Volley send JSONObject to server with POST method - post

Question

I want to send a jsonobject with below format to server by using volley library
{
"user_id": 12,
"answers": {
"11": 3,
"12": 4,
"13": 5
}
}
JSONObject object = new JSONObject();
try {
object.put("user_id", user_id);
JSONObject answers = new JSONObject();
for (int i = 0; i < questions.size(); i++) {
JSONObject answer = new JSONObject();
answer.put(questions.get(i).getId(),questions.get(i).getAnswer());
answers.put("answers", answer);
object.put("answers", answer);
}
} catch (JSONException e) {
e.printStackTrace();
}
If I want to use StringRequest how should I send this JsonObject to server by using POST method

Answer 1

You can use the following working sample code. I have tested. Hope this helps!
try {
jsonBody = new JSONObject();
jsonBody.put("Title", "VolleyApp Android Demo");
jsonBody.put("Author", "BNK");
jsonBody.put("Date", "2015/08/26");
requestBody = jsonBody.toString();
StringRequest stringRequest = new StringRequest(1, url, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
textView.setText(response);
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
textView.setText(error.toString());
}
}) {
#Override
public String getBodyContentType() {
return String.format("application/json; charset=utf-8");
}
#Override
public byte[] getBody() throws AuthFailureError {
try {
return requestBody == null ? null : requestBody.getBytes("utf-8");
} catch (UnsupportedEncodingException uee) {
VolleyLog.wtf("Unsupported Encoding while trying to get the bytes of %s using %s",
requestBody, "utf-8");
return null;
}
}
};
MySingleton.getInstance(this).addToRequestQueue(stringRequest);
} catch (JSONException e) {
e.printStackTrace();
}
UPDATE: To create JSONObject as your requirement, use the following:
JSONObject jsonObject = new JSONObject();
try {
jsonObject.put("11", 3);
jsonObject.put("12", 4);
jsonObject.put("13", 5);
JSONObject jsonObject2 = new JSONObject().put("answers", jsonObject);
jsonObject2.put("user_id", 12);
} catch (JSONException e) {
e.printStackTrace();
}

Answer 2

use the following sample code
RequestQueue queue = Volley.newRequestQueue(this);
private void serverFronJsonObjReq() {
showProgressDialog();
Map<String, String> postParam= new HashMap<String, String>();
postParam.put("username", "singh#gmail.com");
postParam.put("password", "123456");
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.POST,
Const.BASE_URL_LOGIN, new JSONObject(postParam),
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Log.d(TAG, response.toString());
msgResponse.setText(response.toString());
hideProgressDialog();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
hideProgressDialog();
}
}) {
/**
Passing some request headers
* */
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("Content-Type", "application/json; charset=utf-8");
return headers;
}
};
jsonObjReq.setTag(TAG);
// Adding request to request queue
queue.add(jsonObjReq);
// Cancelling request
/* if (queue!= null) {
queue.cancelAll(TAG);
} */
}