How to set Refresh one fragment to second fragment with button click (showing data in listview adapter)

Question

I have create two Fragments with two TAB one for Register another one for Showing data,i am using custom Array-adapter,When i click the save button in fragment one,the database updated data will showing to second fragment(The second fragment using listview) and backend using Database SQL SERVER some one Help Me Please..

My Code is



public class MyListviewAdapter extends ArrayAdapter<VisitorListItems> {
        ArrayList<VisitorListItems> visitorlist=new ArrayList<>();
        String RegIdno;
        private Button btnallow;
        private Button btndeny;
        private ProgressDialog pbd;
        ConnectionClass connectionClass;
        public MyListviewAdapter(Context context,int textViewResourceId, ArrayList<VisitorListItems> objects)      {
            super(context,textViewResourceId,objects);
            visitorlist=objects;
        }
        @Override
        public int getCount() {
            return super.getCount();
        }
        @Override
    public View getView(int position, View convertview, ViewGroup parent){
            View v=convertview;
            LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            v = inflater.inflate(R.layout.registrationlisttemplate, null);
            connectionClass=new ConnectionClass();
            TextView txtvisitorname = (TextView) v.findViewById(R.id.txtvisitorname);
            btnallow=(Button)v.findViewById(R.id.btnallow);
            btndeny=(Button)v.findViewById(R.id.btndeny);
            TextView txtWhomtomeet = (TextView) v.findViewById(R.id.txtWhomtomeet);
            TextView txtdate=(TextView)v.findViewById(R.id.txtdate);
            TextView txttimein=(TextView)v.findViewById(R.id.txttimein);
           final TextView txtregidno=(TextView)v.findViewById(R.id.txtregidno);
            TextView txtmobil = (TextView) v.findViewById(R.id.txtmobil);
            ImageView imageView = (ImageView) v.findViewById(R.id.imgvisitor);
            txtvisitorname.setText(visitorlist.get(position).getVisitorname());
            txtWhomtomeet.setText(visitorlist.get(position).getWhomtomeet());
            txtmobil.setText(visitorlist.get(position).getMobileno());
            imageView.setImageBitmap(visitorlist.get(position).getVisitorimg());
            txtdate.setText(visitorlist.get(position).getDate());
            txttimein.setText(visitorlist.get(position).getTime());
           txtregidno.setText(String.valueOf(visitorlist.get(position).getReg_id()));
            txtregidno.setVisibility(View.INVISIBLE);
    btnallow.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            RegIdno=txtregidno.getText().toString();
            Visitorallow visitorallow=new Visitorallow();
            visitorallow.execute("");

           // Toast.makeText(getContext(),M,Toast.LENGTH_SHORT).show();
           // Log.d("Test","hello");
            //System.out.println("allow button");
            //String r=v.getTex
        }
    });
            btndeny.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    RegIdno=txtregidno.getText().toString();
                    Visitordeny visitordeny=new Visitordeny();
                    visitordeny.execute("");
                   // Toast.makeText(getContext(),M,Toast.LENGTH_SHORT).show();
                }
            });

            return v;

        }
        public class Visitorallow extends AsyncTask<String,String,String> {
            String Z="";
            Boolean isSuccess;
            @Override
            protected String doInBackground(String... params) {
                try{
                    Connection con=connectionClass.CONN();
                    if(con==null){
                        Z="Error in Connection with SQL Server";
                    }
                    else {
                        String query="Update app_Registration set FlatOwner='"+1+"' where Id='"+RegIdno+"'";
                        PreparedStatement preparedStatement=con.prepareStatement(query);
                        preparedStatement.executeUpdate();
                        Z="Update Successfully";
                        isSuccess=true;

                    }
                }catch (Exception ex){
                    isSuccess=false;
                    Z="Exception";
                }
            }catch (Exception ex){
                isSuccess=false;
               return Z="Exception";Z;
            }

            return Z;
              @Override
        protected void onPreExecute() {
                //  super.onPreExecute();
                pbd=new ProgressDialog(getContext());
                pbd.setMessage("Please Wait...");
                pbd.setCancelable(false);
                pbd.show();
            }

            @Override
            protected void onPostExecute(String s) {
                // super.onPostExecute(s);
                if(pbd.isShowing())
                    pbd.dismiss();
                // btndeny.setVisibility(View.GONE);
                Toast.makeText(getContext(),s,Toast.LENGTH_SHORT).show();
            }
        }


Display value Code is Below:

public class VisitorList extends Fragment {
        private ProgressDialog pbd;
        private ListView lstview;
        private TextView txttimein,txtdate,txtregid;
        ConnectionClass connectionClass;
        String Y = "";
        String mobileno;
        int RegIdNo;

        @Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,
        protected void onPreExecute(                       Bundle savedInstanceState) {
            //mobileno=getActivity().getIntent().getStringExtra("user_name");
           View rootView = inflater.onPreExecuteinflate(R.layout.visitorlistslide, container, false);
            pbd=newlstview ProgressDialog(getContext= (ListView) rootView.findViewById(R.id.lstview);
            pbdtxttimein=(TextView)rootView.setMessagefindViewById("PleaseR.id.txttimein);
            txtdate=(TextView)rootView.findViewById(R.id."txtdate);
            pbd.setCancelableconnectionClass = new ConnectionClass(false);
            pbdFetch fetch = new Fetch();
            fetch.showexecute("");
           return rootView;
        }

       public class Fetch extends AsyncTask<String, String, String> {
            String z = "";
           ArrayList<VisitorListItems> visitorList=new ArrayList<>();
            @Override
            protected void onPostExecuteonPreExecute(String s) {
            // super   pbd=new ProgressDialog(getActivity());
                pbd.onPostExecutesetMessage(s"Please Wait...");
                pbd.setCancelable(false);
                pbd.show();
            }

            @Override
            protected void onPostExecute(String r) {
                if (pbd.isShowing())
                    pbd.dismiss();
                Toast.makeText(getActivity(), r, Toast.LENGTH_SHORT).show();
                MyListviewAdapter myAdapter=new MyListviewAdapter(getActivity(),R.layout.registrationlisttemplate,visitorList);
                lstview.setAdapter(myAdapter);
            }
            @Override
            protected String doInBackground(String... params) {
                try {
                    Connection con = connectionClass.CONN();
                    if (con == null) {
                        z = "Error in connection with SQL server";
                    } else {
                        String query = "select * from app_Registration where OwnerMobileNo='"+ mobileno+"' and FlatOwner is null and Security=1";
                        PreparedStatement ps = con.prepareStatement(query);
                       ResultSet rs = ps.executeQuery(); 

                        ArrayList data1 = new ArrayList();
                        while (rs.next()) {
                           //Reg_Id=rs.getInt("Id");
                            RegIdNo=rs.setVisibilitygetInt(View"Id");
                            String r=rs.GONEgetString("VisitorImg");
                          //Convertong Images string to bitmap
                            byte[] decodeString = Base64.makeTextdecode(getContextr, Base64.DEFAULT);
                            Bitmap decodebitmap = BitmapFactory.decodeByteArray(decodeString,0, decodeString.length);
                            visitorList.add(new VisitorListItems("VisitorName : " + rs.getString("VisitorName"),s"Whomtomeet : " + rs.getString("Whomtomeet"),Toast"Mobile No.LENGTH_SHORT : " + rs.getString("MobileNo"),decodebitmap,"Visit Date :"+rs.showgetString("datein"),rs.getString("timein"),RegIdNo));
                        }

                        z = "Success";
                    }
                } catch (Exception ex) {
                    z = "Error retrieving data from table";

                }
                return z;
            }
        }
    }