Cannot use search view to filter list view displaying data pulled from SQL server

Question

I am very new to app development and i'm trying to create an app connect to an sql server. The app pulls data from the server and displays it in a list view. I am now trying to add a search view that filter the list view but i am receiving error saying that i need to create a new constructor. i am struggling to connect it to my existing routine. I would appreciate any help in fixing this.

public class MainActivity extends AppCompatActivity {

ArrayList<ClassListItems> itemsArrayList;
MyAppAdapter myAppAdapter;
ListView listView;
SearchView searchView;
boolean success = false;
ConnectionClass connectionClass;



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




    listView = (ListView) findViewById(R.id.ListView);
    connectionClass = new ConnectionClass();
    itemsArrayList = new ArrayList<ClassListItems>();



    SyncData orderData = new SyncData();
    orderData.execute("");



}







private class SyncData extends AsyncTask<String, String, String>
{
    String msg = "Error";
    ProgressDialog progress;

    @Override
    protected void onPreExecute()
    {
        progress = ProgressDialog.show(MainActivity.this,"Synchronising",
                "Listview Loading! Please Wait...", true);

    }

    @Override
    protected String doInBackground(String... strings)
    {
        try {
            Connection conn = connectionClass.CONN();
            if (conn == null)
            {
                success = false;
            }

            else{
                String query = "Select Combined FROM Employee_Information";
                Statement stmt = conn.createStatement();
                ResultSet rs = stmt.executeQuery(query);
                if (rs != null)
                {
                    while (rs.next())
                    {
                        try {
                            itemsArrayList.add(new ClassListItems(rs.getString("Combined")));
                        } catch (Exception ex){
                            ex.printStackTrace();
                        }
                    }
                    msg = "Found";
                    success = true;
                } else{
                    msg = "No data found!";
                    success = false;
                }
            }
        } catch (Exception e)
        {
            e.printStackTrace();
            Writer writer = new StringWriter();
            e.printStackTrace(new PrintWriter(writer));
            msg = writer.toString();
            success = false;
        }
        return  msg;

    }

    @Override
    protected void onPostExecute(String msg)
    {
        progress.dismiss();;
        Toast.makeText(MainActivity.this, msg + "", Toast.LENGTH_LONG).show();
        if (success == false)
        {

        }
        else{
            try{
                myAppAdapter = new  MyAppAdapter(itemsArrayList, MainActivity.this);
                listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
                listView.setAdapter(myAppAdapter);


            } catch (Exception ex)
            {

            }
        }
    }
}

public class  MyAppAdapter extends BaseAdapter
{

    public class ViewHolder
    {
        TextView textName;
    }
    public List<ClassListItems> parkingList;

    public Context context;
    ArrayList<ClassListItems> arrayList;

    private MyAppAdapter(List<ClassListItems> apps, Context context)
    {
        this.parkingList = apps;
        this.context = context;
        arrayList = new ArrayList<ClassListItems>();
        arrayList.addAll(parkingList);
    }
    @Override
    public int getCount() {
        return parkingList.size();
    }

    @Override
    public Object getItem(int position) {
        return position;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }



    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {

        View rowView = convertView;
        ViewHolder viewHolder= null;
        if(rowView == null)
        {
            LayoutInflater inflater = getLayoutInflater();
            rowView = inflater.inflate(R.layout.list_content, parent, false);
            viewHolder = new ViewHolder();
            viewHolder.textName = (TextView) rowView.findViewById(R.id.textName);
            rowView.setTag(viewHolder);
        }
        else
        {
            viewHolder = (ViewHolder)  convertView.getTag();
        }

        viewHolder.textName.setText(parkingList.get(position).getName()+"");

        return rowView;
    }

    private void initSearchWidgets()
    {
        SearchView searchView = (SearchView) findViewById(R.id.searchView);

        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                return false;
            }

            @Override
            public boolean onQueryTextChange(String newText)
            {
                ArrayList<ClassListItems> filteredNames = new ArrayList<ClassListItems>();

                MyAppAdapter adapter = new MyAppAdapter(getApplicationContext(), 0, filteredNames);
                listView.setAdapter(adapter);

                return false;
            }
        });
    }
}

private void setUpList ()
{
    listView = (ListView) findViewById(R.id.searchView);

    MyAppAdapter adapter;
    adapter = new MyAppAdapter(getApplicationContext(), 0, itemsArrayList);
    listView.setAdapter(adapter);
}






}