Issue on Datepicker Dialogue

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Android

i am able to display Datepicker after clicking the EditText within my mani activity.
now i want to decrease the popup window size.I have tried this for 4 hours but i could't.
And i defined one interface with in Dialogfragment class for transfer Date as a string to Main activity to display to the end user.
My code is working properly without having any problem.But i want to Decrease the popup size of datepicker dialouge.waiting for all your response.....
please help me to find a way.

Myentire code is givenn below:

My mainactivity xml file contains(activity_main.xml):-

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android">
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/r1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.annomap.datepicker.MainActivity" >

<textview>
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:text="Pick Date Time" />

<edittext>
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/textView1"
android:layout_alignParentRight="true"
android:ems="10"
android:inputType="date" />



Main activity class code is(Mainactivity.java):-

package com.annomap.datepicker;

import java.util.Calendar;

import com.annomap.datepicker.DatePickerFragment.Idatesetting;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class MainActivity extends Activity implements Idatesetting {
static EditText DateEdit;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//getting relativelayout id
DateEdit = (EditText) findViewById(R.id.editText1);
DateEdit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

showTruitonDatePickerDialog(v);
}
});
}

public void showTruitonDatePickerDialog(View v) {
DatePickerFragment newFragment = new DatePickerFragment();
//newFragment.setListener(this);
newFragment.show(getFragmentManager(), "datePicker");
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public void returnDate(String date) {
// TODO Auto-generated method stub
DateEdit.setText(date);

}

}

And my Dialogue fragment class:-

package com.annomap.datepicker;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Locale;
import android.R.drawable;
import android.R.integer;
import android.annotation.SuppressLint;
import android.app.DatePickerDialog;
import android.app.DatePickerDialog.OnDateSetListener;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.os.Bundle;
import android.webkit.WebView.FindListener;
import android.widget.DatePicker;
import android.widget.TextView;
import android.app.AlertDialog;
public class DatePickerFragment extends DialogFragment implements
OnDateSetListener {
private Idatesetting listener;

// define Interface
public interface Idatesetting {
public void returnDate(String date);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
setListener((Idatesetting) activity);
}
@SuppressWarnings("deprecation")
@SuppressLint("NewApi")
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current date as the default date in the 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);


DatePickerDialog datepickerdialog = new DatePickerDialog(getActivity(),
this, year, month, day);
datepickerdialog.getDatePicker().setCalendarViewShown(true);
datepickerdialog.getDatePicker().setSpinnersShown(false);
datepickerdialog.getDatePicker().setX(250);
datepickerdialog.getDatePicker().setY(-20);
return datepickerdialog;
}
@SuppressWarnings("null")
public void onDateSet(DatePicker view, int year, int month, int day) {
// Do something with the date chosen by the user
Calendar c = Calendar.getInstance();
c.set(year, month, day);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String formattedDate = sdf.format(c.getTime());
getListener().returnDate(formattedDate);
}
public Idatesetting getListener() {
return listener;
}
public void setListener(Idatesetting listener) {
this.listener = listener;
}
}