Ring AsyncTask från en annan klass och returnera null Android Studio

Jag försöker ringa en AsyncTask genom en metod från ParseQuerys Class för att använda den informationen i en ListView av mitt fragment lvRestaurantFrag. Problemet är att metoden returnerar null eftersom AsyncTask inte kommer till onPostExecute. Jag vet inte hur jag kan fixa det.
Här lämnar jag min kod:
JSON
API-länk
[
{
"idBranchRestaurant": 1,
"idRestaurant": 1,
"restaurang":{
"idRestaurant": 1,
"name": "Don Julio",
"beskrivning": "La mejor parrilla para cualquier turista",
"socialt nätverk":[
{
"idSocialNetworkRestaurant": 1,
"idRestaurant": 1,
"idTypeSocialNetwork": 1,
"värde": "www.donjulio.com.ar",
"typ":{
"idTypeSocialNetwork": 1,
"name": "Webbplats",
"icon": "website_ic.jpg"
}
}
]
},
"idRangePriceBranch": 1,
"RangePrice": {
"idRangePriceBranch": 1,
"idBranchRestaurant": 1,
"minimum": 300,
"maximalt": 600
},
"name": "Paraguay",
"Foto":[
{
"idBranchPhoto": 4,
"idBranchRestaurant": 1,
"gren": null,
"idUser": 0,
"användare": null,
"foto": "entradaDonJulio.jpg"
}
],
"kök":[
{
"idCousine": 1,
"name": "Parrilla"
}
],
"meny":[
{
"idTypeMenu": 1,
"name": "Mediodia",
"idBranchRestaurant": 1,
"tallrikar": null
},
{
"idTypeMenu": 2,
"name": "Noche",
"idBranchRestaurant": 1,
"tallrikar": null
}
],
"filtrera":[
{
"idTypeFilter": 2,
"name": "Family",
"icon": "family_ic.jpg"
}
],
"service":[
{
"idService": 2,
"name": "Comida para celiacos"
},
{
"idService": 1,
"name": "Wifi"
}
],
"tidtabell":[
{
"idTimetableBranch": 11,
"idBranchRestaurant": 1,
"idDay": 2,
"openingHour": "19 hs",
"closedHour": "24 hs",
"dag":{
"idDay": 2,
"name": "Tisdag"
}
},
{
"idTimetableBranch": 10,
"idBranchRestaurant": 1,
"idDay": 2,
"openingHour": "12 hs",
"closedHour": "16 hs",
"dag":{
"idDay": 2,
"name": "Tisdag"
}
},
{
"idTimetableBranch": 9,
"idBranchRestaurant": 1,
"idDay": 1,
"openingHour": "19 hs",
"closedHour": "24 hs",
"dag":{
"idDay": 1,
"name": "Måndag"
}
},
{
"idTimetableBranch": 8,
"idBranchRestaurant": 1,
"idDay": 1,
"openingHour": "12 hs",
"closedHour": "16 hs",
"dag":{
"idDay": 1,
"name": "Måndag"
}
},
{
"idTimetableBranch": 12,
"idBranchRestaurant": 1,
"idDay": 3,
"openingHour": "12 hs",
"closedHour": "16 hs",
"dag":{
"idDay": 3,
"name": "Onsdag"
}
},
{
"idTimetableBranch": 13,
"idBranchRestaurant": 1,
"idDay": 3,
"openingHour": "19 hs",
"closedHour": "24 hs",
"dag":{
"idDay": 3,
"name": "Onsdag"
}
},
{
"idTimetableBranch": 14,
"idBranchRestaurant": 1,
"idDay": 4,
"openingHour": "12 hs",
"closedHour": "16 hs",
"dag":{
"idDay": 4,
"name": "torsdag"
}
},
{
"idTimetableBranch": 15,
"idBranchRestaurant": 1,
"idDay": 4,
"openingHour": "19 hs",
"closedHour": "24 hs",
"dag":{
"idDay": 4,
"name": "torsdag"
}
},
{
"idTimetableBranch": 16,
