Date Picker / DatePicker Dialog

package com.botskool.DatePicker;

 

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.widget.Button;

import android.widget.DatePicker;

import android.widget.TextView;

import android.widget.Toast;

 

public class DatePickerActivity extends Activity {

    /** Private members of the class */

    private TextView pDisplayDate;

    private Button pPickDate;

    private int pYear;

    private int pMonth;

    private int pDay;

    /** This integer will uniquely define the dialog to be used for displaying date picker.*/

    static final int DATE_DIALOG_ID = 0;

     

    /** Callback received when the user "picks" a date in the dialog */

    private DatePickerDialog.OnDateSetListener pDateSetListener =

            new DatePickerDialog.OnDateSetListener() {

 

                public void onDateSet(DatePicker view, int year,

                                      int monthOfYear, int dayOfMonth) {

                    pYear = year;

                    pMonth = monthOfYear;

                    pDay = dayOfMonth;

                    updateDisplay();

                    displayToast();

                }

            };

     

    /** Updates the date in the TextView */

    private void updateDisplay() {

        pDisplayDate.setText(

            new StringBuilder()

                    // Month is 0 based so add 1

                    .append(pMonth + 1).append("/")

                    .append(pDay).append("/")

                    .append(pYear).append(" "));

    }

     

    /** Displays a notification when the date is updated */

    private void displayToast() {

        Toast.makeText(this, new StringBuilder().append("Date choosen is ").append(pDisplayDate.getText()),  Toast.LENGTH_SHORT).show();

             

    }

     

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

 

        /** Capture our View elements */

        pDisplayDate = (TextView) findViewById(R.id.displayDate);

        pPickDate = (Button) findViewById(R.id.pickDate);

 

        /** Listener for click event of the button */

        pPickDate.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {

                showDialog(DATE_DIALOG_ID);

            }

        });

 

        /** Get the current date */

        final Calendar cal = Calendar.getInstance();

        pYear = cal.get(Calendar.YEAR);

        pMonth = cal.get(Calendar.MONTH);

        pDay = cal.get(Calendar.DAY_OF_MONTH);

 

        /** Display the current date in the TextView */

        updateDisplay();

    }

     

    /** Create a new dialog for date picker */

    @Override

    protected Dialog onCreateDialog(int id) {

        switch (id) {

        case DATE_DIALOG_ID:

            return new DatePickerDialog(this,

                        pDateSetListener,

                        pYear, pMonth, pDay);

        }

        return null;

    }

}