java – Volley – Sending a POST request using JSONArrayRequest-ThrowExceptions

Exception or error:

I’m using Volley to interact with an API. I need to send a post request (with parameters) to a service that returns a JSON Array.

JsonObjectRequest has a constructor that takes a method and a set of parameters

JsonObjectRequest(int method, java.lang.String url, JSONObject jsonRequest, Response.Listener<JSONObject> listener, Response.ErrorListener errorListener) 

However JSONArrayRequest (the one I need) only has one constructor of the form

JsonArrayRequest(java.lang.String url, Response.Listener<JSONArray> listener, Response.ErrorListener errorListener) 

How can I make this send a POST request with data?

How to solve:

They’re probably going to add it later, but in the meanwhile you can add the wanted constructor yourself:

public JsonArrayRequest(int method, String url, JSONObject jsonRequest,
        Listener<JSONArray> listener, ErrorListener errorListener) {
    super(method, url, (jsonRequest == null) ? null : jsonRequest.toString(), 
        listener, errorListener);
}

This isn’t tested, though I see no reason this shouldn’t work since the implementation details are in the super class: JsonRequest.

Try it and see if it works.

EDIT:

I called it! It took them almost two years after I answered this but the Volley team added this constructor on March 19, 2015 to the repo. Guess what? This is the EXACT syntax.

###

I was lazy and did not build the Volley library myself (just used the .jar), hence have no source code…so in the anonymous new JSONArrayRequest I added these functions:

            // NO CONSTRUCTOR AVAILABLE FOR POST AND PARAMS FOR JSONARRAY!
            // overridden the necessary functions for this
            @Override
            public byte[] getBody() {
                try {
                    return paramsArray.toString().getBytes("utf-8");
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
                return null;
            }

            @Override
            public int getMethod() {
                return Method.POST;
            }

###

This code will make what you want

    Volley.newRequestQueue(context).add(
            new JsonRequest<JSONArray>(Request.Method.POST, "url/", null,
                    new Response.Listener<JSONArray>() {
                        @Override
                        public void onResponse(JSONArray response) {

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

                        }
                    }) {
                @Override
                protected Map<String, String> getParams() {
                    Map<String, String> params = new HashMap<String, String>();
                    params.put("param1", "one");
                    params.put("param2", "two");
                    return params;
                }

                @Override
                protected Response<JSONArray> parseNetworkResponse(
                        NetworkResponse response) {
                    try {
                        String jsonString = new String(response.data,
                                HttpHeaderParser
                                        .parseCharset(response.headers));
                        return Response.success(new JSONArray(jsonString),
                                HttpHeaderParser
                                        .parseCacheHeaders(response));
                    } catch (UnsupportedEncodingException e) {
                        return Response.error(new ParseError(e));
                    } catch (JSONException je) {
                        return Response.error(new ParseError(je));
                    }
                }
            });

###

The best and easy way to send parameter request and return custom response according to parameter using JSONarray Request is to add get paramater value in the URL itself.

String URL ="http://mentormentee.gear.host/android_api/Message.aspx?key="+keyvalue;

where keyvalue parameter value and add this URL in the JsonArrayRequest URL simple.

    JsonArrayRequest searchMsg= new JsonArrayRequest(URL, new Response.Listener<JSONArray>() {

        @Override
        public void onResponse(JSONArray response) {
            Log.d(TAG, response.toString());


            // Parsing json
            for (int i = 0; i < response.length(); i++) {
                try {

                    JSONObject obj = response.getJSONObject(i);
                    Message msg = new Message();
                    msg.setMessageThread(obj.getString("msgThread"));
                    msg.setUserName(obj.getString("Username"));
                    msg.setDate(obj.getString("msgDate"));

                    // adding movie to movies array
                    MessageList.add(msg);

                } catch (JSONException e) {
                    e.printStackTrace();
                }

            }

            // notifying list adapter about data changes
            // so that it renders the list view with updated data
            adapter.notifyDataSetChanged();
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            VolleyLog.d(TAG, "Error: " + error.getMessage());
           // hidePDialog();

        }
    });
    // Adding request to request queue
    AppController.getInstance().addToRequestQueue(searchMsg);
}

###

May be your problem is solved but I hope this will be helpful for other users. What I did was, I created a new custom class by extending it.. here is the code.

