Loading using Ion Library returning null JsonObject result

Question

I had built an Android app a few months back, in which one fragment was used to display news using News API. Recently, when I ran the app again, the following error is occurring.
Error

I am attaching the code snippet where the error is occurring.

Ion.with(getActivity()).load("GET",urltemp).asJsonObject().setCallback(new FutureCallback<JsonObject>() {
                @Override
                public void onCompleted(Exception e, JsonObject result) {

                    Log.d(TAG, "enter ");
                    String status = result.get("status").getAsString();
                    if (status.equals("ok")) {

                        JsonArray array = result.get("articles").getAsJsonArray();

                        for (int i = 0; i < array.size(); i++) {
                            JsonObject object = array.get(i).getAsJsonObject();

                            String author = object.get("author").toString();

                            String title = object.get("title").toString();
                            title = title.substring(1, title.length() - 1);

                            String url = object.get("url").toString();
                            url = url.substring(1, url.length() - 1);

                            String urlToImage = object.get("urlToImage").toString();
                            urlToImage = urlToImage.substring(1, urlToImage.length() - 1);

                            String date = object.get("publishedAt").toString();
                            String content = object.get("content").toString();
                            content = content.substring(1, content.length() - 1);

                            items.add(new ModelItems(title, author, date, urlToImage, url));
                        }

                        adapter = new SlideshowViewModel(getActivity(), items);
                        recyclerView.setAdapter(adapter);

                        LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
                        recyclerView.setLayoutManager(layoutManager);
                        Log.d(TAG, "success");
                    } else {
                        Log.e(TAG, "error");
                    }
                }
            });

Now, I thought there could be two possible sources of error, either it is a problem with URL(urltemp variable) or it is with Ion library. Now, I pasted the URL in the browser, it is working fine. So, I guess the problem is with Ion. The JsonObject result is null always. Tried different things, but can't figure out any solution.

I have never used Postman. So, I am not aware of how to post API response. I am attaching how i assigned URL.

urltemp

A thing I tried is pasting the above URL in the browser. When I paste the URL in browser, I get the following response:

It showing null cause your application isn't receiving a JSON String , CHeck where you connect to the server, And log that message if it's 200 then it's connecting else there's something wrong and your application isn't connecting to the server — Swapnil Padaya, Dec 30 '20 at 10:41

score 0 · Answer 1 · answered Dec 30 '20 at 10:42

0

Seems like String status = result.get("status").getAsString(); is being returned null from your server. can you post a API response from postman

answered Dec 30 '20 at 10:42

Kush Singh

157
3
11

how about try logging the json result before enter tag – Kush Singh Dec 30 '20 at 12:51
Log.d("result",result) – Kush Singh Dec 30 '20 at 12:54
I tried Log.d("results", result.toString()) as writing only result showed error: Required String argument, provided JsonObject argument. But on writing result.toString(), same error occurs (Attempt to invoke virtual method toString() on null object reference". – kushagra kumar Dec 30 '20 at 13:01
I tried a different url from another API in load() method which didn't require api-key. It worked fine. – kushagra kumar Dec 30 '20 at 13:03
So now we know that your result is empty – Kush Singh Dec 30 '20 at 13:03
I would suggest you place a debug point and run your app in debug mode – Kush Singh Dec 30 '20 at 13:09

Loading using Ion Library returning null JsonObject result

1 Answers1