I have json api with many objects in it, I want store the data in the Map after giving a key. Then I want use that Map list later. below is the way i want do it.
Map<Integer, Integer> maplist; /// globle variable
//// inside response method inside the for loop
maplist = new HasMap<>();
maplist.put(10, 1);
//////.....
........
You can do something like this. below is the sample code
public void getQtyReserved() {
JsonObjectRequest request_json = new JsonObjectRequest(Request.Method.GET, cart_url + name, null,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
listMap = new HashMap<Integer, Integer>();
try {
JSONArray ja_data = response.getJSONArray("list");
int length = ja_data.length();
for (int i = 0; i < length; i++) {
JSONObject jsonobject = ja_data.getJSONObject(i);
int quantity_reserved = jsonobject.getInt("quantity_reserved");
int inventory_id = jsonobject.getInt("inventory_id");
listMap.put(inventory_id, quantity_reserved);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.e("Error: ", error.getMessage());
Toast.makeText(getApplicationContext(), "its empty", Toast.LENGTH_LONG).show();
}
});
MySingleton.mySingletonInstance(getApplicationContext()).addToRequestque(request_json);
}
I get the error no value for city.
I'm new to Android. I was unable to pass the spinner data using PHP URL, volley method. And in my XML I'm using the spinner and text views city, id and pass the city list through spinner URL.
Here is my activity:
private void spinnerapi(){
sprCoun = (Spinner) findViewById(R.id.spinner);
RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
String serverURL = "server url";
final StringRequest getRequest = new StringRequest(Request.Method.POST, serverURL,
new com.android.volley.Response.Listener<String>() {
#Override
public void onResponse(String response) {
Log.d("officerResponse", response);
try {
JSONObject jsonObject = new JSONObject(response);
String str_status = jsonObject.getString("status");
String str_message = jsonObject.getString("message");
JSONArray jsonArray = jsonObject.getJSONArray("data");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObjectGuest = jsonArray.getJSONObject(i);
city_name = jsonObjectGuest.getString("cityname");
city_id = jsonObjectGuest.getString("cityid");
listarraylist.add(new CityModel(city_name));
}
sprCoun.setAdapter(new ArrayAdapter<String>
(RegistrationActivity.this, android.R.layout.simple_spinner_dropdown_item, list));
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(), "" + e, Toast.LENGTH_LONG).show();
}
}
},
new com.android.volley.Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
// error
// Toast.makeText(context, "" + error, Toast.LENGTH_LONG).show();
Log.d("tyghj", String.valueOf(error));
}
}
) {
#Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
return params;
}
};
queue.add(getRequest);
}
I have a big problem with volley request sequence and making json array out of first request response for second request.
this is the code :
JSONObject imageAddedResponse = new JSONObject();
JSONArray imagesAddedResponse = new JSONArray();
public void postImageData(Context applicationContext, String title, String note, ArrayList<ContentData> mImages, String videoPath, final Listeners.APIPostDataListener listener) {
//Instantiate the RequestQueue.
