I know this question has been asked a few times and i have tried all the solutions however, nothing seems to work. My method:
public static LocationGeoData getLocationGeoData(Location location){
RequestQueue requestQueue = Volley.newRequestQueue(MyApplication.getAppContext());
Date dateNow = new Date();
SimpleDateFormat fmt = new SimpleDateFormat("yyyy.MM.dd");
String url = "MYCORRECTURL";
Log.d("geoData", "In getGeoData " + url); // this is called and logs
JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, url,
null,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Log.d("geoData", "inside the response");// this never gets called
try {
JSONObject jsonObject = response.getJSONObject("data");
for(int i = 0; i <jsonObject.length(); i++){
JSONObject heading = jsonObject;
if(heading.getString("field-value").equals("field-value")){
JSONObject totIntensity = heading.getJSONObject("total-intensity");
JSONObject declination = heading.getJSONObject("declination");
JSONObject inclination = heading.getJSONObject("inclination");
int totalIntensity = totIntensity.getInt("value");
double declinationValue = declination.getDouble("value");
double inclinationValue = inclination.getDouble("value");
locationGeoData = new LocationGeoData(totalIntensity, declinationValue, inclinationValue);
}
}
} catch (JSONException e) {
Log.d("geoData", "Error recorded");//never called
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.d("geoData", "Error recorded");// never called
}
});
requestQueue.add(request);
return locationGeoData;
}
The second Log message inside the response never gets called, i get no error messages, my url works and i can see the JsonOBject in the browser when tested, but the response is never called in my method. Can anyone advise me what i am doing wrong?
Related
I want to parse a single url from my remote json file. I have a Button code in onCreate and I want to parse url from my json object to my DynamicButton.
private void parseJSON() {
String url = https://www.example.com/data.json
JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, url, null,
new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
try {
JSONArray jsonArray = response.getJSONArray("MyDynamicUrl");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject hit = jsonArray.getJSONObject(i);
String myDynamicLink = hit.getString("Link");
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
});
mRequestQueue.add(request);
}
I have this button in onCreate and Now I want to parse myDynamicLink to this button. I am getting Error "Can not resolve symbol 'MyDynamicLink' "
DLbtn = findViewById(R.id.DynamicLinkButton);
DLbtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String url = myDynamicLink;
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
}
});
My json file structure
{
"MyDynamicUrl": [
{"Link":"https://www.myDynamicUrl.com"}
]}
You should define myDynamicLink as a field outside of the method and then set a value to it:
private String myDynamicLink;
private void parseJSON() {
...
myDynamicLink = hit.getString("Link");
...
}
Also note, that the request is made asynchronously (on another thread),
it means that your button may be already initialized and you can click it, but possibly you may still not receive a response.
In addition, you may start using a library for converting JSON objects to Java objects, such as Gson, it will let you much easily parse the JSON.
I'm really new on android and I'm wokring on a login system, I'm using volley to post the data....the problem thatm I'm having is when i try to read the response....
the response looks like this:
{"st":"no","Message":"Error"}
I'm trying to access only st or message is there a way to do that ? I tried doing:
response[i] ----Array type expexted found ' org.json.JSONObject'
JsonObjectRequest jsonRequest = new JsonObjectRequest(Request.Method.POST, url, params, new Response.Listener<JSONObject>() {
#Override
public void onResponse(JSONObject response) {
Log.e(TAG, "Response: " + response.length());
for (int i = 0; i < response.length(); i++) {
Log.e(TAG, "Values: " + response);
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
});
Volley.newRequestQueue(this).add(jsonRequest);
You could use
response.getString("Message")
to get a message from given JSON
#Override
public void onResponse(String response) {
try {
JSONObject api_response = new JSONObject(response);
String message = api_response.getString("Message")
} catch (JSONException e) {
e.printStackTrace();
}
Its important to catch the json exception just in case the response string cannot be converted to json object. Then use the getString() to get the message from the created json object.
Question1: How to get response value in onResponse function.
Question2: I create cauHoiArrayList. when I check and get cauHoiArrayList values in onResponse function => it worked. But if I check and get cauHoiArrayList values in GETDATA function ==> it did not work. How to I get cauHoiArrayList values.
