android - Convert AsyncTask to RxAndroid -

i have following method post response ui using otto , asynctask.

private static void ongetlateststorycollectionsuccess(final storycollection storycollection, final bus bus) {     new asynctask<void, void, void>() {         @override         protected void doinbackground(void... params) {             bus.post(new lateststorycollectionresponse(storycollection));             return null;         }     }.execute(); } 

i need convert asynctask rxjava using rxandroid library.

don't use .create() use .defer()

observable<file> observable = observable.defer(new func0<observable<file>>() {   @override public observable<file> call() {      file file = downloadfile();      return observable.just(file);   } }); 

to know more details see https://speakerdeck.com/dlew/common-rxjava-mistakes