rxJava, Refresh api data periodically

问题

I am using the following observable to call retrofit api then save the response into cache file:

@Override public Observable<StoryCollectionEntity> storyEntityList(final int page) {

       return this.restApi.storyCollection(id, page)
       .doOnNext(saveStoryCollectionToCacheAction)         
   .onErrorResumeNext(CloudNewsDataStore.this.mNewsCache.getStories(page));
            }

This works as expected. my question is: how can i make this observer returns api response periodically?

let's say, user wants to refresh the data every 5 minutes

回答1:

The interval() operator will emit an item at a given time interval.

You can use this to trigger periodic events like so:

Observable.interval(5, TimeUnit.MINUTES)
            .flatMap(count -> this.restApi.storeCollection(id, page))
            // etc.

来源：https://stackoverflow.com/questions/34276498/rxjava-refresh-api-data-periodically