src/com/android/contacts/datepicker/DatePicker.java - platform/packages/apps/Contacts - Git at Google

 /*
  * Copyright (C) 2007 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.contacts.datepicker;

 // This is a fork of the standard Android DatePicker that additionally allows toggling the year
 // on/off. It uses some private API so that not everything has to be copied.

 import com.android.contacts.R;

 import android.animation.LayoutTransition;
 import android.annotation.Widget;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.text.format.DateFormat;
 import android.util.AttributeSet;
 import android.util.SparseArray;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.CheckBox;
 import android.widget.CompoundButton;
 import android.widget.CompoundButton.OnCheckedChangeListener;
 import android.widget.FrameLayout;
 import android.widget.LinearLayout;
 import android.widget.NumberPicker;
 import android.widget.NumberPicker.OnValueChangeListener;

 import java.text.DateFormatSymbols;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;

 /**
  * A view for selecting a month / year / day based on a calendar like layout.
  *
  * <p>See the <a href="{@docRoot}resources/tutorials/views/hello-datepicker.html">Date Picker
  * tutorial</a>.</p>
  *
  * For a dialog using this view, see {@link android.app.DatePickerDialog}.
  */
 @Widget
 public class DatePicker extends FrameLayout {

     private static final int DEFAULT_START_YEAR = 1900;
     private static final int DEFAULT_END_YEAR = 2100;

     /* UI Components */
     private final LinearLayout mPickerContainer;
     private final CheckBox mYearToggle;
     private final NumberPicker mDayPicker;
     private final NumberPicker mMonthPicker;
     private final NumberPicker mYearPicker;

     /**
      * How we notify users the date has changed.
      */
     private OnDateChangedListener mOnDateChangedListener;

     private int mDay;
     private int mMonth;
     private int mYear;
     private boolean mYearOptional;
     private boolean mHasYear;

     /**
      * The callback used to indicate the user changes the date.
      */
     public interface OnDateChangedListener {

         /**
          * @param view The view associated with this listener.
          * @param year The year that was set.
          * @param monthOfYear The month that was set (0-11) for compatibility
          *  with {@link java.util.Calendar}.
          * @param dayOfMonth The day of the month that was set.
          */
         void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth);
     }

     public DatePicker(Context context) {
         this(context, null);
     }

     public DatePicker(Context context, AttributeSet attrs) {
         this(context, attrs, 0);
     }

     public DatePicker(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);

         LayoutInflater inflater = (LayoutInflater) context.getSystemService(
                 Context.LAYOUT_INFLATER_SERVICE);
         inflater.inflate(R.layout.date_picker, this, true);

         mPickerContainer = (LinearLayout) findViewById(R.id.parent);
         mDayPicker = (NumberPicker) findViewById(R.id.day);
         mDayPicker.setFormatter(NumberPicker.TWO_DIGIT_FORMATTER);
         mDayPicker.setOnLongPressUpdateInterval(100);
         mDayPicker.setOnValueChangedListener(new OnValueChangeListener() {
             @Override
             public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
                 mDay = newVal;
                 notifyDateChanged();
             }
         });
         mMonthPicker = (NumberPicker) findViewById(R.id.month);
         mMonthPicker.setFormatter(NumberPicker.TWO_DIGIT_FORMATTER);
         DateFormatSymbols dfs = new DateFormatSymbols();
         String[] months = dfs.getShortMonths();

         /*
          * If the user is in a locale where the month names are numeric,
          * use just the number instead of the "month" character for
          * consistency with the other fields.
          */
         if (months[0].startsWith("1")) {
             for (int i = 0; i < months.length; i++) {
                 months[i] = String.valueOf(i + 1);
             }
             mMonthPicker.setMinValue(1);
             mMonthPicker.setMaxValue(12);
         } else {
             mMonthPicker.setMinValue(1);
             mMonthPicker.setMaxValue(12);
             mMonthPicker.setDisplayedValues(months);
         }

         mMonthPicker.setOnLongPressUpdateInterval(200);
         mMonthPicker.setOnValueChangedListener(new OnValueChangeListener() {
             @Override
             public void onValueChange(NumberPicker picker, int oldVal, int newVal) {

