Android date picker example

In Android, you can use “android.widget.DatePicker” class to render a date picker component to select day, month and year in a pre-defined user interface.

In this tutorial, we show you how to render date picker component in current page via android.widget.DatePicker, and also in dialog box via android.app.DatePickerDialog. In addition, we also show you how to set a date in date picker component.

P.S This project is developed in Eclipse 3.7, and tested with Android 2.3.3.

1. DatePicker

Open “res/layout/main.xml” file, add date picker, label and button for demonstration.

File : res/layout/main.xml

<?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" >
 
    <Button
        android:id="@+id/btnChangeDate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Change Date" />
 
    <TextView
        android:id="@+id/lblDate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Current Date (M-D-YYYY): "
        android:textAppearance="?android:attr/textAppearanceLarge" />
 
    <TextView
        android:id="@+id/tvDate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""
        android:textAppearance="?android:attr/textAppearanceLarge" />
 
    <DatePicker
        android:id="@+id/dpResult"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
 
</LinearLayout>

P.S The “DatePickerDialog” is declare in code, not XML.

2. Code Code

Read the code’s comment, it should be self-explanatory.

File : MyAndroidAppActivity.java

package com.mkyong.android;
 
import java.util.Calendar;
import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;
 
public class MyAndroidAppActivity extends Activity {
 
	private TextView tvDisplayDate;
	private DatePicker dpResult;
	private Button btnChangeDate;
 
	private int year;
	private int month;
	private int day;
 
	static final int DATE_DIALOG_ID = 999;
 
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
 
		setCurrentDateOnView();
		addListenerOnButton();
 
	}
 
	// display current date
	public void setCurrentDateOnView() {
 
		tvDisplayDate = (TextView) findViewById(R.id.tvDate);
		dpResult = (DatePicker) findViewById(R.id.dpResult);
 
		final Calendar c = Calendar.getInstance();
		year = c.get(Calendar.YEAR);
		month = c.get(Calendar.MONTH);
		day = c.get(Calendar.DAY_OF_MONTH);
 
		// set current date into textview
		tvDisplayDate.setText(new StringBuilder()
			// Month is 0 based, just add 1
			.append(month + 1).append("-").append(day).append("-")
			.append(year).append(" "));
 
		// set current date into datepicker
		dpResult.init(year, month, day, null);
 
	}
 
	public void addListenerOnButton() {
 
		btnChangeDate = (Button) findViewById(R.id.btnChangeDate);
 
		btnChangeDate.setOnClickListener(new OnClickListener() {
 
			@Override
			public void onClick(View v) {
 
				showDialog(DATE_DIALOG_ID);
 
			}
 
		});
 
	}
 
	@Override
	protected Dialog onCreateDialog(int id) {
		switch (id) {
		case DATE_DIALOG_ID:
		   // set date picker as current date
		   return new DatePickerDialog(this, datePickerListener, 
                         year, month,day);
		}
		return null;
	}
 
	private DatePickerDialog.OnDateSetListener datePickerListener 
                = new DatePickerDialog.OnDateSetListener() {
 
		// when dialog box is closed, below method will be called.
		public void onDateSet(DatePicker view, int selectedYear,
				int selectedMonth, int selectedDay) {
			year = selectedYear;
			month = selectedMonth;
			day = selectedDay;
 
			// set selected date into textview
			tvDisplayDate.setText(new StringBuilder().append(month + 1)
			   .append("-").append(day).append("-").append(year)
			   .append(" "));
 
			// set selected date into datepicker also
			dpResult.init(year, month, day, null);
 
		}
	};
 
}