Llame a AsyncTask desde otra clase y devuelva nulo Android Studio

Estoy tratando de llamar a AsyncTask a través de un método de ParseQuerys Class para usar esa información en un ListView de mi Fragment lvRestaurantFrag. El problema es que el método devuelve nulo porque AsyncTask no llega a onPostExecute. No sé cómo puedo solucionarlo.
Aquí les dejo mi código:
JSON
Enlace API
[
{
"idBranchRestaurant": 1,
"idRestaurant": 1,
"restaurante":{
"idRestaurant": 1,
"nombre": "Don Julio",
"description": "La mejor parrilla para cualquier turista",
"red social":[
{
"idSocialNetworkRestaurant": 1,
"idRestaurant": 1,
"idTypeSocialNetwork": 1,
"valor": "www.donjulio.com.ar",
"escribe":{
"idTypeSocialNetwork": 1,
"nombre": "Sitio web",
"icon": "website_ic.jpg"
}
}
]
},
"idRangePriceBranch": 1,
"RangePrice": {
"idRangePriceBranch": 1,
"idBranchRestaurant": 1,
"mínimo": 300,
"máximo": 600
},
"nombre": "Paraguay",
"Foto":[
{
"idBranchPhoto": 4,
"idBranchRestaurant": 1,
"rama": nulo,
"idUser": 0,
"usuario": nulo,
"foto": "entradaDonJulio.jpg"
}
],
"cocina":[
{
"idCousine": 1,
"nombre": "Parrilla"
}
],
"menú":[
{
"idTypeMenu": 1,
"nombre": "Mediodía",
"idBranchRestaurant": 1,
"platos": nulo
},
{
"idTypeMenu": 2,
"nombre": "Noche",
"idBranchRestaurant": 1,
"platos": nulo
}
],
"filtrar":[
{
"idTypeFilter": 2,
"nombre": "Familia",
"icon": "family_ic.jpg"
}
],
"Servicio":[
{
"idService": 2,
"name": "Comida para celiacos"
},
{
"idService": 1,
"nombre": "Wifi"
}
],
"calendario":[
{
"idTimetableBranch": 11,
"idBranchRestaurant": 1,
"idDay": 2,
"openingHour": "19 hs",
"closedHour": "24 hs",
"día":{
"idDay": 2,
"name": "martes"
}
},
{
"idTimetableBranch": 10,
"idBranchRestaurant": 1,
"idDay": 2,
"openingHour": "12 hs",
"closedHour": "16 hs",
"día":{
"idDay": 2,
"name": "martes"
}
},
{
"idTimetableBranch": 9,
"idBranchRestaurant": 1,
"idDay": 1,
"openingHour": "19 hs",
"closedHour": "24 hs",
"día":{
"idDay": 1,
"name": "Lunes"
}
},
{
"idTimetableBranch": 8,
"idBranchRestaurant": 1,
"idDay": 1,
"openingHour": "12 hs",
"closedHour": "16 hs",
"día":{
"idDay": 1,
"name": "Lunes"
}
},
{
"idTimetableBranch": 12,
"idBranchRestaurant": 1,
"idDay": 3,
"openingHour": "12 hs",
"closedHour": "16 hs",
"día":{
"idDay": 3,
"name": "miércoles"
}
},
{
"idTimetableBranch": 13,
"idBranchRestaurant": 1,
"idDay": 3,
"openingHour": "19 hs",
"closedHour": "24 hs",
"día":{
"idDay": 3,
"name": "miércoles"
}
},
{
"idTimetableBranch": 14,
"idBranchRestaurant": 1,
"idDay": 4,
"openingHour": "12 hs",
"closedHour": "16 hs",
"día":{
"idDay": 4,
"name": "jueves"
}
},
{
"idTimetableBranch": 15,
"idBranchRestaurant": 1,
"idDay": 4,
"openingHour": "19 hs",
"closedHour": "24 hs",
"día":{
"idDay": 4,
"name": "jueves"
}
},
{
"idTimetableBranch": 16,
