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.

FirebaseKt

public final class FirebaseKt

Summary

Public fields
`final @NonNull FirebaseApp`	`app` Returns the default firebase app instance.
`final @NonNull FirebaseOptions`	`options` Returns options of default FirebaseApp

Public methods
`static final @NonNull FirebaseApp`	`FirebaseKt.app(@NonNull Firebase receiver, @NonNull String name)` Returns a named firebase app instance.
`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

app

public final @NonNull FirebaseApp app

Returns the default firebase app instance.

options

public final @NonNull FirebaseOptions options

Returns options of default FirebaseApp

Public methods

FirebaseKt.app

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

Returns a named firebase app instance.

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.