Chiama AsyncTask da un'altra classe e restituisci Android Studio null

Sto cercando di chiamare un AsyncTask tramite un metodo dalla classe ParseQuerys per utilizzare tali informazioni in un ListView del mio frammento lvRestaurantFrag. Il problema è che il metodo restituisce null perché AsyncTask non arriva a onPostExecute. Non so come risolverlo.
Qui lascio il mio codice:
JSON
Collegamento API
[
{
"idBranchRestaurant": 1,
"idRestaurant": 1,
"ristorante":{
"idRestaurant": 1,
"nome": "Don Julio",
"description": "La mejor parrilla para cualquier turista",
"rete sociale":[
{
"idSocialNetworkRestaurant": 1,
"idRestaurant": 1,
"idTypeSocialNetwork": 1,
"value": "www.donjulio.com.ar",
"genere":{
"idTypeSocialNetwork": 1,
"nome": "Sito web",
"icon": "website_ic.jpg"
}
}
]
},
"idRangePriceBranch": 1,
"RangePrice": {
"idRangePriceBranch": 1,
"idBranchRestaurant": 1,
"minimo": 300,
"massimo": 600
},
"name": "Paraguay",
"foto":[
{
"idBranchPhoto": 4,
"idBranchRestaurant": 1,
"branch": null,
"idUser": 0,
"utente": null,
"foto": "entradaDonJulio.jpg"
}
],
"cucina":[
{
"idCousine": 1,
"nome": "Parrilla"
}
],
"menù":[
{
"idTypeMenu": 1,
"nome": "Mediodia",
"idBranchRestaurant": 1,
"piatti": null
},
{
"idTypeMenu": 2,
"name": "Noche",
"idBranchRestaurant": 1,
"piatti": null
}
],
"filtro":[
{
"idTypeFilter": 2,
"nome": "Famiglia",
"icon": "family_ic.jpg"
}
],
"servizio":[
{
"idService": 2,
"name": "Comida para celiacos"
},
{
"idService": 1,
"name": "Wifi"
}
],
"orario":[
{
"idTimetableBranch": 11,
"idBranchRestaurant": 1,
"idDay": 2,
"openingHour": "19 hs",
"closingHour": "24 hs",
"giorno":{
"idDay": 2,
"name": "Tuesday"
}
},
{
"idTimetableBranch": 10,
"idBranchRestaurant": 1,
"idDay": 2,
"openingHour": "12 hs",
"closingHour": "16 h",
"giorno":{
"idDay": 2,
"name": "Tuesday"
}
},
{
"idTimetableBranch": 9,
"idBranchRestaurant": 1,
"idDay": 1,
"openingHour": "19 hs",
"closingHour": "24 hs",
"giorno":{
"idDay": 1,
"name": "Monday"
}
},
{
"idTimetableBranch": 8,
"idBranchRestaurant": 1,
"idDay": 1,
"openingHour": "12 hs",
"closingHour": "16 hs",
"giorno":{
"idDay": 1,
"name": "Monday"
}
},
{
"idTimetableBranch": 12,
"idBranchRestaurant": 1,
"idDay": 3,
"openingHour": "12 hs",
"closingHour": "16 hs",
"giorno":{
"idDay": 3,
"name": "mercoledì"
}
},
{
"idTimetableBranch": 13,
"idBranchRestaurant": 1,
"idDay": 3,
"openingHour": "19 hs",
"closingHour": "24 hs",
"giorno":{
"idDay": 3,
"name": "mercoledì"
}
},
{
"idTimetableBranch": 14,
"idBranchRestaurant": 1,
"idDay": 4,
"openingHour": "12 hs",
"closingHour": "16 h",
"giorno":{
"idDay": 4,
"name": "giovedì"
}
},
{
"idTimetableBranch": 15,
"idBranchRestaurant": 1,
"idDay": 4,
"openingHour": "19 hs",
"closingHour": "24 hs",
"giorno":{
"idDay": 4,
"name": "giovedì"
}
},
{
"idTimetableBranch": 16,
"idBranchRestaurant": 1,
"idDay": 5,
"openingHour": "12 hs",
"closingHour": "16 h",
"giorno":{
"idDay": 5,
"name": "Friday"
}
},
{
"idTimetableBranch": 17,
"idBranchRestaurant": 1,
"idDay": 5,
"openingHour": "19 hs",
"closingHour": "2 hs",
"giorno":{
"idDay": 5,
"name": "Friday"
}
}
],
"latitude": "87654322",
"longitude": "23456789",
"calification": null,
"averageFood": 4,0,
"averageService": 4,0,
"averageAmbience": 4,0,
"averageCalification": 4.0,
"promozione":[
{
"idPromotion": 3,
"idTypePromotion": 2,
"codice": "DIADELPADRE",
"nome": "Dia Del Padre Regalo",
"startDate": "2017-06-26T00: 00: 00",
"expireDate": "2017-06-18T00: 00: 00",
"description": "postre de regalo",
"valore": 100,
"genere":{
"idTypePromotion": 2,
"name": "Regalo"
}
}
]
},
{
"idBranchRestaurant": 2,
"idRestaurant": 2,
"ristorante":{
"idRestaurant": 2,
"name": "La Hormiga",
"description": "el lugar Explota de gente y en especial de gente de ort",
