public class GetTime extends AsyncTask<Void, Void, Void> {

    public Context context;

    public GetTime(Context context) {
        this.context = context;
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected Void doInBackground(Void... arg0) {

        HttpClient httpClient = new DefaultHttpClient();

        HttpPost httpPost = new HttpPost(urlTime);

        try {
            httpResponseTime = httpClient.execute(httpPost);

            StringHolderTime = EntityUtils.toString(httpResponseTime.getEntity(), "UTF-8");

        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        try {

            JSONArray jsonArray = new JSONArray(StringHolderTime);

            Log.i("MyLOG", "GetTime.doInBackground(): " + jsonArray.length());

            List<String> list = new ArrayList<String>();

            for (int i = 0; i < jsonArray.length(); i++) {
                JSONObject jsonObject = jsonArray.getJSONObject(i);
                String tim = jsonObject.getString("time");
                list.add(tim);
            }

            Log.i("MyLOG", "GetTime.doInBackground(): " + list);

            ArrayAdapter<String> adapter = new ArrayAdapter<String>(RecordActivity.this, android.R.layout.simple_spinner_item, list);
            adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            Spinner spinner = (Spinner) findViewById(R.id.spinner);
            spinner.setAdapter(adapter);

        } catch (JSONException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    protected void onPostExecute(Void result) {

        progressBar.setVisibility(View.GONE);

    }
}

public class GetTime extends AsyncTask<Void, Void, Void> {

    ArrayList<String> list;

    public Context context;

    public GetTime(Context context) {
        this.context = context;
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        list=new ArrayList<>();
    }

    @Override
    protected Void doInBackground(Void... arg0) {

        HttpClient httpClient = new DefaultHttpClient();

        HttpPost httpPost = new HttpPost(urlTime);

        try {
            httpResponseTime = httpClient.execute(httpPost);

            StringHolderTime = EntityUtils.toString(httpResponseTime.getEntity(), "UTF-8");

        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        try {
            JSONArray jArray =new JSONArray(StringHolderTime);
            for(int i=0;i<jArray.length();i++){
                JSONObject jsonObject=jArray.getJSONObject(i);
                list.add(jsonObject.getString("time"));
            }

        } catch (JSONException e) {
            e.printStackTrace();
        }
        return null;
    }

    protected void onPostExecute(Void result) {
        listItems.addAll(list);

        sp=(Spinner)findViewById(R.id.spinner);
        adapter=new ArrayAdapter<String>(RecordActivity.this, android.R.layout.simple_spinner_dropdown_item, list);
        sp.setAdapter(adapter);

        progressBar.setVisibility(View.GONE);

    }
}