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flutter - 颤振：sku_details_wrapper.g.dart 中的投射错误

问题描述

我在 Flutter 中遇到了一些麻烦。

flutter doctor -v输出：

[✓] Flutter (Channel stable, 2.5.1, on macOS 11.6 20G165 darwin-x64, locale en-IT)
    • Flutter version 2.5.1 at /Users/me/Developer/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ffb2ecea52 (6 days ago), 2021-09-17 15:26:33 -0400
    • Engine revision b3af521a05
    • Dart version 2.14.2

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at /Users/me/Library/Android/sdk
    • Platform android-30, build-tools 29.0.3
    • Java binary at: /Applications/AndroidStudio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 13.0, Build version 13A233
    • CocoaPods version 1.11.2

[✓] Android Studio (version 4.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
       https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
       https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6915495)

[✓] VS Code (version 1.60.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.26.0

[✓] Connected device (1 available)
    • SM G930F (mobile) • android-arm64 • Android 8.0.0 (API 26)

• No issues found!

我最近更新并将我的代码迁移到空安全并更新了所有依赖项；in_app_purchase因为我这样做了，所以我对包版本 1.0.8 ( https://pub.dev/packages/in_app_purchase )有一些问题。

当我在 Android 设备上运行该应用程序（iOS 设备工作）时出现错误：

Unhandled Exception: type 'int' is not a subtype of type 'String?' in type cast

打电话时：

ProductDetailsResponse response = await InAppPurchase.instance.queryProductDetails({'MY_PRODUCT_ID'});

在函数被调用后，VSCode 显示错误发生在sku_details_wrapper.g.dart文件中，并将 json 转换为SkuDetailsWrapper：

SkuDetailsWrapper _$SkuDetailsWrapperFromJson(Map json) {
  return SkuDetailsWrapper(
    description: json['description'] as String? ?? '',
    freeTrialPeriod: json['freeTrialPeriod'] as String? ?? '',
    introductoryPrice: json['introductoryPrice'] as String? ?? '',
    introductoryPriceMicros: json['introductoryPriceAmountMicros'] as String? ?? '',
    introductoryPriceCycles: json['introductoryPriceCycles'] as int? ?? 0,
    introductoryPricePeriod: json['introductoryPricePeriod'] as String? ?? '',
    price: json['price'] as String? ?? '',
    priceAmountMicros: json['priceAmountMicros'] as int? ?? 0,
    priceCurrencyCode: json['priceCurrencyCode'] as String? ?? '',
    priceCurrencySymbol: json['priceCurrencySymbol'] as String? ?? '',
    sku: json['sku'] as String? ?? '',
    subscriptionPeriod: json['subscriptionPeriod'] as String? ?? '',
    title: json['title'] as String? ?? '',
    type: const SkuTypeConverter().fromJson(json['type'] as String?),
    originalPrice: json['originalPrice'] as String? ?? '',
    originalPriceAmountMicros: json['originalPriceAmountMicros'] as int? ?? 0,
  );
}

特别是错误行是：

introductoryPriceMicros: json['introductoryPriceAmountMicros'] as String? ?? '',

它尝试将 int ( json['introductoryPriceAmountMicros']) 转换为 a String?。

你能帮我吗？我无法在网上找到任何帮助。

标签： fluttercastingin-app-purchasedart-null-safety

解决方案

in_app_purchase 的 1.0.9 版似乎已经解决了这个问题：https ://pub.dev/packages/in_app_purchase

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