Getting a null Array from a method - arrays

Question

I've created a method that shall return a two-dimensional Array, everything works perfectly as the array is being correctly filled in the method's try.
But once I display the array on onCreate(), it's returning null.
public class ListTickets extends AppCompatActivity {
public String[][] ticketTab ;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list_tickets);
ticketTab = new String[Integer.valueOf(nbTicket)][nbTicketTab];
DisplayArray(getTicketsHTTP());
}
private String[][] getTicketsHTTP() {
final JsonObjectRequest getRequest = new JsonObjectRequest(Request.Method.GET, URL, null,
new Response.Listener<JSONObject>()
{
#Override
public void onResponse(JSONObject response) {
try {
JSONArray Jdata = response.getJSONArray("data");
for (int i=0; i < Jdata.length(); i++) {
try {
JSONObject oneTicket = Jdata.getJSONObject(i);
titreTicket = oneTicket.getString("1");
slaTicket = oneTicket.getString("30");
dateDebutTicket = oneTicket.getString("15");
urgenceTicket = oneTicket.getString("10");
statutTicket = oneTicket.getString("12");
idTicket = oneTicket.getString("2");
} catch (JSONException e) {
Log.e("Err", e.getMessage());
}
ticketTab[i][0] = titreTicket;
ticketTab[i][1] = slaTicket;
ticketTab[i][2] = dateDebutTicket;
ticketTab[i][3] = urgenceText(urgenceTicket);
ticketTab[i][4] = calculTempsRestant(dateDebutTicket, slaTicket, dateEchanceTicket);
ticketTab[i][5] = String.valueOf(ticketEnretard);
ticketTab[i][6] = statutTicket;
ticketTab[i][7] = idTicket;
}
} catch (JSONException e) {
e.printStackTrace();
}
}
},
new Response.ErrorListener()
{
#Override
public void onErrorResponse(VolleyError error) {
Log.e("Error.Response", error.toString());
}
}
){
#Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> params = new HashMap<String, String>();
params.put("App-Token",FirstEverActivity.App_Token);
params.put("Session-Token",session_token);
return params;
}
};
// add it to the RequestQueue
queue.add(getRequest);
return ticketTab;
}
}
I declared ticketTab outside the onCreate because when I declare it inside the method, I cannot change it inside the try.
How can I return the array correctly?

Answer 1

In your onCreate you are using this line:
ticketTab = new String[Integer.valueOf(nbTicket)][nbTicketTab];
and those values, nbTicket and nbTicketTab are not declared anywhere in your code, maybe that's why they are returning null, you have to initialize them and asign values.