android fragments - How can we set value in Edittext of different class -

i m using time fragment. on click of edittext box have opened time picker this. final fragmentmanager fm = getfragmentmanager(); time.setonclicklistener(new onclicklistener() {

            @targetapi(build.version_codes.honeycomb)             @suppresswarnings("deprecation")             public void onclick(view v) {                 fragmentmanager fm = getfragmentmanager();                  dialogfragment2=new datetimedialogfragment(activitygroup4.context ,2);                 dialogfragment2.setcontextandview(appstate,vi,time);                 system.out.println(vi+" view meeting list ");                 dialogfragment2.setretaininstance(true);                 dialogfragment2.show(fm, "fragment_name");             }         }); 

this leads time picker open. here appstate context object,vi view object of expandable list adapter groupchildview method access edittext in datetime fragment class

in datetimedialogfragment when picker open , set button clicked value value not displayed on edittext box of last activity

public class datetimedialogfragment extends dialogfragment implements ondatechangedlistener, ontimechangedlistener { // define constants date-time picker. string time_and_date = ""; int = 0, j = 0; //stringbuilder click = new stringbuilder();; public final static int date_picker = 1; public final static int time_picker = 2; public final static int date_time_picker = 3;

// datepicker reference private datepicker datepicker;  // timepicker reference private timepicker timepicker;  // calendar reference private calendar mcalendar;  // define activity private activity activity;  // define dialog type private int dialogtype;  // define dialog view private view mview;  // constructor start public datetimedialogfragment(activity activity) {     this(activity, date_time_picker); }  context context; view v; edittext refrenced;  public void setcontextandview(context context, view v, edittext refrenced) {     this.refrenced = refrenced;     this.context = context;     this.v = v;     //time_and_date = refrenced.gettext().tostring(); }  @suppresslint("validfragment") public datetimedialogfragment(activity activity, int dialogtype) {     this.activity = activity;     this.dialogtype = dialogtype;      // inflate layout view     // pass null parent view because going in dialog layout     layoutinflater inflater = activity.getlayoutinflater();     mview = inflater.inflate(r.layout.date_time_dialog, null);      // grab calendar instance     mcalendar = calendar.getinstance();      // init date picker     datepicker = (datepicker) mview.findviewbyid(r.id.datepicker1);     datepicker.init(mcalendar.get(calendar.year),             mcalendar.get(calendar.month),             mcalendar.get(calendar.day_of_month), this);      // init time picker     timepicker = (timepicker) mview.findviewbyid(r.id.timepicker1);      // set default calendar , time style     setis24hourview(false);     setcalendarviewshown(false);      switch (dialogtype) {     case date_picker:         timepicker.setvisibility(view.gone);         break;     case time_picker:         datepicker.setvisibility(view.gone);         break;     } }  @override public dialog oncreatedialog(bundle savedinstancestate) {      // use builder class convenient dialog construction     builder builder = new alertdialog.builder(activity);      // set layout dialog     builder.setview(mview);      // set title of dialog     builder.setmessage("set date")             // set ok button             .setpositivebutton("set",                     new dialoginterface.onclicklistener() {                         public void onclick(dialoginterface dialog, int id) {                              // user ok dialog                             // system.out.println(time_and_date);                             if (time_and_date != "") {                                 if (time_and_date.length() <= 5) {                                      system.out.println(time_and_date + "  "                                             + v);                                     // edittext time = (edittext)                                     // v.findviewbyid(r.id.time_specially_for_fragment);                                     system.out.println(refrenced.gettext());                                     system.out.println("sss");                                     refrenced.settext(time_and_date);                                     refrenced.setvisibility(view.invisible);                                     ;                                 } else {                                     system.out.println(time_and_date);                                     // edittext time = (edittext)                                     // v.findviewbyid(r.id.date_specially_for_fragment);                                     // time.settext(time_and_date);                                 }                             } else {                                 system.out.println("went wrong");                                 if (dialogtype ==2) {                                     int hour = mcalendar                                             .get(calendar.hour_of_day);                                     int min = mcalendar                                             .get(calendar.minute);                                     time_and_date = "" + hour + ":" + (min);                                     system.out.println(time_and_date);                                     = j = 0;                                  } else if (dialogtype==1                                         ) {                                      int day = mcalendar                                             .get(calendar.day_of_month);                                     int month = mcalendar                                             .get(calendar.month);                                     int year = mcalendar.get(calendar.year);                                      time_and_date=""+day+"/"+(month+1)+"/"+year;                                     i=j=0;                                     system.out.println(time_and_date);                                 }                              }                          }                     })             // set cancel button             .setnegativebutton("cancel",                     new dialoginterface.onclicklistener() {                         public void onclick(dialoginterface dialog, int id) {                             // user cancelled dialog                             datetimedialogfragment.this.getdialog()                                     .cancel();                         }                     });      // create alertdialog object , return     return builder.create(); }  @targetapi(build.version_codes.honeycomb) @override public void onactivitycreated(bundle savedinstancestate) {     super.onactivitycreated(savedinstancestate);     timepicker.setontimechangedlistener(this); }  // convenience wrapper internal calendar instance public int get(final int field) {     return mcalendar.get(field); }  // convenience wrapper internal calendar instance public long getdatetimemillis() {     return mcalendar.gettimeinmillis(); }  // convenience wrapper internal timepicker instance public void setis24hourview(boolean is24hourview) {     timepicker.setis24hourview(is24hourview); }  // convenience wrapper internal timepicker instance public boolean is24hourview() {     return timepicker.is24hourview(); }  // convenience wrapper internal datepicker instance public void setcalendarviewshown(boolean calendarview) {     datepicker.setcalendarviewshown(calendarview); }  // convenience wrapper internal datepicker instance @targetapi(build.version_codes.honeycomb) public boolean calendarviewshown() {     return datepicker.getcalendarviewshown(); }  // convenience wrapper internal datepicker instance public void updatedate(int year, int monthofyear, int dayofmonth) {     datepicker.updatedate(year, monthofyear, dayofmonth); }  // convenience wrapper internal timepicker instance public void updatetime(int currenthour, int currentminute) {     timepicker.setcurrenthour(currenthour);     timepicker.setcurrentminute(currentminute);  }  public string getdatetime() {     simpledateformat sdf = new simpledateformat("yyyy-mm-dd hh:mm:ss",             locale.us);     return sdf.format(mcalendar.gettime()); }  // called every time user changes datepicker values @override public void ondatechanged(datepicker view, int year, int monthofyear,         int dayofmonth) {     // update internal calendar instance     i++;     // click='date';     mcalendar.set(year, monthofyear, dayofmonth,             mcalendar.get(calendar.hour_of_day),             mcalendar.get(calendar.minute));      time_and_date = "" + dayofmonth + "/" + monthofyear + "/" + year;  }  // called every time user changes timepicker values @override public void ontimechanged(timepicker view, int hourofday, int minute) {     // update internal calendar instance     j++;     mcalendar.set(mcalendar.get(calendar.year),             mcalendar.get(calendar.month),             mcalendar.get(calendar.day_of_month), hourofday, minute);     time_and_date = hourofday + ":" + minute;     system.out.println("from time changing " + time_and_date);     // gettime();  }  string getdate() {     return time_and_date; }  string gettime() {     return time_and_date;  } 

}

how set time in edittext box