Flutter道路税费管理插件lao_roadtax_eticker的使用

发布于 1周前 作者 sinazl 来自 Flutter

Flutter道路税费管理插件lao_roadtax_eticker的使用

lao_roadtax_esticker

sticker

欢迎提交拉取请求。

安装

在pubspec.yaml文件中添加lao_roadtax_esticker：

dependencies:
  lao_roadtax_esticker: <release>

然后添加以下字体到你的项目中：

  fonts:
    - family: PhetsarathOT
      fonts:
        - asset: packages/lao_roadtax_eticker/fonts/Phetsarath_OT.ttf
    - family: RoadTaxIcons
      fonts:
       - asset: packages/lao_roadtax_eticker/fonts/RoadTaxIcons.ttf

使用

使用默认模板

import 'dart:io';
import 'package:flutter/material.dart';
import 'package:lao_roadtax_eticker/lao_roadtax_eticker.dart';

final LaoRoadTaxSticker createSticker = CreateLaoRoadTaxSticker();

final stickerByte = createSticker.createSticker(
  RoadTaxData(
    vehicleCode: "01",
    vehicleName: "ລົດຈັກ",
    licensePlateNumber: "ຍຫ 5578",
    licenseTypeName: "ເອກະຊົນ",
    province: "ກຳແພງນະຄອນ",
    chassisNumber: "RLHHC1207BY468177",
    engineDisplacement: "200",
    barcode: "M191090001020",
    amount: "550000",
    year: "2023",
    time: DateTime.now(),
  ),
);

if (stickerByte != null) {
  final imagePath = File('example_roadTaxSticker.png');
  if (!(await imagePath.exists())) {
    await imagePath.create();
  }
  // 写入临时目录
  await imagePath.writeAsBytes(stickerByte.buffer.asUint8List());
}

使用自定义背景图像模板

import 'dart:io';
import 'package:flutter/services.dart' show rootBundle;
import 'package:lao_roadtax_eticker/lao_roadtax_eticker.dart';

final data = await rootBundle.load("assets/<your_road_tax_background_image_template>.png");

final LaoRoadTaxSticker createSticker = CreateLaoRoadTaxSticker(roadTaxBackgroundTemplateImage: data);

final stickerByte = createSticker.createSticker(
  RoadTaxData(
    vehicleCode: "01",
    vehicleName: "ລົດຈັກ",
    licensePlateNumber: "ຍຫ 5578",
    licenseTypeName: "ເອກະຊົນ",
    province: "ກຳແພງນະຄອນ",
    chassisNumber: "RLHHC1207BY468177",
    engineDisplacement: "200",
    barcode: "M191090001020",
    amount: "550000",
    year: "2023",
    time: DateTime.now(),
  ),
);

将贴纸保存到图库

如果你需要将贴纸图像保存到图库，请使用gallery_saver包：

import 'dart:io';
import 'package:flutter/services.dart' show rootBundle;
import 'package:path_provider/path_provider.dart';
import 'package:image_gallery_saver/image_gallery_saver.dart';
import 'package:lao_roadtax_eticker/lao_roadtax_eticker.dart';

void saveSticker() async {
  try {
    final imageByte = await _createStickerFromLib();

    if (imageByte != null) {
      final directory = await getTemporaryDirectory();
      final imagePath = File('${directory.path}/roadTaxSticker.png');
      if (!(await imagePath.exists())) {
        await imagePath.create();
      }
      // 写入临时目录
      await imagePath.writeAsBytes(imageByte.buffer.asUint8List());

      final saveImage =
          await ImageGallerySaver.saveImage(imagePath.path);

      // 删除临时目录中的图像
      await imagePath.delete();
      if (saveImage == true) {
        print("---------- 保存成功");
      }
    }
  } catch (e) {
    print("----------$e");
  }
}

Future<ByteData?> _createStickerFromLib() async {
  final data = await rootBundle.load("assets/tam3.png");

  final LaoRoadTaxSticker createSticker =
      CreateLaoRoadTaxSticker(roadTaxBackgroundTemplateImage: data);
  final stickerByte = createSticker.createSticker(
    RoadTaxData(
      vehicleCode: "01",
      vehicleName: "ລົດຈັກ",
      licensePlateNumber: "ຍຫ 5578",
      licenseTypeName: "ເອກະຊົນ",
      province: "ກຳແພງນະຄອນ",
      chassisNumber: "RLHHC1207BY468177",
      engineDisplacement: "200",
      barcode: "M191090001020",
      amount: "550000",
      year: "2023",
      time: DateTime.now(),
    ),
  );

  return stickerByte;
}

显示贴纸

import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart' show rootBundle;
import 'package:image_gallery_saver/image_gallery_saver.dart';
import 'package:lao_roadtax_eticker/lao_roadtax_eticker.dart';

class StrikerRoadTax extends StatelessWidget {
  const StrikerRoadTax({super.key});

  [@override](/user/override)
  Widget build(BuildContext context) {
    return FutureBuilder<ByteData?>(
      future: _createStickerFromLib(),
      builder: (BuildContext context, AsyncSnapshot<ByteData?> snapshot) {
        if (snapshot.connectionState == ConnectionState.waiting) {
          return const Text("加载中...");
        }
        if (snapshot.hasError) {
          return Text("${snapshot.error}");
        }
        return Image.memory(Uint8List.view(snapshot.data!.buffer));
      },
    );
  }
}

