android - Last selected date is not getting in datepicker dialog -

in app have 1 datepicker,i able select , set selected date in textview,but issue if again click on textview open datepicker dailog,it shows current date instead of last selected date..so issue?

  public class mainactivity extends activity {  private textview date_dropdown;  @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      date_dropdown=(textview)findviewbyid(r.id.shows_dt);       calendar calendar = calendar.getinstance();      date_dropdown.settext(calendar.get(calendar.day_of_month) + "-"             + (calendar.get(calendar.month) + 1) + "-"             + calendar.get(calendar.year));      date_dropdown.setonclicklistener(new onclicklistener() {          @override         public void onclick(view v) {             showdatepickerdialog();         }     }); }  public void showdatepickerdialog() {      system.out.println("show date picke dilg ");     system.out.println("show date picke dilg");      dialogfragment newfragment1 = new selectdatefragment();     newfragment1.show(getfragmentmanager(), "datepicker"); }  public class selectdatefragment extends dialogfragment implements         datepickerdialog.ondatesetlistener {      @override     public dialog oncreatedialog(bundle savedinstancestate) {         final calendar calendar = calendar.getinstance();         int yy = calendar.get(calendar.year);         int mm = calendar.get(calendar.month);         int dd = calendar.get(calendar.day_of_month);         return new datepickerdialog(getactivity(), this, yy, mm, dd);     }      public void ondateset(datepicker view, int yy, int mm, int dd) {         populatesetdate(yy, mm + 1, dd);     }      public void populatesetdate(int year, int month, int day) {         date_dropdown.settext(day + "-" + month + "-" + year);     }  } 

below line have given current date, current date only.

 date_dropdown.settext(calendar.get(calendar.day_of_month) + "-"         + (calendar.get(calendar.month) + 1) + "-"         + calendar.get(calendar.year)); 

save selected date in shared preference show in textview