Flutter收据生成插件receipt_generator的使用

receipt_generator 是一个用于在 Flutter 应用程序中生成支付收据的插件。它允许你创建并保存 PDF 格式的收据。

开始使用

要使用此插件，请将 receipt_generator 添加为你的 pubspec.yaml 文件中的依赖项：

dependencies:
  receipt_generator: ^0.0.5

然后运行 flutter pub get 命令来安装依赖。

使用示例

以下是一个完整的示例代码，演示如何使用 receipt_generator 插件生成 PDF 收据。

import 'package:flutter/material.dart';
import 'package:flutter_spinkit/flutter_spinkit.dart';
import 'package:open_file/open_file.dart';
import 'package:receipt_generator/receipt_generator.dart';

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: ReceiptGeneratorScreen(),
    );
  }
}

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

  [@override](/user/override)
  _ReceiptGeneratorScreenState createState() => _ReceiptGeneratorScreenState();
}

class _ReceiptGeneratorScreenState extends State<ReceiptGeneratorScreen> {
  bool _isLoading = false;

  Future<void> _generateReceipt() async {
    setState(() {
      _isLoading = true;
    });

    final generator = ReceiptGenerator();
    final data = {
      "number": "1234567890",
      "amount": 100.0,
      "transactionid": "TXN1234567890",
    };
    String logoPath = 'assets/kyrmann2.png';
    String fontPath = "assets/open-sans.regular.ttf";

    String thankYouMessage = "感谢您使用我们的服务。";
    String companyName = "Mlle Tabooret Royal";
    String colorHex = "bf8100";
    final localization = {
      'receiptTitle': '支付收据',
      'clientContact': '联系客户 :',
      'paymentMode': '支付方式 :',
      'amountPaid': '已付款金额 :',
      'transactionId': '交易ID :',
      'dateTime': '日期和时间 :',
    };

    try {
      final pdfPath = await generator.generateReceipt(
        data,
        logoPath,
        thankYouMessage,
        fontPath,
        companyName,
        colorHex,
        localization,
      );

      print('PDF generated at: $pdfPath');
    } catch (e) {
      print('Error generating PDF: $e');
    } finally {
      setState(() {
        _isLoading = false;
      });
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('收据生成器示例'),
      ),
      body: Center(
        child: _isLoading
            ? SpinKitFadingCircle(
                itemBuilder: (BuildContext context, int index) {
                  return const DecoratedBox(
                    decoration: BoxDecoration(
                        borderRadius: BorderRadius.all(Radius.circular(5)),
                        color: Colors.grey),
                  );
                },
              ) // 显示加载指示器
            : ElevatedButton(
                onPressed: _generateReceipt,
                child: const Text('生成收据'),
              ),
      ),
    );
  }
}

代码解释

导入必要的包：

import 'package:flutter/material.dart';
import 'package:flutter_spinkit/flutter_spinkit.dart';
import 'package:open_file/open_file.dart';
import 'package:receipt_generator/receipt_generator.dart';

定义主应用类：

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: ReceiptGeneratorScreen(),
    );
  }
}

定义生成收据的屏幕：

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

  [@override](/user/override)
  _ReceiptGeneratorScreenState createState() => _ReceiptGeneratorScreenState();
}

实现生成收据的逻辑：

class _ReceiptGeneratorScreenState extends State<ReceiptGeneratorScreen> {
  bool _isLoading = false;

  Future<void> _generateReceipt() async {
    setState(() {
      _isLoading = true;
    });

    final generator = ReceiptGenerator();
    final data = {
      "number": "1234567890",
      "amount": 100.0,
      "transactionid": "TXN1234567890",
    };
    String logoPath = 'assets/kyrmann2.png';
    String fontPath = "assets/open-sans.regular.ttf";

    String thankYouMessage = "感谢您使用我们的服务。";
    String companyName = "Mlle Tabooret Royal";
    String colorHex = "bf8100";
    final localization = {
      'receiptTitle': '支付收据',
      'clientContact': '联系客户 :',
      'paymentMode': '支付方式 :',
      'amountPaid': '已付款金额 :',
      'transactionId': '交易ID :',
      'dateTime': '日期和时间 :',
    };

    try {
      final pdfPath = await generator.generateReceipt(
        data,
        logoPath,
        thankYouMessage,
        fontPath,
        companyName,
        colorHex,
        localization,
      );

      print('PDF generated at: $pdfPath');
    } catch (e) {
      print('Error generating PDF: $e');
    } finally {
      setState(() {
        _isLoading = false;
      });
    }
  }

