补救措施

本页介绍了如何处理完整性判定方面的问题。

请求完整性令牌时，您可以选择向用户显示 Google Play 对话框。当存在一个或多个完整性判定方面的问题时，您可以显示该对话框。该对话框会显示在应用之上，并提示用户解决造成问题的原因。关闭该对话框后，您可以向 Integrity API 发出另一个请求以验证问题是否已解决。

注意：无论完整性令牌的内容为何，所有类型的完整性对话框都可以向用户显示。您应检查服务器上完整性令牌的内容，以确定应显示哪一种类型的对话框。

完整性对话框

GET_LICENSED（类型代码 1）

判定问题

如果 appLicensingVerdict == "UNLICENSED"，这意味着用户账号未获得许可。也就是说，用户未从 Google Play 安装或购买应用。

补救措施

您可以显示 GET_LICENSED 对话框，提示用户从 Google Play 获取您的应用。如果用户选择接受，该用户账号便会获得许可 (appLicensingVerdict == "LICENSED")。系统会将应用添加到用户的 Google Play 库，Google Play 就可以代表您交付应用更新。

用户体验示例

CLOSE_UNKNOWN_ACCESS_RISK（类型代码 2）

判定问题

如果 environmentDetails.appAccessRiskVerdict.appsDetected 包含 "UNKNOWN_CAPTURING" 或 "UNKNOWN_CONTROLLING"，则表示设备上有可能会截屏或控制设备的未知应用在运行。

补救措施

您可以显示 CLOSE_UNKNOWN_ACCESS_RISK 对话框，提示用户关闭所有可能在截屏或控制设备的未知应用。如果用户点按 Close all 按钮，系统会关闭所有此类应用。

用户体验示例

CLOSE_ALL_ACCESS_RISK（类型代码 3）

判定问题

如果 environmentDetails.appAccessRiskVerdict.appsDetected 包含 "KNOWN_CAPTURING"、"KNOWN_CONTROLLING"、"UNKNOWN_CAPTURING" 或 "UNKNOWN_CONTROLLING" 中的任何一个，则表示设备上有正在运行的应用可能会截屏或控制设备。

补救措施

您可以显示 CLOSE_ALL_ACCESS_RISK 对话框，提示用户关闭所有可能在截屏或控制设备的应用。如果用户点按 Close all 按钮，设备上的所有此类应用都会关闭。

用户体验示例

请求完整性对话框

当客户端请求完整性令牌时，您可以使用 StandardIntegrityToken（标准 API）和 IntegrityTokenResponse（传统 API）中提供的方法：showDialog(Activity activity, int integrityDialogTypeCode)。

注意：如需使用完整性对话框，您使用的 Integrity API 的 Android 库版本必须为 1.3.0 或更高版本。Unity 插件尚不支持此功能。

以下步骤列出了使用 Play Integrity API 显示 GET_LICENSED 对话框的方法：

1. 从您的应用请求完整性令牌，并将该令牌发送到您的服务器。您可以使用标准请求或传统请求。

   Kotlin

   // Request an integrity token
   val tokenResponse: StandardIntegrityToken = requestIntegrityToken()
   // Send token to app server and get response on what to do next
   val yourServerResponse: YourServerResponse = sendToServer(tokenResponse.token())  

   Java

   // Request an integrity token
   StandardIntegrityToken tokenResponse = requestIntegrityToken();
   // Send token to app server and get response on what to do next
   YourServerResponse yourServerResponse = sendToServer(tokenResponse.token());  

   Unity

   // Request an integrity token
   StandardIntegrityToken tokenResponse = RequestIntegrityToken();
   // Send token to app server and get response on what to do next
   YourServerResponse yourServerResponse = sendToServer(tokenResponse.Token); 

   原生

   /// Request an integrity token
   StandardIntegrityToken* response = requestIntegrityToken();
   /// Send token to app server and get response on what to do next
   YourServerResponse yourServerResponse = sendToServer(StandardIntegrityToken_getToken(response));

2. 在您的服务器上，解密完整性令牌并检查 appLicensingVerdict 字段。结果可能如下所示：

   // Licensing issue
   {
     ...
     accountDetails: {
         appLicensingVerdict: "UNLICENSED"
     }
   }

