Volley not sending a post request with parameters.

Question

I have the code below (Volley Library By Google) to send a POST request to my php server and get information as a result. I tried the code without checking isset($_POST['id']) in php and the code worked fine. Buy when I started to check, php will skip the if statement and go to else meaning the code is not sending the params correctly. How can I fix this?

RequestQueue queue = Volley.newRequestQueue(Chat.this);
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.POST,
        CHAT_URL_FEED, null,
        new Response.Listener<JSONObject>() {

            @Override
            public void onResponse(JSONObject response) {
                Log.d("THISSSSSSSS", response.toString());
                if (response != null) {
                    parseChatJsonFeed(response);
                }
            }
        }, new Response.ErrorListener(){

    @Override
    public void onErrorResponse(VolleyError error){
        VolleyLog.d("Here", "Error: " + error.getMessage());
    }
}) {

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

};

queue.add(jsonObjReq);

I also tried the following code:

RequestQueue queue = Volley.newRequestQueue(Chat.this);

        JSONObject params = new JSONObject();
        try {
            params.put("id", id);
        } catch (JSONException e) {
            e.printStackTrace();
        }


        JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.POST,
                CHAT_URL_FEED, params,
                new Response.Listener<JSONObject>() {

                    @Override
                    public void onResponse(JSONObject response) {
                        Log.d("THISSSSSSSS", response.toString());
                        if (response != null) {
                            parseChatJsonFeed(response);
                        }
                    }
                }, new Response.ErrorListener() {

            @Override
            public void onErrorResponse(VolleyError error) {
                VolleyLog.d("Here", "Error: " + error.getMessage());
            }
        });

        queue.add(jsonObjReq);

but I still get the same result.

Aerostation

possible duplicate of Google Volley: How to send a POST request with Json data? – Nephoscope

currently volley does not supports POST method for JSON requests. have a look at this and this – Nephoscope

@Max Pain I tried the code without checking isset($_POST['id']) in php and the code worked fine. can you post that, i think $_POST['id'] is null in either cases. – Pert

@Max Pain would you give me a favour and tell me how do you use $_POST in your PHP code to read JsonObjectRequest? because i have seen a lot posts about that and still have a problem. – Pert

here is what I am using to check my code. if(isset($_POST['id']) && !empty($_POST['id']) && $_POST['id'] != null){//mycode here} – Aerostation

@MaxPain you said: and the code worked fine. i just want that code.:-) – Pert

@MaxPain and please start your comment by @mmlooloo because i do not get notified. – Pert

Possible duplicate of Volley - POST/GET parameters – Illyes

Answer 1

After spending some more time looking into this problem, I found out that Volley does not properly work with JSON request with POST requests. User @SMR suggested that in the comment section of my question. I also saw a similar answers on Google groups and the mian repo on git. I ended up using GET requests to pass the information to the server and retrieve a JSON feed.

Aerostation

Hello Max! Thaks for your answer .. what is the alternative to this ??? actually I have a project which has Volley implemented .. but the structure of api's is now being changed by the backend team .. and now I am facing this issue with post request .. please suggest me an alternative to this .. as I don't want to change such a major part of my project .. that would be hell of a burden for me! – Extranuclear

Answer 2

StringRequest postRequest = new StringRequest(Request.Method.POST, CHAT_URL_FEED,
            new Response.Listener<String>()
            {
                @Override
                public void onResponse(String response) {
                    // response
                  Log.d("THISSSSSSSS", response.toString());
            if (response != null) {
                parseChatJsonFeed(response);
            }
            },
            new Response.ErrorListener()
            {
                @Override
                public void onErrorResponse(VolleyError error) {
                    // error
                    VolleyLog.d("Here", "Error: " + error.getMessage());
                }
            }
    ) {
        @Override
        protected Map<String, String> getParams()
        {
          Map<String, String> params = new HashMap<String, String>();
    params.put("id", id);
    return params;
        }
    };

Volley Doesn't Support Parameters when its requesting for JSONObject. you can get response as JSON String and can convert back to JSON using JSONObject class.

Miramontes

Spent one morning on this bug. Volley wants a json to send the request but.... doesn't send that json! Use a POST instead, but IMHO this is a bug. – Present

Answer 3

For sent POST request you can write custom request class that based on JsonRequest class P.S. I use this way in my library (based on Volley)

Pilsudski

Answer 4

You can also send a String request (JSON) as a POST as seen below.

        RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
        String requestStr = "{\n" +
                "\"id\": \"your JSON\"\n" +
                "}\n";

        JsonObjectRequest request = new JsonObjectRequest(Request.Method.POST,"http://<Your url>",
                requestStr,new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {
                //Your Logic on Success
            }
        },new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                //Your Logic on Error
            }
        });

        queue.add(request);

Churchwarden

Answer 5

In spite of sending the request as a StringRequest, use JsonObjectRequest. I'm pretty sure the issue will be gone!

Thank me later :)

Extranuclear

Answer 6

I'm a bit late to answer this, but I think it may help someone facing same problem. I search through all similar questions on SO, relating to PHP and Volley api but I didn't find any satisfying answer.

The problem is that you are sending data from the Volley library as content type

application/json

but your PHP script is expecting POST data as content type

application/x-www-form-urlencoded

In your PHP script, do this:

$_POST = json_decode(file_get_contents('php://input'), true);

if ( !empty($_POST['id']) ) {
    $id = $_POST['id'];
    echo $id;
}

Now if you check for

if( isset($_POST['id']) ){
    echo "something";
}

it should work now

Custer