How to generate a datepicker from a fragment?

I need to create a date picker from a fragment, the problem is that the datepicker that I have seen (examples) are generated from an Activity, and it turns out that for the fragment is not iggual, I need to store a period of time and in the fragment I have 2 button and 2 textview a button and% textview for the beginning of the date and the rest for the completion of it these text view will then be stored in the database in a way integer ... but that's another thing ...

My goal is:

generate the data picker in the fragment

get a start date and a closing date (ie a period of time) (in each button there is a TextView that will load those dates)

ConfigurationPeriodoF.java (this is the fragment)

package company.viral.organizadorjec.FracmentPopUp;

import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.icu.util.Calendar;
import android.icu.util.TimeZone;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.widget.DrawerLayout;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CalendarView;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.PopupWindow;
import android.widget.RelativeLayout;
import android.widget.TextView;

import company.viral.organizadorjec.R;

import static android.content.Context.LAYOUT_INFLATER_SERVICE;


public class ConfiguracionPeriodoF extends Fragment {



    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // mandamos a cargar la imagen del fragment
        View view = inflater.inflate(R.layout.fragment_configuracion_periodo, container, false);

        //creamos las variables que van a interactuar con el layout
        //TextView
        TextView inifecha = (TextView)view.findViewById(R.id.fechaini);
        TextView finalfecha = (TextView)view.findViewById(R.id.fechafinal);
        //botones
        Button btnini = (Button)view.findViewById(R.id.btnfragfecha);
        Button btnfinal = (Button)view.findViewById(R.id.btnfragfinal);


        return view;
    }
}

fragment_configuracion_periodo.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="company.viral.organizadorjec.FracmentPopUp.ConfiguracionPeriodoF">


    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:text="Inserte periodo de trabajo"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/textView2"
            android:gravity="center"
            android:textSize="24sp"
            tools:textColor="@android:color/holo_blue_dark" />

        <Space
            android:layout_width="match_parent"
            android:layout_height="36dp" />

        <EditText
            android:layout_height="wrap_content"
            android:inputType="textPersonName"
            android:ems="10"
            android:id="@+id/etnombreperiodo"
            android:hint="Nombre del periodo a insertar"
            android:gravity="center"
            android:layout_width="match_parent" />

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <Button
                android:text="Inicio"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/btnfragfecha"
                android:layout_weight="1"
                style="@android:style/Widget.Button" />

            <TextView

                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/fechaini"
                android:gravity="center"
                android:textSize="24sp"
                android:layout_weight="1"
                tools:textColor="@android:color/holo_blue_dark" />


        </LinearLayout>

        <Space
            android:layout_width="match_parent"
            android:layout_height="36dp" />

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <Button
                android:text="Final"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/btnfragfinal"
                android:layout_weight="1"
                style="@android:style/Widget.Button" />

            <TextView

                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/fechafinal"
                android:gravity="center"
                android:textSize="24sp"
                android:layout_weight="1"
                tools:textColor="@android:color/holo_blue_dark" />


        </LinearLayout>

        <Space
            android:layout_width="match_parent"
            android:layout_height="36dp" />

        <LinearLayout
            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <Button
                android:text="Agregar"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/agregarperiodo"
                android:layout_weight="1"
                style="@android:style/Widget.Button"/>
            <Button
                android:text="Editar"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:id="@+id/editarperiodo"
                android:layout_weight="1"
                style="@android:style/Widget.Button"/>
        </LinearLayout>

    </LinearLayout>



</FrameLayout>