"idBranchRestaurant": 1,
"idDay": 5,
"openingHour": "12 hs",
"closedHour": "16 hs",
"día":{
"idDay": 5,
"name": "Viernes"
}
},
{
"idTimetableBranch": 17,
"idBranchRestaurant": 1,
"idDay": 5,
"openingHour": "19 hs",
"closedHour": "2 hs",
"día":{
"idDay": 5,
"name": "Viernes"
}
}
],
"latitud": "87654322",
"longitud": "23456789",
"calification": nulo,
"averageFood": 4.0,
"averageService": 4.0,
"averageAmbience": 4.0,
"averageCalification": 4.0,
"promoción":[
{
"idPromotion": 3,
"idTypePromotion": 2,
"código": "DIADELPADRE",
"name": "Dia Del Padre Regalo",
"startDate": "2017-06-26T00: 00: 00",
"expireDate": "2017-06-18T00: 00: 00",
"description": "postre de regalo",
"valor": 100,
"escribe":{
"idTypePromotion": 2,
"nombre": "Regalo"
}
}
]
},
{
"idBranchRestaurant": 2,
"idRestaurant": 2,
"restaurante":{
"idRestaurant": 2,
"nombre": "La Hormiga",
"description": "el lugar explota de gente y en especial de gente de ort",
"red social":[
{
"idSocialNetworkRestaurant": 2,
"idRestaurant": 2,
"idTypeSocialNetwork": 2,
"valor": "www.facebook.com/LaHormiga",
"escribe":{
"idTypeSocialNetwork": 2,
"nombre": "Facebook",
"icono": "fb_ic.jpg"
}
}
]
},
"idRangePriceBranch": 1,
"RangePrice": {
"idRangePriceBranch": 1,
"idBranchRestaurant": 1,
"mínimo": 300,
"máximo": 600
},
"nombre": "Ort",
"Foto":[
{
"idBranchPhoto": 5,
"idBranchRestaurant": 2,
"rama": nulo,
"idUser": 0,
"usuario": nulo,
"foto": "entradaLaHormiga.jpg"
}
],
"cocina":[
{
"idCousine": 2,
"name": "Pizza"
}
],
"menú":[
{
"idTypeMenu": 3,
"nombre": "Mediodía",
"idBranchRestaurant": 2,
"platos": nulo
}
],
"filtrar":[
{
"idTypeFilter": 1,
"name": "Con descuento",
"icon": "discount_ic.jpg"
}
],
"Servicio":[
{
"idService": 3,
"nombre": "Aire acondicionado"
},
{
"idService": 1,
"nombre": "Wifi"
}
],
"calendario":[
{
"idTimetableBranch": 18,
"idBranchRestaurant": 2,
"idDay": 6,
"openingHour": "11 hs",
"closedHour": "15 hs",
"día":{
"idDay": 6,
"name": "sábado"
}
},
{
"idTimetableBranch": 19,
"idBranchRestaurant": 2,
"idDay": 7,
"openingHour": "11 hs",
"closedHour": "15 hs",
"día":{
"idDay": 7,
"name": "Domingo"
}
}
],
"latitud": "234567897",
"longitud": "123456789",
"calification": nulo,
"comida media": 5,0,
"averageService": 5.0,
"averageAmbience": 5.0,
"averageCalification": 5.0,
"promoción":[
]
},
{
"idBranchRestaurant": 3,
"idRestaurant": 3,
"restaurante":{
"idRestaurant": 3,
"nombre": "paja rota",
"description": "La mejor parrilla de ramosmejia ",
"red social":[
{
"idSocialNetworkRestaurant": 3,
"idRestaurant": 3,
"idTypeSocialNetwork": 3,
"valor": "twitter.com/Pajarota",
"escribe":{
"idTypeSocialNetwork": 3,
"nombre": "Twitter",
"icono": "ic_twitter.png"
}
}
]
},
"idRangePriceBranch": 3,
"RangePrice": {
"idRangePriceBranch": 3,
"idBranchRestaurant": 3,
"mínimo": 50,
