Flutter

Question

我正在我的应用程序中进行应用内购买。我正在使用 Flutter-In-App-Purchase Plugin 来实现 IAP 功能。以下是我实现 IAP 的代码。

class InApp extends StatefulWidget {
  @override
  _InAppState createState() => _InAppState();
}

class _InAppState extends State<InApp> {
  StreamSubscription _purchaseUpdatedSubscription;
  StreamSubscription _purchaseErrorSubscription;
  StreamSubscription _conectionSubscription;
  final List<String> _productLists = Platform.isAndroid
      ? ["Buy Book"]
      : ["Buy Book"];

  List<IAPItem> _items = [];
  List<PurchasedItem> _purchases = [];

  @override
  void initState() {
    super.initState();
    initPlatformState();
  }

  @override
  void dispose() {
    if (_conectionSubscription != null) {
      _conectionSubscription.cancel();
      _conectionSubscription = null;
    }
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    // prepare
    var result = await FlutterInappPurchase.instance.initConnection;
    print('result: $result');

    if (!mounted) return;


    _conectionSubscription =
        FlutterInappPurchase.connectionUpdated.listen((connected) {
      print('connected: $connected');
    });

    _purchaseUpdatedSubscription =
        FlutterInappPurchase.purchaseUpdated.listen((productItem) {
      print('purchase-updated: $productItem');
    });

    _purchaseErrorSubscription =
        FlutterInappPurchase.purchaseError.listen((purchaseError) {
      print('purchase-error: $purchaseError');
    });
  }

  void _requestPurchase(IAPItem item) {
    FlutterInappPurchase.instance.requestPurchase(item.productId);
  }

  Future _getProduct() async {
    List<IAPItem> items = await FlutterInappPurchase.instance.getProducts(_productLists);
    for (var item in items) {
      print('${item.toString()}');
      this._items.add(item);
    }

    setState(() {
      this._items = items;
      this._purchases = [];
    });

    _getPurchases();
  }

  Future _getPurchases() async {
    List<PurchasedItem> items = await FlutterInappPurchase.instance.getAvailablePurchases();
    for (var item in items) {
      print('${item.toString()}');
      this._purchases.add(item);
    }

    setState(() {
      this._items = [];
      this._purchases = items;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: RaisedButton(
          onPressed: () {
            _requestPurchase(_items[0]);
          },
          child: Text("Buy Item"),
        ),
      ),
    );
  }
}

当我单击 BuyItem 并调用 requestPurchase() 方法时。我收到以下错误日志并收到类似 "the item you were attempting to purchase could not be found"

的错误

W/ActivityThread( 8794): handleWindowVisibility: no activity for token android.os.BinderProxy@572f129 W/ProxyBillingActivity( 8794): Activity finished with resultCode 0 and billing's responseCode: 6 W/BillingHelper( 8794): Couldn't find purchase lists, trying to find single data. W/BillingHelper( 8794): Received a bad purchase data. W/BillingHelper( 8794): Couldn't find single purchase data as well. E/DoobooUtils( 8794): Error Code : 6 I/flutter ( 8794): purchase-error: responseCode: 6, debugMessage: , code: E_UNKNOWN, message: An unknown or unexpected error has occured. Please try again later.

请提出解决方案。

谢谢。

Answer 1

我认为您的应用内商品将处于非活动状态。

默认情况下，当您在播放控制台中添加托管产品时，它会处于非活动状态。因此，只需在您的 google 游戏控制台帐户中访问您的应用内产品并验证它是否有效。

此外，请确保您 developing/testing 应用的 VersionCode 和 VersionName 至少应为 google 游戏开发者 console/play 商店中的版本。

对于 flutter，您可以在 pubspec.yaml 文件中检查版本控制。

Flutter - IAP 错误代码 6 和消息 "the item you were attempting to purchase could not be found"

Flutter - IAP error code 6 with message "the item you were attempting to purchase could not be found"

android

dart

in-app-purchase

android-inapp-purchase