DateUtils.java revision 076357b8567458d4b6dfdcf839ef751634cd2bfb
1/* 2 * Copyright (C) 2006 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 17package android.text.format; 18 19import com.android.internal.R; 20 21import android.content.Context; 22import android.content.res.Configuration; 23import android.content.res.Resources; 24import android.pim.DateException; 25 26import java.util.Calendar; 27import java.util.Date; 28import java.util.GregorianCalendar; 29import java.util.TimeZone; 30 31/** 32 * This class contains various date-related utilities for creating text for things like 33 * elapsed time and date ranges, strings for days of the week and months, and AM/PM text etc. 34 */ 35public class DateUtils 36{ 37 private static final Object sLock = new Object(); 38 private static final int[] sDaysLong = new int[] { 39 com.android.internal.R.string.day_of_week_long_sunday, 40 com.android.internal.R.string.day_of_week_long_monday, 41 com.android.internal.R.string.day_of_week_long_tuesday, 42 com.android.internal.R.string.day_of_week_long_wednesday, 43 com.android.internal.R.string.day_of_week_long_thursday, 44 com.android.internal.R.string.day_of_week_long_friday, 45 com.android.internal.R.string.day_of_week_long_saturday, 46 }; 47 private static final int[] sDaysMedium = new int[] { 48 com.android.internal.R.string.day_of_week_medium_sunday, 49 com.android.internal.R.string.day_of_week_medium_monday, 50 com.android.internal.R.string.day_of_week_medium_tuesday, 51 com.android.internal.R.string.day_of_week_medium_wednesday, 52 com.android.internal.R.string.day_of_week_medium_thursday, 53 com.android.internal.R.string.day_of_week_medium_friday, 54 com.android.internal.R.string.day_of_week_medium_saturday, 55 }; 56 private static final int[] sDaysShort = new int[] { 57 com.android.internal.R.string.day_of_week_short_sunday, 58 com.android.internal.R.string.day_of_week_short_monday, 59 com.android.internal.R.string.day_of_week_short_tuesday, 60 com.android.internal.R.string.day_of_week_short_wednesday, 61 com.android.internal.R.string.day_of_week_short_thursday, 62 com.android.internal.R.string.day_of_week_short_friday, 63 com.android.internal.R.string.day_of_week_short_saturday, 64 }; 65 private static final int[] sDaysShorter = new int[] { 66 com.android.internal.R.string.day_of_week_shorter_sunday, 67 com.android.internal.R.string.day_of_week_shorter_monday, 68 com.android.internal.R.string.day_of_week_shorter_tuesday, 69 com.android.internal.R.string.day_of_week_shorter_wednesday, 70 com.android.internal.R.string.day_of_week_shorter_thursday, 71 com.android.internal.R.string.day_of_week_shorter_friday, 72 com.android.internal.R.string.day_of_week_shorter_saturday, 73 }; 74 private static final int[] sDaysShortest = new int[] { 75 com.android.internal.R.string.day_of_week_shortest_sunday, 76 com.android.internal.R.string.day_of_week_shortest_monday, 77 com.android.internal.R.string.day_of_week_shortest_tuesday, 78 com.android.internal.R.string.day_of_week_shortest_wednesday, 79 com.android.internal.R.string.day_of_week_shortest_thursday, 80 com.android.internal.R.string.day_of_week_shortest_friday, 81 com.android.internal.R.string.day_of_week_shortest_saturday, 82 }; 83 private static final int[] sMonthsLong = new int [] { 84 com.android.internal.R.string.month_long_january, 85 com.android.internal.R.string.month_long_february, 86 com.android.internal.R.string.month_long_march, 87 com.android.internal.R.string.month_long_april, 88 com.android.internal.R.string.month_long_may, 89 com.android.internal.R.string.month_long_june, 90 com.android.internal.R.string.month_long_july, 91 com.android.internal.R.string.month_long_august, 92 com.android.internal.R.string.month_long_september, 93 com.android.internal.R.string.month_long_october, 94 com.android.internal.R.string.month_long_november, 95 com.android.internal.R.string.month_long_december, 96 }; 97 private static final int[] sMonthsMedium = new int [] { 98 com.android.internal.R.string.month_medium_january, 99 com.android.internal.R.string.month_medium_february, 100 com.android.internal.R.string.month_medium_march, 101 com.android.internal.R.string.month_medium_april, 102 com.android.internal.R.string.month_medium_may, 103 com.android.internal.R.string.month_medium_june, 104 com.android.internal.R.string.month_medium_july, 105 com.android.internal.R.string.month_medium_august, 106 com.android.internal.R.string.month_medium_september, 107 com.android.internal.R.string.month_medium_october, 108 com.android.internal.R.string.month_medium_november, 109 com.android.internal.R.string.month_medium_december, 110 }; 111 private static final int[] sMonthsShortest = new int [] { 112 com.android.internal.R.string.month_shortest_january, 113 com.android.internal.R.string.month_shortest_february, 114 com.android.internal.R.string.month_shortest_march, 115 com.android.internal.R.string.month_shortest_april, 116 com.android.internal.R.string.month_shortest_may, 117 com.android.internal.R.string.month_shortest_june, 118 com.android.internal.R.string.month_shortest_july, 119 com.android.internal.R.string.month_shortest_august, 120 com.android.internal.R.string.month_shortest_september, 121 com.android.internal.R.string.month_shortest_october, 122 com.android.internal.R.string.month_shortest_november, 123 com.android.internal.R.string.month_shortest_december, 124 }; 125 private static final int[] sAmPm = new int[] { 126 com.android.internal.R.string.am, 127 com.android.internal.R.string.pm, 128 }; 129 private static Configuration sLastConfig; 130 private static String sStatusTimeFormat; 131 private static String sElapsedFormatMMSS; 132 private static String sElapsedFormatHMMSS; 133 134 private static final String FAST_FORMAT_HMMSS = "%1$d:%2$02d:%3$02d"; 135 private static final String FAST_FORMAT_MMSS = "%1$02d:%2$02d"; 136 private static final char TIME_PADDING = '0'; 137 private static final char TIME_SEPARATOR = ':'; 138 139 140 public static final long SECOND_IN_MILLIS = 1000; 141 public static final long MINUTE_IN_MILLIS = SECOND_IN_MILLIS * 60; 142 public static final long HOUR_IN_MILLIS = MINUTE_IN_MILLIS * 60; 143 public static final long DAY_IN_MILLIS = HOUR_IN_MILLIS * 24; 144 public static final long WEEK_IN_MILLIS = DAY_IN_MILLIS * 7; 145 public static final long YEAR_IN_MILLIS = WEEK_IN_MILLIS * 52; 146 147 // The following FORMAT_* symbols are used for specifying the format of 148 // dates and times in the formatDateRange method. 149 public static final int FORMAT_SHOW_TIME = 0x00001; 150 public static final int FORMAT_SHOW_WEEKDAY = 0x00002; 151 public static final int FORMAT_SHOW_YEAR = 0x00004; 152 public static final int FORMAT_NO_YEAR = 0x00008; 153 public static final int FORMAT_SHOW_DATE = 0x00010; 154 public static final int FORMAT_NO_MONTH_DAY = 0x00020; 155 public static final int FORMAT_12HOUR = 0x00040; 156 public static final int FORMAT_24HOUR = 0x00080; 157 public static final int FORMAT_CAP_AMPM = 0x00100; 158 public static final int FORMAT_NO_NOON = 0x00200; 159 public static final int FORMAT_CAP_NOON = 0x00400; 160 public static final int FORMAT_NO_MIDNIGHT = 0x00800; 161 public static final int FORMAT_CAP_MIDNIGHT = 0x01000; 162 public static final int FORMAT_UTC = 0x02000; 163 public static final int FORMAT_ABBREV_TIME = 0x04000; 164 public static final int FORMAT_ABBREV_WEEKDAY = 0x08000; 165 public static final int FORMAT_ABBREV_MONTH = 0x10000; 166 public static final int FORMAT_NUMERIC_DATE = 0x20000; 167 public static final int FORMAT_ABBREV_RELATIVE = 0x40000; 168 public static final int FORMAT_ABBREV_ALL = 0x80000; 169 public static final int FORMAT_CAP_NOON_MIDNIGHT = (FORMAT_CAP_NOON | FORMAT_CAP_MIDNIGHT); 170 public static final int FORMAT_NO_NOON_MIDNIGHT = (FORMAT_NO_NOON | FORMAT_NO_MIDNIGHT); 171 172 // Date and time format strings that are constant and don't need to be 173 // translated. 