JSON Parsing GET method, trying to display values in Spinner

I am trying to display values in Spinner by using JSON parsing, but it's not taking the centerID and giving me error as " centerID not found". And, nothing is displaying in Spinner View.

// This is my API file

BASE_URL : http://192.168.1.80/aoplnew/api/ API URL : BASE_URL/users/getdoctorslist/$center_id METHOD : GET PARAMETER TO PASS: center_id=4 INPUT: BASE_URL/users/getdoctorslist/4 OUTPUT: "status": true, "result": [ "doctor_id": "1", "first_name": "Dr. Sagar", "last_name": "Patil" , "doctor_id": "2", "first_name": "Dr. Ashwini", "last_name": "D" ], "message": "Get Doctors list successfully!" Errors: 1) "status": false, "message": "Center id should not empty!" 2) "status": false, "message": "There is no Center data found!"

This is the config file where I am doing Connection

public class Config //JSON URL public static final String DATA_URL = "http://192.168.1.80/aoplnew/api/users/getdoctorslist/center_id"; //Tags used in the JSON String public static final String TAG_DOC_ID = "doctor_id"; public static final String TAG_FIRST_NAME = "first_name"; public static final String TAG_LAST_NAME = "last_name"; //JSON array name public static final String JSON_ARRAY = "result";

This is my fragment where I am trying to fetch the values in Spinner using Volley library

private ArrayList<String> docList; //JSON Array private JSONArray result; private Spinner doctorLists; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) // Inflate the layout for this fragment View view = inflater.inflate(R.layout.fragment_add_patient, container, false); doctorLists = (Spinner) view.findViewById(R.id.doctors_list); //Initializing the ArrayList docList = new ArrayList<String>(); //This method will fetch the data from the URL getData(); return view; // closing onCreateView() private void getData() //Creating a string request StringRequest stringRequest = new StringRequest(Request.Method.GET,Config.DATA_URL, new Response.Listener<String>() @Override public void onResponse(String response) JSONObject j = null; try //Parsing the fetched Json String to JSON Object j = new JSONObject(response); //Storing the Array of JSON String to our JSON Array result = j.getJSONArray(Config.JSON_ARRAY); //Calling method getStudents to get the students from the JSON Array getDoctors(result); catch (JSONException e) e.printStackTrace(); , new Response.ErrorListener() @Override public void onErrorResponse(VolleyError error) ); //Creating a request queue RequestQueue requestQueue = Volley.newRequestQueue(getActivity()); //Adding request to the queue requestQueue.add(stringRequest); private void getDoctors(JSONArray j) //Traversing through all the items in the json array for(int i=0;i<j.length();i++) try //Getting json object JSONObject json = j.getJSONObject(i); //Adding the name of the student to array list docList.add(json.getString(Config.TAG_FIRST_NAME)); catch (JSONException e) e.printStackTrace(); //Setting adapter to show the items in the spinner doctorLists.setAdapter(new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_dropdown_item, docList));

4 Answers
4

you are missing request method

use this

your Api need to pass center_id as parameter when its called

StringRequest stringRequest = new StringRequest(Request.Method.GET,Config.DATA_URL, new Response.Listener<String>() @Override public void onResponse(String response) JSONObject j = null; try //Parsing the fetched Json String to JSON Object j = new JSONObject(response); //Storing the Array of JSON String to our JSON Array result = j.getJSONArray(Config.JSON_ARRAY); //Calling method getStudents to get the students from the JSON Array getDoctors(result); catch (JSONException e) e.printStackTrace(); , new Response.ErrorListener() @Override public void onErrorResponse(VolleyError error) ) @Override public Map<String, String> getHeaders() throws AuthFailureError Map<String, String> params = new HashMap<String, String>(); params.put("Content-Type", "application/json"); params.put("center_id", "4"); return params; ; //Creating a request queue RequestQueue requestQueue = Volley.newRequestQueue(getActivity()); //Adding request to the queue requestQueue.add(stringRequest);

if still it is not work let me know

i have made the changes,but still nothing is displaying in Spinner

– Shruti B
Sep 13 '18 at 9:18

i have edited my answer,try it.You are not passing "center_id" parameter when api called.

– pratik vekariya
Sep 13 '18 at 9:25

Or you can also try " Config.DATA_URL+YOUR CENTER_ID" in StringRequest

– pratik vekariya
Sep 13 '18 at 9:44

@Override // here im getting error public Map<String, String> getHeaders() throws AuthFailureError // at throws im getting one more error Map<String, String> params = new HashMap<String, String>(); params.put("Content-Type", "application/json"); params.put("center_id", "4"); return params; ;

– Shruti B
Sep 13 '18 at 9:51

have you checked your api url in postman? if you checked in postman then in postman you are getting correct respons?

– pratik vekariya
Sep 13 '18 at 10:25

StringRequest stringRequest = new StringRequest(Config.DATA_URL,...

You're not setting the center_id argument in your request

center_id

I'm not good at English.

I recommend use GSON for convert json string to object:
https://github.com/google/gson

and recommend use retrofit for connect to service:
https://square.github.io/retrofit/

Already you have information about your API.

API URL : BASE_URL/users/getdoctorslist/$center_id METHOD : GET PARAMETER TO PASS: center_id=4 INPUT: BASE_URL/users/getdoctorslist/4

Your API need a value $center_id but you didn't pass the value. You requested url is

$center_id

"http://192.168.1.80/aoplnew/api/users/getdoctorslist/center_id"

Please send a value of center_id.

Try this

final String url = "http://192.168.1.80/aoplnew/api/users/getdoctorslist/4"; // prepare the Request JsonObjectRequest getRequest = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() @Override public void onResponse(JSONObject response) try //Parsing the fetched JSON String to JSON Object j = new JSONObject(response); //Storing the Array of JSON String to our JSON Array result = j.getJSONArray(Config.JSON_ARRAY); //Calling method getStudents to get the students from the JSON Array getDoctors(result); catch (JSONException e) e.printStackTrace(); , new Response.ErrorListener() @Override public void onErrorResponse(VolleyError error) Log.d("Error.Response", response); ); // add it to the RequestQueue RequestQueue requestQueue = Volley.newRequestQueue(getActivity());

//Adding request to the queue
requestQueue.add(stringRequest);

@ShrutiB please check my updated answer.

– Faysal Ahmed
Sep 13 '18 at 10:17

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