private void spinnerapi(){
    sprCoun = (Spinner) findViewById(R.id.spinner);
    RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
    String serverURL = "server url";
    final StringRequest getRequest = new StringRequest(Request.Method.POST, serverURL,
            new com.android.volley.Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    Log.d("officerResponse", response);
                    try {
                        JSONObject jsonObject = new JSONObject(response);
                        String str_status = jsonObject.getString("status");
                        String str_message = jsonObject.getString("message");

                        JSONArray jsonArray = jsonObject.getJSONArray("data");
                        for (int i = 0; i < jsonArray.length(); i++) {
                            JSONObject jsonObjectGuest = jsonArray.getJSONObject(i);
                            city_name = jsonObjectGuest.getString("cityname");
                            city_id = jsonObjectGuest.getString("cityid");



                            listarraylist.add(new CityModel(city_name));
                        }
                        sprCoun.setAdapter(new ArrayAdapter<String>
                                (RegistrationActivity.this, android.R.layout.simple_spinner_dropdown_item, list));



                    } catch (JSONException e) {
                        e.printStackTrace();
                        Toast.makeText(getApplicationContext(), "" + e, Toast.LENGTH_LONG).show();
                    }
                }
            },
            new com.android.volley.Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    // error
                    // Toast.makeText(context, "" + error, Toast.LENGTH_LONG).show();
                    Log.d("tyghj", String.valueOf(error));

                }
            }
    ) {
        @Override
        protected Map<String, String> getParams() {
            Map<String, String> params = new HashMap<String, String>();


            return params;
        }
    };
    queue.add(getRequest);

}