Volley GET with parameters

Question

I have a web service which gives data in JSON array format. Right now the data is being fetched just by passing the URL. But now I want to pass a parameter to get the JSON response. This web service has GET & POST methods. I tried with Volley - Sending a POST request using JSONArrayRequest answer, but I couldn't implement it in my code. It would be really helpful if somebody could explain, how to achieve this in my code.

This is how my code looks like

String HTTP_SERVER_URL = "https://192.168.1.7/STUDENTWS/Default.asmx/StudentDataJson?InFacultyID=string";
public void JSON_WEB_CALL(){

    //mSwipeRefreshLayout.setRefreshing(true);

    jsonArrayRequest = new JsonArrayRequest(HTTP_SERVER_URL,



            new Response.Listener<JSONArray>() {
                @Override
                public void onResponse(JSONArray response) {

                    JSON_PARSE_DATA_AFTER_WEBCALL(response);
                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {

                }
            });

    requestQueue = Volley.newRequestQueue(this);

    requestQueue.add(jsonArrayRequest);
}



public void JSON_PARSE_DATA_AFTER_WEBCALL(JSONArray array){

    for(int i = 0; i<array.length(); i++) {

        DataModel GetDataModel = new DataModel();

        JSONObject json = null;
        try {
            json = array.getJSONObject(i);

            GetDataModel.setId(json.getString("STUDENTID"));

            GetDataModel.setPlateNo(json.getString("GRADE"));

            GetDataModel.setPlateCode(json.getString("HOUSE"));


        }
        catch (JSONException e)
        {

            e.printStackTrace();
        }

        DataAdapterClassList.add(GetDataModel);
        mSwipeRefreshLayout.setRefreshing(false);

    }

    recyclerViewadapter = new NewRecyclerViewAdapter(DataAdapterClassList, this);

    recyclerView.setAdapter(recyclerViewadapter);

    if (array.length()!=0) {
        SHOW_ALERT(array);
        sendNotification(recyclerView, array);
    }
}

See if [this](https://stackoverflow.com/questions/33014210/how-to-post-request-parameters-when-using-jsonarrayrequest-in-volley) helps you. — Sandeep Singh, Feb 19 '18 at 10:43

score 2 · Answer 1 · edited Aug 09 '20 at 08:30

For get with params you should create StringRequest. For example:

RequestQueue queue = Volley.newRequestQueue(context);

StringRequest sr = new StringRequest(Request.Method.GET, "http://headers.jsontest.com/",
  new Response.Listener<String>() {
    @Override
    public void onResponse(String response) {
      Log.e("HttpClient", "success! response: " + response.toString());
    }
  },
  new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
      Log.e("HttpClient", "error: " + error.toString());
    }
  })
  {
    @Override
    protected Map<String,String> getParams(){
      Map<String,String> params = new HashMap<String, String>();
      params.put("user","YOUR USERNAME");
      params.put("pass","YOUR PASSWORD");
      return params;
    }
    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
      Map<String,String> params = new HashMap<String, String>();
      params.put("Content-Type","application/x-www-form-urlencoded");
      return params;
    }
  };

for JSONArray or JSONobject you can create JsonObjectRequest — Rohit kumar, Feb 21 '18 at 09:49
if you want your request should start with '[' tag then use JsonArrayRequest — Rohit kumar, Feb 22 '18 at 08:31

score 1 · Answer 2 · answered Feb 21 '18 at 09:56

// for json object
Map<String, String> jsonParams = new HashMap<String, String>();
        jsonParams.put("fullname",fullName);
        jsonParams.put("email",email);
        jsonParams.put("password",password);

// for json array make any list.List will be converted to jsonArray
//     example-----
//     ArrayList<String> jsonParams =new ArrayList();
//     jsonParams.add("Test1")
//     jsonParams.add("Test2")

      JsonObjectRequest objectRequest=new JsonObjectRequest(Request.Method.POST, url, new JSONObject(jsonParams), new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {


            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Log.e(TAG, "onErrorResponse: ",error );
                Toast.makeText(ActivitySignUp.this,error.getMessage(), Toast.LENGTH_LONG).show();

            }
        }){
            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                HashMap<String,String> header=new HashMap<String, String>();
                header.put("Content-Type","application/json");
                return header;
            }
        };

The question was about requesting for GET request. This is an example sending POST request. — Himanshu, Mar 12 '20 at 09:16

yuzuriha · Answer 3 · 2018-02-20T05:41:40.023

If you want to pass a param to your server, then you might wanna do a POST method, else.. if you only wanted to get the data, then GET method is the best way... there's also header that you can use to pass data, but, I wouldn't recommend to use header for sending params... that's a sore eyes

Edit

//Set you method POST or GET

JsonObjectRequest(Request.Method.GET(/*here can set to POST too*/), url, null,
    new Response.Listener<JSONObject>() 
    {
        @Override
        public void onResponse(JSONObject response) {   
                        // display response     
            Log.d("Response", response.toString());
        }
    }, 
    new Response.ErrorListener() 
    {
         @Override
         public void onErrorResponse(VolleyError error) {            
            Log.d("Error.Response", response);
       }
    }
);

I think in your codes you missed out Request.Method – yuzuriha Feb 20 '18 at 05:38 — yuzuriha, Feb 20 '18 at 05:38

Volley GET with parameters

3 Answers3