how we can use DatePickerDialog in android

In this blog we will read how we can use DatePickerDialog in android . DatePikcerDialog in android allows user to select date . DatePickerDialog allows user to select day,month and year in our application.

activity_main.xml

In xml file we will use a button and a Textview . when user click on button he will see a Dialog and he can select date from that dialog. Which date user select will be visible in text view and you can see complete code for activity_main.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

<Button
    android:layout_width="wrap_content"
    android:id="@+id/date_picker"
    android:text="@string/select_date"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:layout_height="wrap_content"/>

    <TextView
        android:layout_width="wrap_content"
        android:text="@string/select_date"
        android:id="@+id/text"
        android:layout_height="wrap_content"/>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:orientation="vertical"

android:layout_height="match_parent"

tools:context=".MainActivity">

<Button

android:layout_width="wrap_content"

android:id="@+id/date_picker"

android:text="@string/select_date"

android:layout_centerHorizontal="true"

android:layout_centerVertical="true"

android:layout_height="wrap_content"/>

<TextView

android:layout_width="wrap_content"

android:text="@string/select_date"

android:id="@+id/text"

android:layout_height="wrap_content"/>

</RelativeLayout>

DatePickerDialog select date from instance of Calendar so we use get Instance method. check below code and See how can we get instance of Calendar.

    final Calendar myCalendar = Calendar.getInstance();

1	final Calendar myCalendar = Calendar.getInstance();

If you want to set date so use OnDateSetListener() interface .check and see below to set date from date picker dialog.

 DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {

        @Override
        public void onDateSet(DatePicker view, int year, int monthOfYear,
                              int dayOfMonth) {
            myCalendar.set(Calendar.YEAR, year);
            myCalendar.set(Calendar.MONTH, monthOfYear);
            myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
            TextView editText= findViewById(R.id.text);
            editText.setText(dayOfMonth+" "+monthOfYear +" "+year);
        }
    };

DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {

@Override

public void onDateSet(DatePicker view, int year, int monthOfYear,

int dayOfMonth) {

myCalendar.set(Calendar.YEAR, year);

myCalendar.set(Calendar.MONTH, monthOfYear);

myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);

TextView editText= findViewById(R.id.text);

editText.setText(dayOfMonth+" "+monthOfYear +" "+year);

}

};

Initialize date picker dialog and send needed parameter .

 DatePickerDialog datePickerDialog=  new DatePickerDialog(this,R.style.DialogTheme, date, myCalendar
                .get(Calendar.YEAR), myCalendar.get(Calendar.MONTH),myCalendar.get(Calendar.DAY_OF_MONTH));
        datePickerDialog.show();

DatePickerDialog datePickerDialog= new DatePickerDialog(this,R.style.DialogTheme, date, myCalendar

.get(Calendar.YEAR), myCalendar.get(Calendar.MONTH),myCalendar.get(Calendar.DAY_OF_MONTH));

datePickerDialog.show();

MainActivity

In MainActivity you can we use a click listener when you click on button it will show a dialog and here you can select date.

package com.example.datepicker;

import androidx.appcompat.app.AppCompatActivity;

import android.app.DatePickerDialog;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    final Calendar myCalendar = Calendar.getInstance();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button datePickerBtn=(Button) findViewById(R.id.date_picker);
        datePickerBtn.setOnClickListener(this);

    }

    DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {

        @Override
        public void onDateSet(DatePicker view, int year, int monthOfYear,
                              int dayOfMonth) {
            myCalendar.set(Calendar.YEAR, year);
            myCalendar.set(Calendar.MONTH, monthOfYear);
            myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
            TextView editText= findViewById(R.id.text);
            editText.setText(dayOfMonth+" "+monthOfYear +" "+year);
        }
    };


    @Override
    public void onClick(View v) {
        DatePickerDialog datePickerDialog=  new DatePickerDialog(this,R.style.DialogTheme, date, myCalendar
                .get(Calendar.YEAR), myCalendar.get(Calendar.MONTH),myCalendar.get(Calendar.DAY_OF_MONTH));
        datePickerDialog.show();

    }
}

package com.example.datepicker;

import androidx.appcompat.app.AppCompatActivity;

import android.app.DatePickerDialog;

import android.graphics.Color;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.DatePicker;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

final Calendar myCalendar = Calendar.getInstance();

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Button datePickerBtn=(Button) findViewById(R.id.date_picker);

datePickerBtn.setOnClickListener(this);

}

DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {

@Override

public void onDateSet(DatePicker view, int year, int monthOfYear,

int dayOfMonth) {

myCalendar.set(Calendar.YEAR, year);

myCalendar.set(Calendar.MONTH, monthOfYear);

myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);

TextView editText= findViewById(R.id.text);

editText.setText(dayOfMonth+" "+monthOfYear +" "+year);

}

};

@Override

public void onClick(View v) {

DatePickerDialog datePickerDialog= new DatePickerDialog(this,R.style.DialogTheme, date, myCalendar

.get(Calendar.YEAR), myCalendar.get(Calendar.MONTH),myCalendar.get(Calendar.DAY_OF_MONTH));

datePickerDialog.show();

}

You can change background color and button colors. In style you can provide negative button and positive button .

styles.xml

<style name="DialogTheme" parent="Theme.AppCompat.Light.Dialog">

        <item name="colorPrimary">#00ffff</item>
        <item name="colorPrimaryDark">#987654</item>
        <item name="colorAccent">#ff00ff</item>
        <item name="android:buttonBarNegativeButtonStyle" >@style/NegativeButtonStyle</item>
        <item name="android:buttonBarPositiveButtonStyle">@style/NegativeButtonStyle</item>

    </style>

    <style name="NegativeButtonStyle" parent="Widget.AppCompat.Button.ButtonBar.AlertDialog">
        <item name="android:textColor">#ff00ff</item>
    </style>