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

Question

In my Android client I receive this JSON data from a backend:

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


        

Answer 1

If you change readProductLevels to emit each list item one at a time, you can then react to them one at a time:

In mProductService:

private Observable> readProductLevels() {
        return Observable.create(
                new Observable.OnSubscribe>() {
                    @Override
                    public void call(Subscriber> subscriber) {
                        List> items = new ArrayList>();
                        List list1 = new ArrayList() {{
                            add(1D);
                            add(2D);
                        }};
                        items.add(list1);
                        List list2 = new ArrayList() {{
                            add(10D);
                            add(12D);
                        }};
                        items.add(list2);
                        List list3 = new ArrayList() {{
                            add(21D);
                            add(22D);
                        }};
                        items.add(list3);

                       // Imagine the list creation above is your Json parsing


                        for (List list : items) {
                            subscriber.onNext(list);
                        }

                        subscriber.onCompleted();
                    }
                });
    }

Allows you to subscribe to each item in your super list:

private void getProductLevels() {
        Observable> responseObservable = readProductLevels();
        AppObservable.bindFragment(this, responseObservable)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                        // TODO: Transform List> into List
                .subscribe(
                        new Subscriber>() {
                            @Override
                            public void onCompleted() {
                            }

                            @Override
                            public void onError(Throwable e) {
                            }

                            @Override
                            public void onNext(List response) {
                                new ProductLevel(response.get(0), response.get(1));
                            }
                        });

    }