rxjava: Can I use retry() but with delay?

Question

I am using rxjava in my Android app to handle network requests asynchronously. Now I would like to retry a failed network request only after a certain time has passed.

Answer 1

Based on kjones answer here is Kotlin version of RxJava 2.x retry with a delay as an extension. Replace Observable to create the same extension for Flowable.

fun  Observable.retryWithDelay(maxRetries: Int, retryDelayMillis: Int): Observable {
    var retryCount = 0

    return retryWhen { thObservable ->
        thObservable.flatMap { throwable ->
            if (++retryCount < maxRetries) {
                Observable.timer(retryDelayMillis.toLong(), TimeUnit.MILLISECONDS)
            } else {
                Observable.error(throwable)
            }
        }
    }
}

Then just use it on observable observable.retryWithDelay(3, 1000)