Error Android Cardview and Recycler with Volley

Question

I have some code to parse JSON data to cardview and recycler with Volley. I want to show json data into my Fragment. I\'m getting error but I don\'t know what is causing it. Any

Answer 1

You can refer my following sample code. I have tested.

public class RecycleCardActivityFragment extends Fragment {

    private final List<Person> mPersonList = new ArrayList<>();

    public RecycleCardActivityFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_recycle_card, container, false);

        Context context = getActivity();

        RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.recycleView);
        recyclerView.setHasFixedSize(true);

        LinearLayoutManager layoutManager = new LinearLayoutManager(context);
        recyclerView.setLayoutManager(layoutManager);

        final RVAdapter rvAdapter = new RVAdapter(mPersonList);
        recyclerView.setAdapter(rvAdapter);

        RequestQueue requestQueue = Volley.newRequestQueue(context);
        String url = "http://192.16.1.100/api/persons";

        JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
            @Override
            public void onResponse(JSONArray response) {
                try {
                    if (response.length() > 0) {
                        mPersonList.clear();
                        for (int i = 0; i < response.length(); i++) {
                            JSONObject jsonObject = response.getJSONObject(i);
                            Person person = new Person();
                            if (!jsonObject.isNull("name")) {
                                person.name = jsonObject.getString("name");
                            }
                            if (!jsonObject.isNull("age")) {
                                person.age = jsonObject.getInt("age");
                            }
                            mPersonList.add(i, person);
                        }
                        rvAdapter.notifyDataSetChanged();
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Log.e("VOLLEY", error.toString());
            }
        });

        requestQueue.add(jsonArrayRequest);

        return view;
    }
}

About the Person class and RVAdapter class, please take a look at my answer at the following question

How to load data(json) into recycler view using volley

Hope this helps!