Transfer date/time value to chooser as double

content/public/android/java/src/org/chromium/content/browser/input/WeekPicker.java

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.content.browser.input;
 
 import android.content.Context;
 
 import org.chromium.content.R;
 
 import java.util.Calendar;
+import java.util.TimeZone;
 
 // This class is heavily based on android.widget.DatePicker.
 public class WeekPicker extends TwoFieldDatePicker {
 
-    public WeekPicker(Context context, long minValue, long maxValue) {
+    public WeekPicker(Context context, double minValue, double maxValue) {
         super(context, minValue, maxValue);
 
         getPositionInYearSpinner().setContentDescription(
                 getResources().getString(R.string.accessibility_date_picker_week));
 
         // initialize to current date
-        Calendar cal = Calendar.getInstance();
+        Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
         cal.setFirstDayOfWeek(Calendar.MONDAY);
         cal.setMinimalDaysInFirstWeek(4);
         cal.setTimeInMillis(System.currentTimeMillis());
         init(getISOWeekYearForDate(cal), getWeekForDate(cal), null);
     }
 
-    private Calendar createDateFromWeek(int year, int week) {
-        Calendar date = Calendar.getInstance();
+    /**
+     * Creates a date object from the |year| and |week|.
+     */
+    public static Calendar createDateFromWeek(int year, int week) {
+        Calendar date = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
         date.clear();
         date.setFirstDayOfWeek(Calendar.MONDAY);
         date.setMinimalDaysInFirstWeek(4);
         date.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
         date.set(Calendar.YEAR, year);
         date.set(Calendar.WEEK_OF_YEAR, week);
         return date;
     }
 
+    /**
+     * Creates a date object from the |value| which is milliseconds since epoch.
+     */
+    public static Calendar createDateFromValue(double value) {
+        Calendar date = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
+        date.clear();
+        date.setFirstDayOfWeek(Calendar.MONDAY);
+        date.setMinimalDaysInFirstWeek(4);
+        date.setTimeInMillis((long) value);
+        return date;
+    }
+
     @Override
-    protected Calendar createDateFromValue(long value) {
-        Calendar date = Calendar.getInstance();
-        date.clear();
-        date.setFirstDayOfWeek(Calendar.MONDAY);
-        date.setMinimalDaysInFirstWeek(4);
-        date.setTimeInMillis(value);
-        return date;
+    protected Calendar getDateForValue(double value) {
+        return WeekPicker.createDateFromValue(value);
     }
 
     public static int getISOWeekYearForDate(Calendar date) {
         int year = date.get(Calendar.YEAR);
         int month = date.get(Calendar.MONTH);
         int week = date.get(Calendar.WEEK_OF_YEAR);
         if (month == 0 && week > 51) {
             year--;
         } else if (month == 11 && week == 1) {
             year++;
@@ skipping 62 matching lines @@
     }
 
     @Override
     protected int getMinPositionInYear(int year) {
         if (year == getISOWeekYearForDate(getMinDate())) {
             return getWeekForDate(getMinDate());
         }
         return 1;
     }
 }