Gson Example (JSON to Object)

gson_example.java

    /*
    
    compile 'com.android.volley:volley:1.0.0'
    compile 'com.google.code.gson:gson:2.2.4'
    compile 'com.squareup.retrofit2:retrofit:2.3.0'
    
    */
    
        public void sendRequest(View view) {
        RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
        String url = "https://pteachertest.herokuapp.com/json/";
        final ListView listView = (ListView) findViewById(R.id.listView);

        JsonArrayRequest request = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
            @Override
            public void onResponse(JSONArray jsonArray) {
                try {
                    for (int i = 0; i < jsonArray.length(); i++) {
                        JSONObject jsonObject = (JSONObject) jsonArray.get(i);
                        Player player = gson.fromJson(jsonObject.toString(), Player.class);
                        players.add(player);
                    }
                    ArrayList<String> playerName = new ArrayList<>();

                    for (int i = 0; i < players.size(); i++) {
                        if (players.get(i).name != null)
                            playerName.add(players.get(i).name);
                    }

                    ArrayAdapter<String> adapter = new ArrayAdapter<>(getApplicationContext(),
                            android.R.layout.simple_list_item_1, playerName);
                    listView.setAdapter(adapter);
                }
                catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {
                textView.setText(volleyError.getMessage());
            }
        }
        );
        queue.add(request);
    }