How to get ArrayList from JSONObject request

Question

How to get the ArrayList from JSONObject request?

I tried interface but it doesn't work. Setter and Getter doesn't work too. I am using a RecyclerView.

This is my code,

public class EditDoctor extends Fragment {
 RecyclerView recyclerView;
 String key;
 String url;
 RecyclerAdapterEditDoctor edit;
 SharedPreferences sharedPreferences;
 RequestQueue queue;
 ArrayList<EditDoctorModel> listOfPojo = new ArrayList<>();
 public EditDoctor()
 {
 }
 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstaneState)
 {
 View view = inflater.inflate(R.layout.editdoctor,container,false);
 Context context = getActivity();
 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
 key = sharedPreferences.getString("key", "");
 return view;
 }
 @Override
 public void onViewCreated(View view,Bundle savedInstanceState) {
 setRetainInstance(true);
 }
 @Override
 public void onActivityCreated(@Nullable Bundle savedInstanceState) {
 super.onActivityCreated(savedInstanceState);
 recyclerView = (RecyclerView) getActivity().findViewById(R.id.recycler1);
 LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity());
 linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
 recyclerView.setLayoutManager(linearLayoutManager);
 queue = Volley.newRequestQueue(getActivity());
 sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
 key = sharedPreferences.getString("key", "");
 url = "http://192.168.0.153:9091/drrate/api/profile/Search?page=1&size=10&filter=[{\"col\":\"MemberKey\",\"val\":\""+key+"\",\"cond\":\"Equal\"}]";
 getJSONRequest();
 edit = new RecyclerAdapterEditDoctor(getActivity(),listOfPojo);
 recyclerView.setAdapter(edit);
 }
 // This is the Request 
 public void getJSONRequest() {
 JsonObjectRequest req = new JsonObjectRequest(Request.Method.GET, url,
 new Response.Listener<JSONObject>() {
 @Override
 public void onResponse(JSONObject response) {
 ArrayList<EditDoctorModel>temp = new ArrayList<>();
 try {
 JSONArray Jarray = response.getJSONArray("Data");
 for (int i = 0; i < Jarray.length(); i++) {
 JSONObject object = Jarray.getJSONObject(i);
 EditDoctorModel editDoctorModel = new EditDoctorModel();
 editDoctorModel.setFullName(object.getString("Name"));
 editDoctorModel.setProfession(object.getString("Profession"));
 editDoctorModel.setUrl(object.getString("Image"));
 temp.add(editDoctorModel);
 }
 // this work but android monitor says that skipping layout adapter not attached
 // edit = new RecyclerAdapterEditDoctor(getActivity(),listOfPojo);
 // recyclerView.setAdapter(edit);
 } catch (JSONException e) {
 e.printStackTrace();
 }
 }
 }, new Response.ErrorListener() {
 @Override
 public void onErrorResponse(VolleyError error) {
 }
 });
 queue.add(req);
}

Please help me. Thanks in advance.

• Alexandre Cartapanis: Please read stackoverflow.com/help/how-to-ask. Show us what you already tried and what is not working.
• sydney69: I just need to get the the array list which is the temp
• Neerajlal K: Show your JSON too.
• M.Yogeshwaran: Show your JSON then we can help
• sydney69: guys you mean json model? public class EditDoctorModel { String fullName; String profession; String url; public String getFullName() { return fullName; } public void setFullName(String fullName) { this.fullName = fullName; } public String getProfession() { return profession; } public void setProfession(String profession) { this.profession = profession; } public String getUrl() { return url; } public void setUrl(String url) { this.url = url; } }

