Cod Modificat

protected class LoadAllHospitalsOnline extends AsyncTask<Void, Void, JSONObject>
    {
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            String loading = "Incarcare...";
            TextView textView = (TextView) findViewById(R.id.textView);
            ProgressBar progressBar = (ProgressBar) findViewById(R.id.progressBar);
            ListView listview = (ListView) findViewById(list);
            progressBar.setVisibility(View.VISIBLE);
            textView.setVisibility(View.VISIBLE);
            listview.setVisibility(View.VISIBLE);
            textView.setText(loading);
        }

        @Override
        protected JSONObject doInBackground(Void... params)
        {

            URLConnection urlConn = null;
            BufferedReader bufferedReader = null;
            try
            {
                URL url = new URL(url_all_hospitals);
                urlConn = url.openConnection();
                bufferedReader = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));

                StringBuffer stringBuffer = new StringBuffer();
                String line;
                while ((line = bufferedReader.readLine()) != null)
                {
                    stringBuffer.append(line);
                }
                String jsonStr = stringBuffer.toString();
                if (jsonStr != null) {
                    try {
                        JSONObject jsonObj = new JSONObject(jsonStr);

                        // Getting JSON Array node
                        JSONArray hospitals = jsonObj.getJSONArray("spitale");

                        // looping through All Contacts
                        for (int i = 0; i < hospitals.length(); i++) {
                            JSONObject c = hospitals.getJSONObject(i);

                            String address = c.getString("adresa");
                            String name = c.getString("nume");
                            String phone = c.getString("numar");

                            // tmp hash map for single contact
                            HashMap<String, String> hospitalz = new HashMap<>();

                            // adding each child node to HashMap key => value
                            hospitalz.put("nume", name);
                            hospitalz.put("adresa", address);
                            hospitalz.put("telefon", phone);

                            // adding contact to contact list
                            hospitalList.add(hospitalz);
                        }
                    } catch (final JSONException e) {
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                Toast.makeText(getApplicationContext(),
                                        R.string.nodata,
                                        Toast.LENGTH_LONG)
                                        .show();
                            }
                        });

                    }
                } else {
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            Toast.makeText(getApplicationContext(),
                                    R.string.nodata,
                                    Toast.LENGTH_LONG)
                                    .show();
                        }
                    });

                }
                return new JSONObject(stringBuffer.toString());
            }
            catch(Exception ex)
            {
                return null;
            }
            finally
            {
                if(bufferedReader != null)
                {
                    try {
                        bufferedReader.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    runOnUiThread(new Runnable() {
                    public void run() {
                        /**
                         * Updating parsed JSON data into ListView
                         * */
                        final ListAdapter adapter = new SimpleAdapter(
                                hospitalActivity.this, hospitalList,
                                R.layout.list_item, new String[]{"nume", "adresa",
                                "telefon"}, new int[]{R.id.nume,
                                R.id.adresa, R.id.numar});

                        TextView textView = (TextView) findViewById(R.id.textView);
                        ProgressBar progressBar = (ProgressBar) findViewById(R.id.progressBar);
                        ListView listview = (ListView) findViewById(list);
                        listview.setAdapter(adapter);
                        listview.setVisibility(View.VISIBLE);
                        progressBar.setVisibility(View.INVISIBLE);
                        textView.setVisibility(View.INVISIBLE);
                        LinearLayout mainLayout=(LinearLayout) findViewById(R.id.fkd);
                        mainLayout.setVisibility(View.VISIBLE);
						EditText inputSearch = (EditText) findViewById(R.id.textToSearch);
                        inputSearch.addTextChangedListener(new TextWatcher() {

						@Override
						public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
							// When user changed the Text
							hospitalActivity.LoadAllHospitalsOnline.this.adapter.getFilter().filter(cs);
						}

						@Override
						public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
							// TODO Auto-generated method stub

						}
						@Override
						public void afterTextChanged(Editable arg0) {
							// TODO Auto-generated method stub
						}
						});
                    }
                });
                }
            }
        }

        @Override
        protected void onPostExecute(JSONObject response)
        {

        }
    }