rxjava - how to add Timer to observerable after creation - timer

Question

I would like to catch an observable thats loading an add and have it show after a few seconds. Im calling this is multiple places but in one particular place i'd like it to only run after a few seconds have elapsed. Here is the method i have that returns an observable:
private Observable fullScreenAdObservable(){
// Create the interstitial.
return Observable.create(new Observable.OnSubscribe<Object>() {
#Override
public void call(Subscriber<? super Object> subscriber) {
interstitial = new InterstitialAd(main.this);
interstitial.setAdUnitId(admob_publisherID);
// Create ad request.
AdRequest adRequest = new AdRequest.Builder().build();
// Begin loading your interstitial.
interstitial.loadAd(adRequest);
interstitial.setAdListener(new AdListener() {
#Override
public void onAdLoaded() {
super.onAdLoaded();
interstitial.show();
}
});
}
});
}
then to subscribe i do this but the timer one fails:
fullScreenAdObservable().subscribe();//this works
fullScreenAdObservable().timer(0,3, TimeUnit.SECONDS).subscribe(); //this fails to react,why ?
I want the timer to run the observerable after 3 seconds but it wont, why ?

Answer 1

There seems to be some scheduling issue when using delay and timer. So i had to explicity tell what thread i want to subscribe on BEFORE calling the delaySubscription or timer. Also modified the subscriber to listen for onNext so i can pass the subscriber a ad. Then i actually showed the ad in the onNext (as its triggered after the delay is elapsed.
private Observable fullScreenAdObservable(){
// Create the interstitial.
return Observable.create(new Observable.OnSubscribe<Object>() {
#Override
public void call(final Subscriber<? super Object> subscriber) {
interstitial = new InterstitialAd(main.this);
interstitial.setAdUnitId(admob_publisherID);
// Create ad request.
AdRequest adRequest = new AdRequest.Builder().build();
// Begin loading your interstitial.
interstitial.loadAd(adRequest);
interstitial.setAdListener(new AdListener() {
#Override
public void onAdLoaded() {
super.onAdLoaded();
//emit a loaded ad
subscriber.onNext(interstitial);
}
});
}
});
}
//and to call it :
fullScreenAdObservable().subscribeOn(AndroidSchedulers.mainThread()).
delaySubscription(13, TimeUnit.SECONDS).subscribe(new Action1<InterstitialAd>() {
#Override
public void call(InterstitialAd ad) {
ad.show();
}
});