/*
* Copyright (C) 2016 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 android.widget;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.icu.util.Calendar;
import android.os.Parcelable;
import android.text.InputType;
import android.text.TextUtils;
import android.text.format.DateFormat;
import android.text.format.DateUtils;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.accessibility.AccessibilityEvent;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputMethodManager;
import android.widget.DatePicker.AbstractDatePickerDelegate;
import android.widget.NumberPicker.OnValueChangeListener;
import java.text.DateFormatSymbols;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Locale;
import libcore.icu.ICU;
/**
* A delegate implementing the basic DatePicker
*/
class DatePickerSpinnerDelegate extends AbstractDatePickerDelegate {
private static final String DATE_FORMAT = "MM/dd/yyyy";
private static final int DEFAULT_START_YEAR = 1900;
private static final int DEFAULT_END_YEAR = 2100;
private static final boolean DEFAULT_CALENDAR_VIEW_SHOWN = true;
private static final boolean DEFAULT_SPINNERS_SHOWN = true;
private static final boolean DEFAULT_ENABLED_STATE = true;
private final LinearLayout mSpinners;
private final NumberPicker mDaySpinner;
private final NumberPicker mMonthSpinner;
private final NumberPicker mYearSpinner;
private final EditText mDaySpinnerInput;
private final EditText mMonthSpinnerInput;
private final EditText mYearSpinnerInput;
private final CalendarView mCalendarView;
private String[] mShortMonths;
private final java.text.DateFormat mDateFormat = new SimpleDateFormat(DATE_FORMAT);
private int mNumberOfMonths;
private Calendar mTempDate;
private Calendar mMinDate;
private Calendar mMaxDate;
private Calendar mCurrentDate;
private boolean mIsEnabled = DEFAULT_ENABLED_STATE;
DatePickerSpinnerDelegate(DatePicker delegator, Context context, AttributeSet attrs,
int defStyleAttr, int defStyleRes) {
super(delegator, context);
mDelegator = delegator;
mContext = context;
// initialization based on locale
setCurrentLocale(Locale.getDefault());
final TypedArray attributesArray = context.obtainStyledAttributes(attrs,
com.android.internal.R.styleable.DatePicker, defStyleAttr, defStyleRes);
boolean spinnersShown = attributesArray.getBoolean(com.android.internal.R.styleable.DatePicker_spinnersShown,
DEFAULT_SPINNERS_SHOWN);
boolean calendarViewShown = attributesArray.getBoolean(
com.android.internal.R.styleable.DatePicker_calendarViewShown, DEFAULT_CALENDAR_VIEW_SHOWN);
int startYear = attributesArray.getInt(com.android.internal.R.styleable.DatePicker_startYear,
DEFAULT_START_YEAR);
int endYear = attributesArray.getInt(com.android.internal.R.styleable.DatePicker_endYear, DEFAULT_END_YEAR);
String minDate = attributesArray.getString(com.android.internal.R.styleable.DatePicker_minDate);
String maxDate = attributesArray.getString(com.android.internal.R.styleable.DatePicker_maxDate);
int layoutResourceId = attributesArray.getResourceId(
com.android.internal.R.styleable.DatePicker_legacyLayout, com.android.internal.R.layout.date_picker_legacy);
attributesArray.recycle();
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(layoutResourceId, mDelegator, true);
OnValueChangeListener onChangeListener = new OnValueChangeListener() {
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
updateInputState();
mTempDate.setTimeInMillis(mCurrentDate.getTimeInMillis());
// take care of wrapping of days and months to update greater fields
if (picker == mDaySpinner) {
int maxDayOfMonth = mTempDate.getActualMaximum(Calendar.DAY_OF_MONTH);
if (oldVal == maxDayOfMonth && newVal == 1) {
mTempDate.add(Calendar.DAY_OF_MONTH, 1);
} else if (oldVal == 1 && newVal == maxDayOfMonth) {
mTempDate.add(Calendar.DAY_OF_MONTH, -1);
} else {
mTempDate.add(Calendar.DAY_OF_MONTH, newVal - oldVal);
}
} else if (picker == mMonthSpinner) {
if (oldVal == 11 && newVal == 0) {
mTempDate.add(Calendar.MONTH, 1);
} else if (oldVal == 0 && newVal == 11) {
mTempDate.add(Calendar.MONTH, -1);
} else {
mTempDate.add(Calendar.MONTH, newVal - oldVal);
}
} else if (picker == mYearSpinner) {
mTempDate.set(Calendar.YEAR, newVal);
} else {
throw new IllegalArgumentException();
}
// now set the date to the adjusted one
