learntodroid

package com.learntodroid.datepicker;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;

import java.util.Calendar;

learntodroid

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">

    <DatePicker
        android:id="@+id/date_picker"
        android:layout_width="match_parent"

learntodroid

package com.learntodroid.datepicker;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;

import java.util.Calendar;

learntodroid

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.learntodroid.materialdatepicker"
        minSdkVersion 16
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"

learntodroid

package com.learntodroid.materialdatepicker;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import java.util.Calendar;

import androidx.appcompat.app.AppCompatActivity;

learntodroid

<androidx.coordinatorlayout.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.google.android.material.appbar.AppBarLayout
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:theme="@style/ThemeOverlay.AppCompat.Dark">

learntodroid

<?xml version="1.0" encoding="utf-8"?>
<androidx.core.widget.NestedScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

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

learntodroid

package com.learntodroid.materialdatepicker;

import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

learntodroid

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

        <LinearLayout
            android:layout_width="0dp"
            android:layout_weight="30"
            android:layout_height="wrap_content"

learntodroid

<TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/countDownText"
        android:text="Count down not started"
        android:layout_gravity="center"
        />

    <LinearLayout
        android:layout_width="match_parent"