1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package androidx.leanback.widget.picker; 18 19 import android.content.res.Resources; 20 import android.os.Build; 21 22 import java.text.DateFormatSymbols; 23 import java.util.Calendar; 24 import java.util.Locale; 25 26 /** 27 * Utility class that provides Date/Time related constants as well as locale-specific calendar for 28 * both {@link DatePicker} and {@link TimePicker}. 29 */ 30 class PickerUtility { 31 32 // Whether the API version supports the use of {@link DateFormat#getBestDateTimePattern()} 33 static final boolean SUPPORTS_BEST_DATE_TIME_PATTERN = 34 Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2; 35 public static class DateConstant { 36 public final Locale locale; 37 public final String[] months; 38 public final String[] days; 39 DateConstant(Locale locale, Resources resources)40 private DateConstant(Locale locale, Resources resources) { 41 this.locale = locale; 42 DateFormatSymbols symbols = DateFormatSymbols.getInstance(locale); 43 months = symbols.getShortMonths(); 44 Calendar calendar = Calendar.getInstance(locale); 45 days = createStringIntArrays(calendar.getMinimum(Calendar.DAY_OF_MONTH), 46 calendar.getMaximum(Calendar.DAY_OF_MONTH), "%02d"); 47 } 48 } 49 50 public static class TimeConstant { 51 public final Locale locale; 52 public final String[] hours12; 53 public final String[] hours24; 54 public final String[] minutes; 55 public final String[] ampm; 56 TimeConstant(Locale locale, Resources resources)57 private TimeConstant(Locale locale, Resources resources) { 58 this.locale = locale; 59 DateFormatSymbols symbols = DateFormatSymbols.getInstance(locale); 60 hours12 = createStringIntArrays(1, 12, "%02d"); 61 hours24 = createStringIntArrays(0, 23, "%02d"); 62 minutes = createStringIntArrays(0, 59, "%02d"); 63 ampm = symbols.getAmPmStrings(); 64 } 65 } 66 getDateConstantInstance(Locale locale, Resources resources)67 public static DateConstant getDateConstantInstance(Locale locale, Resources resources) { 68 return new DateConstant(locale, resources); 69 } 70 getTimeConstantInstance(Locale locale, Resources resources)71 public static TimeConstant getTimeConstantInstance(Locale locale, Resources resources) { 72 return new TimeConstant(locale, resources); 73 } 74 75 createStringIntArrays(int firstNumber, int lastNumber, String format)76 public static String[] createStringIntArrays(int firstNumber, int lastNumber, String format) { 77 String[] array = new String[lastNumber - firstNumber + 1]; 78 for (int i = firstNumber; i <= lastNumber; i++) { 79 if (format != null) { 80 array[i - firstNumber] = String.format(format, i); 81 } else { 82 array[i - firstNumber] = String.valueOf(i); 83 } 84 } 85 return array; 86 } 87 getCalendarForLocale(Calendar oldCalendar, Locale locale)88 public static Calendar getCalendarForLocale(Calendar oldCalendar, Locale locale) { 89 if (oldCalendar == null) { 90 return Calendar.getInstance(locale); 91 } else { 92 final long currentTimeMillis = oldCalendar.getTimeInMillis(); 93 Calendar newCalendar = Calendar.getInstance(locale); 94 newCalendar.setTimeInMillis(currentTimeMillis); 95 return newCalendar; 96 } 97 } 98 PickerUtility()99 private PickerUtility() { 100 } 101 } 102