android - Show dialogfragment inside a fragment -

i want display dialogfragment implements datepickerdialog inside fragment! have button listener displays datepickerdialog. button defined in fragment layout as:

<button         android:id="@+id/buttonselectdate"         android:layout_width="wrap_content"         android:layout_alignparentright="true"         android:layout_height="wrap_content"     android:onclick="showdatepickerdialog" /> 

the code of fragment class following(my problem in showdatepickerdialog function):

public  class schedulerchooserfragment extends fragment {      private int year;     private int month;     private int day;      textview datetext;        view rootview;      @override     public view oncreateview(layoutinflater inflater, viewgroup container,             bundle savedinstancestate) {          layoutinflater lf = getactivity().getlayoutinflater();          rootview = lf.inflate(r.layout.fragment_scheduler_chooser, container,false);          return rootview;     }        // display current date     public void showcurrentdateonview() {          datetext = (textview) rootview.findviewbyid (r.id.textdate);          final calendar c = calendar.getinstance();         year = c.get(calendar.year);         month = c.get(calendar.month);         day = c.get(calendar.day_of_month);          system.out.println("year" + year);         // set current date textview         datetext.settext(month + 1 +"-"+day+"-"+year);          // set current date datepicker       }      public void showdatepickerdialog(view v) {         dialogfragment newfragment = new datepickerfragment(datetext);         newfragment.show(getsupportfragmentmanager(), "datepicker");                 }  } 

however, getsupportfragmentmanager not exist inside fragment. have tried getactivity().getsupportfragmentmanager app crashes. also, have tried getchildfragmentmanager, , app crashes too.

the datepickerfragment class folllowing:

import java.util.calendar;  import android.app.datepickerdialog; import android.app.dialog; import android.os.bundle; import android.support.v4.app.dialogfragment; import android.widget.datepicker; import android.widget.textview;  public class datepickerfragment extends dialogfragment implements datepickerdialog.ondatesetlistener{      textview txtdate;        public datepickerfragment(textview txtdate) {         super();         this.txtdate = txtdate;     }      @override         public dialog oncreatedialog(bundle savedinstancestate) {             // use current date default date in picker             final calendar c = calendar.getinstance();             int year = c.get(calendar.year);             int month = c.get(calendar.month);             int day = c.get(calendar.day_of_month);              // create new instance of datepickerdialog , return             return new datepickerdialog(getactivity(), this, year, month, day);         }          public void ondateset(datepicker view, int year, int month, int day) {             /*txtdate.settext(year+" " +month +" "+ date);*/         }    } 

i new android! sorry, if issue obvious.

thanks

in schedulerchooserfragment imports fragment , fragmentmanager must both android.support.v4.app

so,

import android.support.v4.app.fragment; import android.support.v4.app.fragmentmanager;