public class CustomJsonRequest extends Request {

Map<String, String> params;       
private Response.Listener listener; 

public CustomJsonRequest(int requestMethod, String url, Map<String, String> params,
                      Response.Listener responseListener, Response.ErrorListener errorListener) {

    super(requestMethod, url, errorListener);
    this.params = params;
    this.listener = responseListener;
}

@Override
protected void deliverResponse(Object response) {
    listener.onResponse(response); 

}

@Override
public Map<String, String> getParams() throws AuthFailureError {
         return params;
}

@Override
protected Response parseNetworkResponse(NetworkResponse response) {
    try {
        String jsonString = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
        return Response.success(new JSONObject(jsonString),
        HttpHeaderParser.parseCacheHeaders(response));
    } catch (UnsupportedEncodingException e) {
        return Response.error(new ParseError(e));
    } catch (JSONException je) {
        return Response.error(new ParseError(je));
    }
}

}

you can use this class instead of JsonArrayRequest or JSonObjectRequest. And this also solve the problem of php not being able to catch post parameter in $_POST

###

You can use this 

package HelperClass;
/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */



import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.toolbox.HttpHeaderParser;
import com.android.volley.toolbox.JsonRequest;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.UnsupportedEncodingException;
import java.util.Map;

/**
 * A request for retrieving a {@link JSONArray} response body at a given URL.enter code here
 */
public class MyjsonPostRequest extends JsonRequest<JSONArray> {

    protected static final String PROTOCOL_CHARSET = "utf-8";



    /**
     * Creates a new request.
     * @param method the HTTP method to use
     * @param url URL to fetch the JSON from
     * @param requestBody A {@link String} to post with the request. Null is allowed and
     *   indicates no parameters will be posted along with request.
     * @param listener Listener to receive the JSON response
     * @param errorListener Error listener, or null to ignore errors.
     */
    public MyjsonPostRequest(int method, String url, String requestBody,
                            Listener<JSONArray> listener, ErrorListener errorListener) {
        super(method, url, requestBody, listener,
                errorListener);
    }

    /**
     * Creates a new request.
     * @param url URL to fetch the JSON from
     * @param listener Listener to receive the JSON response
     * @param errorListener Error listener, or null to ignore errors.
     */
    public MyjsonPostRequest(String url, Listener<JSONArray> listener, ErrorListener errorListener) {
        super(Method.GET, url, null, listener, errorListener);
    }

    /**
     * Creates a new request.
     * @param method the HTTP method to use
     * @param url URL to fetch the JSON from
     * @param listener Listener to receive the JSON response
     * @param errorListener Error listener, or null to ignore errors.
     */
    public MyjsonPostRequest(int method, String url, Listener<JSONArray> listener, ErrorListener errorListener) {
        super(method, url, null, listener, errorListener);
    }

    /**
     * Creates a new request.
     * @param method the HTTP method to use
     * @param url URL to fetch the JSON from
     * @param jsonRequest A {@link JSONArray} to post with the request. Null is allowed and
     *   indicates no parameters will be posted along with request.
     * @param listener Listener to receive the JSON response
     * @param errorListener Error listener, or null to ignore errors.
     */
    public MyjsonPostRequest(int method, String url, JSONArray jsonRequest,
                            Listener<JSONArray> listener, ErrorListener errorListener) {
        super(method, url, (jsonRequest == null) ? null : jsonRequest.toString(), listener,
                errorListener);
    }

    /**
     * Creates a new request.
     * @param method the HTTP method to use
     * @param url URL to fetch the JSON from
     * @param jsonRequest A {@link JSONObject} to post with the request. Null is allowed and
     *   indicates no parameters will be posted along with request.
     * @param listener Listener to receive the JSON response
     * @param errorListener Error listener, or null to ignore errors.
     */
    public MyjsonPostRequest(int method, String url, JSONObject jsonRequest,
                            Listener<JSONArray> listener, ErrorListener errorListener) {
        super(method, url, (jsonRequest == null) ? null : jsonRequest.toString(), listener,
                errorListener);
    }

    /**
     * Constructor which defaults to <code>GET</code> if <code>jsonRequest</code> is
     * <code>null</code>, <code>POST</code> otherwise.
     *
     * @see #MyjsonPostRequest(int, String, JSONArray, Listener, ErrorListener)
     */
    public MyjsonPostRequest(String url, JSONArray jsonRequest, Listener<JSONArray> listener,
                            ErrorListener errorListener) {
        this(jsonRequest == null ? Method.GET : Method.POST, url, jsonRequest,
                listener, errorListener);
    }