174 public static final String HOUR_MINUTE_24 = "%H:%M"; 175 public static final String MONTH_FORMAT = "%B"; 176 public static final String ABBREV_MONTH_FORMAT = "%b"; 177 public static final String NUMERIC_MONTH_FORMAT = "%m"; 178 public static final String MONTH_DAY_FORMAT = "%-d"; 179 public static final String YEAR_FORMAT = "%Y"; 180 public static final String YEAR_FORMAT_TWO_DIGITS = "%g"; 181 public static final String WEEKDAY_FORMAT = "%A"; 182 public static final String ABBREV_WEEKDAY_FORMAT = "%a"; 183 184 // This table is used to lookup the resource string id of a format string 185 // used for formatting a start and end date that fall in the same year. 186 // The index is constructed from a bit-wise OR of the boolean values: 187 // {showTime, showYear, showWeekDay}. For example, if showYear and 188 // showWeekDay are both true, then the index would be 3. 189 public static final int sameYearTable[] = { 190 com.android.internal.R.string.same_year_md1_md2, 191 com.android.internal.R.string.same_year_wday1_md1_wday2_md2, 192 com.android.internal.R.string.same_year_mdy1_mdy2, 193 com.android.internal.R.string.same_year_wday1_mdy1_wday2_mdy2, 194 com.android.internal.R.string.same_year_md1_time1_md2_time2, 195 com.android.internal.R.string.same_year_wday1_md1_time1_wday2_md2_time2, 196 com.android.internal.R.string.same_year_mdy1_time1_mdy2_time2, 197 com.android.internal.R.string.same_year_wday1_mdy1_time1_wday2_mdy2_time2, 198 199 // Numeric date strings 200 com.android.internal.R.string.numeric_md1_md2, 201 com.android.internal.R.string.numeric_wday1_md1_wday2_md2, 202 com.android.internal.R.string.numeric_mdy1_mdy2, 203 com.android.internal.R.string.numeric_wday1_mdy1_wday2_mdy2, 204 com.android.internal.R.string.numeric_md1_time1_md2_time2, 205 com.android.internal.R.string.numeric_wday1_md1_time1_wday2_md2_time2, 206 com.android.internal.R.string.numeric_mdy1_time1_mdy2_time2, 207 com.android.internal.R.string.numeric_wday1_mdy1_time1_wday2_mdy2_time2, 208 }; 209 210 // This table is used to lookup the resource string id of a format string 211 // used for formatting a start and end date that fall in the same month. 212 // The index is constructed from a bit-wise OR of the boolean values: 213 // {showTime, showYear, showWeekDay}. For example, if showYear and 214 // showWeekDay are both true, then the index would be 3. 215 public static final int sameMonthTable[] = { 216 com.android.internal.R.string.same_month_md1_md2, 217 com.android.internal.R.string.same_month_wday1_md1_wday2_md2, 218 com.android.internal.R.string.same_month_mdy1_mdy2, 219 com.android.internal.R.string.same_month_wday1_mdy1_wday2_mdy2, 220 com.android.internal.R.string.same_month_md1_time1_md2_time2, 221 com.android.internal.R.string.same_month_wday1_md1_time1_wday2_md2_time2, 222 com.android.internal.R.string.same_month_mdy1_time1_mdy2_time2, 223 com.android.internal.R.string.same_month_wday1_mdy1_time1_wday2_mdy2_time2, 224 225 com.android.internal.R.string.numeric_md1_md2, 226 com.android.internal.R.string.numeric_wday1_md1_wday2_md2, 227 com.android.internal.R.string.numeric_mdy1_mdy2, 228 com.android.internal.R.string.numeric_wday1_mdy1_wday2_mdy2, 229 com.android.internal.R.string.numeric_md1_time1_md2_time2, 230 com.android.internal.R.string.numeric_wday1_md1_time1_wday2_md2_time2, 231 com.android.internal.R.string.numeric_mdy1_time1_mdy2_time2, 232 com.android.internal.R.string.numeric_wday1_mdy1_time1_wday2_mdy2_time2, 233 }; 234 235 /** 236 * Request the full spelled-out name. For use with the 'abbrev' parameter of 237 * {@link #getDayOfWeekString} and {@link #getMonthString}. 238 * 239 * @more <p> 240 * e.g. "Sunday" or "January" 241 */ 242 public static final int LENGTH_LONG = 10; 243 244 /** 245 * Request an abbreviated version of the name. For use with the 'abbrev' 246 * parameter of {@link #getDayOfWeekString} and {@link #getMonthString}. 