Future<ByteData?> _createStickerFromLib() async {
  final data = await rootBundle.load("assets/tam3.png");

  final LaoRoadTaxSticker createSticker =
      CreateLaoRoadTaxSticker(roadTaxBackgroundTemplateImage: data);
  final stickerByte = createSticker.createSticker(
    RoadTaxData(
      vehicleCode: "01",
      vehicleName: "ລົດຈັກ",
      licensePlateNumber: "ຍຫ 5578",
      licenseTypeName: "ເອກະຊົນ",
      province: "ກຳແພງນະຄອນ",
      chassisNumber: "RLHHC1207BY468177",
      engineDisplacement: "200",
      barcode: "M191090001020",
      amount: "550000",
      year: "2023",
      time: DateTime.now(),
    ),
  );

  return stickerByte;
}

更多关于Flutter道路税费管理插件lao_roadtax_eticker的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

1 回复

更多关于Flutter道路税费管理插件lao_roadtax_eticker的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html


当然，以下是如何在Flutter项目中集成和使用lao_roadtax_eticker插件的示例代码。这个插件假设是用于管理老挝的道路税费（电子票据）。由于lao_roadtax_eticker插件的具体实现和API细节可能并不公开或者已知，以下示例代码基于一个假设的插件API结构。如果实际插件的API不同，请根据实际文档进行调整。

1. 添加依赖

首先，在你的pubspec.yaml文件中添加lao_roadtax_eticker依赖：

dependencies:
  flutter:
    sdk: flutter
  lao_roadtax_eticker: ^latest_version  # 请替换为实际最新版本号

然后运行flutter pub get来获取依赖。

2. 导入插件

在你的Dart文件中导入插件：

import 'package:lao_roadtax_eticker/lao_roadtax_eticker.dart';

3. 初始化插件

通常，插件可能需要一些初始化步骤，比如设置API密钥或进行身份验证。以下是一个假设的初始化代码：

void initRoadTaxPlugin() async {
  // 假设插件有一个初始化方法需要API密钥
  await LaoRoadTaxEticker.initialize('your_api_key_here');
}

4. 使用插件功能

假设插件提供了获取车辆税费信息、支付税费等功能，以下是如何使用这些功能的示例代码：

获取车辆税费信息

Future<void> fetchVehicleTaxInfo(String vehicleRegistrationNumber) async {
  try {
    var taxInfo = await LaoRoadTaxEticker.getVehicleTaxInfo(vehicleRegistrationNumber);
    print('Vehicle Tax Info: $taxInfo');
  } catch (e) {
    print('Error fetching vehicle tax info: $e');
  }
}

支付税费

Future<void> payVehicleTax(String vehicleRegistrationNumber, double amount) async {
  try {
    var paymentResult = await LaoRoadTaxEticker.payVehicleTax(vehicleRegistrationNumber, amount);
    if (paymentResult.success) {
      print('Payment successful: $paymentResult');
    } else {
      print('Payment failed: ${paymentResult.errorMessage}');
    }
  } catch (e) {
    print('Error paying vehicle tax: $e');
  }
}

5. 完整示例

以下是一个完整的Flutter页面示例，展示如何集成和使用lao_roadtax_eticker插件：

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Road Tax Management',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: RoadTaxScreen(),
    );
  }
}

class RoadTaxScreen extends StatefulWidget {
  @override
  _RoadTaxScreenState createState() => _RoadTaxScreenState();
}

class _RoadTaxScreenState extends State<RoadTaxScreen> {
  @override
  void initState() {
    super.initState();
    initRoadTaxPlugin();
  }

  void initRoadTaxPlugin() async {
    // 假设插件有一个初始化方法需要API密钥
    await LaoRoadTaxEticker.initialize('your_api_key_here');
  }

  void _fetchVehicleTaxInfo() async {
    String vehicleRegistrationNumber = 'LA123456'; // 示例车牌号
    fetchVehicleTaxInfo(vehicleRegistrationNumber);
  }

  void _payVehicleTax() async {
    String vehicleRegistrationNumber = 'LA123456'; // 示例车牌号
    double amount = 100000.0; // 假设税费金额
    payVehicleTax(vehicleRegistrationNumber, amount);
  }

  Future<void> fetchVehicleTaxInfo(String vehicleRegistrationNumber) async {
    try {
      var taxInfo = await LaoRoadTaxEticker.getVehicleTaxInfo(vehicleRegistrationNumber);
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Vehicle Tax Info: $taxInfo')));
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Error fetching vehicle tax info: $e')));
    }
  }

  Future<void> payVehicleTax(String vehicleRegistrationNumber, double amount) async {
    try {
      var paymentResult = await LaoRoadTaxEticker.payVehicleTax(vehicleRegistrationNumber, amount);
      if (paymentResult.success) {
        ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Payment successful')));
      } else {
        ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Payment failed: ${paymentResult.errorMessage}')));
      }
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Error paying vehicle tax: $e')));
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Road Tax Management'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            ElevatedButton(
              onPressed: _fetchVehicleTaxInfo,
              child: Text('Fetch Vehicle Tax Info'),
            ),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: _payVehicleTax,
              child: Text('Pay Vehicle Tax'),
            ),
          ],
        ),
      ),
    );
  }
}

注意

  • 由于lao_roadtax_eticker插件的实际API和功能未知，上述代码基于假设的API结构。
  • 请参考插件的实际文档和API参考进行集成。
  • 确保处理所有可能的错误和异常情况，特别是在进行网络请求和支付操作时。
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