                 /* We display the month 1-12 but store it 0-11 so always
                  * subtract by one to ensure our internal state is always 0-11
                  */
                 mMonth = newVal - 1;
                 // Adjust max day of the month
                 adjustMaxDay();
                 notifyDateChanged();
                 updateDaySpinner();
             }
         });
         mYearPicker = (NumberPicker) findViewById(R.id.year);
         mYearPicker.setOnLongPressUpdateInterval(100);
         mYearPicker.setOnValueChangedListener(new OnValueChangeListener() {
             @Override
             public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
                 mYear = newVal;
                 // Adjust max day for leap years if needed
                 adjustMaxDay();
                 notifyDateChanged();
                 updateDaySpinner();
             }
         });

         mYearToggle = (CheckBox) findViewById(R.id.yearToggle);
         mYearToggle.setOnCheckedChangeListener(new OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                 mHasYear = isChecked;
                 adjustMaxDay();
                 notifyDateChanged();
                 updateSpinners();
             }
         });

         // attributes
         TypedArray a = context.obtainStyledAttributes(attrs,
                 com.android.internal.R.styleable.DatePicker);

         int mStartYear =
                 a.getInt(com.android.internal.R.styleable.DatePicker_startYear, DEFAULT_START_YEAR);
         int mEndYear =
                 a.getInt(com.android.internal.R.styleable.DatePicker_endYear, DEFAULT_END_YEAR);
         mYearPicker.setMinValue(mStartYear);
         mYearPicker.setMaxValue(mEndYear);

         a.recycle();

         // initialize to current date
         Calendar cal = Calendar.getInstance();
         init(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH), null);

         // re-order the number pickers to match the current date format
         reorderPickers(months);

         mPickerContainer.setLayoutTransition(new LayoutTransition());
         if (!isEnabled()) {
             setEnabled(false);
         }
     }

     @Override
     public void setEnabled(boolean enabled) {
         super.setEnabled(enabled);
         mDayPicker.setEnabled(enabled);
         mMonthPicker.setEnabled(enabled);
         mYearPicker.setEnabled(enabled);
     }

     private void reorderPickers(String[] months) {
         java.text.DateFormat format;
         String order;

         /*
          * If the user is in a locale where the medium date format is
          * still numeric (Japanese and Czech, for example), respect
          * the date format order setting.  Otherwise, use the order
          * that the locale says is appropriate for a spelled-out date.
          */

         if (months[0].startsWith("1")) {
             format = DateFormat.getDateFormat(getContext());
         } else {
             format = DateFormat.getMediumDateFormat(getContext());
         }

         if (format instanceof SimpleDateFormat) {
             order = ((SimpleDateFormat) format).toPattern();
         } else {
             // Shouldn't happen, but just in case.
             order = new String(DateFormat.getDateFormatOrder(getContext()));
         }

         /* Remove the 3 pickers from their parent and then add them back in the
          * required order.
          */
         mPickerContainer.removeAllViews();

         boolean quoted = false;
         boolean didDay = false, didMonth = false, didYear = false;

         for (int i = 0; i < order.length(); i++) {
             char c = order.charAt(i);

             if (c == '\'') {
                 quoted = !quoted;
             }

             if (!quoted) {
                 if (c == DateFormat.DATE && !didDay) {
                     mPickerContainer.addView(mDayPicker);
                     didDay = true;
                 } else if ((c == DateFormat.MONTH || c == 'L') && !didMonth) {
                     mPickerContainer.addView(mMonthPicker);
                     didMonth = true;
                 } else if (c == DateFormat.YEAR && !didYear) {
                     mPickerContainer.addView (mYearPicker);
                     didYear = true;
                 }
             }
         }