setDate(mTempDate.get(Calendar.YEAR), mTempDate.get(Calendar.MONTH),
mTempDate.get(Calendar.DAY_OF_MONTH));
updateSpinners();
updateCalendarView();
notifyDateChanged();
}
};
mSpinners = (LinearLayout) mDelegator.findViewById(com.android.internal.R.id.pickers);
// calendar view day-picker
mCalendarView = (CalendarView) mDelegator.findViewById(com.android.internal.R.id.calendar_view);
mCalendarView.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {
public void onSelectedDayChange(CalendarView view, int year, int month, int monthDay) {
setDate(year, month, monthDay);
updateSpinners();
notifyDateChanged();
}
});
// day
mDaySpinner = (NumberPicker) mDelegator.findViewById(com.android.internal.R.id.day);
mDaySpinner.setFormatter(NumberPicker.getTwoDigitFormatter());
mDaySpinner.setOnLongPressUpdateInterval(100);
mDaySpinner.setOnValueChangedListener(onChangeListener);
mDaySpinnerInput = (EditText) mDaySpinner.findViewById(com.android.internal.R.id.numberpicker_input);
// month
mMonthSpinner = (NumberPicker) mDelegator.findViewById(com.android.internal.R.id.month);
mMonthSpinner.setMinValue(0);
mMonthSpinner.setMaxValue(mNumberOfMonths - 1);
mMonthSpinner.setDisplayedValues(mShortMonths);
mMonthSpinner.setOnLongPressUpdateInterval(200);
mMonthSpinner.setOnValueChangedListener(onChangeListener);
mMonthSpinnerInput = (EditText) mMonthSpinner.findViewById(com.android.internal.R.id.numberpicker_input);
// year
mYearSpinner = (NumberPicker) mDelegator.findViewById(com.android.internal.R.id.year);
mYearSpinner.setOnLongPressUpdateInterval(100);
mYearSpinner.setOnValueChangedListener(onChangeListener);
mYearSpinnerInput = (EditText) mYearSpinner.findViewById(com.android.internal.R.id.numberpicker_input);
// show only what the user required but make sure we
// show something and the spinners have higher priority
if (!spinnersShown && !calendarViewShown) {
setSpinnersShown(true);
} else {
setSpinnersShown(spinnersShown);
setCalendarViewShown(calendarViewShown);
}
// set the min date giving priority of the minDate over startYear
mTempDate.clear();
if (!TextUtils.isEmpty(minDate)) {
if (!parseDate(minDate, mTempDate)) {
mTempDate.set(startYear, 0, 1);
}
} else {
mTempDate.set(startYear, 0, 1);
}
setMinDate(mTempDate.getTimeInMillis());
// set the max date giving priority of the maxDate over endYear
mTempDate.clear();
if (!TextUtils.isEmpty(maxDate)) {
if (!parseDate(maxDate, mTempDate)) {
mTempDate.set(endYear, 11, 31);
}
} else {
mTempDate.set(endYear, 11, 31);
}
setMaxDate(mTempDate.getTimeInMillis());
// initialize to current date
mCurrentDate.setTimeInMillis(System.currentTimeMillis());
init(mCurrentDate.get(Calendar.YEAR), mCurrentDate.get(Calendar.MONTH), mCurrentDate
.get(Calendar.DAY_OF_MONTH), null);
// re-order the number spinners to match the current date format
reorderSpinners();
// accessibility
setContentDescriptions();
// If not explicitly specified this view is important for accessibility.
if (mDelegator.getImportantForAccessibility() == View.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
mDelegator.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES);
}
}
@Override
public void init(int year, int monthOfYear, int dayOfMonth,
DatePicker.OnDateChangedListener onDateChangedListener) {
setDate(year, monthOfYear, dayOfMonth);
updateSpinners();
updateCalendarView();
mOnDateChangedListener = onDateChangedListener;
}
@Override
public void updateDate(int year, int month, int dayOfMonth) {
if (!isNewDate(year, month, dayOfMonth)) {
return;
}
setDate(year, month, dayOfMonth);
updateSpinners();
updateCalendarView();
notifyDateChanged();
}
@Override
public int getYear() {
return mCurrentDate.get(Calendar.YEAR);
}
@Override
public int getMonth() {
return mCurrentDate.get(Calendar.MONTH);
}
@Override
public int getDayOfMonth() {
return mCurrentDate.get(Calendar.DAY_OF_MONTH);
}
@Override
public void setFirstDayOfWeek(int firstDayOfWeek) {
mCalendarView.setFirstDayOfWeek(firstDayOfWeek);
}
@Override
public int getFirstDayOfWeek() {
return mCalendarView.getFirstDayOfWeek();
}
@Override
public void setMinDate(long minDate) {
mTempDate.setTimeInMillis(minDate);
if (mTempDate.get(Calendar.YEAR) == mMinDate.get(Calendar.YEAR)
&& mTempDate.get(Calendar.DAY_OF_YEAR) == mMinDate.get(Calendar.DAY_OF_YEAR)) {
// Same day, no-op.
