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.

DatabaseKt

public final class DatabaseKt

Summary

Public fields
`final @NonNull Flow<@NonNull ChildEvent>`	`childEvents` Starts listening to this query's child events and emits its values via a `Flow`.
`final @NonNull FirebaseDatabase`	`database` Returns the `FirebaseDatabase` instance of the default `FirebaseApp`.
`final @NonNull Flow<@NonNull DataSnapshot>`	`snapshots` Starts listening to this query and emits its values via a `Flow`.

Public methods
`static final @NonNull FirebaseDatabase`	`DatabaseKt.database(@NonNull Firebase receiver, @NonNull FirebaseApp app)` Returns the `FirebaseDatabase` instance of the given `FirebaseApp`.
`static final @NonNull FirebaseDatabase`	`DatabaseKt.database(@NonNull Firebase receiver, @NonNull String url)` Returns the `FirebaseDatabase` instance for the specified `url`.
`static final @NonNull FirebaseDatabase`	`DatabaseKt.database( @NonNull Firebase receiver, @NonNull FirebaseApp app, @NonNull String url )` Returns the `FirebaseDatabase` instance of the given `FirebaseApp` and `url`.
`static final T`	`<T extends Object> DatabaseKt.getValue(@NonNull DataSnapshot receiver)` Returns the content of the DataSnapshot converted to a POJO.
`static final T`	`<T extends Object> DatabaseKt.getValue(@NonNull MutableData receiver)` Returns the content of the MutableData converted to a POJO.
`static final @NonNull Flow<T>`	`<T extends Object> DatabaseKt.values(@NonNull Query receiver)` Starts listening to this query and emits its values converted to a POJO via a `Flow`.

Public fields

childEvents

public final @NonNull Flow<@NonNull ChildEvent> childEvents

Starts listening to this query's child events and emits its values via a Flow.

When the returned flow starts being collected, a ChildEventListener will be attached.
When the flow completes, the listener will be removed.

database

public final @NonNull FirebaseDatabase database

Returns the FirebaseDatabase instance of the default FirebaseApp.

snapshots

public final @NonNull Flow<@NonNull DataSnapshot> snapshots

Starts listening to this query and emits its values via a Flow.

When the returned flow starts being collected, a ValueEventListener will be attached.
When the flow completes, the listener will be removed.

Public methods

DatabaseKt.database

public static final @NonNull FirebaseDatabase DatabaseKt.database(@NonNull Firebase receiver, @NonNull FirebaseApp app)

Returns the FirebaseDatabase instance of the given FirebaseApp.

DatabaseKt.database

public static final @NonNull FirebaseDatabase DatabaseKt.database(@NonNull Firebase receiver, @NonNull String url)

Returns the FirebaseDatabase instance for the specified url.

DatabaseKt.database

public static final @NonNull FirebaseDatabase DatabaseKt.database(
    @NonNull Firebase receiver,
    @NonNull FirebaseApp app,
    @NonNull String url
)

Returns the FirebaseDatabase instance of the given FirebaseApp and url.

DatabaseKt.getValue

public static final T <T extends Object> DatabaseKt.getValue(@NonNull DataSnapshot receiver)

Returns the content of the DataSnapshot converted to a POJO.

Supports generics like List<> or Map<>. Use @JvmSuppressWildcards to force the compiler to use the type T, and not ? extends T.

DatabaseKt.getValue

public static final T <T extends Object> DatabaseKt.getValue(@NonNull MutableData receiver)

Returns the content of the MutableData converted to a POJO.

Supports generics like List<> or Map<>. Use @JvmSuppressWildcards to force the compiler to use the type T, and not ? extends T.

DatabaseKt.values

public static final @NonNull Flow<T> <T extends Object> DatabaseKt.values(@NonNull Query receiver)

Starts listening to this query and emits its values converted to a POJO via a Flow.

When the returned flow starts being collected, a ValueEventListener will be attached.
When the flow completes, the listener will be removed.