         // Shouldn't happen, but just in case.
         if (!didMonth) {
             mPickerContainer.addView(mMonthPicker);
         }
         if (!didDay) {
             mPickerContainer.addView(mDayPicker);
         }
         if (!didYear) {
             mPickerContainer.addView(mYearPicker);
         }
     }

     public void updateDate(int year, int monthOfYear, int dayOfMonth) {
         if (mYear != year || mMonth != monthOfYear || mDay != dayOfMonth) {
             mYear = (mYearOptional && year == 0) ? getCurrentYear() : year;
             mMonth = monthOfYear;
             mDay = dayOfMonth;
             updateSpinners();
             reorderPickers(new DateFormatSymbols().getShortMonths());
             notifyDateChanged();
         }
     }

     private int getCurrentYear() {
         return Calendar.getInstance().get(Calendar.YEAR);
     }

     private static class SavedState extends BaseSavedState {

         private final int mYear;
         private final int mMonth;
         private final int mDay;
         private final boolean mHasYear;
         private final boolean mYearOptional;

         /**
          * Constructor called from {@link DatePicker#onSaveInstanceState()}
          */
         private SavedState(Parcelable superState, int year, int month, int day, boolean hasYear,
                 boolean yearOptional) {
             super(superState);
             mYear = year;
             mMonth = month;
             mDay = day;
             mHasYear = hasYear;
             mYearOptional = yearOptional;
         }

         /**
          * Constructor called from {@link #CREATOR}
          */
         private SavedState(Parcel in) {
             super(in);
             mYear = in.readInt();
             mMonth = in.readInt();
             mDay = in.readInt();
             mHasYear = in.readInt() != 0;
             mYearOptional = in.readInt() != 0;
         }

         public int getYear() {
             return mYear;
         }

         public int getMonth() {
             return mMonth;
         }

         public int getDay() {
             return mDay;
         }

         public boolean hasYear() {
             return mHasYear;
         }

         public boolean isYearOptional() {
             return mYearOptional;
         }

         @Override
         public void writeToParcel(Parcel dest, int flags) {
             super.writeToParcel(dest, flags);
             dest.writeInt(mYear);
             dest.writeInt(mMonth);
             dest.writeInt(mDay);
             dest.writeInt(mHasYear ? 1 : 0);
             dest.writeInt(mYearOptional ? 1 : 0);
         }

         @SuppressWarnings("unused")
         public static final Parcelable.Creator<SavedState> CREATOR =
                 new Creator<SavedState>() {

                     @Override
                     public SavedState createFromParcel(Parcel in) {
                         return new SavedState(in);
                     }

                     @Override
                     public SavedState[] newArray(int size) {
                         return new SavedState[size];
                     }
                 };
     }


     /**
      * Override so we are in complete control of save / restore for this widget.
      */
     @Override
     protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) {
         dispatchThawSelfOnly(container);
     }

     @Override
     protected Parcelable onSaveInstanceState() {
         Parcelable superState = super.onSaveInstanceState();

         return new SavedState(superState, mYear, mMonth, mDay, mHasYear, mYearOptional);
     }

     @Override
     protected void onRestoreInstanceState(Parcelable state) {
         SavedState ss = (SavedState) state;
         super.onRestoreInstanceState(ss.getSuperState());
         mYear = ss.getYear();
         mMonth = ss.getMonth();
         mDay = ss.getDay();
         mHasYear = ss.hasYear();
         mYearOptional = ss.isYearOptional();
         updateSpinners();
     }

     /**
      * Initialize the state.
      * @param year The initial year.
      * @param monthOfYear The initial month.
      * @param dayOfMonth The initial day of the month.
      * @param onDateChangedListener How user is notified date is changed by user, can be null.
      */
     public void init(int year, int monthOfYear, int dayOfMonth,
             OnDateChangedListener onDateChangedListener) {
         init(year, monthOfYear, dayOfMonth, false, onDateChangedListener);
     }

     /**
      * Initialize the state.
      * @param year The initial year or 0 if no year has been specified
      * @param monthOfYear The initial month.
      * @param dayOfMonth The initial day of the month.
      * @param yearOptional True if the user can toggle the year
      * @param onDateChangedListener How user is notified date is changed by user, can be null.
      */
     public void init(int year, int monthOfYear, int dayOfMonth, boolean yearOptional,
             OnDateChangedListener onDateChangedListener) {
         mYear = (yearOptional && year == 0) ? getCurrentYear() : year;
         mMonth = monthOfYear;
         mDay = dayOfMonth;
         mYearOptional = yearOptional;
         mHasYear = yearOptional ? (year != 0) : true;
         mOnDateChangedListener = onDateChangedListener;
         updateSpinners();
     }

     private void updateSpinners() {
         updateDaySpinner();
         mYearToggle.setChecked(mHasYear);
         mYearToggle.setVisibility(mYearOptional ? View.VISIBLE : View.GONE);
         mYearPicker.setValue(mYear);
         mYearPicker.setVisibility(mHasYear ? View.VISIBLE : View.GONE);