return;
}
mMinDate.setTimeInMillis(minDate);
mCalendarView.setMinDate(minDate);
if (mCurrentDate.before(mMinDate)) {
mCurrentDate.setTimeInMillis(mMinDate.getTimeInMillis());
updateCalendarView();
}
updateSpinners();
}
@Override
public Calendar getMinDate() {
final Calendar minDate = Calendar.getInstance();
minDate.setTimeInMillis(mCalendarView.getMinDate());
return minDate;
}
@Override
public void setMaxDate(long maxDate) {
mTempDate.setTimeInMillis(maxDate);
if (mTempDate.get(Calendar.YEAR) == mMaxDate.get(Calendar.YEAR)
&& mTempDate.get(Calendar.DAY_OF_YEAR) == mMaxDate.get(Calendar.DAY_OF_YEAR)) {
// Same day, no-op.
return;
}
mMaxDate.setTimeInMillis(maxDate);
mCalendarView.setMaxDate(maxDate);
if (mCurrentDate.after(mMaxDate)) {
mCurrentDate.setTimeInMillis(mMaxDate.getTimeInMillis());
updateCalendarView();
}
updateSpinners();
}
@Override
public Calendar getMaxDate() {
final Calendar maxDate = Calendar.getInstance();
maxDate.setTimeInMillis(mCalendarView.getMaxDate());
return maxDate;
}
@Override
public void setEnabled(boolean enabled) {
mDaySpinner.setEnabled(enabled);
mMonthSpinner.setEnabled(enabled);
mYearSpinner.setEnabled(enabled);
mCalendarView.setEnabled(enabled);
mIsEnabled = enabled;
}
@Override
public boolean isEnabled() {
return mIsEnabled;
}
@Override
public CalendarView getCalendarView() {
return mCalendarView;
}
@Override
public void setCalendarViewShown(boolean shown) {
mCalendarView.setVisibility(shown ? View.VISIBLE : View.GONE);
}
@Override
public boolean getCalendarViewShown() {
return (mCalendarView.getVisibility() == View.VISIBLE);
}
@Override
public void setSpinnersShown(boolean shown) {
mSpinners.setVisibility(shown ? View.VISIBLE : View.GONE);
}
@Override
public boolean getSpinnersShown() {
return mSpinners.isShown();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
setCurrentLocale(newConfig.locale);
}
@Override
public Parcelable onSaveInstanceState(Parcelable superState) {
return new SavedState(superState, getYear(), getMonth(), getDayOfMonth(),
getMinDate().getTimeInMillis(), getMaxDate().getTimeInMillis());
}
@Override
public void onRestoreInstanceState(Parcelable state) {
if (state instanceof SavedState) {
final SavedState ss = (SavedState) state;
setDate(ss.getSelectedYear(), ss.getSelectedMonth(), ss.getSelectedDay());
updateSpinners();
updateCalendarView();
}
}
@Override
public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
onPopulateAccessibilityEvent(event);
return true;
}
@Override
public void onPopulateAccessibilityEvent(AccessibilityEvent event) {
final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_YEAR;
String selectedDateUtterance = DateUtils.formatDateTime(mContext,
mCurrentDate.getTimeInMillis(), flags);
event.getText().add(selectedDateUtterance);
}
/**
* Sets the current locale.
*
* @param locale The current locale.
*/
@Override
protected void setCurrentLocale(Locale locale) {
super.setCurrentLocale(locale);
mTempDate = getCalendarForLocale(mTempDate, locale);
mMinDate = getCalendarForLocale(mMinDate, locale);
mMaxDate = getCalendarForLocale(mMaxDate, locale);
mCurrentDate = getCalendarForLocale(mCurrentDate, locale);
mNumberOfMonths = mTempDate.getActualMaximum(Calendar.MONTH) + 1;
mShortMonths = new DateFormatSymbols().getShortMonths();
if (usingNumericMonths()) {
// We're in a locale where a date should either be all-numeric, or all-text.
