gv_print_plugin 0.0.2

gv_print_plugin: ^0.0.2 copied to clipboard

example/lib/main.dart

import 'dart:typed_data';

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

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

class MyApp extends StatefulWidget {
  const MyApp({super.key});

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

class _MyAppState extends State<MyApp> {
  final _gvPrintPlugin = GvPrintPlugin();

  // 基本方法：直接从 assets 加载为 Uint8List
  static Future<Uint8List> loadImageBytes(String assetPath) async {
    try {
      final ByteData data = await rootBundle.load(assetPath);
      return data.buffer.asUint8List();
    } catch (e) {
      print('Error loading image from assets: $e');
      throw e;
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        appBar: AppBar(title: const Text('金益M700打印插件')),
        body: Center(
          child: Column(
            children: [
              SizedBox(height: 30),
              OutlinedButton(
                onPressed: () async {
                  final Uint8List imageBytes = await loadImageBytes(
                    "assets/sunmi.jpg",
                  );
                  var res = await _gvPrintPlugin.printImage(imageBytes);
                  print(res);
                },
                child: Text("打印图片"),
              ),
              SizedBox(height: 30),
              OutlinedButton(
                onPressed: () async {
                  PrintParams params = PrintParams(
                    roadNetwork: '路网',
                    stationCode: '站码',
                    stationName: '收费站名称',
                    vehicleModel: '车型',
                    licensePlate: '车牌号码',
                    plateColor: '车牌颜色',
                    createDate: '2025-09-30 00:25:51',
                    couponNumber: '10000000000001',
                    qrcode: '二维码内容',
                  );
                  var res = await _gvPrintPlugin.printData(params);
                  print(res);
                },
                child: Text("打印通行纸券"),
              ),
            ],
          ),
        ),
      ),
    );
  }
}