247 * 248 * @more <p> 249 * e.g. "Sun" or "Jan" 250 */ 251 public static final int LENGTH_MEDIUM = 20; 252 253 /** 254 * Request a shorter abbreviated version of the name. 255 * For use with the 'abbrev' parameter of {@link #getDayOfWeekString} and {@link #getMonthString}. 256 * @more 257 * <p>e.g. "Su" or "Jan" 258 * <p>In some languages, the results returned for LENGTH_SHORT may be the same as 259 * return for {@link #LENGTH_MEDIUM}. 260 */ 261 public static final int LENGTH_SHORT = 30; 262 263 /** 264 * Request an even shorter abbreviated version of the name. 265 * For use with the 'abbrev' parameter of {@link #getDayOfWeekString} and {@link #getMonthString}. 266 * @more 267 * <p>e.g. "M", "Tu", "Th" or "J" 268 * <p>In some languages, the results returned for LENGTH_SHORTEST may be the same as 269 * return for {@link #LENGTH_SHORTER}. 270 */ 271 public static final int LENGTH_SHORTER = 40; 272 273 /** 274 * Request an even shorter abbreviated version of the name. 275 * For use with the 'abbrev' parameter of {@link #getDayOfWeekString} and {@link #getMonthString}. 276 * @more 277 * <p>e.g. "S", "T", "T" or "J" 278 * <p>In some languages, the results returned for LENGTH_SHORTEST may be the same as 279 * return for {@link #LENGTH_SHORTER}. 280 */ 281 public static final int LENGTH_SHORTEST = 50; 282 283 /** 284 * Return a string for the day of the week. 285 * @param dayOfWeek One of {@link Calendar#SUNDAY Calendar.SUNDAY}, 286 * {@link Calendar#MONDAY Calendar.MONDAY}, etc. 287 * @param abbrev One of {@link #LENGTH_LONG}, {@link #LENGTH_SHORT}, {@link #LENGTH_SHORTER} 288 * or {@link #LENGTH_SHORTEST}. For forward compatibility, anything else 289 * will return the same as {#LENGTH_MEDIUM}. 290 * @throws IndexOutOfBoundsException if the dayOfWeek is out of bounds. 291 */ 292 public static String getDayOfWeekString(int dayOfWeek, int abbrev) { 293 int[] list; 294 switch (abbrev) { 295 case LENGTH_LONG: list = sDaysLong; break; 296 case LENGTH_MEDIUM: list = sDaysMedium; break; 297 case LENGTH_SHORT: list = sDaysShort; break; 298 case LENGTH_SHORTER: list = sDaysShorter; break; 299 case LENGTH_SHORTEST: list = sDaysShortest; break; 300 default: list = sDaysMedium; break; 301 } 302 303 Resources r = Resources.getSystem(); 304 return r.getString(list[dayOfWeek - Calendar.SUNDAY]); 305 } 306 307 /** 308 * Return a localized string for AM or PM. 309 * @param ampm Either {@link Calendar#AM Calendar.AM} or {@link Calendar#PM Calendar.PM}. 310 * @throws IndexOutOfBoundsException if the ampm is out of bounds. 311 * @return Localized version of "AM" or "PM". 312 */ 313 public static String getAMPMString(int ampm) { 314 Resources r = Resources.getSystem(); 315 return r.getString(sAmPm[ampm - Calendar.AM]); 316 } 317 318 /** 319 * Return a localized string for the day of the week. 320 * @param month One of {@link Calendar#JANUARY Calendar.JANUARY}, 321 * {@link Calendar#FEBRUARY Calendar.FEBRUARY}, etc. 322 * @param abbrev One of {@link #LENGTH_LONG}, {@link #LENGTH_SHORT}, {@link #LENGTH_SHORTER} 323 * or {@link #LENGTH_SHORTEST}. For forward compatibility, anything else 324 * will return the same as {#LENGTH_MEDIUM}. 325 * @return Localized day of the week. 326 */ 327 public static String getMonthString(int month, int abbrev) { 328 // Note that here we use sMonthsMedium for MEDIUM, SHORT and SHORTER. 329 // This is a shortcut to not spam the translators with too many variations 330 // of the same string. If we find that in a language the distinction 331 // is necessary, we can can add more without changing this API. 332 int[] list; 333 switch (abbrev) { 334 case LENGTH_LONG: list = sMonthsLong; break; 335 case LENGTH_MEDIUM: list = sMonthsMedium; break; 336 case LENGTH_SHORT: list = sMonthsMedium; break; 337 case LENGTH_SHORTER: list = sMonthsMedium; break; 338 case LENGTH_SHORTEST: list = sMonthsShortest; break; 339 default: list = sMonthsMedium; break; 340 } 341 342 Resources r = Resources.getSystem(); 343 return r.getString(list[month - Calendar.JANUARY]); 344 } 345 346 /** 347 * Returns a string describing the elapsed time since startTime. 