enter code here
    HashMap<String, String> map = new HashMap<>();
    map.put("", Variable Name);
    map.put("", Variable Name);

    TechnicianID.add("0");
    Technician.add("Select Technician");

    appDialogs.showProgressDialog();
    callAPiActivity.doPost((Activity) mContext, map, "URL, new GetApiResult() {
        @Override
        public void onSuccesResult(JSONObject result) throws JSONException {
            appDialogs.hideProgressDialog();
            JSONArray techArray = result.getJSONArray("data");
            for (int i = 0; i < techArray.length(); i++) {
                JSONObject techObj = techArray.getJSONObject(i);
                TechnicianID.add(techObj.getString("u_id"));
                Technician.add(techObj.getString("first_name"));
            }

            TechnicianAdapter = new ArrayAdapter(mContext, R.layout.simple_spinner_item, Technician);
            TechnicianAdapter.setDropDownViewResource(android.R.layout.simple_list_item_1);
            spinnerTechnician.setAdapter(TechnicianAdapter);

        }

        @Override
        public void onFailureResult(String messgae) throws JSONException {
            appDialogs.hideProgressDialog();
            appDialogs.setErrorToast(messgae);
        }

        @Override
        public void onNetworkRetry(String messgae) throws JSONException {

        }

    });
}