Thanks you,
This is my code details:
public void GetCauHoi(String url) {
RequestQueue requestQueue = Volley.newRequestQueue(this);
StringRequest stringRequest = new StringRequest(
Request.Method.POST,
url,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
try {
JSONArray array = new JSONArray(response);
cauHoiArrayList = new ArrayList<>();
for (int i = 0; i < array.length(); i++) {
JSONObject object = array.getJSONObject(i);
_id = object.getInt("_ID");
cauhoi = object.getString("CauHoi");
tenmh = object.getString("TenMH");
tenmonhoc = object.getString("TenMonHoc");
dapan_a = object.getString("DapAn_A");
dapan_b = object.getString("DapAn_B");
dapan_c = object.getString("DapAn_C");
dapan_d = object.getString("DapAn_D");
dapandung = object.getString("DapAnDung");
hinhanh = object.getString("HinhAnh");
dokho = object.getInt("DoKho");
cauHoiArrayList.add(new CauHoi(_id, cauhoi, tenmh, tenmonhoc, dapan_a, dapan_b, dapan_c, dapan_d, dapandung, hinhanh, dokho));
}
Log.d("tag",""+cauHoiArrayList.get(0).getCauHoi());
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(ScreenSlideActivity.this, ""+error, Toast.LENGTH_SHORT).show();
}
}) {
#Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("laytenmonhocc", "" + laytenmonhoc);
params.put("laydokhoc", "" + laydokho);
return params;
}
};
requestQueue.add(stringRequest);
}
public ArrayList<CauHoi> GETDATA (){
return cauHoiArrayList;
}
Volley requests are asynchronous. You must be calling GETDATA by time when response is not arrived yet. You need to sure call GETGATA when you have response. Only OnResponse method is guarantee that response is present.
I've tried with normal JSONArrayRequests and StringRequests and everything was fine untill now. I want to send an JSONArrayRequest with POST parameters to get some MySQL result in JSON format from the script. Unfortunately I get [] everytime in response. I have checked .php file and query with _GET method and the script worked perfectly returning desired rows in Json format.
I read here (https://stackoverflow.com/a/18052417/4959185) Volley Team have added JSONArrayRequest with _POST parameter to their class. However it does not work in my case. Could you please look what is wrong with that function:
private void getFavouriteRecipes(final String userUniqueId, final int offset) {
JsonArrayRequest favouriteRecipesReq = new JsonArrayRequest(Request.Method.POST,
AppConfig.URL_GETFAVOURITERECIPES, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d("odpowiedz", "Odpowiedź ulubionych: " + response);
for (int i = 0; i < response.length(); i++) {
try {
JSONObject jObj = response.getJSONObject(i);
RecipeItem recipeItem = new RecipeItem();
recipeItem.setRecipeUniqueID(jObj.getString("unique_id"));
recipeItem.setRecipeTitle(jObj.getString("title"));
recipeItem.setRecipeImgThumbnailLink(jObj.getString(
"img_tumbnail_link"));
recipeItem.setRecipeAddAte(jObj.getString("add_date"));
recipeItem.setRecipeKitchenType(jObj.getString("kitchen_type"));
recipeItem.setRecipeMealType(jObj.getString("meal_type"));
recipeItem.setRecipeName(jObj.getString("name"));
recipeItem.setRecipeSurname(jObj.getString("surname"));
recipeItem.setRecipeLikeCount(jObj.getString("like_count"));
recipeFavouriteItems.add(recipeItem);
} catch (JSONException e) {
e.printStackTrace();
showSnackbarInfo("Błąd Json: " + e.getMessage(),
R.color.snackbar_error_msg);
}
}
recipeFavouriteItemsAdapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("odpowiedz", "Błąd pobierania ulubionych: " +
Integer.toString(error.networkResponse.statusCode));
showSnackbarInfo(Integer.toString(error.networkResponse.statusCode),
R.color.snackbar_error_msg);
}
}) {
#Override
protected Map<String, String> getParams() {
// Posting Parameters to Login URL
Map<String, String> params = new HashMap<>();
params.put("user_unique_id", userUniqueId);
params.put("offset", Integer.toString(offset));
Log.d(TAG, "wysylam parametry: " + userUniqueId + ", " + Integer.toString(offset));
return params;
}
};
// Adding Request to Request Queue
AppController.getInstance().addToRequestQueue(favouriteRecipesReq);
}
My PHP Script:
https://ideone.com/ZxYzHr
I have found another way to get JSONArrayResponse with sending parameters. I think that will help somebody.