// All-text would require custom NumberPicker formatters for day and year.
mShortMonths = new String[mNumberOfMonths];
for (int i = 0; i < mNumberOfMonths; ++i) {
mShortMonths[i] = String.format("%d", i + 1);
}
}
}
/**
* Tests whether the current locale is one where there are no real month names,
* such as Chinese, Japanese, or Korean locales.
*/
private boolean usingNumericMonths() {
return Character.isDigit(mShortMonths[Calendar.JANUARY].charAt(0));
}
/**
* Gets a calendar for locale bootstrapped with the value of a given calendar.
*
* @param oldCalendar The old calendar.
* @param locale The locale.
*/
private Calendar getCalendarForLocale(Calendar oldCalendar, Locale locale) {
if (oldCalendar == null) {
return Calendar.getInstance(locale);
} else {
final long currentTimeMillis = oldCalendar.getTimeInMillis();
Calendar newCalendar = Calendar.getInstance(locale);
newCalendar.setTimeInMillis(currentTimeMillis);
return newCalendar;
}
}
/**
* Reorders the spinners according to the date format that is
* explicitly set by the user and if no such is set fall back
* to the current locale's default format.
*/
private void reorderSpinners() {
mSpinners.removeAllViews();
// We use numeric spinners for year and day, but textual months. Ask icu4c what
// order the user's locale uses for that combination. http://b/7207103.
String pattern = DateFormat.getBestDateTimePattern(Locale.getDefault(), "yyyyMMMdd");
char[] order = ICU.getDateFormatOrder(pattern);
final int spinnerCount = order.length;
for (int i = 0; i < spinnerCount; i++) {
switch (order[i]) {
case 'd':
mSpinners.addView(mDaySpinner);
setImeOptions(mDaySpinner, spinnerCount, i);
break;
case 'M':
mSpinners.addView(mMonthSpinner);
setImeOptions(mMonthSpinner, spinnerCount, i);
break;
case 'y':
mSpinners.addView(mYearSpinner);
setImeOptions(mYearSpinner, spinnerCount, i);
break;
default:
throw new IllegalArgumentException(Arrays.toString(order));
}
}
}
/**
* Parses the given <code>date</code> and in case of success sets the result
* to the <code>outDate</code>.
*
* @return True if the date was parsed.
*/
private boolean parseDate(String date, Calendar outDate) {
try {
outDate.setTime(mDateFormat.parse(date));
return true;
} catch (ParseException e) {
e.printStackTrace();
return false;
}
}
private boolean isNewDate(int year, int month, int dayOfMonth) {
return (mCurrentDate.get(Calendar.YEAR) != year
|| mCurrentDate.get(Calendar.MONTH) != month
|| mCurrentDate.get(Calendar.DAY_OF_MONTH) != dayOfMonth);
}
private void setDate(int year, int month, int dayOfMonth) {
mCurrentDate.set(year, month, dayOfMonth);
if (mCurrentDate.before(mMinDate)) {
mCurrentDate.setTimeInMillis(mMinDate.getTimeInMillis());
} else if (mCurrentDate.after(mMaxDate)) {
mCurrentDate.setTimeInMillis(mMaxDate.getTimeInMillis());
}
}
private void updateSpinners() {
// set the spinner ranges respecting the min and max dates
if (mCurrentDate.equals(mMinDate)) {
mDaySpinner.setMinValue(mCurrentDate.get(Calendar.DAY_OF_MONTH));
mDaySpinner.setMaxValue(mCurrentDate.getActualMaximum(Calendar.DAY_OF_MONTH));
mDaySpinner.setWrapSelectorWheel(false);
mMonthSpinner.setDisplayedValues(null);
mMonthSpinner.setMinValue(mCurrentDate.get(Calendar.MONTH));
mMonthSpinner.setMaxValue(mCurrentDate.getActualMaximum(Calendar.MONTH));
mMonthSpinner.setWrapSelectorWheel(false);
} else if (mCurrentDate.equals(mMaxDate)) {
mDaySpinner.setMinValue(mCurrentDate.getActualMinimum(Calendar.DAY_OF_MONTH));
mDaySpinner.setMaxValue(mCurrentDate.get(Calendar.DAY_OF_MONTH));
mDaySpinner.setWrapSelectorWheel(false);
mMonthSpinner.setDisplayedValues(null);
mMonthSpinner.setMinValue(mCurrentDate.getActualMinimum(Calendar.MONTH));
mMonthSpinner.setMaxValue(mCurrentDate.get(Calendar.MONTH));
mMonthSpinner.setWrapSelectorWheel(false);
} else {
mDaySpinner.setMinValue(1);
mDaySpinner.setMaxValue(mCurrentDate.getActualMaximum(Calendar.DAY_OF_MONTH));
mDaySpinner.setWrapSelectorWheel(true);
mMonthSpinner.setDisplayedValues(null);
mMonthSpinner.setMinValue(0);
mMonthSpinner.setMaxValue(11);
mMonthSpinner.setWrapSelectorWheel(true);
}
// make sure the month names are a zero based array
// with the months in the month spinner
String[] displayedValues = Arrays.copyOfRange(mShortMonths,
mMonthSpinner.getMinValue(), mMonthSpinner.getMaxValue() + 1);
mMonthSpinner.setDisplayedValues(displayedValues);
// year spinner range does not change based on the current date
mYearSpinner.setMinValue(mMinDate.get(Calendar.YEAR));
mYearSpinner.setMaxValue(mMaxDate.get(Calendar.YEAR));
mYearSpinner.setWrapSelectorWheel(false);
// set the spinner values
mYearSpinner.setValue(mCurrentDate.get(Calendar.YEAR));
mMonthSpinner.setValue(mCurrentDate.get(Calendar.MONTH));
mDaySpinner.setValue(mCurrentDate.get(Calendar.DAY_OF_MONTH));
if (usingNumericMonths()) {
mMonthSpinnerInput.setRawInputType(InputType.TYPE_CLASS_NUMBER);
}
}
/**
* Updates the calendar view with the current date.
