FindViewById в DialogFragment

public class SetupDialogFragment extends DialogFragment {
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        LayoutInflater inflater = getActivity().getLayoutInflater();
        builder.setView(inflater.inflate(R.layout.setup_dialog, null))
                .setPositiveButton("Save", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int id) {
                    }
                })
                .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                    }
                });
        EditText Obj = (EditText)findViewById(R.id.IDText);
        return builder.create();
    }
}

        builder.setView(inflater.inflate(R.layout.setup_dialog, null))
        ...
        EditText Obj = (EditText)findViewById(R.id.IDText);

        View view = inflater.inflate(R.layout.setup_dialog, null);
        builder.setView(view)
        ...
        EditText Obj = (EditText)view.findViewById(R.id.IDText);