         /* The month display uses 1-12 but our internal state stores it
          * 0-11 so add one when setting the display.
          */
         mMonthPicker.setValue(mMonth + 1);
     }

     private void updateDaySpinner() {
         Calendar cal = Calendar.getInstance();
         // if year was not set, use 2000 as it was a leap year
         cal.set(mHasYear ? mYear : 2000, mMonth, 1);
         int max = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
         mDayPicker.setMinValue(1);
         mDayPicker.setMaxValue(max);
         mDayPicker.setValue(mDay);
     }

     public int getYear() {
         return (mYearOptional && !mHasYear) ? 0 : mYear;
     }

     public boolean isYearOptional() {
         return mYearOptional;
     }

     public int getMonth() {
         return mMonth;
     }

     public int getDayOfMonth() {
         return mDay;
     }

     private void adjustMaxDay(){
         Calendar cal = Calendar.getInstance();
         // if year was not set, use 2000 as it was a leap year
         cal.set(Calendar.YEAR, mHasYear ? mYear : 2000);
         cal.set(Calendar.MONTH, mMonth);
         int max = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
         if (mDay > max) {
             mDay = max;
         }
     }

     private void notifyDateChanged() {
         if (mOnDateChangedListener != null) {
             int year = (mYearOptional && !mHasYear) ? 0 : mYear;
             mOnDateChangedListener.onDateChanged(DatePicker.this, year, mMonth, mDay);
         }
     }
 }
	/*
	* Copyright (C) 2007 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.contacts.datepicker;

	// This is a fork of the standard Android DatePicker that additionally allows toggling the year
	// on/off. It uses some private API so that not everything has to be copied.

	import com.android.contacts.R;

	import android.animation.LayoutTransition;
	import android.annotation.Widget;
	import android.content.Context;
	import android.content.res.TypedArray;
	import android.os.Parcel;
	import android.os.Parcelable;
	import android.text.format.DateFormat;
	import android.util.AttributeSet;
	import android.util.SparseArray;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.widget.CheckBox;
	import android.widget.CompoundButton;
	import android.widget.CompoundButton.OnCheckedChangeListener;
	import android.widget.FrameLayout;
	import android.widget.LinearLayout;
	import android.widget.NumberPicker;
	import android.widget.NumberPicker.OnValueChangeListener;

	import java.text.DateFormatSymbols;
	import java.text.SimpleDateFormat;
	import java.util.Calendar;

	/**
	* A view for selecting a month / year / day based on a calendar like layout.
	*
	* <p>See the <a href="{@docRoot}resources/tutorials/views/hello-datepicker.html">Date Picker
	* tutorial</a>.</p>
	*
	* For a dialog using this view, see {@link android.app.DatePickerDialog}.
	*/
	@Widget
	public class DatePicker extends FrameLayout {

	private static final int DEFAULT_START_YEAR = 1900;
	private static final int DEFAULT_END_YEAR = 2100;

	/* UI Components */
	private final LinearLayout mPickerContainer;
	private final CheckBox mYearToggle;
	private final NumberPicker mDayPicker;
	private final NumberPicker mMonthPicker;
	private final NumberPicker mYearPicker;

	/**
	* How we notify users the date has changed.
	*/
	private OnDateChangedListener mOnDateChangedListener;

	private int mDay;
	private int mMonth;
	private int mYear;
	private boolean mYearOptional;
	private boolean mHasYear;

	/**
	* The callback used to indicate the user changes the date.
	*/
	public interface OnDateChangedListener {