RequestQueue requestQueue = Volley.newRequestQueue(applicationContext);
Settings settings = new Settings(applicationContext);
String selectedURL = settings.getChosenUrl();
final String token = settings.getTokenKey();
String url = "http://" + selectedURL + "/databox/api/v1/upload/files";
HashMap<String, String> params = new HashMap<String, String>();
params.put("Authorization", "Bearer " + token);
params.put("Content-Disposition", "form-data" + "; charset=utf-8");
//POST data to CMS to get JSONObject back
for (int i = 0; i < mImages.size(); i++) {
String path = String.valueOf(mImages.get(i).getPath());
File file = new File(path);
MultipartRequest request = new MultipartRequest(url, file, Response.class, params, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
if (listener != null) {
listener.onAPIPostData(String.valueOf(response), true);
}
if (response != null || response != "") {
try {
imageAddedResponse = new JSONObject(response);
JSONObject jsonArraydata = imageAddedResponse.getJSONObject("data");
JSONArray jsonArrayImages = jsonArraydata.getJSONArray("images");
imagesAddedResponse.put(jsonArrayImages);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("Volley Request Error", error.toString());
if (listener != null) {
listener.onAPIPostData("", false);
}
}
});
requestQueue.add(request);
}
//POST request to add entity to CMS
JSONObject jsonimages = new JSONObject();
JSONArray jsonArrayimages = new JSONArray();
for (int i = 0 ; i < imagesAddedResponse.length() ; i++){
try {
JSONObject getObjectValues = imagesAddedResponse.getJSONObject(i);
jsonimages.put("id",getObjectValues.getString("id"));
jsonimages.put("src",getObjectValues.getString("src"));
jsonimages.put("size",getObjectValues.getString("size"));
jsonimages.put("baseName",getObjectValues.getString("baseName"));
jsonimages.put("type",getObjectValues.getString("type"));
jsonimages.put("db_languages_id", "1");
jsonimages.put("title",String.valueOf(mImages.get(i).getTitle()));
} catch (JSONException e) {
e.printStackTrace();
}
}
JSONObject json = new JSONObject();
JSONArray jsonArray = new JSONArray();
JSONObject finalobject = new JSONObject();
try {
json.put("title", title);
json.put("description", note);
json.put("db_languages_id", "1");
json.put("db_user_id", "3");
jsonArray.put(json);
finalobject.put("data", jsonArray);
} catch (JSONException e) {
e.printStackTrace();
}
String urlFinal = "http://" + selectedURL + "/databox/api/v1/1/entity";
JsonObjectRequest postRequest = new JsonObjectRequest(urlFinal, json, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
// response
if (listener != null) {
listener.onAPIPostData(String.valueOf(response), true);
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
// TODO Auto-generated method stub
if (listener != null) {
listener.onAPIPostData("", false);
}
}
}
) {
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
params.put("Authorization", "Bearer " + token);
params.put("Content-Type", "application/json; charset=utf-8");
return params;
}
};
postRequest.setShouldCache(false);
requestQueue.add(postRequest);
}
first request post to CMS and get some information for images posted and then I need to add those information to next post to make entity based on response I got back from first post request.
int totalSuccesfulImagePost = 0; //this variable increment when each succesful response from multipart-request
public void postImageData(Context applicationContext, String title, String note, ArrayList<ContentData> mImages, String videoPath, final Listeners.APIPostDataListener listener) {
//Instantiate the RequestQueue.
RequestQueue requestQueue = Volley.newRequestQueue(applicationContext);
Settings settings = new Settings(applicationContext);
String selectedURL = settings.getChosenUrl();
final String token = settings.getTokenKey();
String url = "http://" + selectedURL + "/databox/api/v1/upload/files";
HashMap<String, String> params = new HashMap<String, String>();
params.put("Authorization", "Bearer " + token);
params.put("Content-Disposition", "form-data" + "; charset=utf-8");
//POST data to CMS to get JSONObject back
for (int i = 0; i < mImages.size(); i++) {
String path = String.valueOf(mImages.get(i).getPath());
File file = new File(path);
MultipartRequest request = new MultipartRequest(url, file, Response.class, params, new Response.Listener<String>() {
#Override
public void onResponse(String response) {
if (listener != null) {
listener.onAPIPostData(String.valueOf(response), true);
}
if (response != null || response != "") {
try {
imageAddedResponse = new JSONObject(response);
