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.

MessagingKt

public final class MessagingKt

Summary

Public fields
`final @NonNull FirebaseMessaging`	`messaging` Accessing this object for Kotlin apps has changed; see the migration guide.

Public methods
`static final @NonNull RemoteMessage`	`remoteMessage( @NonNull String to, @ExtensionFunctionType @NonNull Function1<@NonNull RemoteMessage.Builder, Unit> init )` This method is deprecated. Migrate to use the KTX API from the main module: https://firebase.google.com/docs/android/kotlin-migration.

Public fields

messaging

public final @NonNull FirebaseMessaging messaging

Accessing this object for Kotlin apps has changed; see the migration guide.

Returns the FirebaseMessaging instance of the default FirebaseApp.

Important: In July 2025, we stopped releasing KTX modules and removed the KTX libraries from the Firebase Android BoM (v34.0.0). If you use KTX APIs from the 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.

Public methods

remoteMessage

public static final @NonNull RemoteMessage remoteMessage(
    @NonNull String to,
    @ExtensionFunctionType @NonNull Function1<@NonNull RemoteMessage.Builder, Unit> init
)

Returns a RemoteMessage instance initialized using the init function.