android - Validate date picker dialog for birthday -

public void onclick(view view) {     calendar c = calendar.getinstance();      int cyear = c.get(calendar.year);     int cmonth = c.get(calendar.month);     int cday = c.get(calendar.day_of_month);             datepickerdialog dialog = new datepickerdialog(students.this,new ondatesetlistener() {          public void ondateset(datepicker view, int year, int monthofyear, int dayofmonth) {              string date_selected = string.valueof(dayofmonth)+" /"+string.valueof(monthofyear+1)+" /"+string.valueof(year);             datefieldtextbox.settext(date_selected);             //                              campusnewsisactivity.showlog("datefieldtextbox selected");         }     },cyear,cmonth,cday);     //          dialog.setcancelable(false);     dialog.show(); } 

want validate datepickerdialof bday ie. should not accept birthdate before 1st jan 1985

package com.example.pickerdate;  import java.util.calendar;  import android.app.activity; import android.app.datepickerdialog; import android.app.dialog; import android.os.bundle; import android.view.view; import android.widget.button; import android.widget.datepicker; import android.widget.datepicker.ondatechangedlistener; import android.widget.textview; import android.widget.toast;  public class mainactivity extends activity {      private textview mdatedisplay;     private int myear;     private int year1;     private int mmonth;     private int mday;     private int month;     private int day;     static final int date_dialog_id = 1;     button pickdate;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);         mdatedisplay = (textview) findviewbyid(r.id.datedisplay);         pickdate = (button) findviewbyid(r.id.pickdate);         pickdate.setonclicklistener(new view.onclicklistener() {              public void onclick(view v) {                 system.out.println("hello3");                 showdialog(date_dialog_id);              }         });          system.out.println("hello1");         final calendar c = calendar.getinstance();         myear = c.get(calendar.year);         mmonth = c.get(calendar.month);         mday = c.get(calendar.day_of_month);         updatedisplay();         year1 = myear;         month = mmonth;         day = mday;     }      @override     protected dialog oncreatedialog(int id) {         datepickerdialog _date = null;         switch (id) {          case date_dialog_id:             _date = new datepickerdialog(this, mdatesetlistener, myear, mmonth,                     mday) {                 @override                 public void ondatechanged(datepicker view, int year,                         int monthofyear, int dayofmonth) {                     system.out.println("----------ondatechanged()-----------"                             + myear + "--" + year);                     system.out.println("----------ondatechanged()-----------"                             + mmonth + "--" + monthofyear);                     system.out.println("----------ondatechanged()-----------"                             + mday + "--" + dayofmonth);                      /*                      * these lines of commented code used setting                      * maximum date on date picker..                      *                       * if (year > myear && year) view.updatedate(myear, mmonth,                      * mday);                      *                       * if (monthofyear > mmonth && year == myear )                      * view.updatedate(myear, mmonth, mday);                      *                       * if (dayofmonth > mday && year == myear && monthofyear ==                      * mmonth) view.updatedate(myear, mmonth, mday);                      */                      // these below lines of code used setting maximum                     // minimum dates on date picker dialog..                      if ((myear > year)                             || ((mmonth > monthofyear) && (myear == year))                             || ((mday > dayofmonth) && (myear == year) && (mmonth == monthofyear))) {                         view.updatedate(year1, month, day);                      }                  }             };          }         system.out.println("hello5");         return _date;     }      protected void onpreparedialog(int id, dialog dialog) {         switch (id) {          case date_dialog_id:             system.out.println("hello6");              ((datepickerdialog) dialog).updatedate(myear, mmonth, mday);             break;         }     }      private void updatedisplay() {         system.out.println("hello2");         mdatedisplay.settext(new stringbuilder()                 // month 0 based add 1                 .append(mmonth + 1).append("-").append(mday).append("-")                 .append(myear).append(" "));     }      private datepickerdialog.ondatesetlistener mdatesetlistener = new datepickerdialog.ondatesetlistener() {          public void ondateset(datepicker view, int year, int monthofyear,                 int dayofmonth) {             system.out.println("hello7");              myear = year;             mmonth = monthofyear;             mday = dayofmonth;             system.out.`enter code here`println("year=" + year);             system.out.println("month=" + monthofyear);             system.out.println("day=" + dayofmonth);             updatedisplay();         }     }; }