3. 如果令牌包含 appLicensingVerdict: "UNLICENSED"，则回复您的应用客户端，请求其显示许可对话框：

   Kotlin

   private fun getDialogTypeCode(integrityToken: String): Int{
     // Get licensing verdict from decrypted and verified integritytoken
     val licensingVerdict: String = getLicensingVerdictFromDecryptedToken(integrityToken)
   
     return if (licensingVerdict == "UNLICENSED") {
             1 // GET_LICENSED
         } else 0
   }

   Java

   private int getDialogTypeCode(String integrityToken) {
     // Get licensing verdict from decrypted and verified integrityToken
     String licensingVerdict = getLicensingVerdictFromDecryptedToken(integrityToken);
   
     if (licensingVerdict.equals("UNLICENSED")) {
       return 1; // GET_LICENSED
     }
     return 0;
   }

   Unity

   private int GetDialogTypeCode(string IntegrityToken) {
     // Get licensing verdict from decrypted and verified integrityToken
     string licensingVerdict = GetLicensingVerdictFromDecryptedToken(IntegrityToken);
   
     if (licensingVerdict == "UNLICENSED") {
       return 1; // GET_LICENSED
     }
     return 0;
   } 

   原生

   private int getDialogTypeCode(string integrity_token) {
     /// Get licensing verdict from decrypted and verified integrityToken
     string licensing_verdict = getLicensingVerdictFromDecryptedToken(integrity_token);
   
     if (licensing_verdict == "UNLICENSED") {
       return 1; // GET_LICENSED
     }
     return 0;
   }

4. 在应用中，使用从服务器检索到的请求的代码调用 showDialog：

   Kotlin

   // Show dialog as indicated by the server
   val showDialogType: Int? = yourServerResponse.integrityDialogTypeCode()
   if (showDialogType != null) {
     // Call showDialog with type code, the dialog will be shown on top of the
     // provided activity and complete when the dialog is closed.
     val integrityDialogResponseCode: Task<Int> =
     tokenResponse.showDialog(activity, showDialogType)
     // Handle response code, call the Integrity API again to confirm that
     // verdicts have been resolved.
   } 

   Java

   // Show dialog as indicated by the server
   @Nullable Integer showDialogType = yourServerResponse.integrityDialogTypeCode();
   if (showDialogType != null) {
     // Call showDialog with type code, the dialog will be shown on top of the
     // provided activity and complete when the dialog is closed.
     Task<Integer> integrityDialogResponseCode =
         tokenResponse.showDialog(activity, showDialogType);
     // Handle response code, call the Integrity API again to confirm that
     // verdicts have been resolved.
   }

   Unity

   IEnumerator ShowDialogCoroutine() {
     int showDialogType = yourServerResponse.IntegrityDialogTypeCode();
   
     // Call showDialog with type code, the dialog will be shown on top of the
     // provided activity and complete when the dialog is closed.
     var showDialogTask = tokenResponse.ShowDialog(showDialogType);
   
     // Wait for PlayAsyncOperation to complete.
     yield return showDialogTask;
   
     // Handle response code, call the Integrity API again to confirm that
     // verdicts have been resolved.
   } 

   原生

   // Show dialog as indicated by the server
   int show_dialog_type = yourServerResponse.integrityDialogTypeCode();
   if (show_dialog_type != 0) {
     /// Call showDialog with type code, the dialog will be shown on top of the
     /// provided activity and complete when the dialog is closed.
     StandardIntegrityErrorCode error_code =
         IntegrityTokenResponse_showDialog(response, activity, show_dialog_type);
   
     /// Proceed to polling iff error_code == STANDARD_INTEGRITY_NO_ERROR
     if (error_code != STANDARD_INTEGRITY_NO_ERROR)
     {
         /// Remember to call the *_destroy() functions.
         return;
     }
   
     /// Use polling to wait for the async operation to complete.
     /// Note, the polling shouldn't block the thread where the IntegrityManager
     /// is running.
   
     IntegrityDialogResponseCode* response_code;
     error_code = StandardIntegrityToken_getDialogResponseCode(response, response_code);
   
     if (error_code != STANDARD_INTEGRITY_NO_ERROR)
     {
         /// Remember to call the *_destroy() functions.
         return;
     }
   
     /// Handle response code, call the Integrity API again to confirm that
     /// verdicts have been resolved.
   }

5. 对话框会显示在提供的 activity 之上。用户关闭对话框后，使用响应代码完成 Task。

6. （可选）请求另一个令牌以显示任何其他对话框。如果您发出的是标准请求，则需要再次预热令牌提供程序以获取新的判定结果。