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.

com.google.firebase.remoteconfig

Interfaces

`ConfigUpdateListener`	Event listener interface for real-time Remote Config updates.
`ConfigUpdateListenerRegistration`	Listener registration returned by `addOnConfigUpdateListener`.
`FirebaseRemoteConfigInfo`	Wraps the current state of the `FirebaseRemoteConfig` singleton object.
`FirebaseRemoteConfigValue`	Wrapper for a Remote Config parameter value, with methods to get it as different types.

Classes

`ConfigUpdate`	Information about the updated config passed to `onUpdate`.
`CustomSignals`	A container type to represent key/value pairs of heterogeneous types to be set as custom signals in `setCustomSignals`.
`CustomSignals.Builder`	Builder for constructing `CustomSignals` instances.
`FirebaseRemoteConfig`	Entry point for the Firebase Remote Config API.
`FirebaseRemoteConfigSettings`	Wraps the settings for `FirebaseRemoteConfig` operations.
`FirebaseRemoteConfigSettings.Builder`	Builder for a `FirebaseRemoteConfigSettings`.

Exceptions

`FirebaseRemoteConfigClientException`	A Firebase Remote Config internal issue that isn't caused by an interaction with the Firebase Remote Config server.
`FirebaseRemoteConfigException`	Base class for `FirebaseRemoteConfig` exceptions.
`FirebaseRemoteConfigFetchThrottledException`	An exception thrown when a `fetch` call is throttled.
`FirebaseRemoteConfigServerException`	A Firebase Remote Config internal issue caused by an interaction with the Firebase Remote Config server.

Enums

FirebaseRemoteConfigException.Code

Top-level functions summary

`CustomSignals`	`customSignals(builder: CustomSignals.Builder.() -> Unit)`
`FirebaseRemoteConfigSettings`	`remoteConfigSettings(init: FirebaseRemoteConfigSettings.Builder.() -> Unit)`

Extension functions summary

`operator FirebaseRemoteConfigValue`	`FirebaseRemoteConfig.get(key: String)` See FirebaseRemoteConfig#getValue
`FirebaseRemoteConfig`	`Firebase.remoteConfig(app: FirebaseApp)` Returns the `FirebaseRemoteConfig` instance of a given `FirebaseApp`.

Extension properties summary

`Flow<ConfigUpdate>`	`FirebaseRemoteConfig.configUpdates` Starts listening for config updates from the Remote Config backend and emits `ConfigUpdate`s via a `Flow`.
`FirebaseRemoteConfig`	`Firebase.remoteConfig` Returns the `FirebaseRemoteConfig` instance of the default `FirebaseApp`.

Top-level functions

customSignals

fun customSignals(builder: CustomSignals.Builder.() -> Unit): CustomSignals

remoteConfigSettings

fun remoteConfigSettings(init: FirebaseRemoteConfigSettings.Builder.() -> Unit): FirebaseRemoteConfigSettings

Extension functions

get

operator fun FirebaseRemoteConfig.get(key: String): FirebaseRemoteConfigValue

See FirebaseRemoteConfig#getValue

remoteConfig

fun Firebase.remoteConfig(app: FirebaseApp): FirebaseRemoteConfig

Returns the FirebaseRemoteConfig instance of a given FirebaseApp.

Extension properties

configUpdates

val FirebaseRemoteConfig.configUpdates: Flow<ConfigUpdate>

Starts listening for config updates from the Remote Config backend and emits ConfigUpdates via a Flow. See FirebaseRemoteConfig.addOnConfigUpdateListener for more information.

When the returned flow starts being collected, an ConfigUpdateListener will be attached.
When the flow completes, the listener will be removed. If there are no attached listeners, the connection to the Remote Config backend will be closed.

remoteConfig

val Firebase.remoteConfig: FirebaseRemoteConfig

Returns the FirebaseRemoteConfig instance of the default FirebaseApp.