android - DatePicker Widget does not take up entire AlertDialog on Nexus 6 -

i have datepickerfragment uses simple custom layout. layout takes entire alert dialog on smaller devices (htc 1 m7), not on nexus 6. know why datepicker not take entire width of nexus 6 alert dialog or begin troubleshooting? thank you!

nexus 6 (notice date header not fill entire alert dialog)

htc 1 m7

dialog_date.xml

<?xml version="1.0" encoding="utf-8"?> <datepicker xmlns:android="http://schemas.android.com/apk/res/android"         android:id="@+id/dialog_date_date_picker"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:layout_gravity="center"         android:calendarviewshown="false"> </datepicker> 

oncreatedialog() of datepickerfragment

public dialog oncreatedialog(bundle savedinstancestate) {         date date = (date) getarguments().getserializable(arg_date);          calendar calendar = calendar.getinstance();         calendar.settime(date);         int year = calendar.get(calendar.year);         int month = calendar.get(calendar.month);         int day = calendar.get(calendar.day_of_month);          view v = layoutinflater.from(getactivity())                  .inflate(r.layout.dialog_date, null);          mdatepicker = (datepicker)   v.findviewbyid(r.id.dialog_date_date_picker);         mdatepicker.init(year, month, day, null);          return new alertdialog.builder(getactivity())                  .setview(v) //                     .settitle(r.string.date_picker_title)                  .setpositivebutton(android.r.string.ok, new dialoginterface.onclicklistener() {                      @override                      public void onclick(dialoginterface dialog, int which) {                          int year = mdatepicker.getyear();                          int month = mdatepicker.getmonth();                          int day = mdatepicker.getdayofmonth();                          date date = new gregoriancalendar(year, month, day).gettime();                          sendresult(activity.result_ok, date);                      }                  })                  .create();         } 

alert dialog has strict (weird?) rules governing it's size. i'm not sure how solve it, there's workaround - once dialog shown can force it's width match date-picker's width. solved me, it'll work too:

public dialog oncreatedialog(bundle savedinstancestate) {     ...     final alertdialog alertdialog = new alertdialog.builder(getactivity())             ...             .create();      alertdialog.setonshowlistener(new dialoginterface.onshowlistener() {         @override public void onshow(dialoginterface dialog) {             windowmanager.layoutparams lp = new windowmanager.layoutparams();             final window window = getdialog().getwindow();             lp.copyfrom(window.getattributes());             final view picker = window.findviewbyid(r.id.dialog_date_date_picker);             lp.width = picker.getwidth();             lp.height = picker.getheight();             window.setattributes(lp);         }     });      return alertdialog; }