U just write standard JSONArrayRequest liek this:
JsonArrayRequest favouriteRecipesReq = new JsonArrayRequest(prepareGetMethodUrl(),
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
Log.d("odpowiedz", "Odpowiedź ulubionych: " + response.toString());
for (int i = 0; i < response.length(); i++) {
try {
JSONObject jObj = response.getJSONObject(i);
RecipeItem recipeItem = new RecipeItem();
recipeItem.setRecipeUniqueID(jObj.getString("unique_id"));
recipeItem.setRecipeTitle(jObj.getString("title"));
recipeItem.setRecipeImgThumbnailLink(jObj.getString(
"img_tumbnail_link"));
recipeItem.setRecipeAddAte(jObj.getString("add_date"));
recipeItem.setRecipeKitchenType(jObj.getString("kitchen_type"));
recipeItem.setRecipeMealType(jObj.getString("meal_type"));
recipeItem.setRecipeName(jObj.getString("name"));
recipeItem.setRecipeSurname(jObj.getString("surname"));
recipeItem.setRecipeLikeCount(jObj.getString("like_count"));
recipeFavouriteItems.add(recipeItem);
} catch (JSONException e) {
e.printStackTrace();
}
}
recipeFavouriteItemsAdapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Log.e("odpowiedz", "Błąd pobierania ulubionych: " +
Integer.toString(error.networkResponse.statusCode));
showSnackbarInfo(Integer.toString(error.networkResponse.statusCode),
R.color.snackbar_error_msg);
}
});
// Adding Request to Request Queue
AppController.getInstance().addToRequestQueue(favouriteRecipesReq);
Instead of standard URL to the PHP script I inserted function returning String called prepareGetMethodUrl().
Let's look inside it:
private String prepareGetMethodUrl() {
return AppConfig.URL_GETFAVOURITERECIPES + "?user_unique_id=" + userUniqueId + "&offset=" +
Integer.toString(offset);
}
As you can see it's very simple. I get standard AppConfig.URL_GETFAVOURITERECIPES which is static field in AppConfig class conatining direct link to my PHP script on my serwer f.e http://www.someserversite.com/my_api/gmy_php_script.php and combine it with parametres values I need to send to the script: user_unique_id and it's content userUniqueId and offset which content is offset parsed from int to String.
Inside my script I just call:
<?php
// some code
// Receiving The Post Params
$user_unique_id = $_GET['user_unique_id'];
$offset = $_GET['offset'];
echo $user_unique_id . "<br />";
echo $offset;
?>
I'm using this code for sending data to server , but when i want to parser response data on volley onResponse method , my UI freezing .
JsonObjectRequest req = new JsonObjectRequest(Method.GET, url, null, new Response.Listener<JSONObject>()
{
#Override
public void onResponse(JSONObject response)
{
parseFromJsonObject(response);
}
},
new Response.ErrorListener()
{
#Override
public void onErrorResponse(VolleyError error)
{
}
});
RequestHelper.getInstance().addToRequestQueue(req, this);
And it's parser method
public boolean parseFromJsonObject(JSONObject response)
{
boolean validResponse = super.isValidResponse(response);
try
{
if(response.has("keywords"))
{
JSONObject keywords = response.getJSONObject("keywords");
Iterator<?> langIterator = keywords.keys();
ArrayList<LanguagesStorage> languagesStorageArray = new ArrayList<LanguagesStorage>();
while(langIterator.hasNext())
{
String lang = (String) langIterator.next();
JSONObject langValues = keywords.getJSONObject(lang);
Iterator<?> valueIterator = langValues.keys();
while(valueIterator.hasNext())
{
String key = (String) valueIterator.next();
String value = (String) langValues.getString(key);
LanguagesStorage languagesStorage = new LanguagesStorage();
languagesStorage.setKey(key);
languagesStorage.setLang(lang);
languagesStorage.setValue(value);
languagesStorageArray.add(languagesStorage);
}
}
if(languagesStorageArray.size() > 0)
{
LanguageAdapter languageAdapter = new LanguageAdapter();
languageAdapter.insert(languagesStorageArray, true);
}
}
return lastParsingStatus = true;
}
catch (JSONException e)
{
RLog.error("Parsing error in keyword Parser " + e);
return lastParsingStatus = false;
}
}
What is the issue ? Why my UI thread freezing?
Volley onResponce work inside the UI thread
I recommend you to do parsing inside a separate thread.
In your parseFromJsonObject method, try to create a new Thread and inside that thread execute your parsing data.