Flutter银联支付插件union_pay的使用

银联支付SDK Flutter版插件，支持iOS，Android平台。

开始

在使用前强烈建议阅读银联官方接入指南。例如，在iOS上你还需要设置URL Scheme。

Android

目前暂时关闭了混淆。

iOS

在工程info.plist设置中添加一个URL Types，否则无法返回你的app。

在info.plist文件中添加白名单:

<key>LSApplicationQueriesSchemes</key>
<array>
    <string>uppaysdk</string>
    <string>uppaywallet</string>
    <string>uppayx1</string>
    <string>uppayx2</string>
    <string>uppayx3</string>
</array>

获取云闪付SDK版本号（iOS暂不支持）

var version = await UnionPay.uPayVersion();

检查云闪付App是否安装

var result = await UnionPay.isInstalled(mode: PaymentEnv.DEVELOPMENT, merchantInfo: "");

mode分为测试环境和生产环境，merchantInfo为商户标识。

支付

只需设置支付环境和交易流水号即可。

var result = await UnionPay.pay(
  mode: PaymentEnv.DEVELOPMENT,
  tn: "669802785406247611910", // 交易流水号
  scheme: "UnionPayTest", // 只对iOS有效
);

mode分为测试环境和生产环境，scheme只对iOS有效。

Flutter

支持Flutter空安全。

示例代码

import 'dart:convert';

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

import 'package:flutter/services.dart';
import 'package:union_pay/enum/union_pay_enum.dart';
import 'package:union_pay/union_pay.dart';

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

class MyApp extends StatefulWidget {
  [@override](/user/override)
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  [@override](/user/override)
  State<StatefulWidget> createState() => HomePageState();
}

class HomePageState extends State<HomePage> {
  String _platformVersion = 'Unknown';

  [@override](/user/override)
  void initState() {
    super.initState();
    initPlatformState();
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    String platformVersion;
    // Platform messages may fail, so we use a try/catch PlatformException.
    // We also handle the message potentially returning null.
    try {
      platformVersion = await UnionPay.uPayVersion();
      print("platformVersion===$platformVersion");
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });

    UnionPay.payListener((result) {
      showDialog(
        context: context,
        builder: (context) {
          return AlertDialog(
            title: Text('TEST'),
            content: Text(result.status.toString()),
          );
        },
      );
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Column(
          children: [
            Center(
              child: Text('Running on: $_platformVersion\n'),
            ),
            TextButton(
              onPressed: () {
                UnionPay.isInstalled(mode: PaymentEnv.DEVELOPMENT, merchantInfo: "").then((value) {
                  print("安装成功$value");
                });
              },
              child: Text('是否安装云支付App'),
            ),
            TextButton(
              onPressed: () {
                UnionPay.pay(
                  mode: PaymentEnv.DEVELOPMENT,
                  tn: "669802785406247611910",
                  scheme: "UnionPayTest",
                ).then((value) {
                  print("##########$value");
                });
              },
              child: Text('调起支付'),
            ),
          ],
        ),
      ),
    );
  }
}