Flutter插件flutter_topwise的介绍与使用

Flutter插件flutter_topwise的介绍与使用

简介

flutter_topwise 是一个新的 Flutter 插件项目。它是一个专门的包，包含针对 Android 和/或 iOS 的平台特定实现代码。

开始使用

初始化

首先，确保你已经将 flutter_topwise 添加到你的 pubspec.yaml 文件中：

dependencies:
  flutter_topwise: ^1.0.0

然后运行 flutter pub get 来获取依赖项。

示例代码

以下是使用 flutter_topwise 插件的基本示例代码：

import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_topwise/flutter_topwise.dart';
import 'package:flutter_topwise/print.dart'; // 假设这是插件提供的打印类

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

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

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final _topwisePlugin = FlutterTopwise();
  late String base64string;

  [@override](/user/override)
  void initState() {
    super.initState();
    start(); // 初始化一些数据
  }

  Future<void> start() async {
    // 加载资产文件中的图片并转换为 base64 字符串
    final ByteData assetByteData = await rootBundle.load("asset/receipt.jpeg");
    final Uint8List imagebytes = assetByteData.buffer.asUint8List();
    base64string = base64.encode(imagebytes); // 将字节转换为 base64 字符串
  }

  Future<void> initPayment() async {
    // 初始化支付
    _topwisePlugin.initialize(2000).then((value) {
      print(value); // 打印初始化结果
    });
  }

  printReceipt() {
    // 创建打印参数
    var args = Print(
      base64image: base64string,
      marchantname: "TECHNOLOGY HOMESITE",
      datetime: "2023-12-11 18:55",
      terminalid: "2LUX4199",
      merchantid: "2LUXAA0000",
      transactiontype: "CARD WITHDRAWAL",
      copytype: "Merchant",
      rrn: "MEDSON NAFTALI KIULA",
      stan: "904165",
      pan: "539983******1954",
      expiry: null,
      transactionstatus: "DECLINED",
      responsecode: "55",
      message: "Incorrect PIN",
      appversion: "1.5.3",
      amount: "2,000,000",
      bottommessage: "END OF LEGAL RECEIPT",
    );
    // 开始打印
    _topwisePlugin.startprinting(args).then((value) {
      print(value); // 打印结果
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: ElevatedButton(
            onPressed: () => printReceipt(), // 触发打印操作
            child: const Text('Print Receipt'), // 按钮文本
          ),
        ),
      ),
    );
  }
}