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 it is not the same for fragments, I need to store a period of time and in the fragment I have 2 buttonand 2 textviewone buttonand one textviewfor the start of the date and the rest for the end of the date, these text views will then be stored in the database in the form integer... but that's another thing...

my objective is:

generate the data picker in the fragment

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

ConfiguracionPeriodoF.java (this is the snippet)

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_configuration_period.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>