"idBranchRestaurant": 1,
"idDay": 5,
"openingHour": "12 hs",
"closedHour": "16 hs",
"dag":{
"idDay": 5,
"name": "Fredag"
}
},
{
"idTimetableBranch": 17,
"idBranchRestaurant": 1,
"idDay": 5,
"openingHour": "19 hs",
"closedHour": "2 hs",
"dag":{
"idDay": 5,
"name": "Fredag"
}
}
],
"latitude": "87654322",
"longitude": "23456789",
"calification": null,
"genomsnittlig mat": 4,0,
"averageService": 4.0,
"averageAmbience": 4.0,
"averageCalification": 4.0,
"befordran":[
{
"idPromotion": 3,
"idTypePromotion": 2,
"code": "DIADELPADRE",
"name": "Dia Del Padre Regalo",
"startDate": "2017-06-26T00: 00: 00",
"expireDate": "2017-06-18T00: 00: 00",
"description": "postre de regalo",
"värde": 100,
"typ":{
"idTypePromotion": 2,
"name": "Present"
}
}
]
},
{
"idBranchRestaurant": 2,
"idRestaurant": 2,
"restaurang":{
"idRestaurant": 2,
"name": "La Hormiga",
"beskrivning": "el lugar explota de gente y en especial de gente de ort",
"socialt nätverk":[
{
"idSocialNetworkRestaurant": 2,
"idRestaurant": 2,
"idTypeSocialNetwork": 2,
"värde": "www.facebook.com/LaHormiga",
"typ":{
"idTypeSocialNetwork": 2,
"name": "Facebook",
"icon": "fb_ic.jpg"
}
}
]
},
"idRangePriceBranch": 1,
"RangePrice": {
"idRangePriceBranch": 1,
"idBranchRestaurant": 1,
"minimum": 300,
"maximalt": 600
},
"name": "Ort",
"Foto":[
{
"idBranchPhoto": 5,
"idBranchRestaurant": 2,
"gren": null,
"idUser": 0,
"användare": null,
"foto": "entradaLaHormiga.jpg"
}
],
"kök":[
{
"idCousine": 2,
"name": "Pizza"
}
],
"meny":[
{
"idTypeMenu": 3,
"name": "Mediodia",
"idBranchRestaurant": 2,
"tallrikar": null
}
],
"filtrera":[
{
"idTypeFilter": 1,
"name": "Med rabatt",
"icon": "discount_ic.jpg"
}
],
"service":[
{
"idService": 3,
"name": "Aire acondicionado"
},
{
"idService": 1,
"name": "Wifi"
}
],
"tidtabell":[
{
"idTimetableBranch": 18,
"idBranchRestaurant": 2,
"idDay": 6,
"openingHour": "11 hs",
"closedHour": "15 hs",
"dag":{
"idDay": 6,
"name": "Saturday"
}
},
{
"idTimetableBranch": 19,
"idBranchRestaurant": 2,
"idDay": 7,
"openingHour": "11 hs",
"closedHour": "15 hs",
"dag":{
"idDay": 7,
"name": "Söndag"
}
}
],
"latitude": "234567897",
"longitude": "123456789",
"calification": null,
"genomsnittlig mat": 5,0,
"averageService": 5.0,
"averageAmbience": 5.0,
"averageCalification": 5.0,
"befordran":[
]
},
{
"idBranchRestaurant": 3,
"idRestaurant": 3,
"restaurang":{
"idRestaurant": 3,
"name": "paja rota",
"beskrivning": "La mejor parrilla de ramosmejia ",
"socialt nätverk":[
{
"idSocialNetworkRestaurant": 3,
"idRestaurant": 3,
"idTypeSocialNetwork": 3,
"värde": "twitter.com/Pajarota",
"typ":{
"idTypeSocialNetwork": 3,
"name": "Twitter",
"icon": "ic_twitter.png"
}
}
]
},
"idRangePriceBranch": 3,
"RangePrice": {
"idRangePriceBranch": 3,
