To save and retrieve values from a server in a list

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activitiy_address_group);

        editSearch = (EditText) findViewById(R.id.address_group_edtadd);
        listView = (ListView) findViewById(R.id.address_group_addlist);

        list = new ArrayList<>();
        Tablename = new ArrayList<>();
        // Create a list.

        //Send server class
        InsertData task = new InsertData();
        task.execute("serverURL");

        // Pre-save the data to be used for the search.
        //settingList();

        // Copy all data from the list to the arraylist.// Make a copy of the list.
        arraylist = new ArrayList<String>();
        arraylist.addAll(list);

        // Create an adapter to be linked to the list.
        adapter = new AddressGroupAdapter(list, this);

        // Connect the adapter to the list view.
        listView.setAdapter(adapter);

        // When entering a search term in the input window, define the "addTextChangedListener" event listener.
        editSearch.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {}

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {}

            @Override
            public void afterTextChanged(Editable editable) {
                // Called whenever a character is entered in the input window.
                // Invoke the search method.
                String text = editSearch.getText().toString();
                search(text);
            }
        });
    }

class InsertData extends AsyncTask<String, Void, String> {

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

    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);

        try {
            JSONObject Land = new JSONObject(result);
            JSONArray jsonArray = Land.getJSONArray("Response");
            for (int i = 0; i < jsonArray.length(); i++) {
                JSONObject subJsonObject = jsonArray.getJSONObject(i);
                String TableName = subJsonObject.getString("serverURL");
                Tablename.add(TableName);
                namelist = Tablename.get(i);
                list.add(TableName); //Add value received from server to list
            }
        } } catch (JSONException e) {
            e.printStackTrace();
            }
        }
    }