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

For Kotlin & RxJava1 version

class RetryWithDelay(private val MAX_RETRIES: Int, private val DELAY_DURATION_IN_SECONDS: Long)
    : Function1, Observable<*>> {

    private val START_RETRY: Int = 1

    override fun invoke(observable: Observable): Observable<*> {
        return observable.delay(DELAY_DURATION_IN_SECONDS, TimeUnit.SECONDS)
            .zipWith(Observable.range(START_RETRY, MAX_RETRIES),
                object : Function2 {
                    override fun invoke(throwable: Throwable, attempt: Int): Int {
                        return attempt
                    }
                })
    }
}