"idBranchRestaurant": 3,
"minimum": 50,
"maximalt": 250
},
"name": "Ramos MEjia",
"Foto":[
{
"idBranchPhoto": 6,
"idBranchRestaurant": 3,
"gren": null,
"idUser": 0,
"användare": null,
"foto": "EntradaPajaRota.jpg"
}
],
"kök":[
{
"idCousine": 1,
"name": "Parrilla"
}
],
"meny":[
{
"idTypeMenu": 4,
"name": "Mediodia",
"idBranchRestaurant": 3,
"tallrikar": null
},
{
"idTypeMenu": 5,
"name": "Noche",
"idBranchRestaurant": 3,
"tallrikar": null
}
],
"filtrera":[
{
"idTypeFilter": 2,
"name": "Family",
"icon": "family_ic.jpg"
}
],
"service":[
{
"idService": 1,
"name": "Wifi"
},
{
"idService": 4,
"name": "Carta de braille"
}
],
"tidtabell":[
{
"idTimetableBranch": 20,
"idBranchRestaurant": 3,
"idDay": 5,
"openingHour": "12 hs",
"closedHour": "16 hs",
"dag":{
"idDay": 5,
"name": "Fredag"
}
},
{
"idTimetableBranch": 21,
"idBranchRestaurant": 3,
"idDay": 5,
"openingHour": "19 hs",
"closedHour": "2 hs",
"dag":{
"idDay": 5,
"name": "Fredag"
}
},
{
"idTimetableBranch": 22,
"idBranchRestaurant": 3,
"idDay": 6,
"openingHour": "12 hs",
"closedHour": "16 hs",
"dag":{
"idDay": 6,
"name": "Saturday"
}
},
{
"idTimetableBranch": 23,
"idBranchRestaurant": 3,
"idDay": 6,
"openingHour": "19 hs",
"closedHour": "2 hs",
"dag":{
"idDay": 6,
"name": "Saturday"
}
},
{
"idTimetableBranch": 24,
"idBranchRestaurant": 3,
"idDay": 7,
"openingHour": "12 hs",
"closedHour": "16 hs",
"dag":{
"idDay": 7,
"name": "Söndag"
}
}
],
"latitude": "12345678",
"longitud": "87654321",
"calification": null,
"genomsnittlig mat": 5,0,
"averageService": 5.0,
"averageAmbience": 5.0,
"averageCalification": 5.0,
"befordran":[
]
},
{
"idBranchRestaurant": 4,
"idRestaurant": 4,
"restaurang":{
"idRestaurant": 4,
"name": "la espiga",
"description": "el mejor lugar para comer pastas",
"socialt nätverk":[
{
"idSocialNetworkRestaurant": 4,
"idRestaurant": 4,
"idTypeSocialNetwork": 4,
"värde": "instagram.com/laespiga",
"typ":{
"idTypeSocialNetwork": 4,
"name": "Instagram",
"icon": "ic_Instagram.png"
}
}
]
},
"idRangePriceBranch": 4,
"RangePrice": {
"idRangePriceBranch": 4,
"idBranchRestaurant": 4,
"minimum": 80,
"maximalt": 150
},
"name": "Almagro",
"Foto":[
{
"idBranchPhoto": 7,
"idBranchRestaurant": 4,
"gren": null,
"idUser": 0,
"användare": null,
"foto": "EntradaLaEspiga.jpg"
}
],
"kök":[
{
"idCousine": 4,
"name": "Pasta"
}
],
"meny":[
{
"idTypeMenu": 6,
"name": "Tarde",
"idBranchRestaurant": 4,
"tallrikar": null
}
],
"filtrera":[
{
"idTypeFilter": 1,
"name": "Med rabatt",
"icon": "discount_ic.jpg"
}
],
"service":[
{
"idService": 1,
"name": "Wifi"
},
{
"idService": 3,
"name": "Aire acondicionado"
}
],
"tidtabell":[
{
"idTimetableBranch": 26,
"idBranchRestaurant": 4,
"idDay": 1,
"openingHour": "16 hs",
"closedHour": "19 hs",
"dag":{
