# 使用 Google Play 计费扩展

> 了解如何将特定于 Google Play 的扩展与 Unity IAP 集成以增强购买处理和订阅管理。

访问特定于 Google Play 的 Unity IAP 扩展。使用混淆的帐户和配置文件 ID 进行欺诈预防和帐户关联，并在用户修改订阅层级时监听延迟订阅付款更改。

## 扩展功能##extended-functionality

了解如何将特定于 Google Play 的功能与 Unity IAP 结合使用。

### 设置和读取混淆的 ID##set-and-read-obfuscated-ids

使用混淆的帐户和配置文件 ID 将购买与用户帐户关联，同时保护用户隐私。这些标识符有助于欺诈检测，并可将购买关联到您的后端用户系统。

> **Note:**
>
> 使用 [`IGooglePlayStoreExtendedService`](https://docs.unity3d.com/Packages/com.unity.purchasing@latest?subfolder=/api/UnityEngine.Purchasing.IGooglePlayStoreExtendedService.html) 设置混淆的 ID，但使用 [`IGooglePlayStoreExtendedPurchaseService`](https://docs.unity3d.com/Packages/com.unity.purchasing@latest?subfolder=/api/UnityEngine.Purchasing.IGooglePlayStoreExtendedPurchaseService.html) 从订单中读取。

```cs
using UnityEngine.Purchasing;

class GooglePlayObfuscatedIdsSample
{
    static void SetObfuscatedIds(StoreController storeController, string profileId, string accountId)
    {
        var googlePlayStoreService = storeController.GooglePlayStoreExtendedService;
        if (googlePlayStoreService != null)
        {
            googlePlayStoreService.SetObfuscatedProfileId(profileId);
            googlePlayStoreService.SetObfuscatedAccountId(accountId);
        }
    }
    
    static void ReadObfuscatedIdsUsingConvenienceFunction(StoreController storeController, Order order)
    {
        var googlePlayPurchasingService = storeController.GooglePlayStoreExtendedPurchaseService;
        if (googlePlayPurchasingService != null)
        {
            var obfuscatedProfileId = googlePlayPurchasingService.GetObfuscatedProfileId(order);
            var obfuscatedAccountId = googlePlayPurchasingService.GetObfuscatedAccountId(order);
            //...
        }
    }

    static void ReadObfuscatedIdsFromOrder(Order order)
    {
        var profileId = order.Info.Google?.ObfuscatedProfileId;
        var accountId = order.Info.Google?.ObfuscatedAccountId;
    }
}
```

### 监听延迟订阅更改##listen-for-deferred-subscription-changes

当用户使用延迟付款更改其订阅层级（升级或降级）时，更改将在下一个续订日期生效。使用此监听器可在发生此类更改时收到通知，以便您可以更新 UI 或通知用户他们即将进行的订阅更改。

```cs
using UnityEngine.Purchasing;

class AddGoogleEventListenersSample
{
    void AddGoogleEventListeners(StoreController storeController)
    {
        var googlePlayPurchasingService = storeController.GooglePlayStoreExtendedPurchaseService;
        if (googlePlayPurchasingService != null)
        {
            googlePlayPurchasingService.OnDeferredPaymentUntilRenewalDate += OnDeferredPaymentUntilRenewalDate;
        }
    }

    void OnDeferredPaymentUntilRenewalDate(DeferredPaymentUntilRenewalDateOrder deferredPaymentOrder)
    {
        var currentOrder = deferredPaymentOrder.CurrentOrder;
        var nextSubscriptionProduct = deferredPaymentOrder.SubscriptionOrdered;
        //...
    }
}
```