	/**
	* @param view The view associated with this listener.
	* @param year The year that was set.
	* @param monthOfYear The month that was set (0-11) for compatibility
	* with {@link java.util.Calendar}.
	* @param dayOfMonth The day of the month that was set.
	*/
	void onDateChanged(DatePicker view, int year, int monthOfYear, int dayOfMonth);
	}

	public DatePicker(Context context) {
	this(context, null);
	}

	public DatePicker(Context context, AttributeSet attrs) {
	this(context, attrs, 0);
	}

	public DatePicker(Context context, AttributeSet attrs, int defStyle) {
	super(context, attrs, defStyle);

	LayoutInflater inflater = (LayoutInflater) context.getSystemService(
	Context.LAYOUT_INFLATER_SERVICE);
	inflater.inflate(R.layout.date_picker, this, true);

	mPickerContainer = (LinearLayout) findViewById(R.id.parent);
	mDayPicker = (NumberPicker) findViewById(R.id.day);
	mDayPicker.setFormatter(NumberPicker.TWO_DIGIT_FORMATTER);
	mDayPicker.setOnLongPressUpdateInterval(100);
	mDayPicker.setOnValueChangedListener(new OnValueChangeListener() {
	@Override
	public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
	mDay = newVal;
	notifyDateChanged();
	}
	});
	mMonthPicker = (NumberPicker) findViewById(R.id.month);
	mMonthPicker.setFormatter(NumberPicker.TWO_DIGIT_FORMATTER);
	DateFormatSymbols dfs = new DateFormatSymbols();
	String[] months = dfs.getShortMonths();

	/*
	* If the user is in a locale where the month names are numeric,
	* use just the number instead of the "month" character for
	* consistency with the other fields.
	*/
	if (months[0].startsWith("1")) {
	for (int i = 0; i < months.length; i++) {
	months[i] = String.valueOf(i + 1);
	}
	mMonthPicker.setMinValue(1);
	mMonthPicker.setMaxValue(12);
	} else {
	mMonthPicker.setMinValue(1);
	mMonthPicker.setMaxValue(12);
	mMonthPicker.setDisplayedValues(months);
	}

	mMonthPicker.setOnLongPressUpdateInterval(200);
	mMonthPicker.setOnValueChangedListener(new OnValueChangeListener() {
	@Override
	public void onValueChange(NumberPicker picker, int oldVal, int newVal) {

	/* We display the month 1-12 but store it 0-11 so always
	* subtract by one to ensure our internal state is always 0-11
	*/
	mMonth = newVal - 1;
	// Adjust max day of the month
	adjustMaxDay();
	notifyDateChanged();
	updateDaySpinner();
	}
	});
	mYearPicker = (NumberPicker) findViewById(R.id.year);
	mYearPicker.setOnLongPressUpdateInterval(100);
	mYearPicker.setOnValueChangedListener(new OnValueChangeListener() {
	@Override
	public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
	mYear = newVal;
	// Adjust max day for leap years if needed
	adjustMaxDay();
	notifyDateChanged();
	updateDaySpinner();
	}
	});

	mYearToggle = (CheckBox) findViewById(R.id.yearToggle);
	mYearToggle.setOnCheckedChangeListener(new OnCheckedChangeListener() {
	@Override
	public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
	mHasYear = isChecked;
	adjustMaxDay();
	notifyDateChanged();
	updateSpinners();
	}
	});

	// attributes
	TypedArray a = context.obtainStyledAttributes(attrs,
	com.android.internal.R.styleable.DatePicker);

	int mStartYear =
	a.getInt(com.android.internal.R.styleable.DatePicker_startYear, DEFAULT_START_YEAR);
	int mEndYear =
	a.getInt(com.android.internal.R.styleable.DatePicker_endYear, DEFAULT_END_YEAR);
	mYearPicker.setMinValue(mStartYear);
	mYearPicker.setMaxValue(mEndYear);

	a.recycle();

	// initialize to current date
	Calendar cal = Calendar.getInstance();
	init(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DAY_OF_MONTH), null);

	// re-order the number pickers to match the current date format
	reorderPickers(months);

	mPickerContainer.setLayoutTransition(new LayoutTransition());
	if (!isEnabled()) {
	setEnabled(false);
	}
	}

