import 'package:esc_pos_utils/esc_pos_utils.dart';
import 'package:flutter/material.dart';

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

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

class _MyAppState extends State<MyApp> {
  @override
  void initState() {
    super.initState();
  }

  bool connected = false;
  List availableBluetoothDevices = new List();

  Future<void> getBluetooth() async {
    final List bluetooths = await BluetoothThermalPrinter.getBluetooths;
    print("Print $bluetooths");
    setState(() {
      availableBluetoothDevices = bluetooths;
    });
  }

  Future<void> setConnect(String mac) async {
    final String result = await BluetoothThermalPrinter.connect(mac);
    print("state conneected $result");
    if (result == "true") {
      setState(() {
        connected = true;
      });
    }
  }

  Future<void> printTicket() async {
    String isConnected = await BluetoothThermalPrinter.connectionStatus;
    if (isConnected == "true") {
      Ticket ticket = await getTicket();
      final result = await BluetoothThermalPrinter.writeBytes(ticket.bytes);
      print("Print $result");
    } else {
      //Hadnle Not Connected Senario
    }
  }

  Future<Ticket> getTicket() async {
    CapabilityProfile profile = await CapabilityProfile.load();
    final Ticket ticket = Ticket(PaperSize.mm58, profile);

    ticket.text('Test', styles: PosStyles(bold: true));
    ticket.cut();

    return ticket;
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Bluetooth Thermal Printer Demo'),
        ),
        body: Container(
          padding: EdgeInsets.all(20),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text("Search Paired Bluetooth"),
              OutlineButton(
                onPressed: () {
                  this.getBluetooth();
                },
                child: Text("Search"),
              ),
              Container(
                height: 200,
                child: ListView.builder(
                  itemCount: availableBluetoothDevices.length > 0
                      ? availableBluetoothDevices.length
                      : 0,
                  itemBuilder: (context, index) {
                    return ListTile(
                      onTap: () {
                        String select = availableBluetoothDevices[index];
                        List list = select.split("#");
                        String name = list[0];
                        String mac = list[1];
                        this.setConnect(mac);
                      },
                      title: Text('${availableBluetoothDevices[index]}'),
                      subtitle: Text("Click to connect"),
                    );
                  },
                ),
              ),
              SizedBox(
                height: 30,
              ),
              OutlineButton(
                onPressed: connected ? this.printTicket : null,
                child: Text("Print Ticket"),
              ),
            ],
          ),
        ),
      ),
    );
  }
}