IMPORTANT: In July 2025, we stopped releasing new versions of KTX modules, and we removed the KTX libraries from the Firebase Android BoM (v34.0.0). If you use KTX APIs from the previously released KTX modules, we recommend that you migrate your app to use KTX APIs from the main modules instead. For details, see the FAQ about this initiative.

Firebase

public static class Firebase

Single access point to all firebase SDKs from Kotlin.

Acts as a target for extension methods provided by sdks.

Summary

Public fields
`static @NonNull Firebase`	`INSTANCE`

Extension functions
`static final @NonNull FirebaseApp`	`FirebaseKt.app(@NonNull Firebase receiver, @NonNull String name)` Returns a named firebase app instance.
`static final @NonNull FirebaseApp`	`FirebaseKt.getApp(@NonNull Firebase receiver)`
`static final @NonNull FirebaseOptions`	`FirebaseKt.getOptions(@NonNull Firebase receiver)`
`static final FirebaseApp`	`FirebaseKt.initialize( @NonNull Firebase receiver, @NonNull Context context )` Initializes and returns a FirebaseApp.
`static final @NonNull FirebaseApp`	`FirebaseKt.initialize( @NonNull Firebase receiver, @NonNull Context context, @NonNull FirebaseOptions options )` Initializes and returns a FirebaseApp.
`static final @NonNull FirebaseApp`	`FirebaseKt.initialize( @NonNull Firebase receiver, @NonNull Context context, @NonNull FirebaseOptions options, @NonNull String name )` Initializes and returns a FirebaseApp.

Public fields

INSTANCE

public static @NonNull Firebase INSTANCE

Extension functions

FirebaseKt.app

public static final @NonNull FirebaseApp FirebaseKt.app(@NonNull Firebase receiver, @NonNull String name)

Returns a named firebase app instance.

FirebaseKt.getApp

public static final @NonNull FirebaseApp FirebaseKt.getApp(@NonNull Firebase receiver)

FirebaseKt.getOptions

public static final @NonNull FirebaseOptions FirebaseKt.getOptions(@NonNull Firebase receiver)

FirebaseKt.initialize

public static final FirebaseApp FirebaseKt.initialize(
    @NonNull Firebase receiver,
    @NonNull Context context
)

Initializes and returns a FirebaseApp.

FirebaseKt.initialize

public static final @NonNull FirebaseApp FirebaseKt.initialize(
    @NonNull Firebase receiver,
    @NonNull Context context,
    @NonNull FirebaseOptions options
)

Initializes and returns a FirebaseApp.

FirebaseKt.initialize

public static final @NonNull FirebaseApp FirebaseKt.initialize(
    @NonNull Firebase receiver,
    @NonNull Context context,
    @NonNull FirebaseOptions options,
    @NonNull String name
)

Initializes and returns a FirebaseApp.