"máximo": 250
},
"nombre": "Ramos MEjia",
"Foto":[
{
"idBranchPhoto": 6,
"idBranchRestaurant": 3,
"rama": nulo,
"idUser": 0,
"usuario": nulo,
"foto": "EntradaPajaRota.jpg"
}
],
"cocina":[
{
"idCousine": 1,
"nombre": "Parrilla"
}
],
"menú":[
{
"idTypeMenu": 4,
"nombre": "Mediodía",
"idBranchRestaurant": 3,
"platos": nulo
},
{
"idTypeMenu": 5,
"nombre": "Noche",
"idBranchRestaurant": 3,
"platos": nulo
}
],
"filtrar":[
{
"idTypeFilter": 2,
"nombre": "Familia",
"icon": "family_ic.jpg"
}
],
"Servicio":[
{
"idService": 1,
"nombre": "Wifi"
},
{
"idService": 4,
"nombre": "Carta de braille"
}
],
"calendario":[
{
"idTimetableBranch": 20,
"idBranchRestaurant": 3,
"idDay": 5,
"openingHour": "12 hs",
"closedHour": "16 hs",
"día":{
"idDay": 5,
"name": "Viernes"
}
},
{
"idTimetableBranch": 21,
"idBranchRestaurant": 3,
"idDay": 5,
"openingHour": "19 hs",
"closedHour": "2 hs",
"día":{
"idDay": 5,
"name": "Viernes"
}
},
{
"idTimetableBranch": 22,
"idBranchRestaurant": 3,
"idDay": 6,
"openingHour": "12 hs",
"closedHour": "16 hs",
"día":{
"idDay": 6,
"name": "sábado"
}
},
{
"idTimetableBranch": 23,
"idBranchRestaurant": 3,
"idDay": 6,
"openingHour": "19 hs",
"closedHour": "2 hs",
"día":{
"idDay": 6,
"name": "sábado"
}
},
{
"idTimetableBranch": 24,
"idBranchRestaurant": 3,
"idDay": 7,
"openingHour": "12 hs",
"closedHour": "16 hs",
"día":{
"idDay": 7,
"name": "Domingo"
}
}
],
"latitud": "12345678",
"longitud": "87654321",
"calification": nulo,
"comida media": 5,0,
"averageService": 5.0,
"averageAmbience": 5.0,
"averageCalification": 5.0,
"promoción":[
]
},
{
"idBranchRestaurant": 4,
"idRestaurant": 4,
"restaurante":{
"idRestaurant": 4,
"nombre": "la espiga",
"description": "el mejor lugar para comer pastas",
"red social":[
{
"idSocialNetworkRestaurant": 4,
"idRestaurant": 4,
"idTypeSocialNetwork": 4,
"valor": "instagram.com/laespiga",
"escribe":{
"idTypeSocialNetwork": 4,
"nombre": "Instagram",
"icon": "ic_Instagram.png"
}
}
]
},
"idRangePriceBranch": 4,
"RangePrice": {
"idRangePriceBranch": 4,
"idBranchRestaurant": 4,
"mínimo": 80,
"máximo": 150
},
"nombre": "Almagro",
"Foto":[
{
"idBranchPhoto": 7,
"idBranchRestaurant": 4,
"rama": nulo,
"idUser": 0,
"usuario": nulo,
"foto": "EntradaLaEspiga.jpg"
}
],
"cocina":[
{
"idCousine": 4,
"name": "Pasta"
}
],
"menú":[
{
"idTypeMenu": 6,
"nombre": "Tarde",
"idBranchRestaurant": 4,
"platos": nulo
}
],
"filtrar":[
{
"idTypeFilter": 1,
"name": "Con descuento",
"icon": "discount_ic.jpg"
}
],
"Servicio":[
{
"idService": 1,
"nombre": "Wifi"
},
{
"idService": 3,
"nombre": "Aire acondicionado"
}
],
"calendario":[
{
"idTimetableBranch": 26,
"idBranchRestaurant": 4,
"idDay": 1,
"openingHour": "16 hs",
"closedHour": "19 hs",
"día":{
"idDay": 1,
"name": "Lunes"
}
},
{