	@Override
	public void setEnabled(boolean enabled) {
	super.setEnabled(enabled);
	mDayPicker.setEnabled(enabled);
	mMonthPicker.setEnabled(enabled);
	mYearPicker.setEnabled(enabled);
	}

	private void reorderPickers(String[] months) {
	java.text.DateFormat format;
	String order;

	/*
	* If the user is in a locale where the medium date format is
	* still numeric (Japanese and Czech, for example), respect
	* the date format order setting. Otherwise, use the order
	* that the locale says is appropriate for a spelled-out date.
	*/

	if (months[0].startsWith("1")) {
	format = DateFormat.getDateFormat(getContext());
	} else {
	format = DateFormat.getMediumDateFormat(getContext());
	}

	if (format instanceof SimpleDateFormat) {
	order = ((SimpleDateFormat) format).toPattern();
	} else {
	// Shouldn't happen, but just in case.
	order = new String(DateFormat.getDateFormatOrder(getContext()));
	}

	/* Remove the 3 pickers from their parent and then add them back in the
	* required order.
	*/
	mPickerContainer.removeAllViews();

	boolean quoted = false;
	boolean didDay = false, didMonth = false, didYear = false;

	for (int i = 0; i < order.length(); i++) {
	char c = order.charAt(i);

	if (c == '\'') {
	quoted = !quoted;
	}

	if (!quoted) {
	if (c == DateFormat.DATE && !didDay) {
	mPickerContainer.addView(mDayPicker);
	didDay = true;
	} else if ((c == DateFormat.MONTH \|\| c == 'L') && !didMonth) {
	mPickerContainer.addView(mMonthPicker);
	didMonth = true;
	} else if (c == DateFormat.YEAR && !didYear) {
	mPickerContainer.addView (mYearPicker);
	didYear = true;
	}
	}
	}

	// Shouldn't happen, but just in case.
	if (!didMonth) {
	mPickerContainer.addView(mMonthPicker);
	}
	if (!didDay) {
	mPickerContainer.addView(mDayPicker);
	}
	if (!didYear) {
	mPickerContainer.addView(mYearPicker);
	}
	}

	public void updateDate(int year, int monthOfYear, int dayOfMonth) {
	if (mYear != year \|\| mMonth != monthOfYear \|\| mDay != dayOfMonth) {
	mYear = (mYearOptional && year == 0) ? getCurrentYear() : year;
	mMonth = monthOfYear;
	mDay = dayOfMonth;
	updateSpinners();
	reorderPickers(new DateFormatSymbols().getShortMonths());
	notifyDateChanged();
	}
	}

	private int getCurrentYear() {
	return Calendar.getInstance().get(Calendar.YEAR);
	}

	private static class SavedState extends BaseSavedState {

	private final int mYear;
	private final int mMonth;
	private final int mDay;
	private final boolean mHasYear;
	private final boolean mYearOptional;

	/**
	* Constructor called from {@link DatePicker#onSaveInstanceState()}
	*/
	private SavedState(Parcelable superState, int year, int month, int day, boolean hasYear,
	boolean yearOptional) {
	super(superState);
	mYear = year;
	mMonth = month;
	mDay = day;
	mHasYear = hasYear;
	mYearOptional = yearOptional;
	}

	/**
	* Constructor called from {@link #CREATOR}
	*/
	private SavedState(Parcel in) {
	super(in);
	mYear = in.readInt();
	mMonth = in.readInt();
	mDay = in.readInt();
	mHasYear = in.readInt() != 0;
	mYearOptional = in.readInt() != 0;
	}

	public int getYear() {
	return mYear;
	}

	public int getMonth() {
	return mMonth;
	}

	public int getDay() {
	return mDay;
	}

	public boolean hasYear() {
	return mHasYear;
	}

	public boolean isYearOptional() {
	return mYearOptional;
	}

	@Override
	public void writeToParcel(Parcel dest, int flags) {
	super.writeToParcel(dest, flags);
	dest.writeInt(mYear);
	dest.writeInt(mMonth);
	dest.writeInt(mDay);
	dest.writeInt(mHasYear ? 1 : 0);
	dest.writeInt(mYearOptional ? 1 : 0);
	}

