Google Volley ignores POST-Parameter

Question

I'm currently trying to send a simple POST-request via Google Volley to my server. Therefore I've written the following lines of code:

Map<String, String> params = new HashMap<String, String>();
params.put("regId", "skdjasjdaljdlksajskl");
JSONObject object = new JSONObject(params);
JsonObjectRequest request = new JsonObjectRequest(Method.POST,
                "address_of_my_server/method", object,
                successListener, errorListener);
queue.add(request);

But I get an Error 500 returned, which says, that there is a missing parameter (regId). I've tried the same with a GET-Request, but I got the same result.

Only when I'm using a StringRequest with a formatted URL like "address_of_my_server/method?regId=sadlasjdlasdklsj" the server replies with 200.

I get the exact same result when I use a StringRequest like:

StringRequest request = new StringRequest(Method.POST,
                "myurl", successListener,
                errorListener){
            @Override
            protected Map<String, String> getParams()
                    throws AuthFailureError {
               Map<String, String> params = new HashMap<String, String>();
               params.put("regId", "skdjasjdaljdlksajskl");
               return params;
            }
        };

Why is Volley ignoring my parameters?

Answer 1

I had same issue last week, but it is fixed now. Your server accepts the Content-Type as form-data, when sending volley's JsonObjectRequest the request's content-type will be application/json so whole params will be sent as one json body, not as key value pairs as in Stringrequest. Change the server code to get request params from http request body instead of getting it from keys(like $_REQUEST['name'] in php).

Answer 2

Use this helper class:

import java.io.UnsupportedEncodingException;
import java.util.Map;    
import org.json.JSONException;
import org.json.JSONObject;    
import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.toolbox.HttpHeaderParser;

public class CustomRequest extends Request<JSONObject> {

private Listener<JSONObject> listener;
private Map<String, String> params;

public CustomRequest(String url, Map<String, String> params,
        Listener<JSONObject> reponseListener, ErrorListener errorListener) {
    super(Method.GET, url, errorListener);
    this.listener = reponseListener;
    this.params = params;
}

public CustomRequest(int method, String url, Map<String, String> params,
        Listener<JSONObject> reponseListener, ErrorListener errorListener) {
    super(method, url, errorListener);
    this.listener = reponseListener;
    this.params = params;
}

protected Map<String, String> getParams()
        throws com.android.volley.AuthFailureError {
    return params;
};

@Override
protected Response<JSONObject> 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));
    }
}

@Override
protected void deliverResponse(JSONObject response) {
    // TODO Auto-generated method stub
    listener.onResponse(response);
    }
}