android - How to remove OnClickListener method & directly show the result in TextView -

i have build application in i'm getting days difference result in textview when click on textview. have done searching on google. want result should automatically should displayed in textview. have given id textview in want show result automatically, id no_of_days.

my code is:

public class leave extends appcompatactivity {  textview date; private datepickerdialog datepickerdialog; //textview date2; //textview setday; private datepickerdialog datepickerdialog2; textview no_of_days; string date1 = "", date2 = ""; private textview strdate2; private textview strdate;    @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_leave);      strdate = (textview) findviewbyid(r.id.date);     strdate2 = (textview) findviewbyid(r.id.date2);     //setday = (textview) findviewbyid(r.id.setday);     no_of_days = (textview) findviewbyid(r.id.no_of_days);     final radiobutton radio_full = (radiobutton) findviewbyid(r.id.radio_full);     final radiobutton radio_half = (radiobutton) findviewbyid(r.id.radio_half);     radiogroup radiogroup = (radiogroup) findviewbyid(r.id.radioleave);     radiogroup.setoncheckedchangelistener(new radiogroup.oncheckedchangelistener() {         @override         public void oncheckedchanged(radiogroup radiogroup, int i) {             int buttonid = radiogroup.getcheckedradiobuttonid();             switch (buttonid) {                 case r.id.radio_full:                     toast.maketext(getapplicationcontext(), "you have selected full day leave", toast.length_short).show();                     break;                 case r.id.radio_half:                     toast.maketext(getapplicationcontext(), "you have selected half day leave", toast.length_short).show();                     break;             }         }     });      // hide radio buttons     radio_full.setvisibility(view.gone);     radio_half.setvisibility(view.gone);      // initiate date picker , button     strdate= (textview) findviewbyid(r.id.date);     // perform click event on edit text     strdate.setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view v) {             // calender class's instance , current date , month , year calender             final calendar c = calendar.getinstance();             int myear = c.get(calendar.year); // current year             int mmonth = c.get(calendar.month); // current month             int mday = c.get(calendar.day_of_month); // current day             // date picker dialog             datepickerdialog = new datepickerdialog(leave.this,                     new datepickerdialog.ondatesetlistener() {                          @override                         public void ondateset(datepicker view, int year,                                               int monthofyear, int dayofmonth) {                             // set day of month , month , year value in edit text                             // assign value date1                             date1 = dayofmonth + "/"                                     + (monthofyear + 1) + "/" + year;                              strdate.settext(dayofmonth + "/"                                     + (monthofyear + 1) + "/" + year);                              // check if date2 has been set , compare date1                             if (!textutils.isempty(date2)) {                                 // difference                                 getdifferencedays(date, date2 );                                  if(date1.equals(date2)) {                                     // pop radio button                                     radio_full.setvisibility(view.visible);                                     radio_half.setvisibility(view.visible);                                 } else {                                     // hide radio buttons                                     radio_full.setvisibility(view.gone);                                     radio_half.setvisibility(view.gone);                                 }                             }                          }                     }, myear, mmonth, mday);             datepickerdialog.show();         }     });      // initiate date picker , button    strdate2 = (textview) findviewbyid(r.id.date2);     // perform click event on edit text     strdate2.setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view v) {             // calender class's instance , current date , month , year calender             final calendar c = calendar.getinstance();             int myear = c.get(calendar.year); // current year             int mmonth = c.get(calendar.month); // current month             int mday = c.get(calendar.day_of_month); // current day             // date picker dialog             datepickerdialog2 = new datepickerdialog(leave.this,                     new datepickerdialog.ondatesetlistener() {                          @override                         public void ondateset(datepicker view, int year,                                               int monthofyear, int dayofmonth) {                             // set day of month , month , year value in edit text                              // assign value date2                             date2 = dayofmonth + "/"                                     + (monthofyear + 1) + "/" + year;                              strdate2.settext(dayofmonth + "/"                                     + (monthofyear + 1) + "/" + year);                             // check if date2 has been set , compare date1                             if (!textutils.isempty(date1)) {                                 // difference                                 getdifferencedays(date, date2);                                  if(date1.equals(date2)) {                                     // pop radio button                                     radio_full.setvisibility(view.visible);                                     radio_half.setvisibility(view.visible);                                 } else {                                     // hide radio buttons                                     radio_full.setvisibility(view.gone);                                     radio_half.setvisibility(view.gone);                                 }                             }                          }                     }, myear, mmonth, mday);             datepickerdialog2.show();          }     });      no_of_days.setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view v) {             simpledateformat format = new simpledateformat("dd/mm/yyyy");             string date01 = strdate.gettext().tostring();             string date02 = strdate2.gettext().tostring();             try {                 date d = format.parse(date01);                 date d1 = format.parse(date02);                 getdifferencedays(d, d1);             } catch (parseexception e) {                 e.printstacktrace();             }           }     });   }   private void getdifferencedays(textview d, string d1) {  }  public void getdifferencedays(date d1, date d2) {     int daysdiff = 0;     long diff = d2.gettime() - d1.gettime();     long diffdays = diff / (24 * 60 * 60 * 1000) + 1;     daysdiff = (int) diffdays;     no_of_days.settext(integer.tostring(daysdiff));     system.out.println("day count=>" + daysdiff); } 

}

pate following code in both date picker function

simpledateformat format = new simpledateformat("dd/mm/yyyy");              try {                 date d = format.parse(date1);                 date d1 = format.parse(date2);                 getdifferencedays(d, d1);             } catch (parseexception e) {                 e.printstacktrace();             } 

instead of calling method getdifferencedays(date, date2);