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public interface HasApiKey<O extends Api.ApiOptions>
Known indirect subclasses
Anything that has an ApiKey.
This is used to allow GoogleApi-based clients to be exposed via interface instead of subclass. Those interfaces can be declared as extending this, and GoogleApi's will automatically fulfill the interface.
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Last updated 2025-03-17 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-17 UTC."],[[["\u003cp\u003e\u003ccode\u003eHasApiKey\u003c/code\u003e is an interface used for objects possessing an API key.\u003c/p\u003e\n"],["\u003cp\u003eIt allows GoogleApi-based clients to be exposed as interfaces instead of subclasses, promoting flexibility in implementation.\u003c/p\u003e\n"],["\u003cp\u003eInterfaces extending \u003ccode\u003eHasApiKey\u003c/code\u003e can be automatically fulfilled by \u003ccode\u003eGoogleApi\u003c/code\u003e instances.\u003c/p\u003e\n"],["\u003cp\u003eThe key purpose is to manage API keys within Google API interactions.\u003c/p\u003e\n"]]],["`HasApiKey` is an interface in both Kotlin and Java. It serves as a marker for objects possessing an `ApiKey`. `GoogleApi`, the base class for Google API entry points, and `ModuleInstallClient`, an interface for module installation APIs, are direct subclasses. This interface enables `GoogleApi`-based clients to be exposed via interfaces instead of subclasses, allowing these interfaces to extend `HasApiKey`, which `GoogleApi` automatically fulfills.\n"],null,["HasApiKey \n[Kotlin](/android/reference/kotlin/com/google/android/gms/common/api/HasApiKey \"View this page in Kotlin\") \\|Java \n\n\n```\npublic interface HasApiKey\u003cO extends Api.ApiOptions\u003e\n```\n\n\u003cbr /\u003e\n\nKnown direct subclasses \n[AuthorizationClient](/android/reference/com/google/android/gms/auth/api/identity/AuthorizationClient), [CredentialSavingClient](/android/reference/com/google/android/gms/auth/api/identity/CredentialSavingClient), [GoogleApi](/android/reference/com/google/android/gms/common/api/GoogleApi), [ModuleInstallClient](/android/reference/com/google/android/gms/common/moduleinstall/ModuleInstallClient), [SignInClient](/android/reference/com/google/android/gms/auth/api/identity/SignInClient) \n\n|--------------------------------------------------------------------------------------------------------------|-----------------------------------------|\n| [AuthorizationClient](/android/reference/com/google/android/gms/auth/api/identity/AuthorizationClient) | A client for the authorization API. |\n| [CredentialSavingClient](/android/reference/com/google/android/gms/auth/api/identity/CredentialSavingClient) | A client for the Credential Saving API. |\n| [GoogleApi](/android/reference/com/google/android/gms/common/api/GoogleApi) | Base class for Google API entry points. |\n| [ModuleInstallClient](/android/reference/com/google/android/gms/common/moduleinstall/ModuleInstallClient) | Interface for module install APIs. |\n| [SignInClient](/android/reference/com/google/android/gms/auth/api/identity/SignInClient) | A client for the sign-in API. |\n\nKnown indirect subclasses \n[GoogleSignInClient](/android/reference/com/google/android/gms/auth/api/signin/GoogleSignInClient) \n\n|----------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| [GoogleSignInClient](/android/reference/com/google/android/gms/auth/api/signin/GoogleSignInClient) | **This class is deprecated.** Use [Credential Manager](https://developer.android.com/training/sign-in/credential-manager) for authentication or [Google Identity Services](https://developers.google.com/identity/sign-in/android/authorize-access) for authorization. \u003cbr /\u003e |\n\n*** ** * ** ***\n\nAnything that has an `ApiKey`.\n\nThis is used to allow [GoogleApi](/android/reference/com/google/android/gms/common/api/GoogleApi)-based clients to be exposed via interface instead of subclass. Those interfaces can be declared as extending this, and [GoogleApi](/android/reference/com/google/android/gms/common/api/GoogleApi)'s will automatically fulfill the interface."]]