Transition between activity

There is 2 activation code, they are the same with 1, but in the first spinner , and in the second ListView , and so in the first I have 1 Json in the spinner , I need to, when I click on an object in the spinner , the parsit is already out of 2 activations, but in ListView .

 public class MainActivity2 extends AppCompatActivity { private String TAG = MainActivity2.class.getSimpleName(); private ProgressDialog pDialog; private Spinner spinner; // URL to get contacts JSON private static String url = "Тут URL первого Json"; ArrayList<HashMap<String, String>> contactList; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); contactList = new ArrayList<>(); spinner = (Spinner) findViewById(R.id.spinner); new GetContacts().execute(); } /** * Async task class to get json by making HTTP call */ private class GetContacts extends AsyncTask<Void, Void, Void> { @Override protected void onPreExecute() { super.onPreExecute(); // Showing progress dialog pDialog = new ProgressDialog(MainActivity2.this); pDialog.setMessage("Please wait..."); pDialog.setCancelable(false); pDialog.show(); } @Override protected Void doInBackground(Void... arg0) { HttpHandler sh = new HttpHandler(); // Making a request to url and getting response String jsonStr = sh.makeServiceCall(url); Log.e(TAG, "Response from url: " + jsonStr); if (jsonStr != null) { try { JSONObject jsonObj = new JSONObject(jsonStr); // Getting JSON Array node JSONArray data = jsonObj.getJSONArray("data"); // looping through All Contacts for (int i = 0; i < data.length(); i++) { JSONObject c = data.getJSONObject(i); String id = c.getString("id"); String ip = c.getString("ip"); String link = c.getString("link"); // tmp hash map for single contact HashMap<String, String> contact = new HashMap<>(); // adding each child node to HashMap key => value contact.put("id", id); contact.put("ip", ip); contact.put("link", link); // adding contact to contact list contactList.add(contact); } } catch (final JSONException e) { Log.e(TAG, "Json parsing error: " + e.getMessage()); runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(getApplicationContext(), "Json parsing error: " + e.getMessage(), Toast.LENGTH_LONG) .show(); } }); } } else { Log.e(TAG, "Couldn't get json from server."); runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(getApplicationContext(), "Couldn't get json from server. Check LogCat for possible errors!", Toast.LENGTH_LONG) .show(); } }); } return null; } @Override protected void onPostExecute(Void result) { super.onPostExecute(result); // Dismiss the progress dialog if (pDialog.isShowing()) pDialog.dismiss(); /** * Updating parsed JSON data into ListView * */ ListAdapter adapter = new SimpleAdapter( MainActivity2.this, contactList, R.layout.list_item, new String[]{"ip", "link",}, new int[]{R.id.name, R.id.link}); spinner.setAdapter((SpinnerAdapter) adapter); } } }