How to upload file using Volley library in android?

I already have a sub class of Request<JSONObject> that is used for http post to the server. The problem is, I have no idea on how can I add a parameter for a file. Posting string to the server is easy. but I need to add file as a different parameter. How can I do it?

public class AddNewPetRequest extends Request<JSONObject> {

    private Response.Listener<JSONObject> listener;

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

    public AddNewPetRequest(int method, String url, Map<String, String> params,
                                Response.Listener<JSONObject> reponseListener, Response.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);
    }
}

UPDATE QUESTION: I followed the pattern of one of the answers here in stackoverflow and I came up with this implementation:

public class MultipartRequest extends Request<String> {

private MultipartEntity entity = new MultipartEntity();

private final Response.Listener<String> mListener;
private HashMap<String, String> mParams;


public MultipartRequest(String url, Response.ErrorListener errorListener, Response.Listener<String> listener)
{
    super(Method.POST, url, errorListener);
    mListener = listener;

    buildMultipartEntity();
}

private void buildMultipartEntity()
{
    entity.addPart("profile_picture", new FileBody(new File("/storage/emulated/0/Pictures/VSCOCam/2015-07-31 11.55.14 1.jpg")));
    try
    {
        entity.addPart("user_id", new StringBody("15"));
        entity.addPart("name", new StringBody("Bogs"));
        entity.addPart("gender", new StringBody("Male"));
        entity.addPart("date_birth", new StringBody("1999-12-5"));
        entity.addPart("breed", new StringBody("monkey"));
    }
    catch (UnsupportedEncodingException e)
    {
        VolleyLog.e("UnsupportedEncodingException");
    }
}

@Override
public String getBodyContentType()
{
    return entity.getContentType().getValue();
}

@Override
public byte[] getBody() throws AuthFailureError
{
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    try
    {
        entity.writeTo(bos);
    }
    catch (IOException e)
    {
        VolleyLog.e("IOException writing to ByteArrayOutputStream");
    }
    return bos.toByteArray();
}

@Override
protected Response<String> parseNetworkResponse(NetworkResponse response)
{
    return Response.success("Uploaded", getCacheEntry());
}

@Override
protected void deliverResponse(String response)
{
    mListener.onResponse(response);
   
}

When I add this request to my request queue, it responded with a com.android.volley.TimeoutError but if a check the data base, the request executes and add items to the table but the profile picture upload has only 1 byte of size. another problem, my database item added twice.

public int uploadFile(String sourceFileUri, String fileName) { String upLoadServerUri = "your_api_url"; HttpURLConnection conn = null; DataOutputStream dos = null; String lineEnd = "\r\n"; String twoHyphens = "--"; String boundary = "*****"; int bytesRead, bytesAvailable, bufferSize; byte[] buffer; int maxBufferSize = 1 * 1024 * 1024; File sourceFile = new File(sourceFileUri); //errMsg=Environment.getExternalStorageDirectory().getAbsolutePath(); if (!sourceFile.isFile()) { Log.e("uploadFile", "Source File Does not exist"); return 0; } try { // open a URL connection to the Servlet FileInputStream fileInputStream = new FileInputStream(sourceFile); URL url = new URL(upLoadServerUri); conn = (HttpURLConnection) url.openConnection(); // Open a HTTP connection to the URL conn.setDoInput(true); // Allow Inputs conn.setDoOutput(true); // Allow Outputs conn.setUseCaches(false); // Don't use a Cached Copy conn.setRequestMethod("POST"); conn.setRequestProperty("Connection", "Keep-Alive"); conn.setRequestProperty("ENCTYPE", "multipart/form-data"); conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary); conn.setRequestProperty("uploaded_file", fileName); //conn.setRequestProperty("pid", "4"); dos = new DataOutputStream(conn.getOutputStream()); dos.writeBytes(twoHyphens + boundary + lineEnd); dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""+ fileName + "\"" + lineEnd); dos.writeBytes(lineEnd); bytesAvailable = fileInputStream.available(); // create a buffer of maximum size bufferSize = Math.min(bytesAvailable, maxBufferSize); buffer = new byte[bufferSize]; // read file and write it into form... bytesRead = fileInputStream.read(buffer, 0, bufferSize); while (bytesRead > 0) { dos.write(buffer, 0, bufferSize); bytesAvailable = fileInputStream.available(); bufferSize = Math.min(bytesAvailable, maxBufferSize); bytesRead = fileInputStream.read(buffer, 0, bufferSize); } // send multipart form data necesssary after file data... dos.writeBytes(lineEnd); dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd); // Responses from the server (code and message) serverResponseCode = conn.getResponseCode(); String serverResponseMessage = conn.getResponseMessage(); Log.i("uploadFile", "HTTP Response is : " + serverResponseMessage + ": " + serverResponseCode); if(serverResponseCode != 200) { getActivity().runOnUiThread(new Runnable() { public void run() { Toast.makeText(context, "Il y a une erreur l'hors du trasfert de l'image.", Toast.LENGTH_SHORT).show(); } }); } //close the streams // fileInputStream.close(); dos.flush(); dos.close(); } catch (MalformedURLException ex) { // dialog.dismiss(); ex.printStackTrace(); Toast.makeText(context, "MalformedURLException", Toast.LENGTH_SHORT).show(); Log.e("Upload file to server", "error: " + ex.getMessage(), ex); } catch (Exception e) { // dialog.dismiss(); e.printStackTrace(); Toast.makeText(context,errMsg+ "Exception : " + e.getMessage(), Toast.LENGTH_SHORT).show(); Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e); } // dialog.dismiss(); return serverResponseCode; }

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