"idTimetableBranch": 27,
"idBranchRestaurant": 4,
"idDay": 2,
"openingHour": "16 hs",
"closedHour": "19 hs",
"día":{
"idDay": 2,
"name": "martes"
}
},
{
"idTimetableBranch": 28,
"idBranchRestaurant": 4,
"idDay": 3,
"openingHour": "16 hs",
"closedHour": "19 hs",
"día":{
"idDay": 3,
"name": "miércoles"
}
},
{
"idTimetableBranch": 29,
"idBranchRestaurant": 4,
"idDay": 4,
"openingHour": "16 hs",
"closedHour": "19 hs",
"día":{
"idDay": 4,
"name": "jueves"
}
},
{
"idTimetableBranch": 30,
"idBranchRestaurant": 4,
"idDay": 5,
"openingHour": "16 hs",
"closedHour": "19 hs",
"día":{
"idDay": 5,
"name": "Viernes"
}
}
],
"latitud": "87657467",
"longitud": "45254567",
"calification": nulo,
"comida media": 5,0,
"averageService": 5.0,
"averageAmbience": 5.0,
"averageCalification": 5.0,
"promoción":[
]
}
]
Clase ParseQuery
servidor de cadenas privado = "http://appmorfando.azurewebsites.net/api/";
ParsingObjects parse = new ParsingObjects ();
// Consulta de ramas de lista
ramas de ArrayList  privadas = new ArrayList  ();
public ArrayList  getAllBranch (int limit, int offset) {
new BranchGetAll (). execute ("rama /", límite + "", desplazamiento + "");
devolver ramas;
}
la clase privada BranchGetAll extiende AsyncTask > {
protected void onPostExecute (ArrayList  datos) {
super.onPostExecute (datos);
sucursales = datos;
}
@Anular
protected ArrayList  doInBackground (String ... parametros) {
String url = parametros [0] + parametros [1] + "/" + parametros [2];
ArrayList  branchList = new ArrayList  ();
Cliente OkHttpClient = nuevo OkHttpClient ();
Solicitar solicitud = nuevo Request.Builder ()
.url (servidor + url)
.construir();
Resultado de cadena;
tratar {
Respuesta respuesta = client.newCall (request) .execute (); // Llamo al API Rest servicio1 en ejemplo.com
resultado = respuesta.cuerpo (). cadena ();
} captura (IOException e) {
Log.d ("Error", e.getMessage ()); // Error de red
devolver nulo;
}
tratar{
JSONArray jsonBranch = new JSONArray (resultado);
para (int i = 0; i  listBranches;
Public View onCreateView (Inflador LayoutInflater, grupo ViewGroup, datos del paquete) {
Ver toReturn;
toReturn = inflater.inflate (R.layout.frag_restaurant_lv, grupo, falso);
main = (MainActivity) getActivity ();
pq = nuevo ParseQuery ();
restaurantItems = (ListView) toReturn.findViewById (R.id.lvRestaurantItems);
// Aquí se pone nulo, por lo que el tamaño del adaptador es 0
listBranches = pq.getAllBranch (10,0);
adapter = new lvRestaurantAdapter (listBranches, principal);
restaurantItems.setAdapter (adaptador);
restaurantItems.setOnItemClickListener (esto);
volver a Volver;
}
@Anular
public void onItemClick (AdapterView  parent, View view, int position, long id) {
int idBranch = adapter.getId (posición);
main.BranchSelected (idBranch);
}
}