JSONObject jsonArraydata = imageAddedResponse.getJSONObject("data");
JSONArray jsonArrayImages = jsonArraydata.getJSONArray("images");
imagesAddedResponse.put(jsonArrayImages.getJSONObject(0));
totalSuccesfulImagePost++; //here we increase the count
postRequest(token); //call this method and check wheather all the image uploaded or not
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("Volley Request Error", error.toString());
if (listener != null) {
listener.onAPIPostData("", false);
}
}
});
requestQueue.add(request);
}
}
//make this as seperate method and call when all multipart-request call succesful
public void postRequest(String token){
if(totalSuccesfulImagePost != mImages.size()) {
//this means not all the images posted yet, hence return the method
return;
}
//POST request to add entity to CMS
JSONObject jsonimages = new JSONObject();
JSONArray jsonArrayimages = new JSONArray();
for (int i = 0 ; i < imagesAddedResponse.length() ; i++){
try {
JSONObject getObjectValues = imagesAddedResponse.getJSONObject(i);
jsonimages.put("id",getObjectValues.getString("id"));
jsonimages.put("src",getObjectValues.getString("src"));
jsonimages.put("size",getObjectValues.getString("size"));
jsonimages.put("baseName",getObjectValues.getString("baseName"));
jsonimages.put("type",getObjectValues.getString("type"));
jsonimages.put("db_languages_id", "1");
jsonimages.put("title",String.valueOf(mImages.get(i).getTitle()));
} catch (JSONException e) {
e.printStackTrace();
}
}
JSONObject json = new JSONObject();
JSONArray jsonArray = new JSONArray();
JSONObject finalobject = new JSONObject();
try {
json.put("title", title);
json.put("description", note);
json.put("db_languages_id", "1");
json.put("db_user_id", "3");
jsonArray.put(json);
finalobject.put("data", jsonArray);
} catch (JSONException e) {
e.printStackTrace();.getJSONObject(0)
}
String urlFinal = "http://" + selectedURL + "/databox/api/v1/1/entity";
JsonObjectRequest postRequest = new JsonObjectRequest(urlFinal, json, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
// response
if (listener != null) {
listener.onAPIPostData(String.valueOf(response), true);
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
// TODO Auto-generated method stub
if (listener != null) {
listener.onAPIPostData("", false);
}
}
}
) {
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
params.put("Authorization", "Bearer " + token);
params.put("Content-Type", "application/json; charset=utf-8");
return params;
}
};
postRequest.setShouldCache(false);
requestQueue.add(postRequest);
}
updated your code. Hope this may help you.
I've created new method for JsonObjectRequest with the name postRequest();
totalSuccesfulImagePost variable holds the no. of succesfull response for image upload
new method postRequest() calls at each multipart-request response
postRequest() methods check if not all response process yet than skip the 2nd api call
Also see how fb do this batch request https://developers.facebook.com/docs/android/graph/ -> Batch Reqest
Note -
Ive increment the variable totalSuccesfulImagePost and handle in each response, although you need to Response.ErrorListener()
Although you can go with the ThreadPoolExecutor option where each thread is created to handle each multipart-request upload and after all thread execution , call the method postRequest()
Work-around using ThreadPoolExecutor
a) Create ThreadPoolExecutor & initialize min/max pool size
b) Asign each mulitpart-request to upload image to each thread
c) Add all thread (contain image upload multipart-request) to ThreadPoolExecutor
d) Execute pool
e) call postRequest() method when ThreadPoolExecutor is empty i.e. this means all the thread execution is done and ready to call postRequest()
it is possible using Priority Of each Request.
private Priority priority = Priority.HIGH;
StringRequest strReq = new StringRequest(Method.GET,
Const.URL_STRING_REQ, new Response.Listener<String>() {
#Override
public void onResponse(String 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();
}
}) {
#Override
public Priority getPriority() {
return priority;
}
};
MyApplication.getInstance().addToRequestQueue(strReq);
This question already has answers here:
JSON Array of strings (no objects), extracting data
(4 answers)
Closed 6 years ago.
its actually a simple code, cuz of lack of basic I still cant manage to handle this.
After I made a Post JSON Method on my own Api, I get the following response
[{"id":"2"}]
What I'm trying to achieve is that I would like to get the value of this "id" which is "2".