"rete sociale":[
{
"idSocialNetworkRestaurant": 2,
"idRestaurant": 2,
"idTypeSocialNetwork": 2,
"value": "www.facebook.com/LaHormiga",
"genere":{
"idTypeSocialNetwork": 2,
"nome": "Facebook",
"icon": "fb_ic.jpg"
}
}
]
},
"idRangePriceBranch": 1,
"RangePrice": {
"idRangePriceBranch": 1,
"idBranchRestaurant": 1,
"minimo": 300,
"massimo": 600
},
"nome": "Ort",
"foto":[
{
"idBranchPhoto": 5,
"idBranchRestaurant": 2,
"branch": null,
"idUser": 0,
"utente": null,
"foto": "entradaLaHormiga.jpg"
}
],
"cucina":[
{
"idCousine": 2,
"name": "Pizza"
}
],
"menù":[
{
"idTypeMenu": 3,
"name": "Mediodia",
"idBranchRestaurant": 2,
"piatti": null
}
],
"filtro":[
{
"idTypeFilter": 1,
"name": "Con sconto",
"icon": "discount_ic.jpg"
}
],
"servizio":[
{
"idService": 3,
"name": "Aire acondicionado"
},
{
"idService": 1,
"name": "Wifi"
}
],
"orario":[
{
"idTimetableBranch": 18,
"idBranchRestaurant": 2,
"idDay": 6,
"openingHour": "11 hs",
"closingHour": "15 hs",
"giorno":{
"idDay": 6,
"name": "Sabato"
}
},
{
"idTimetableBranch": 19,
"idBranchRestaurant": 2,
"idDay": 7,
"openingHour": "11 hs",
"closingHour": "15 hs",
"giorno":{
"idDay": 7,
"name": "Sunday"
}
}
],
"latitude": "234567897",
"longitude": "123456789",
"calification": null,
"averageFood": 5,0,
"averageService": 5,0,
"averageAmbience": 5,0,
"averageCalification": 5,0,
"promozione":[
]
},
{
"idBranchRestaurant": 3,
"idRestaurant": 3,
"ristorante":{
"idRestaurant": 3,
"nome": "paja rota",
"description": "La mejor parrilla de ramosmejia ",
"rete sociale":[
{
"idSocialNetworkRestaurant": 3,
"idRestaurant": 3,
"idTypeSocialNetwork": 3,
"valore": "twitter.com/Pajarota",
"genere":{
"idTypeSocialNetwork": 3,
"nome": "Twitter",
"icon": "ic_twitter.png"
}
}
]
},
"idRangePriceBranch": 3,
"RangePrice": {
"idRangePriceBranch": 3,
"idBranchRestaurant": 3,
"minimo": 50,
"massimo": 250
},
"name": "Ramos MEjia",
"foto":[
{
"idBranchPhoto": 6,
"idBranchRestaurant": 3,
"branch": null,
"idUser": 0,
"utente": null,
"foto": "EntradaPajaRota.jpg"
}
],
"cucina":[
{
"idCousine": 1,
"nome": "Parrilla"
}
],
"menù":[
{
"idTypeMenu": 4,
"name": "Mediodia",
"idBranchRestaurant": 3,
"piatti": null
},
{
"idTypeMenu": 5,
"name": "Noche",
"idBranchRestaurant": 3,
"piatti": null
}
],
"filtro":[
{
"idTypeFilter": 2,
"nome": "Famiglia",
"icon": "family_ic.jpg"
}
],
"servizio":[
{
"idService": 1,
"name": "Wifi"
},
{
"idService": 4,
"name": "Carta de braille"
}
],
"orario":[
{
"idTimetableBranch": 20,
"idBranchRestaurant": 3,
"idDay": 5,
"openingHour": "12 hs",
"closingHour": "16 h",
"giorno":{
"idDay": 5,
"name": "Friday"
}
},
{
"idTimetableBranch": 21,
"idBranchRestaurant": 3,
"idDay": 5,
"openingHour": "19 hs",
"closingHour": "2 hs",
"giorno":{
"idDay": 5,
"name": "Friday"
}
},
{
"idTimetableBranch": 22,
"idBranchRestaurant": 3,
"idDay": 6,
"openingHour": "12 hs",
"closingHour": "16 h",
"giorno":{
"idDay": 6,
"name": "Sabato"
}
},
{
"idTimetableBranch": 23,
"idBranchRestaurant": 3,
"idDay": 6,
"openingHour": "19 hs",
"closingHour": "2 hs",
"giorno":{
"idDay": 6,
"name": "Sabato"
}
},
{
"idTimetableBranch": 24,
"idBranchRestaurant": 3,
"idDay": 7,
"openingHour": "12 hs",
"closingHour": "16 h",
"giorno":{
"idDay": 7,
"name": "Sunday"
}
}
],
"latitude": "12345678",
"longitude": "87654321",
"calification": null,
"averageFood": 5,0,
"averageService": 5,0,
"averageAmbience": 5,0,
"averageCalification": 5,0,
"promozione":[
]
},
{
"idBranchRestaurant": 4,
"idRestaurant": 4,
"ristorante":{
"idRestaurant": 4,
"name": "la espiga",
"description": "el mejor lugar para comer pastas",
"rete sociale":[
{
"idSocialNetworkRestaurant": 4,
"idRestaurant": 4,
"idTypeSocialNetwork": 4,
