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 youmigrate your app to use KTX APIs from the main modules instead. For details, see theFAQ about this initiative.
EventListener
public interfaceEventListener<T>
An interface for event listeners.
Summary
Public methods | |
|---|---|
abstract void | onEvent(@Nullable T value, @NullableFirebaseFirestoreException error)
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Public methods
onEvent
abstract void onEvent(@Nullable T value, @NullableFirebaseFirestoreException error)
onEvent will be called with the new value or the error if an error occurred. It's guaranteed that exactly one of value or error will be non-null.
| Parameters | |
|---|---|
@Nullable T value | The value of the event. |
@NullableFirebaseFirestoreException error | The error if there was error. |
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Last updated 2025-07-21 UTC.