"idDay": 1,
"name": "Måndag"
}
},
{
"idTimetableBranch": 27,
"idBranchRestaurant": 4,
"idDay": 2,
"openingHour": "16 hs",
"closedHour": "19 hs",
"dag":{
"idDay": 2,
"name": "Tisdag"
}
},
{
"idTimetableBranch": 28,
"idBranchRestaurant": 4,
"idDay": 3,
"openingHour": "16 hs",
"closedHour": "19 hs",
"dag":{
"idDay": 3,
"name": "Onsdag"
}
},
{
"idTimetableBranch": 29,
"idBranchRestaurant": 4,
"idDay": 4,
"openingHour": "16 hs",
"closedHour": "19 hs",
"dag":{
"idDay": 4,
"name": "torsdag"
}
},
{
"idTimetableBranch": 30,
"idBranchRestaurant": 4,
"idDay": 5,
"openingHour": "16 hs",
"closedHour": "19 hs",
"dag":{
"idDay": 5,
"name": "Fredag"
}
}
],
"latitude": "87657467",
"longitude": "45254567",
"calification": null,
"genomsnittlig mat": 5,0,
"averageService": 5.0,
"averageAmbience": 5.0,
"averageCalification": 5.0,
"befordran":[
]
}
]
ParseQuery-klass
privat strängserver = "http://appmorfando.azurewebsites.net/api/";
ParsingObjects analysera = nya ParsingObjects ();
// Fråga för listgrenar
privata ArrayList  filialer = nya ArrayList  ();
public ArrayList  getAllBranch (int limit, int offset) {
new BranchGetAll (). execute ("branch /", limit + "", offset + "");
returfilialer;
}
privat klass BranchGetAll utökar AsyncTask > {
skyddat tomrum onPostExecute (ArrayList  dator) {
super.onPostExecute (datos);
grenar = dator;
}
@Åsidosätta
skyddad ArrayList  doInBackground (String ... parametros) {
Sträng url = parametros [0] + parametros [1] + "/" + parametros [2];
ArrayList  branchList = ny ArrayList  ();
OkHttpClient-klient = ny OkHttpClient ();
Begär begäran = ny Request.Builder ()
.url (server + url)
.bygga();
Strängresultat;
Prova {
Svarssvar = client.newCall (begäran) .execute (); // Llamo al API Rest servicio1 en ejemplo.com
resultado = respons.body (). sträng ();
} fånga (IOException e) {
Log.d ("Fel", e.getMessage ()); // Error de Network
returnera null;
}
Prova{
JSONArray jsonBranch = ny JSONArray (resultado);
för (int i = 0; i  listBranches;
public View onCreateView (LayoutInflater inflater, ViewGroup group, Bundle data) {
Visa för att återvända;
toReturn = inflater.inflate (R.layout.frag_restaurant_lv, group, false);
main = (MainActivity) getActivity ();
pq = ny ParseQuery ();
restaurantItems = (ListView) toReturn.findViewById (R.id.lvRestaurantItems);
// Här blir noll så att adapterstorleken är 0
listBranches = pq.getAllBranch (10,0);
adapter = ny lvRestaurantAdapter (listBranches, main);
restaurantItems.setAdapter (adapter);
restaurantItems.setOnItemClickListener (detta);
gå tillbaka till Retur;
}
@Åsidosätta
offentligt ogiltigt onItemClick (AdapterView  förälder, Visa vy, int position, långt id) {
int idBranch = adapter.getId (position);
main.BranchSelected (idBranch);
}
}