[android] How to create a date and time picker in Android?

Call the time picker dialog in the DatePicker update time method. It'll not be called at the same time but when you press DatePicker set button. The time picker dialog will open. The method is given below.

package com.android.date;

import java.util.Calendar;

import android.app.Activity;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;
import android.widget.TimePicker;

public class datepicker extends Activity {

    private TextView mDateDisplay;
    private Button mPickDate;
    private int mYear;
    private int mMonth;
    private int mDay;
    private TextView mTimeDisplay;
    private Button mPickTime;

    private int mhour;
    private int mminute;

    static final int TIME_DIALOG_ID = 1;

    static final int DATE_DIALOG_ID = 0;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        mDateDisplay =(TextView)findViewById(R.id.date);
        mPickDate =(Button)findViewById(R.id.datepicker);
        mTimeDisplay = (TextView) findViewById(R.id.time);
        mPickTime = (Button) findViewById(R.id.timepicker);

        //Pick time's click event listener
        mPickTime.setOnClickListener(new View.OnClickListener(){

            @Override
            public void onClick(View v) {
                showDialog(TIME_DIALOG_ID);
            }
        });

        //PickDate's click event listener 
        mPickDate.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                showDialog(DATE_DIALOG_ID);
            }
        });

        final Calendar c = Calendar.getInstance();
        mYear = c.get(Calendar.YEAR);
        mMonth = c.get(Calendar.MONTH);
        mDay = c.get(Calendar.DAY_OF_MONTH);
        mhour = c.get(Calendar.HOUR_OF_DAY);
        mminute = c.get(Calendar.MINUTE);
    }

    //-------------------------------------------update date---//    
    private void updateDate() {
        mDateDisplay.setText(
            new StringBuilder()
                    // Month is 0 based so add 1
                    .append(mDay).append("/")
                    .append(mMonth + 1).append("/")
                    .append(mYear).append(" "));
        showDialog(TIME_DIALOG_ID);
    }

      //-------------------------------------------update time---//    
    public void updatetime() {
        mTimeDisplay.setText(
                new StringBuilder()
                        .append(pad(mhour)).append(":")
                        .append(pad(mminute))); 
    }

    private static String pad(int c) {
        if (c >= 10)
            return String.valueOf(c);
        else
            return "0" + String.valueOf(c);


    //Datepicker dialog generation  

    private DatePickerDialog.OnDateSetListener mDateSetListener =
        new DatePickerDialog.OnDateSetListener() {

            public void onDateSet(DatePicker view, int year, 
                                  int monthOfYear, int dayOfMonth) {
                mYear = year;
                mMonth = monthOfYear;
                mDay = dayOfMonth;
                updateDate();
            }
        };


     // Timepicker dialog generation
        private TimePickerDialog.OnTimeSetListener mTimeSetListener =
            new TimePickerDialog.OnTimeSetListener() {
                public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                    mhour = hourOfDay;
                    mminute = minute;
                    updatetime();
                }
            };

        @Override
        protected Dialog onCreateDialog(int id) {
            switch (id) {
            case DATE_DIALOG_ID:
                return new DatePickerDialog(this,
                            mDateSetListener,
                            mYear, mMonth, mDay);

            case TIME_DIALOG_ID:
                return new TimePickerDialog(this,
                        mTimeSetListener, mhour, mminute, false);

            }
            return null;
        }
}

the main.xml is given below

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

    <TextView  
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="@string/hello"/>

    <TextView android:id="@+id/time"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""/>

    <Button
        android:id="@+id/timepicker"
        android:text="Change Time" 
        android:layout_height="wrap_content" 
        android:layout_width="wrap_content"/>

    <TextView 
        android:id="@+id/date"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text=""/>

    <Button android:id="@+id/datepicker"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="200dp"
        android:text="Change the date"/>

</LinearLayout>