dj_printer/example/lib/main.dart

import 'dart:async';
import 'dart:convert';

import 'package:barcode_widget/barcode_widget.dart';
import 'package:dj_printer/dj_printer.dart';
import 'package:dj_printer/src/device_model.dart';
import 'package:flutter/material.dart';
import 'package:permission_handler/permission_handler.dart';

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

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  List<Device> devices = [];

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

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    var per = await Permission.bluetooth.isGranted;
    if (!per) {
      Permission.bluetooth.request();
    }
    var pers = await Permission.locationWhenInUse.isGranted;
    if (!pers) {
      Permission.locationWhenInUse.request();
    }
    DjPrinter().init();
    DjPrinter().addDiscoveryListen(onReceive: (data) {
      var js = json.decode(data.toString());
      if ((js['name'] as String).startsWith('3R20P')) {
        devices.add(Device(
            name: js['name'],
            address: js['address'],
            isPaired: js['isPaired']));
      }

      setState(() {});
    }, onStart: () {
      print("————————————————————————");
    }, onFinish: () {
      print('——————————————————————————————');
      DjPrinter().cancelDiscovery();
    });
    DjPrinter().addConnectListen(onConnect: () {
      print("connected");
    }, onDisconnect: () {
      print('disconnected');
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Column(
            children: [
              TextButton(
                  onPressed: () {
                    devices.clear();
                    setState(() {});
                    DjPrinter().startSearch;
                  },
                  child: const Text('扫描设备')),
              // TextButton(onPressed: () {}, child: const Text('打印')),
              const SizedBox(
                height: 20,
              ),
              ...devices
                  .map((e) => TextButton(
                      onPressed: () {
                        DjPrinter().connect(e.address);
                      },
                      child: Text(e.name)))
                  .toList(),
              const SizedBox(
                height: 20,
              ),
              TextButton(
                  onPressed: () {
                    int i=0;
                    while ( i<10){
                    DjPrinter().printNewAScode(
                        code: 'ASSZ000000002',
                        barCode: 'ASSZ0000000020001',
                        channel: '加拿大温哥华海派快线-卡派 / UPS派送',
                        country: '美国',
                        num: '2',
                        sum:'9',
                        offset: 0,
                        hasPlan: true, );i++;}
                  },
                  child: const Text('打印')),

              const SizedBox(
                height: 20,
              ),
              TextButton(
                  onPressed: () {
                    DjPrinter().disposeConnect();
                  },
                  child: const Text('取消链接')),

              _getCard('ASSZ2022012500010002', '加拿大温哥华海派快线-卡派/UPS派送', '加拿大',
                  '10/20', 0, true)
            ],
          ),
        ),
      ),
    );
  }

  _getCard(String code, String channel, String country, String countStr,
      int offset, bool hasPlan) {
    return Container(
      margin: EdgeInsets.all(5),
      width: 90,
      height: 200,
      color: Colors.red,
      // decoration: BoxDecoration(
      //   border: Border.all(color: Colors.black,width: 2)
      // ),

      child: RotatedBox(
        quarterTurns: 1,
        child: BarcodeWidget(
          barcode: Barcode.code128(),
          data: code,
          style: TextStyle(
              fontSize: 10
          ),
        ),
      )

      //
      // Row(
      //   crossAxisAlignment: CrossAxisAlignment.center,
      //   children: [
      //     Container(
      //       width: 197 / 3.7,
      //       height: 950 / 3.7,
      //       decoration: BoxDecoration(
      //         color: Colors.white,
      //         border: Border(
      //             right: BorderSide(
      //               color: Colors.black,
      //               width: 0.5,
      //             )),
      //       ),
      //       alignment: Alignment.center,
      //       child: RotatedBox(
      //         quarterTurns: 3,
      //         child: Text(
      //           code,
      //           style: TextStyle(
      //               color: Colors.black,
      //               fontSize: 20,
      //               fontWeight: FontWeight.bold),
      //         ),
      //       ),
      //     ),
      //     Container(
      //         width: 215 / 3.7,
      //         height: 950 / 3.7,
      //         decoration: BoxDecoration(
      //           border: Border(
      //               right: BorderSide(
      //                 color: Colors.black,
      //                 width: 0.5,
      //               )),
      //         ),
      //         alignment: Alignment.center,
      //         child: Column(
      //           children: [
      //             Container(
      //               width: 215 / 3.7,
      //               height: 950 / 3.7 / 3,
      //               decoration: BoxDecoration(
      //                 border: Border(
      //                     bottom: BorderSide(
      //                       color: Colors.black,
      //                       width: 0.5,
      //                     )),
      //               ),
      //               alignment: Alignment.center,
      //               child: RotatedBox(
      //                 quarterTurns: 3,
      //                 child: Text(
      //                   country,
      //                   style: TextStyle(
      //                       color: Colors.black,
      //                       fontSize: 17,
      //                       fontWeight: FontWeight.bold),
      //                 ),
      //               ),
      //             ),
      //             Container(
      //               width: 215 / 3.7,
      //               height: 950 / 3.7 / 3 * 2 - 4,
      //               padding: EdgeInsets.symmetric(vertical: 10),
      //               alignment: Alignment.center,
      //               child: RotatedBox(
      //                 quarterTurns: 3,
      //                 child: Text(
      //                   channel,
      //                   style: TextStyle(
      //                     color: Colors.black,
      //                     fontSize: 15,
      //                   ),
      //                 ),
      //               ),
      //             )
      //           ],
      //         )),
      //     Container(
      //         width: 358   / 3.7 -20,
      //         height: 950 / 3.7,
      //         alignment: Alignment.center,
      //         child: Column(
      //           children: [
      //             Container(
      //               width: 358 / 3.7 -20,
      //               height: 950 / 3.7 / 3,
      //               decoration: BoxDecoration(
      //                 border: Border(
      //                     bottom: BorderSide(
      //                       color: Colors.black,
      //                       width: 0.5,
      //                     )),
      //               ),
      //               alignment: Alignment.center,
      //               child: RotatedBox(
      //                 quarterTurns: 3,
      //                 child: Text(
      //                   countStr,
      //                   style: TextStyle(
      //                       color: Colors.black,
      //                       fontSize: 17,
      //                       fontWeight: FontWeight.bold),
      //                 ),
      //               ),
      //             ),
      //             Container(
      //               width: 358 / 3.7 -30,
      //               height: 950 / 3.7 / 3 * 2 - 1.5,
      //               padding: EdgeInsets.only(left: 15,top: 15,bottom: 15,right: 10) ,
      //               child: RotatedBox(
      //                 quarterTurns: 3,
      //                 child: BarcodeWidget(
      //
      //                   barcode: Barcode.code128(),
      //                   data: code,
      //                   style: TextStyle(
      //                       fontSize: 10
      //                   ),
      //                 ),
      //               ),
      //             )
      //           ],
      //         )),
      //   ],
      // ),
    );
  }
}