Question

我可以在Android上购买订阅，并且订阅会显示在queryPastPurchases（）中，但是_listenToPurchaseUpdated（）方法在购买产品后从未触发。我知道这是flutter in_app_purchase先前版本中的一个错误，但据说已在0.2.1中修复。但是它似乎对我不起作用...我的代码有问题吗？

  /// The In App Purchase plugin
  InAppPurchaseConnection _iap = InAppPurchaseConnection.instance

  /// Updates to purchases
  StreamSubscription<List<PurchaseDetails>> _subscription;

  @override
  initState() {

    final Stream purchaseUpdates = InAppPurchaseConnection.instance.purchaseUpdatedStream;
    _subscription = purchaseUpdates.listen((purchases) {
      _purchases.addAll(purchases);
      _listenToPurchaseUpdated(_purchases);
    });

    super.initState();
  }

  /// Get all products available for sale
  Future<void> _getProducts() async {
    Set<String> ids = Set.from(['subscription_product']);
    ProductDetailsResponse response = await _iap.queryProductDetails(ids);

    setState(() {
      _products = response.productDetails;
    });

    if(response.error != null && response.error.message != null){
      setState(() {
        _iapStoreProblem = response.error.message;
      });
    }
  }

  void _buyProduct(ProductDetails prod) {
    final PurchaseParam purchaseParam = PurchaseParam(productDetails: prod);
    _iap.buyNonConsumable(purchaseParam: purchaseParam);
  }

Answer 1

我找到了解决方法。

原来我不得不使用

StreamSubscription _subscription;

代替

StreamSubscription<List<PurchaseDetails>> _subscription;

然后：

_subscription = _iap.purchaseUpdatedStream.listen((data) => setState(() {
    _purchases.addAll(data);
    _listenToPurchaseUpdated(data);
}));


void _listenToPurchaseUpdated(List<PurchaseDetails> purchaseDetailsList) {
    purchaseDetailsList.forEach((PurchaseDetails purchaseDetails) async {
      ...
    });
}

另外，请注意：Android上的PurchaseDetails.status为Null。

Flutter in_app_purchase 0.2.1 PurchaseUpdatedStream.listen在Android上不起作用

1 个答案: