datepicker - Android Date Picker help! -

i need little here.
in app user need`s select 1 date interval (when press 1 button), , i'm not know how using date picker!

i'm following example: http://developer.android.com/resources/tutorials/views/hello-datepicker.html , have 2 questions tutorial...

1) how can onclick event called datepickerdialog.ondatesetlistener ( in case have 2 edittext when user click in wich one, app shows date picker dialog)

2) how can call onclick 2 times after user press 1 button?

tnhx! sorry poor english!

so explanation, want create date interval picker 1 click on button. using analogy example have following:

// create 2 constants static final int date_dialog_from = 0; static final int date_dialog_to = 1;  // create case 2 pickers protected dialog oncreatedialog(int id) {     switch (id) {     case date_dialog_from:         return new datepickerdialog(this, fromdatesetlistener, myear, mmonth,mday);     case date_dialog_to:         return new datepickerdialog(this, todatesetlistener, myear, mmonth,mday);        }     return null; }  // create 2 listeners both of cases private datepickerdialog.ondatesetlistener fromdatesetlistener = new datepickerdialog.ondatesetlistener() {     public void ondateset(datepicker view, int year, int monthofyear, int dayofmonth) {         toast.maketext(accountsactivity.this,"from:" + year+"."+monthofyear+"."+dayofmonth, toast.length_short).show();         showdialog(date_dialog_to);     } };  private datepickerdialog.ondatesetlistener todatesetlistener = new datepickerdialog.ondatesetlistener() {     public void ondateset(datepicker view, int year, int monthofyear,int dayofmonth) {         toast.maketext(accountsactivity.this,"to:" + year+"."+monthofyear+"."+dayofmonth, toast.length_short).show();         updatedisplay();     } }; 

when run app, second picker appear right after finishing first.

later can optimize code, add custom pickers etc... if knows better way create date interval picker please let know!