明确的号召性用语。在用户同意页面上提供明确的号召性用语，例如“同意并关联”。这是因为用户需要了解他们需要与 Google 分享哪些数据才能关联账号。
能够取消。为用户提供返回或取消链接的途径，如果用户选择不进行关联。
能够解除关联。提供一种供用户解除关联的机制，例如指向他们在您的平台上账号设置的网址。或者，您也可以添加指向 Google 账号的链接，以便用户管理其关联的账号。
能够更改用户账号。建议用户切换账号的方法。如果用户通常拥有多个账号，这种做法尤为有益。
如果用户必须关闭意见征求界面才能切换账号，请向 Google 发送可恢复的错误，以便用户可以使用 OAuth 关联和隐式流程登录所需的账号。
添加您的徽标。在同意屏幕上显示您的公司徽标。
按照您的样式准则放置徽标。如果您还想显示 Google 的徽标，请参阅徽标和商标。
图 2. 账号关联意见征求界面设计指南。
App Flip auf OAuth-Basis einrichten
In den folgenden Abschnitten werden die Voraussetzungen für den App-Flip auf OAuth-Basis und die Konfiguration Ihres App-Flip-Projekts in der Actions Console beschrieben.
Aktion erstellen und OAuth 2.0-Server einrichten
Bevor Sie App Flip konfigurieren können, müssen Sie Folgendes tun:
Aktion erstellen Folgen Sie der Anleitung im Abschnitt Projekt erstellen, um eine Aktion zu erstellen.
Wenn Sie Ihren Client optional konfigurieren möchten, fügen Sie unter Client konfigurieren (optional) Bereiche hinzu und klicken Sie auf Bereich hinzufügen.
Klicken Sie andernfalls auf Weiter.
Geben Sie unter „Testanleitung“ test (oder einen beliebigen anderen String) als Platzhalter ein. Das Ausfüllen dieses Felds mit einem Testkonto ist nur erforderlich, wenn Sie Ihre Action tatsächlich zur Veröffentlichung einreichen.
Klicken Sie auf Speichern.
Sie können jetzt mit dem nächsten Abschnitt fortfahren, um App Flip in Ihrer iOS- oder Android-App zu implementieren.
App Flip in Ihre nativen Apps implementieren
Wenn Sie App Flip implementieren möchten, müssen Sie den Nutzerautorisierungscode in Ihrer App so ändern, dass ein Deeplink von Google akzeptiert wird.
App Flip auf Ihrem Gerät testen
Nachdem Sie eine Aktion erstellt und App Flip in der Konsole und in Ihrer App konfiguriert haben, können Sie App Flip auf Ihrem Mobilgerät testen. Sie können die Google Assistant App verwenden, um App Flip zu testen.
So testen Sie App Flip über die Assistant App:
Rufen Sie die Actions Console auf und wählen Sie Ihr Projekt aus.
Klicken Sie oben in der Navigationsleiste auf Test.
So starten Sie den Workflow zur Kontoverknüpfung über die Assistant App:
Klicken Sie auf dem Tab „Assistant“ auf Smart-Home-Steuerung.
Klicken Sie auf Hinzufügen(+).
Wählen Sie Ihre Aktion aus der Liste der Anbieter aus. In der Liste wird das Präfix „[test]“ vorangestellt. Wenn Sie Ihre [Test]-Aktion in der Liste auswählen, sollte Ihre App geöffnet werden.
Prüfen Sie, ob Ihre App gestartet wurde, und beginnen Sie mit dem Test Ihres Autorisierungsablaufs.
[null,null,["Zuletzt aktualisiert: 2025-07-26 (UTC)."],[[["\u003cp\u003eOAuth-based App Flip Linking streamlines account linking between your authentication system and Google accounts, leveraging existing app credentials for a faster user experience.\u003c/p\u003e\n"],["\u003cp\u003eApp Flip is supported on both iOS and Android platforms, requiring you to own an OAuth 2.0 server and adhere to specific design guidelines for the user consent screen.\u003c/p\u003e\n"],["\u003cp\u003eTo enable App Flip, you must configure it within the Actions console after creating an Action and setting up an OAuth 2.0 server.\u003c/p\u003e\n"],["\u003cp\u003eImplementation requires modifying your app's authorization code to handle deep links from Google and can be tested using the Google Assistant app.\u003c/p\u003e\n"]]],[],null,["# Overview\n\nOAuth-based App Flip Linking (App Flip) allows your users to easily and quickly\nlink their accounts in your authentication system to their Google accounts.\nIf your app is installed on your user's phone when they initiate the account\nlinking process, they are seamlessly flipped to your app to obtain user\nauthorization.\n\nThis approach provides a faster and easier linking process since the user does\nnot have to re-enter their username and password to authenticate; instead,\nApp Flip leverages the credentials from the user's account on your app. Once a\nuser has linked their Google account with your app, they can take advantage of\nany integrations that you have developed.\n\nYou can set up App Flip for both iOS and Android apps.\n**Figure 1.** Account linking on a user's phone with App Flip.\n\nRequirements\n------------\n\nTo implement App Flip, you must fulfill the following requirements:\n\n- You must have an Android or iOS app.\n- You must own, manage and maintain an OAuth 2.0 server which supports the OAuth 2.0 authorization code flow.\n\n| **Note:** Confirm that your OAuth2 implementation or provider supports the authorization code flow along with App Flip redirect URLs and client_ids as described in our guides.\n\nFor more information on the OAuth linking authorization code flow, see\n[Implement your OAuth server](/assistant/identity/oauth2?oauth=code#implement_your_oauth_server).\n| **Caution:** For OAuth-based App Flip, you can implement either the [OAuth-based Google Sign-in \"Streamlined\" linking type](/assistant/identity/gsi-oauth-concept-guide) or the [OAuth linking type](/assistant/identity/oauth-concept-guide). Both of these linking types must use the *authorization code flow* for App Flip to work.\n\nDesign guidelines\n-----------------\n\nThis section describes the design requirements and recommendations for the App\nFlip account linking consent screen. After Google calls your app, your app\ndisplays the consent screen to the user.