构建UI：

[@override](/user/override)
Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(
      title: const Text('收据生成器示例'),
    ),
    body: Center(
      child: _isLoading
          ? SpinKitFadingCircle(
              itemBuilder: (BuildContext context, int index) {
                return const DecoratedBox(
                  decoration: BoxDecoration(
                      borderRadius: BorderRadius.all(Radius.circular(5)),
                      color: Colors.grey),
                );
              },
            ) // 显示加载指示器
          : ElevatedButton(
              onPressed: _generateReceipt,
              child: const Text('生成收据'),
            ),
    ),
  );
}

更多关于Flutter收据生成插件receipt_generator的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html

zlyuanteng 1楼

更多关于Flutter收据生成插件receipt_generator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，下面是一个关于如何使用Flutter中的receipt_generator插件来生成收据的示例代码。这个示例将展示如何安装插件、初始化插件以及生成一个简单的收据。

1. 安装插件

首先，你需要在pubspec.yaml文件中添加receipt_generator插件的依赖：

dependencies:
  flutter:
    sdk: flutter
  receipt_generator: ^latest_version  # 请替换为实际可用的最新版本号

然后运行flutter pub get来安装插件。

2. 导入插件并生成收据

接下来，在你的Dart文件中（例如main.dart），导入插件并编写代码来生成收据。

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Receipt Generator Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: ReceiptGeneratorScreen(),
    );
  }
}

class ReceiptGeneratorScreen extends StatefulWidget {
  @override
  _ReceiptGeneratorScreenState createState() => _ReceiptGeneratorScreenState();
}

class _ReceiptGeneratorScreenState extends State<ReceiptGeneratorScreen> {
  late ReceiptGenerator receiptGenerator;

  @override
  void initState() {
    super.initState();
    receiptGenerator = ReceiptGenerator();
  }

  void generateReceipt() async {
    final receiptData = ReceiptData(
      store: 'My Store',
      date: DateTime.now(),
      items: [
        ReceiptItem(
          description: 'Item 1',
          quantity: 2,
          price: 10.0,
        ),
        ReceiptItem(
          description: 'Item 2',
          quantity: 1,
          price: 15.0,
        ),
      ],
      tax: 2.0,
      total: 32.0,
      paymentMethod: 'Cash',
      customFields: [
        CustomField(label: 'Customer Name', value: 'John Doe'),
        CustomField(label: 'Phone Number', value: '1234567890'),
      ],
    );

    final receiptImage = await receiptGenerator.generateReceiptImage(receiptData);

    // 这里你可以将生成的收据图像显示在Image组件中，或者保存到设备
    setState(() {
      // 例如，将收据图像保存到设备存储（这部分代码需要额外实现）
      // 或者显示收据图像
      // _receiptImage = receiptImage;
    });

    // 临时显示收据图像
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: Text('Generated Receipt'),
        content: Image.memory(receiptImage!),
        actions: <Widget>[
          TextButton(
            onPressed: () => Navigator.of(context).pop(),
            child: Text('Close'),
          ),
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Receipt Generator Demo'),
      ),
      body: Center(
        child: ElevatedButton(
          onPressed: generateReceipt,
          child: Text('Generate Receipt'),
        ),
      ),
    );
  }
}

// 辅助类定义（如果插件未提供，你需要自行定义）
class ReceiptData {
  String store;
  DateTime date;
  List<ReceiptItem> items;
  double tax;
  double total;
  String paymentMethod;
  List<CustomField> customFields;

  ReceiptData({
    required this.store,
    required this.date,
    required this.items,
    required this.tax,
    required this.total,
    required this.paymentMethod,
    required this.customFields,
  });
}

class ReceiptItem {
  String description;
  int quantity;
  double price;

  ReceiptItem({
    required this.description,
    required this.quantity,
    required this.price,
  });
}

class CustomField {
  String label;
  String value;

  CustomField({
    required this.label,
    required this.value,
  });
}

注意事项

插件版本：请确保使用receipt_generator插件的最新版本，并在pubspec.yaml文件中正确指定版本号。
依赖项：有些插件可能依赖于其他包或平台特定的代码，请仔细阅读插件的官方文档。
错误处理：示例代码未包含错误处理逻辑，在实际应用中，建议添加适当的错误处理来确保应用的健壮性。
UI定制：你可以根据需要进一步定制生成的收据的UI和格式。

这段代码提供了一个基本的框架，展示了如何使用receipt_generator插件来生成收据。根据具体需求，你可以进一步扩展和定制这个示例。