flutter 对接 google play的内支付

  import 'package:in_app_purchase/in_app_purchase.dart';

Future<void> initiatePurchase() async {
    const String _kConsumableId = 'testproduct';
    const List<String> _kProductIds = <String>[_kConsumableId];
    //final bool available = await InAppPurchaseConnection.instance.isAvailable();
    final InAppPurchase _inAppPurchase = InAppPurchase.instance;
    final bool available = await _inAppPurchase.isAvailable();
    if (!available) {
      // handle error
      print('not available');
      return;
    }
    final ProductDetailsResponse productDetailResponse =
        await _inAppPurchase.queryProductDetails(_kProductIds.toSet());
    print("到此了");
    print(productDetailResponse);
    if (productDetailResponse.error != null) {
      // handle error
      return;
    }
    List<ProductDetails> products = productDetailResponse.productDetails;
    ProductDetails productDetails = productDetailResponse.productDetails.first;
    PurchaseParam purchaseParam = PurchaseParam(
      productDetails: productDetails,
    );
    await _inAppPurchase.buyNonConsumable(purchaseParam: purchaseParam);
    //BillingResult result = await InAppPurchaseConnection.instance.buyNonConsumable(purchaseParam: purchasePar
}

 判断购买成功

final StreamSubscription<List<PurchaseDetails>> _subscription =
    InAppPurchaseConnection.instance.purchaseUpdatedStream.listen((detailsList) {
  detailsList.forEach((PurchaseDetails purchaseDetails) async {
    if (purchaseDetails.status == PurchaseStatus.purchased ||
        purchaseDetails.status == PurchaseStatus.restored) {
      // 购买或恢复购买成功
      // TODO: 处理购买成功逻辑
      if (Platform.isIOS) {
        // 对于 iOS 平台，需要将交易完成状态告诉 App Store，并确保该状态已被验证。
        await InAppPurchaseConnection.instance.completePurchase(purchaseDetails);
      }
    } else if (purchaseDetails.status == PurchaseStatus.error) {
      // 购买失败
      // TODO: 处理购买失败逻辑
    }
  });
});

PurchaseStatus 是 Flutter 中的一个枚举类型，表示购买的状态。它包含以下几个值：

• PurchaseStatus.purchased: 表示购买已经完成。
• PurchaseStatus.pending: 表示交易已经被缓慢处理。
• PurchaseStatus.error: 表示购买遇到了错误。
• PurchaseStatus.restored: 表示已经恢复了先前的非消耗性购买。

当从 InAppPurchaseConnection 的 purchaseUpdatedStream 事件流中获取到 PurchaseDetails 对象时，我们可以通过检查 status 属性来判断购买的状态。

 

参考:

https://juejin.cn/s/flutter%20google%20play%20billing

https://pub.dev/packages/in_app_purchase/example