android - How to transform a nested list of double values into a Java class using RxJava? -

in android client receive json data backend:

[     [         1427378400000,         553     ],     [         1427382000000,         553     ] ] 

here routine loads data. using rxandroid , retrofit here.

private void getproductlevels() {     observable<list<list<double>>> responseobservable =         mproductservice.readproductlevels();     appobservable.bindfragment(this, responseobservable)         .subscribeon(schedulers.io())         .observeon(androidschedulers.mainthread())         // todo: transform list<list<double>> list<productlevel>         .subscribe(new subscriber<list<list<double>>>() {             @override             public void oncompleted() {}              @override             public void onerror(throwable e) {}              @override             public void onnext(list<list<double>> response) {}         });  } 

how can map inner list<double> specific java class such productlevel using rxjava operators?

public class productlevel {      public double mtimestamp;     public double mlevel;      public productlevel(double timestamp, double level) {         mtimestamp = timestamp;         mlevel = level;     }  } 

finally, receive this: list<productlevel>.

according data, receive list of pair (timestamp, level). pair represented list contains 2 values.

so want emit each pair, , transform each pair productlevel.

to this, you'll have flatmap list of pair emit each pair. map each pair productlevel. finally, build list emited items.

(java8 style)

appobservable.bindfragment(this, responseobservable)              .subscribeon(schedulers.io())              .observeon(androidschedulers.mainthread())              .flatmapiterable(listoflist -> listoflist) // or flatmap(l -> observable.from(l))              .map(pair -> new productlevel(pair.get(0),pair.get(1))) // build productlevel each pair              .tolist() // build list productlevel              .subscribe(listofproductlevel -> /** ... **/);