Refresh listview SwipeRefreshLayout

Taking as a start I'm finishing my android app, and I need to update my custom listview when I slide down the screen.

I am implementing SwipeRefreshLayout only that I got stuck in the part of the onRefresh method and I do not know how to update my list, I clarify my listview I filled it from a webservices using the Asyntask class.

I leave the code for my Layout and my activity

layout ..

<android.support.v4.widget.SwipeRefreshLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/swipeContainer"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


<ListView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/clientes"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true" />

</android.support.v4.widget.SwipeRefreshLayout>

Activity

public class Clientes extends AppCompatActivity implements SearchView.OnQueryTextListener{

    ProgressDialog dialog;
    ListView list;
    ArrayList<CXCPSaldoClienteProveedor> cliArrayList = new ArrayList<CXCPSaldoClienteProveedor>();
    ArrayList<String> searchlist;
    MyArrayAdapter adaptador;
    public static String O_Cliente = "O_Cliente";
    DetalleMenu O_DetalleMenu;
    TextView textView;
    SwipeRefreshLayout mSwipeRefreshLayout;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_clientes);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        Intent intent = getIntent();
        O_DetalleMenu = (DetalleMenu) intent.getSerializableExtra("O_DetalleMenu");
        mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeContainer);
        mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                adaptador.notifyDataSetChanged();
                mSwipeRefreshLayout.setRefreshing(false);
            }
        });
        list = (ListView) findViewById(R.id.clientes);
        list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                TextView idcli = (TextView) view.findViewById(R.id.clienid);
                Intent intent = new Intent(Clientes.this, Detalle_Cliente.class);
                intent.putExtra("O_Cliente", (CXCPSaldoClienteProveedor) ((TextView) view.findViewById(R.id.clienid)).getTag());
                intent.putExtra("O_DetalleMenu", (DetalleMenu) O_DetalleMenu);
                startActivity(intent);
            }
        });

        AsynClien task = new AsynClien();
        //Call execute
        task.execute();
    }

    @Override
    public boolean onCreateOptionsMenu(android.view.Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_cliente, menu);

        final MenuItem searchItem = menu.findItem(R.id.action_search);
        final SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
        //permite modificar el hint que el EditText muestra por defecto
        searchView.setQueryHint(getText(R.string.search));
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                return true;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                if (TextUtils.isEmpty(newText)) {
                    adaptador.filter("");
                    list.clearTextFilter();
                } else {
                    adaptador.filter(newText);
                }
                return true;
            }
        });
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public boolean onQueryTextSubmit(String query) {
        return false;
    }

    @Override
    public boolean onQueryTextChange(String newText) {
        return false;
    }

    private class AsynClien extends AsyncTask<String, ArrayList, ArrayList> {


        @Override
        protected ArrayList doInBackground(String... params) {
            cliArrayList = webService.Clientes(O_DetalleMenu.getDocumento());
            return null;
        }

        @Override
        //Make Progress Bar visible
        protected void onPreExecute() {

            dialog = new ProgressDialog(Clientes.this);
            dialog.setIndeterminate(false);
            dialog.setMessage("Cargando Clientes...");
            dialog.setCancelable(false);
            dialog.show();

        }

        //Once WebService returns response
        @Override
        protected void onPostExecute(ArrayList arrayList) {
            super.onPostExecute(arrayList);
            if (cliArrayList.size() != 0) {
                dialog.dismiss();

                adaptador = new MyArrayAdapter(Clientes.this, cliArrayList);///* no se usa your_array_list
                //list.setAdapter(adaptador);

                ListView listView = (ListView) findViewById(R.id.clientes);
                listView.setAdapter(adaptador);


            } else {
                dialog.dismiss();
                finish();
            }
        }
    }




    public class MyArrayAdapter extends ArrayAdapter<CXCPSaldoClienteProveedor>{

        private List<CXCPSaldoClienteProveedor> searchList;

        public MyArrayAdapter(Context context, ArrayList<CXCPSaldoClienteProveedor> ArrayClientes)
        {
            super(context, 0, ArrayClientes);
            this.searchList = new ArrayList<>();
            this.searchList.addAll(cliArrayList);
        }


        @Override
        public int getCount() {
            return cliArrayList.size();
        }



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

            RecyclerView.ViewHolder holder;

            CXCPSaldoClienteProveedor O_Cliente = getItem(position);

            // Check if an existing view is being reused, otherwise inflate the view
            if (convertView == null) {
                convertView = LayoutInflater.from(getContext()).inflate(R.layout.row_cliente, parent, false);
            }


            //Obteniendo instancias de los text views
            TextView nombre = (TextView) convertView.findViewById(R.id.nombrecli);
            TextView saldov = (TextView) convertView.findViewById(R.id.txtsaldov);
            TextView saldot = (TextView) convertView.findViewById(R.id.txtsaldot);
            TextView idcli = (TextView) convertView.findViewById(R.id.clienid);


            //INICIALIZAR FORMAT
            DecimalFormat numberFormat = new DecimalFormat("###,##0.00");

            nombre.setText(O_Cliente.getClienteDescripcion());
            nombre.setTag(O_Cliente);

            saldov.setText(numberFormat.format(O_Cliente.getSaldoVencido()));
            saldot.setText(numberFormat.format(O_Cliente.getSaldo()));

            idcli.setText(String.valueOf(O_Cliente.getCliente()));
            idcli.setTag(O_Cliente);

            // Se almacena en settag el objeto Cliente
            convertView.setTag(O_Cliente);

            //Devolver al ListView la fila creada
            return convertView;
        }

        public void filter(String newText) {
            newText = newText.toLowerCase(Locale.getDefault());
            cliArrayList.clear();
            if (newText.length() == 0) {
                cliArrayList.addAll(searchList);
            } else {
                for (CXCPSaldoClienteProveedor s : searchList) {
                    if (s.toLowerCase(Locale.getDefault()).contains(newText)) {
                        cliArrayList.add(s);
                    }
                }
            }
            notifyDataSetChanged();
        }
    }


} 

Refresh code

mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeContainer);
mSwipeRefreshLayout.setDistanceToTriggerSync(20);// in dips
mSwipeRefreshLayout.setSize(SwipeRefreshLayout.DEFAULT);
mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
    @Override
    public void onRefresh() {
        new AsynClien().execute();
    }
});