core-ktx/androidx.core.util/asConsumer

asConsumer

fun <T> Continuation<T>.asConsumer(): Consumer<T>(source)

Returns a java.util.function.Consumer that will resume this Continuation when the result of an operation is accepted.

Useful for writing suspend bindings to async methods that accept java.util.function.Consumer as a result callback for a one-time operation:

public suspend fun FancinessManager.query(
    query: FancinessManager.Query
): FancinessManager.QueryResult = suspendCancellableCoroutine<QueryResult> { continuation ->

    // Any Android API that supports cancellation should be configured to propagate
    // coroutine cancellation as follows:
    val canceller = CancellationSignal()
    continuation.invokeOnCancellation { canceller.cancel() }

    // Invoke the FancinessManager#queryAsync method as follows:
    queryAsync(
        query,
        canceller,
        // Use a direct executor to avoid extra dispatch. Resuming the continuation will
        // handle getting to the right thread or pool via the ContinuationInterceptor.
        Runnable::run,
        continuation.asConsumer()
    )
}