    /**
     * Constructor which defaults to <code>GET</code> if <code>jsonRequest</code> is
     * <code>null</code>, <code>POST</code> otherwise.
     *
     * @see #MyjsonPostRequest(int, String, JSONObject, Listener, ErrorListener)
     */
    public MyjsonPostRequest(String url, JSONObject jsonRequest, Listener<JSONArray> listener,
                            ErrorListener errorListener) {
        this(jsonRequest == null ? Method.GET : Method.POST, url, jsonRequest,
                listener, errorListener);
    }

    @Override
    protected Response<JSONArray> parseNetworkResponse(NetworkResponse response) {
        try {
            String jsonString = new String(response.data,
                    HttpHeaderParser.parseCharset(response.headers));
            return Response.success(new JSONArray(jsonString),
                    HttpHeaderParser.parseCacheHeaders(response));
        } catch (UnsupportedEncodingException e) {
            return Response.error(new ParseError(e));
        } catch (JSONException je) {
            return Response.error(new ParseError(je));
        }
    }

}

###

just add some details about JsonArrayRequest.
in \src\com\android\volley\toolbox,you can find out that default construct of JsonArrayRequest not support Method parameter, and volley add method(GET) in the construct,
so if u want to use other method, try write it yourself

public class JsonArrayRequest extends JsonRequest<JSONArray> {

    /**
     * Creates a new request.
     * @param url URL to fetch the JSON from
     * @param listener Listener to receive the JSON response
     * @param errorListener Error listener, or null to ignore errors.
     */
    public JsonArrayRequest(String url, Listener<JSONArray> listener, ErrorListener errorListener) {
        super(Method.GET, url, null, listener, errorListener);
    }

###

List<Map<String,String>> listMap =  new ArrayList<Map<String, String>>();
        Map<String,String> map  = new HashMap<String,String>();
        try {

            map.put("email", customer.getEmail());
            map.put("password",customer.getPassword());

        } catch (Exception e) {
            e.printStackTrace();
        }
        listMap.add(map);

        String url = PersonalConstants.BASE_URL+"/url";
        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(
                Request.Method.POST, url, String.valueOf(new JSONArray(listMap)),
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject jsonObject) {
                        Log.d(App.TAG, jsonObject.toString());
                    }
                }, new Response.ErrorListener (){

            @Override
            public void onErrorResponse(VolleyError volleyError) {
                Log.d(App.TAG,volleyError.toString());
            }
        }
        );
        App.getInstance().getmRequestQueue().add(jsonObjectRequest);

###

JsonArrayRequest req = new JsonArrayRequest(urlJsonArry,
                new Response.Listener<JSONArray>() {
                    @Override
                    public void onResponse(JSONArray response) {
                        Log.d(TAG, response.toString());

                        try {
                            // Parsing json array response
                            // loop through each json object
                            jsonResponse = "";
                            for (int i = 0; i < response.length(); i++) {

                                JSONObject person = (JSONObject) response
                                        .get(i);

                                String name = person.getString("name");
                                String email = person.getString("email");
                                JSONObject phone = person
                                        .getJSONObject("phone");
                                String home = phone.getString("home");
                                String mobile = phone.getString("mobile");

                                jsonResponse += "Name: " + name + "\n\n";
                                jsonResponse += "Email: " + email + "\n\n";
                                jsonResponse += "Home: " + home + "\n\n";
                                jsonResponse += "Mobile: " + mobile + "\n\n\n";

                            }

                            txtResponse.setText(jsonResponse);

                        } catch (JSONException e) {
                            e.printStackTrace();
                            Toast.makeText(getApplicationContext(),
                                    "Error: " + e.getMessage(),
                                    Toast.LENGTH_LONG).show();
                        }

                        hidepDialog();
                    }
                }, new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        VolleyLog.d(TAG, "Error: " + error.getMessage());
                        Toast.makeText(getApplicationContext(),
                                error.getMessage(), Toast.LENGTH_SHORT).show();
                        hidepDialog();
                    }
                });

        // Adding request to request queue
        AppController.getInstance().addToRequestQueue(req);

}

Leave a Reply

Your email address will not be published. Required fields are marked *