如果您的 API 密钥未启用或您在限制 API 密钥时出错（例如，您使用了错误的证书或哈希值），您就可能会收到此错误。请参阅启用 API。
日志中显示“No parameters: no fidelity parameters”警告和“java.lang.NoSuchFieldError”
TuningFork:FPDownload: No parameters: no fidelity parameters
TuningFork: java.lang.NoSuchFieldError: no "[Landroid/content/pm/ApplicationInfo;" field "applicationInfo" in class "Landroid/content/pm/PackageInfo;" or its superclasses
TuningFork: Could not get fidelity params from server : err = 4
[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["没有我需要的信息","missingTheInformationINeed","thumb-down"],["太复杂/步骤太多","tooComplicatedTooManySteps","thumb-down"],["内容需要更新","outOfDate","thumb-down"],["翻译问题","translationIssue","thumb-down"],["示例/代码问题","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-08-26。"],[],[],null,["This topic contains information on how to diagnose and fix common errors. It is\ndivided into sections based on error codes or log messages.\n\nResponse code 400 \n\n Connecting to: https://performanceparameters.googleapis.com/v1/applications/...\n TuningFork:Web: Response code: 400\n TuningFork:Web: Response message: Bad\n\nYou can get this error if your API key is invalid. See\n[Enable the API](/games/sdk/performance-tuner/custom-engine/enable-api).\n\nResponse code 403 \n\n TuningFork:Web: Connecting to: https://performanceparameters.googleapis.com/v1/applications/...:generateTuningParameters\n TuningFork:Web: Response code: 403\n TuningFork:Web: Response message: Forbidden\n\nYou can get this error if your API key is not enabled or you made an error when\nrestricting the API key (for example, you used the wrong certificate or hash\nvalue). See\n[Enable the API](/games/sdk/performance-tuner/custom-engine/enable-api).\n\n\"No parameters: no fidelity parameters\" warning and \"java.lang.NoSuchFieldError\" shown in logs \n\n TuningFork:FPDownload: No parameters: no fidelity parameters\n TuningFork: java.lang.NoSuchFieldError: no \"[Landroid/content/pm/ApplicationInfo;\" field \"applicationInfo\" in class \"Landroid/content/pm/PackageInfo;\" or its superclasses\n TuningFork: Could not get fidelity params from server : err = 4\n\nThese are harmless warnings emitted by the Tuning Fork library when\nchecking to see if the app has the debuggable flag set. While verbose, they are\nharmless and are not indicative of a problem in the integration of the library.\n**You can ignore these warnings**."]]