Answer 1

Making some chages in your code

public class EditDoctor extends Fragment {
 RecyclerView recyclerView;
 String key;
 String url;
 RecyclerAdapterEditDoctor edit;
 SharedPreferences sharedPreferences;
 RequestQueue queue;
 ArrayList<EditDoctorModel> listOfPojo;
 public EditDoctor()
 {
 }
 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstaneState)
 {
 View view = inflater.inflate(R.layout.editdoctor,container,false);
 Context context = getActivity();
 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
 key = sharedPreferences.getString("key", "");
 return view;
 }
 @Override
 public void onViewCreated(View view,Bundle savedInstanceState) {
 setRetainInstance(true);
 }
 @Override
 public void onActivityCreated(@Nullable Bundle savedInstanceState) {
 super.onActivityCreated(savedInstanceState);
 recyclerView = (RecyclerView) getActivity().findViewById(R.id.recycler1);
 LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity());
 linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
 recyclerView.setLayoutManager(linearLayoutManager);
 queue = Volley.newRequestQueue(getActivity());
 sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
 key = sharedPreferences.getString("key", "");
 url = "http://192.168.0.153:9091/drrate/api/profile/Search?page=1&size=10&filter=[{\"col\":\"MemberKey\",\"val\":\""+key+"\",\"cond\":\"Equal\"}]";
 getJSONRequest();
 edit = new RecyclerAdapterEditDoctor(getActivity(),listOfPojo);
 recyclerView.setAdapter(edit);
 }
 // This is the Request 
 public void getJSONRequest() {
 JsonObjectRequest req = new JsonObjectRequest(Request.Method.GET, url,
 new Response.Listener<JSONObject>() {
 @Override
 public void onResponse(JSONObject response) {
 listOfPojo = new ArrayList<>();
 try {
 JSONArray Jarray = response.getJSONArray("Data");
 for (int i = 0; i < Jarray.length(); i++) {
 JSONObject object = Jarray.getJSONObject(i);
 EditDoctorModel editDoctorModel = new EditDoctorModel();
 editDoctorModel.setFullName(object.getString("Name"));
 editDoctorModel.setProfession(object.getString("Profession"));
 editDoctorModel.setUrl(object.getString("Image"));
 listOfPojo.add(editDoctorModel);
 }
 // this work but android monitor says that skipping layout adapter not attached
 // edit = new RecyclerAdapterEditDoctor(getActivity(),listOfPojo);
 // recyclerView.setAdapter(edit);
 edit.updateRecyler(listOfPojo);
 } catch (JSONException e) {
 e.printStackTrace();
 }
 }
 }, new Response.ErrorListener() {
 @Override
 public void onErrorResponse(VolleyError error) {
 }
 });
 queue.add(req);
}

//Add below method in your adapter

public void updateRecyler(ArrayList<EditDoctorModel> list){
this.your_adapterModel_list=list;
notifyDatasetChanged();
}

Whenever Volley gets response your recyler autmatically update.

Answer 2

Add the data you have parsed to the dataset listOfPojo, and call notifyDataSetChanged on the adapter.

Try this,

@Override
public void onResponse(JSONObject response) {
 ArrayList<EditDoctorModel> temp = new ArrayList<>();
 try {
 JSONArray Jarray = response.getJSONArray("Data");
 for (int i = 0; i < Jarray.length(); i++) {
 JSONObject object = Jarray.getJSONObject(i);
 EditDoctorModel editDoctorModel = new EditDoctorModel();
 editDoctorModel.setFullName(object.getString("Name"));
 editDoctorModel.setProfession(object.getString("Profession"));
 editDoctorModel.setUrl(object.getString("Image"));
 temp.add(editDoctorModel);
 }
 // add the data in temp to listOfPojo
 listOfPojo.clear();
 listOfPojo.addAll(temp);
 // notify the adapter that the data has changed
 edit.notifyDataSetChanged();
 } catch (JSONException e) {
 e.printStackTrace();
 }
}

• sydney69: this doesnt work my problem is that when i add listofPojo.add(temp); then add this listOfPojo.addAll(temp); also this edit.notifyDataSetChanged(); in recycler none is showing the problem is that data get lost when thread of jsonobjectrequest is done
• Neerajlal K: @sydney69 Its addAll and not add.
• Neerajlal K: Happy coding. Good luck :)