	@SuppressWarnings("unused")
	public static final Parcelable.Creator<SavedState> CREATOR =
	new Creator<SavedState>() {

	@Override
	public SavedState createFromParcel(Parcel in) {
	return new SavedState(in);
	}

	@Override
	public SavedState[] newArray(int size) {
	return new SavedState[size];
	}
	};
	}


	/**
	* Override so we are in complete control of save / restore for this widget.
	*/
	@Override
	protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) {
	dispatchThawSelfOnly(container);
	}

	@Override
	protected Parcelable onSaveInstanceState() {
	Parcelable superState = super.onSaveInstanceState();

	return new SavedState(superState, mYear, mMonth, mDay, mHasYear, mYearOptional);
	}

	@Override
	protected void onRestoreInstanceState(Parcelable state) {
	SavedState ss = (SavedState) state;
	super.onRestoreInstanceState(ss.getSuperState());
	mYear = ss.getYear();
	mMonth = ss.getMonth();
	mDay = ss.getDay();
	mHasYear = ss.hasYear();
	mYearOptional = ss.isYearOptional();
	updateSpinners();
	}

	/**
	* Initialize the state.
	* @param year The initial year.
	* @param monthOfYear The initial month.
	* @param dayOfMonth The initial day of the month.
	* @param onDateChangedListener How user is notified date is changed by user, can be null.
	*/
	public void init(int year, int monthOfYear, int dayOfMonth,
	OnDateChangedListener onDateChangedListener) {
	init(year, monthOfYear, dayOfMonth, false, onDateChangedListener);
	}

	/**
	* Initialize the state.
	* @param year The initial year or 0 if no year has been specified
	* @param monthOfYear The initial month.
	* @param dayOfMonth The initial day of the month.
	* @param yearOptional True if the user can toggle the year
	* @param onDateChangedListener How user is notified date is changed by user, can be null.
	*/
	public void init(int year, int monthOfYear, int dayOfMonth, boolean yearOptional,
	OnDateChangedListener onDateChangedListener) {
	mYear = (yearOptional && year == 0) ? getCurrentYear() : year;
	mMonth = monthOfYear;
	mDay = dayOfMonth;
	mYearOptional = yearOptional;
	mHasYear = yearOptional ? (year != 0) : true;
	mOnDateChangedListener = onDateChangedListener;
	updateSpinners();
	}

	private void updateSpinners() {
	updateDaySpinner();
	mYearToggle.setChecked(mHasYear);
	mYearToggle.setVisibility(mYearOptional ? View.VISIBLE : View.GONE);
	mYearPicker.setValue(mYear);
	mYearPicker.setVisibility(mHasYear ? View.VISIBLE : View.GONE);

	/* The month display uses 1-12 but our internal state stores it
	* 0-11 so add one when setting the display.
	*/
	mMonthPicker.setValue(mMonth + 1);
	}

	private void updateDaySpinner() {
	Calendar cal = Calendar.getInstance();
	// if year was not set, use 2000 as it was a leap year
	cal.set(mHasYear ? mYear : 2000, mMonth, 1);
	int max = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
	mDayPicker.setMinValue(1);
	mDayPicker.setMaxValue(max);
	mDayPicker.setValue(mDay);
	}

	public int getYear() {
	return (mYearOptional && !mHasYear) ? 0 : mYear;
	}

	public boolean isYearOptional() {
	return mYearOptional;
	}

	public int getMonth() {
	return mMonth;
	}

	public int getDayOfMonth() {
	return mDay;
	}

	private void adjustMaxDay(){
	Calendar cal = Calendar.getInstance();
	// if year was not set, use 2000 as it was a leap year
	cal.set(Calendar.YEAR, mHasYear ? mYear : 2000);
	cal.set(Calendar.MONTH, mMonth);
	int max = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
	if (mDay > max) {
	mDay = max;
	}
	}

	private void notifyDateChanged() {
	if (mOnDateChangedListener != null) {
	int year = (mYearOptional && !mHasYear) ? 0 : mYear;
	mOnDateChangedListener.onDateChanged(DatePicker.this, year, mMonth, mDay);
	}
	}
	}