I've tried the following code in my private void method
private void getUserID() {
StringRequest stringRequest = new StringRequest(Method.POST,Constants.GET_USER_ID,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
Toast.makeText(MainActivity.this, response, Toast.LENGTH_LONG).show();
try {
JSONObject jsonRootObject = new JSONObject(strJson);
//Get the instance of JSONArray that contains JSONObjects
JSONArray jsonArray = jsonRootObject.optJSONArray("");
//Iterate the jsonArray and print the info of JSONObjects
for(int i=0; i < jsonArray.length(); i++){
JSONObject jsonObject = jsonArray.getJSONObject(i);
int id = Integer.parseInt(jsonObject.optString("id").toString());
String idUser = jsonObject.optString("id").toString();
}
output.setText(idUser);
} catch (JSONException e) {e.printStackTrace();}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(MainActivity.this, error.toString(), Toast.LENGTH_LONG).show();
}
})
{
#Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> map = new HashMap<>();
map.put(Constants.KEY_A, username);
map.put(Constants.KEY_B, password);
return map;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
I get it from here.
It's a bit of waste, because I only have one list object in my array, and I thinks for loop is not really important in here.
replace your try block with following
try {
JSONArray jsonArray = new JSONArray(response);
JSONObject jsonObject = jsonArray.getJSONObject(0);
String idUser = jsonObject.getString("id");
Log.e("id is: ", idUser);
}
Try this way you will get
private void makeJsonArrayRequest() {
showpDialog();
JsonArrayRequest req = new JsonArrayRequest( delprourl,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d("ress", response.toString());
// Parsing json
try {
for (int i = 0; i < response.length(); i++) {
JSONObject person = (JSONObject) response
.get(i);
System.out.println("person" + person);
//get your id here
String id = person.getString("id");
Log.e("id: ", id);
}
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(),
"Error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
hidepDialog();
// 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("ErrorVolley", "Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_SHORT).show();
hidepDialog();
}
});
MyApplication.getInstance().addToReqQueue(req, "jreq");
}
private void showpDialog() {
if (!pDialog.isShowing())
pDialog.show();
}
private void hidepDialog() {
if (pDialog.isShowing())
pDialog.dismiss();
}
I have a String declared at a class level.
String eta;
I am passing a url to a method in that same class that will use volley to retrieve distance from one of Google apis. I then assign the response String to my global variable eta. It has the needed value within the method but the global value is null when it is returned. I can't understand this behavior. What am I doing wrong here?
public String getDuration(String url){
RequestQueue queue = Volley.newRequestQueue(this);
JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.POST, url, null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
String j = response.getString("rows");
JSONArray rowa = new JSONArray(j);
JSONObject rowobj = rowa.getJSONObject(0);
JSONArray elementsa = rowobj.getJSONArray("elements");
for (int i = 0; i < elementsa.length(); i++) {
JSONObject currentObject = elementsa.getJSONObject(i);
String duration = currentObject.getString("duration_in_traffic");
JSONObject timeObject = new JSONObject(duration);
**eta = timeObject.getString("text"); //eta has the needed value**
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
queue.add(jsObjRequest);
**return eta; //here eta is null**
}
onResponse(JSONObject response) is asynchronous.
You are calling getDuration(String url) and setting a listener that will be called when the network operation ends.
Instead of waiting the listener to be called you are returning the value (that it is not set at the moment) and that's why you get a null value.
Inside onResponse(JSONObject response) you should call the method that needs eta value.
public void getDuration(String url){
RequestQueue queue = Volley.newRequestQueue(this);
JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.POST, url, null, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
String j = response.getString("rows");
JSONArray rowa = new JSONArray(j);
JSONObject rowobj = rowa.getJSONObject(0);
JSONArray elementsa = rowobj.getJSONArray("elements");
for (int i = 0; i < elementsa.length(); i++) {
JSONObject currentObject = elementsa.getJSONObject(i);
String duration = currentObject.getString("duration_in_traffic");
JSONObject timeObject = new JSONObject(duration);
eta = timeObject.getString("text"); //eta has the needed value**
methodThatUsesValue(eta);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
queue.add(jsObjRequest);
}