Reminder: By Aug 31, 2025, all new apps and updates to existing apps must use Billing Library version 7 or newer. If you need more time to update your app, you can request an extension until Nov 1, 2025. Learn about Play Billing Library version deprecation.
Google Play 结算系统是一项可让您在 Android 应用中销售数字商品和内容的服务。无论您是要通过一次性购买交易创收，还是要为用户提供订阅服务，它都能帮您搞定。Google Play 提供了一整套 API，可集成到您的 Android 应用和服务器后端，从而为您的用户提供熟悉又安全的 Google Play 购买交易服务。
集成架构
本部分介绍了您可以构建的不同功能模块，以及可简化流程的 API 和库。
图 1. 典型 Google Play 结算服务集成的示意图。
您可以使用 Play 结算库，将 Google Play 结算系统集成到您的 Android 应用。Play 结算库可与 Google Play 服务层进行通信，为应用中的每个用户提供本地化产品/服务，以及提供处理其他必要用户操作（例如启动购买流程和处理相应结果）所需的方法。
您还应将 Google Play 结算系统集成到您的服务器后端，以创建必要的开发者流程。若要确保实现高效安全的购买交易管理和跨平台授权，这一点至关重要。您可以使用 Google Play Developer API 提供的 Subscriptions and In-App Purchases API 来创建此集成。后端集成还可运用一些 Google Cloud Platform 工具。
图 2. Google Play Developer API 提供的 API 和服务。
术语
本部分列出并说明了将 Google Play 结算系统集成到您的应用中时可能会遇到的高级技术和概念。在您按照集成指南操作的同时，请参考这份列表。
[null,null,["最后更新时间 (UTC)：2025-07-27。"],[],[],null,["# Google Play's billing system is a service that enables you to sell digital products\nand content in your Android app, whether you want to monetize through one-time\npurchases or offer subscriptions to your services. Google Play offers a full set\nof APIs for integration with both your Android app and your server backend that\nunlock the familiarity and safety of Google Play purchases for your users.\n| **Note:** Google Play's billing system is only for digital items. For physical goods and services, or other non-digital content, see the [Google Pay SDK](https://developers.google.com/pay/api/android/overview).\n\nIntegration architecture\n------------------------\n\nThis section introduces the different functional modules that you can build and\nthe APIs and libraries available to simplify the process.\n**Figure 1.** Diagram of a typical Google Play billing integration.\n\nYou can integrate Google Play's billing system with your Android app using the [Play\nBilling Library](/reference/com/android/billingclient/classes). This library\nenables communication with the Google Play Services layer that provides the\nlocalized product offering available to each user in your app, as well as\nmethods to handle other necessary user operations, like launching the purchase\nflow and handling its outcome.\n\nYou should also integrate Google Play's billing system with your server backend to\ncreate the necessary developer flows. This is essential to guarantee that your\npurchase management and cross-platform entitlements are efficient and secure.\nYou can create this integration with the [Subscriptions and in-app purchases\nAPI](https://developers.google.com/android-publisher#subscriptions) provided by\nthe Google Play Developer API. The backend integration also leverages some\nGoogle Cloud platform tools.\n**Figure 2.** APIs and services provided by the Google Play Developer API.\n\nTerminology\n-----------\n\nThis section lists and describes the high-level technologies and concepts that\nyou might encounter when integrating Google Play's billing system into your app.\nReference this list as you proceed through the integration guidance.\n\n### Technologies\n\n- [**Google Play**](https://play.google.com). An online store where users can download apps and other digital products.\n- [**Google Play Console**](https://play.google.com/console). A platform that provides an interface where you can publish your app to Google Play. The Google Play Console also shows details about your app, including any products or content that you sell with Google Play.\n- [**Google Cloud Console**](https://console.developers.google.com/). A platform that manages backend APIs, such as the Google Play Developer API.\n- [**Google Play Billing Library**](/google/play/billing/integrate). An API that you can use to integrate Google Play's billing system into your app.\n- [**Google Play Developer API**](https://developers.google.com/android-publisher/). A REST API that you can use to programmatically handle publishing and app management tasks.\n- [**Cloud Pub/Sub**](https://cloud.google.com/pubsub/). A fully managed real-time messaging service that enables you to send and receive messages between independent applications. Google Play uses Cloud Pub/Sub to deliver Real-time developer notifications. To use [Cloud\n Pub/Sub](https://cloud.google.com/pubsub/), you must have a project on the [Google Cloud Platform (GCP)](https://cloud.google.com/) with the Cloud Pub/Sub API enabled. If you aren't familiar with GCP and Cloud Pub/Sub, see the [Quickstart guide](https://cloud.google.com/pubsub/docs/quickstart-console).\n- [**Real-time developer notifications**](/google/play/billing/getting-ready#configure-rtdn). A mechanism that lets you monitor state changes for Google Play-managed subscriptions in real time by leveraging [Cloud\n Pub/Sub](https://cloud.google.com/pubsub).\n- **Secure backend server**. As part of integrating Google Play's billing system into your app, we strongly recommend that you use a secure backend server to implement billing-related tasks such as purchase verification, subscription-specific features, and handling Real-time developer notifications.\n- **Google Play Store app**. An app that manages all operations related to Google Play. All requests made by your app are handled by the Google Play Store app.\n\n### Concepts\n\n- **Flow** . A flow shows the typical steps involved in a billing-related task. For example, a *purchase flow* outlines the steps involved when a user purchases your product. A *subscription flow* might show how a subscription transitions between states.\n- **Entitlement** . When a user purchases an in-app product, they are then *entitled* to that product within your app. For one-time products, this means that the user should now have permanent access to the product. For subscriptions, this means that the user should have access while the subscription is active.\n- **Product ID**. The ID of a specific product type.\n- **Purchase token**. A string that represents a buyer's entitlement to a product on Google Play. It indicates that a Google user has paid for a specific product.\n- **Order ID** . A string that represents a financial transaction on Google Play. An order ID is created every time a financial transaction occurs. This string is included in a receipt that is emailed to the buyer. You can use the order ID to manage refunds in the **Order Management** section of the Google Play Console. Order IDs are also used in sales and payout reports.\n\nNext steps\n----------\n\nTo begin integrating Google Play's billing system with your app and server backend,\nsee the [setup guide](/google/play/billing/getting-ready)."]]