\n\n### Requirements\n\n1. You must communicate that the user's account is being linked to Google, **not** to a specific Google product, such as Google Home or Google Assistant.\n\n### Recommendations\n\nWe recommend that you do the following:\n\n1. **Display Google's Privacy Policy.** Include a link to\n [Google's Privacy Policy](http://policies.google.com)\n on the consent screen.\n\n2. **Data to be shared.** Use clear and concise language to tell the user what\n data of theirs Google requires and why.\n\n3. **Clear call-to-action.** State a clear call-to-action on your consent\n screen, such as \"Agree and link.\" This is because users need to\n understand what data they're required to share with Google to link their\n accounts.\n\n4. **Ability to cancel.** Provide a way for users to go back or cancel, if\n they choose not to link.\n\n5. **Ability to unlink.** Offer a mechanism for users to unlink, such as a\n URL to their account settings on your platform. Alternatively, you can\n include a link to [Google Account](https://myaccount.google.com) where users\n can manage their linked account.\n\n6. **Ability to change user account.** Suggest a method for users to switch\n their account(s). This is especially beneficial if users tend to have\n multiple accounts.\n\n - If a user must close the consent screen to switch accounts, send a recoverable error to Google so the user can sign in to the desired account with *OAuth linking* and the *implicit* flow.\n7. **Include your logo.** Display your company logo on the consent screen.\n Use your style guidelines to place your logo. If you wish\n to also display Google's logo, see\n [Logos and trademarks](https://www.google.com/permissions/logos-trademarks/).\n\n**Figure 2.** Account linking consent screen design guidelines.\n\nSet up for OAuth-based App Flip\n-------------------------------\n\nThe following sections describe the prerequisites for OAuth-based App Flip and how to configure your\nApp Flip project in the Actions console.\n\n### Create\nan Action\nand set up an OAuth 2.0 server\n\nBefore you can configure App Flip, you need to do the following:\n\n- **Create an Action.** To create an Action, follow the instructions in the [Create a project](/assistant/conversational/build/projects?tool=builder#create_a_project) section.\n- **Set up an OAuth 2.0 server.** For more information about setting up an OAuth server, see [Implement OAuth account linking](/assistant/identity/oauth2?oauth=code#implement_oauth_account_linking).\n\n### Configure App Flip in the Actions console\n\nThe following section describes how to configure App Flip in the\n[Actions console](https://console.actions.google.com/).\n**Note:** Choose which type of platform you want to target. The content of this page reloads to adapt to your choice. \nAndroid iOS\n\n1. Click **Develop** in the top navigation. Then, click **Account linking** in the left navigation.\n2. Toggle on the switch next to **Account linking.**\n3. Under **Account creation** , select **No, I only want to\n allow account creation on my website**.\n4. Click **Next**.\n5. Under **Linking type** , select **OAuth** and **Authorization code** from the drop-down menus.\n6. Click **Next**.\n7. Fill out all the fields under **OAuth Client information**. (If App Flip isn't supported, regular OAuth is used as a fallback.)\n8. Click **Next**.\n9. Under **Use your app for account linking (optional)** , check **Enable for iOS**.\n10. Fill out the **Universal Link** field. For more information about universal links, see [Allowing Apps and Websites to Link to your Content](https://developer.apple.com/documentation/uikit/inter-process_communication/allowing_apps_and_websites_to_link_to_your_content).\n11. If you want to optionally configure your client, add scopes and click **Add scope** under **Configure your client (optional).** If not, click **Next.**\n12. Under Testing instructions, type `test` (or any other string) as a placeholder. (Filling in this field with a test account is only necessary if you are actually submitting your Action to be published.)\n13. Click **Save**.\n\n\nYou can now continue to the next section to implement App Flip in your iOS or Android app.\n\nImplement App Flip in your native apps\n--------------------------------------\n\nTo implement App Flip, you need to modify the user authorization code in your\napp to accept a deep link from Google.\n\nTest App Flip on your device\n----------------------------\n\nNow that you've created an Action and configured App Flip on the console and in\nyour app, you can test App Flip on your mobile device. You can use the\nGoogle Assistant app\n\nto test App Flip.\n\nTo test App Flip from the Assistant app, follow these steps:\n\n1. Go to the [Actions console](https://console.actions.google.com/) and select your project.\n2. Click **Test** in the top navigation.\n3. Trigger the account linking flow from the Assistant app:\n 1. Open the [Google Assistant app](https://play.google.com/store/apps/details?id=com.google.android.apps.googleassistant).\n 2. Click **Settings**.\n 3. On the Assistant tab, click **Home Control.**\n 4. Click **Add(+)**.\n 5. Select your Action from the list of providers. It will be prefixed with \"\\[test\\]\" in the list. When you select your \\[test\\] Action from the list, it should open your app.\n 6. Verify that your app was launched and begin testing your authorization flow."]]
