REST-Client mit Volley

donwloadDummyData

    private void downloadDummyData() {
        final String URL = "http://vm15.htl-leonding.ac.at:8080/DummyDataGenerator/rs/person/20";

        JsonArrayRequest jsonRequest = new JsonArrayRequest(
                URL,
                new Response.Listener<JSONArray>() {
                    @Override
                    public void onResponse(JSONArray response) {
                        Log.d(TAG, response.toString());

                        //MainActivity.personList = parseJsonArrayPersons(response);
                        try {
                            for (int i = 0; i < response.length(); i++) {
                                JSONObject person = (JSONObject) response.get(i);

                                int id = MainActivity.personList.size() + 1;
                                String firstName = person.getString("firstName");
                                String lastName = person.getString("lastName");
                                int zipcode = person.getInt("zipCode");
                                String city = person.getString("city");

                                MainActivity.personList.add(new Person(id, firstName, lastName, zipcode, city));

                                personAdapter.notifyDataSetChanged();
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                            Toast.makeText(getActivity(),
                                    "Error: " + e.getMessage(),
                                    Toast.LENGTH_SHORT).show();
                        }
                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                error.printStackTrace();
                VolleyLog.d(TAG, "Error: " + error.getMessage());
                Toast.makeText(getActivity(),
                        error.getMessage(),
                        Toast.LENGTH_SHORT).show();
            }
        });

        Volley.newRequestQueue(getActivity()).add(jsonRequest);
    }