*/
private void updateCalendarView() {
mCalendarView.setDate(mCurrentDate.getTimeInMillis(), false, false);
}
/**
* Notifies the listener, if such, for a change in the selected date.
*/
private void notifyDateChanged() {
mDelegator.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SELECTED);
if (mOnDateChangedListener != null) {
mOnDateChangedListener.onDateChanged(mDelegator, getYear(), getMonth(),
getDayOfMonth());
}
}
/**
* Sets the IME options for a spinner based on its ordering.
*
* @param spinner The spinner.
* @param spinnerCount The total spinner count.
* @param spinnerIndex The index of the given spinner.
*/
private void setImeOptions(NumberPicker spinner, int spinnerCount, int spinnerIndex) {
final int imeOptions;
if (spinnerIndex < spinnerCount - 1) {
imeOptions = EditorInfo.IME_ACTION_NEXT;
} else {
imeOptions = EditorInfo.IME_ACTION_DONE;
}
TextView input = (TextView) spinner.findViewById(com.android.internal.R.id.numberpicker_input);
input.setImeOptions(imeOptions);
}
private void setContentDescriptions() {
// Day
trySetContentDescription(mDaySpinner, com.android.internal.R.id.increment,
com.android.internal.R.string.date_picker_increment_day_button);
trySetContentDescription(mDaySpinner, com.android.internal.R.id.decrement,
com.android.internal.R.string.date_picker_decrement_day_button);
// Month
trySetContentDescription(mMonthSpinner, com.android.internal.R.id.increment,
com.android.internal.R.string.date_picker_increment_month_button);
trySetContentDescription(mMonthSpinner, com.android.internal.R.id.decrement,
com.android.internal.R.string.date_picker_decrement_month_button);
// Year
trySetContentDescription(mYearSpinner, com.android.internal.R.id.increment,
com.android.internal.R.string.date_picker_increment_year_button);
trySetContentDescription(mYearSpinner, com.android.internal.R.id.decrement,
com.android.internal.R.string.date_picker_decrement_year_button);
}
private void trySetContentDescription(View root, int viewId, int contDescResId) {
View target = root.findViewById(viewId);
if (target != null) {
target.setContentDescription(mContext.getString(contDescResId));
}
}
private void updateInputState() {
// Make sure that if the user changes the value and the IME is active
// for one of the inputs if this widget, the IME is closed. If the user
// changed the value via the IME and there is a next input the IME will
// be shown, otherwise the user chose another means of changing the
// value and having the IME up makes no sense.
InputMethodManager inputMethodManager = InputMethodManager.peekInstance();
if (inputMethodManager != null) {
if (inputMethodManager.isActive(mYearSpinnerInput)) {
mYearSpinnerInput.clearFocus();
inputMethodManager.hideSoftInputFromWindow(mDelegator.getWindowToken(), 0);
} else if (inputMethodManager.isActive(mMonthSpinnerInput)) {
mMonthSpinnerInput.clearFocus();
inputMethodManager.hideSoftInputFromWindow(mDelegator.getWindowToken(), 0);
} else if (inputMethodManager.isActive(mDaySpinnerInput)) {
mDaySpinnerInput.clearFocus();
inputMethodManager.hideSoftInputFromWindow(mDelegator.getWindowToken(), 0);
}
}
}
}