Reload the fragment in android?

I am building an android application where on click of add button an viewdailog box is open an in there is an fom fill by the user.

I need is that on click of ok button of that viewdailog box my fragment should be reloaded as user has added the vaules.

Here is the method that I am using in viewDialog box - \

private void viewCategory() {

        AlertDialog.Builder viewDialog = new AlertDialog.Builder(getActivity());

        viewDialog.setTitle("add");

        LayoutInflater li = (LayoutInflater)     
        getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View dialogView = li.inflate(R.layout.customealertdialogbox1, null);
        viewDialog.setView(dialogView);

        viewDialog.setPositiveButton("Ok",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        name = edt1.getText().toString();
                        address = edt2.getText().toString();
                        city = edt3.getText().toString();
                        phone = edt4.getText().toString();
                        //Toast.makeText(getActivity(), name, Toast.LENGTH_SHORT).show();
                        new DownloadJSON().execute();

                    }
                });

        viewDialog.setNegativeButton("Cancel",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {

                    }
                });
        viewDialog.show();

        edt1 = (EditText) dialogView.findViewById(R.id.editbox1);
        edt2 = (EditText) dialogView.findViewById(R.id.editbox2);
        edt3 = (EditText) dialogView.findViewById(R.id.editbox3);
        edt4 = (EditText) dialogView.findViewById(R.id.editbox4);
 }

Copyright Notice：Content Author:「Test123」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/26966801/reload-the-fragment-in-android