问题
QueryInventoryFinishedListener of IabHelper has not returned the expired subscription items.
On the other hand, PurchaseHistoryResponseListener of Google Play Billing Library seems to receive all purchased items, which is including expired items.
On Google Play Billing Library, we have to check the purchased date of PurchaseHistoryResponseListener and each expiration date of items?
回答1:
queryPurchases vs queryPurchaseHistoryAsync
Generally, we should use queryPurchases(String skuType), which does not returns expired items. queryPurchaseHistoryAsync returns enabled and disabled items, as you see the documentation like following.
queryPurchases
Get purchases details for all the items bought within your app. This method uses a cache of Google Play Store app without initiating a network request.
queryPurchaseHistoryAsync
Returns the most recent purchase made by the user for each SKU, even if that purchase is expired, canceled, or consumed.
About queryPurchaseHistoryAsync
I could not image the use case for queryPurchaseHistoryAsync. If we need to use queryPurchaseHistoryAsync, we need the implementation to check if it is expired or not.
private PurchaseHistoryResponseListener listener = new PurchaseHistoryResponseListener() {
@Override
public void onPurchaseHistoryResponse(int responseCode, List<Purchase> purchasesList) {
for (Purchase purchase : purchasesList) {
if (purchase.getSku().equals("sku_id")) {
long purchaseTime = purchase.getPurchaseTime();
// boolean expired = purchaseTime + period < now
}
}
}
};
Purchase object does not have the information of period, so the above period must be acquired from BillingClient.querySkuDetailsAsync or be hard-coded. The following is sample implementation to use querySkuDetailsAsync.
List<String> skuList = new ArrayList<>();
skuList.add("sku_id");
SkuDetailsParams.Builder params = SkuDetailsParams.newBuilder();
params.setSkusList(skuList).setType(BillingClient.SkuType.SUBS);
billingClient.querySkuDetailsAsync(params.build(), new SkuDetailsResponseListener() {
@Override
public void onSkuDetailsResponse(int responseCode, List<SkuDetails> skuDetailsList) {
if (skuDetailsList == null) {
return;
}
for (SkuDetails skuDetail : skuDetailsList) {
if (skuDetail.getSku().equals("sku_id")) {
String period = skuDetail.getSubscriptionPeriod();
}
}
}
});
来源：https://stackoverflow.com/questions/46825023/how-to-check-the-expiration-for-subscription-items