"value": "instagram.com/laespiga",
"genere":{
"idTypeSocialNetwork": 4,
"nome": "Instagram",
"icon": "ic_Instagram.png"
}
}
]
},
"idRangePriceBranch": 4,
"RangePrice": {
"idRangePriceBranch": 4,
"idBranchRestaurant": 4,
"minimo": 80,
"massimo": 150
},
"nome": "Almagro",
"foto":[
{
"idBranchPhoto": 7,
"idBranchRestaurant": 4,
"branch": null,
"idUser": 0,
"utente": null,
"foto": "EntradaLaEspiga.jpg"
}
],
"cucina":[
{
"idCousine": 4,
"name": "Pasta"
}
],
"menù":[
{
"idTypeMenu": 6,
"name": "Tarde",
"idBranchRestaurant": 4,
"piatti": null
}
],
"filtro":[
{
"idTypeFilter": 1,
"name": "Con sconto",
"icon": "discount_ic.jpg"
}
],
"servizio":[
{
"idService": 1,
"name": "Wifi"
},
{
"idService": 3,
"name": "Aire acondicionado"
}
],
"orario":[
{
"idTimetableBranch": 26,
"idBranchRestaurant": 4,
"idDay": 1,
"openingHour": "16 h",
"closingHour": "19 hs",
"giorno":{
"idDay": 1,
"name": "Monday"
}
},
{
"idTimetableBranch": 27,
"idBranchRestaurant": 4,
"idDay": 2,
"openingHour": "16 hs",
"closingHour": "19 hs",
"giorno":{
"idDay": 2,
"name": "Tuesday"
}
},
{
"idTimetableBranch": 28,
"idBranchRestaurant": 4,
"idDay": 3,
"openingHour": "16 h",
"closingHour": "19 hs",
"giorno":{
"idDay": 3,
"name": "mercoledì"
}
},
{
"idTimetableBranch": 29,
"idBranchRestaurant": 4,
"idDay": 4,
"openingHour": "16 h",
"closingHour": "19 hs",
"giorno":{
"idDay": 4,
"name": "giovedì"
}
},
{
"idTimetableBranch": 30,
"idBranchRestaurant": 4,
"idDay": 5,
"openingHour": "16 hs",
"closingHour": "19 hs",
"giorno":{
"idDay": 5,
"name": "Friday"
}
}
],
"latitude": "87657467",
"longitude": "45254567",
"calification": null,
"averageFood": 5,0,
"averageService": 5,0,
"averageAmbience": 5,0,
"averageCalification": 5,0,
"promozione":[
]
}
]
Classe ParseQuery
server String privato = "http://appmorfando.azurewebsites.net/api/";
ParsingObjects parse = new ParsingObjects ();
// Query per i rami dell'elenco
private ArrayList  branch = new ArrayList  ();
public ArrayList  getAllBranch (int limit, int offset) {
new BranchGetAll (). execute ("branch /", limit + "", offset + "");
rami di ritorno;
}
la classe privata BranchGetAll estende AsyncTask > {
protected void onPostExecute (ArrayList  datos) {
super.onPostExecute (datos);
rami = dati;
}
@Oltrepassare
protected ArrayList  doInBackground (String ... parametros) {
URL stringa = parametros [0] + parametros [1] + "/" + parametros [2];
ArrayList  branchList = new ArrayList  ();
OkHttpClient client = nuovo OkHttpClient ();
Richiesta richiesta = nuovo Request.Builder ()
.url (server + url)
.costruire();
Resultado della stringa;
provare {
Risposta risposta = client.newCall (richiesta) .execute (); // Llamo al API Rest servicio1 en ejemplo.com
resultado = response.body (). string ();
} catch (IOException e) {
Log.d ("Errore", e.getMessage ()); // Errore di rete
return null;
}
provare{
JSONArray jsonBranch = nuovo JSONArray (risultato);
for (int i = 0; i  listBranches;
public View onCreateView (LayoutInflater inflater, ViewGroup group, Bundle data) {
Visualizza toReturn;
toReturn = inflater.inflate (R.layout.frag_restaurant_lv, group, false);
main = (MainActivity) getActivity ();
pq = new ParseQuery ();
restaurantItems = (ListView) toReturn.findViewById (R.id.lvRestaurantItems);
// Qui diventa nullo quindi la dimensione dell'adattatore è 0
listBranches = pq.getAllBranch (10,0);
adapter = new lvRestaurantAdapter (listBranches, main);
restaurantItems.setAdapter (adattatore);
restaurantItems.setOnItemClickListener (questo);
return toReturn;
}
@Oltrepassare
public void onItemClick (AdapterView  parent, View view, int position, long id) {
int idBranch = adapter.getId (posizione);
main.BranchSelected (idBranch);
}
}