348 * @param startTime some time in the past. 349 * @return a String object containing the elapsed time. 350 * @see #getRelativeTimeSpanString(long, long, long) 351 */ 352 public static CharSequence getRelativeTimeSpanString(long startTime) { 353 return getRelativeTimeSpanString(startTime, System.currentTimeMillis(), MINUTE_IN_MILLIS); 354 } 355 356 /** 357 * Returns a string describing 'time' as a time relative to 'now'. 358 * <p> 359 * Time spans in the past are formatted like "42 minutes ago". 360 * Time spans in the future are formatted like "in 42 minutes". 361 * 362 * @param time the time to describe, in milliseconds 363 * @param now the current time in milliseconds 364 * @param minResolution the minimum timespan to report. For example, a time 3 seconds in the 365 * past will be reported as "0 minutes ago" if this is set to MINUTE_IN_MILLIS. Pass one of 366 * 0, MINUTE_IN_MILLIS, HOUR_IN_MILLIS, DAY_IN_MILLIS, WEEK_IN_MILLIS 367 */ 368 public static CharSequence getRelativeTimeSpanString(long time, long now, long minResolution) { 369 int flags = FORMAT_SHOW_DATE | FORMAT_SHOW_YEAR | FORMAT_ABBREV_MONTH; 370 return getRelativeTimeSpanString(time, now, minResolution, flags); 371 } 372 373 /** 374 * Returns a string describing 'time' as a time relative to 'now'. 375 * <p> 376 * Time spans in the past are formatted like "42 minutes ago". Time spans in 377 * the future are formatted like "in 42 minutes". 378 * <p> 379 * Can use {@link #FORMAT_ABBREV_RELATIVE} flag to use abbreviated relative 380 * times, like "42 mins ago". 381 * 382 * @param time the time to describe, in milliseconds 383 * @param now the current time in milliseconds 384 * @param minResolution the minimum timespan to report. For example, a time 385 * 3 seconds in the past will be reported as "0 minutes ago" if 386 * this is set to MINUTE_IN_MILLIS. Pass one of 0, 387 * MINUTE_IN_MILLIS, HOUR_IN_MILLIS, DAY_IN_MILLIS, 388 * WEEK_IN_MILLIS 389 * @param flags a bit mask of formatting options, such as 390 * {@link #FORMAT_NUMERIC_DATE} or 391 * {@link #FORMAT_ABBREV_RELATIVE} 392 */ 393 public static CharSequence getRelativeTimeSpanString(long time, long now, long minResolution, 394 int flags) { 395 Resources r = Resources.getSystem(); 396 boolean abbrevRelative = (flags & (FORMAT_ABBREV_RELATIVE | FORMAT_ABBREV_ALL)) != 0; 397 398 boolean past = (now >= time); 399 long duration = Math.abs(now - time); 400 401 int resId; 402 long count; 403 if (duration < MINUTE_IN_MILLIS && minResolution < MINUTE_IN_MILLIS) { 404 count = duration / SECOND_IN_MILLIS; 405 if (past) { 406 if (abbrevRelative) { 407 resId = com.android.internal.R.plurals.abbrev_num_seconds_ago; 408 } else { 409 resId = com.android.internal.R.plurals.num_seconds_ago; 410 } 411 } else { 412 if (abbrevRelative) { 413 resId = com.android.internal.R.plurals.abbrev_in_num_seconds; 414 } else { 415 resId = com.android.internal.R.plurals.in_num_seconds; 416 } 417 } 418 } else if (duration < HOUR_IN_MILLIS && minResolution < HOUR_IN_MILLIS) { 419 count = duration / MINUTE_IN_MILLIS; 420 if (past) { 421 if (abbrevRelative) { 422 resId = com.android.internal.R.plurals.abbrev_num_minutes_ago; 423 } else { 424 resId = com.android.internal.R.plurals.num_minutes_ago; 425 } 426 } else { 427 if (abbrevRelative) { 428 resId = com.android.internal.R.plurals.abbrev_in_num_minutes; 429 } else { 430 resId = com.android.internal.R.plurals.in_num_minutes; 431 } 432 } 433 } else if (duration < DAY_IN_MILLIS && minResolution < DAY_IN_MILLIS) { 434 count = duration / HOUR_IN_MILLIS; 435 if (past) { 436 if (abbrevRelative) { 437 resId = com.android.internal.R.plurals.abbrev_num_hours_ago; 438 } else { 439 resId = com.android.internal.R.plurals.num_hours_ago; 440 } 441 } else { 442 if (abbrevRelative) { 443 resId = com.android.internal.R.plurals.abbrev_in_num_hours; 444 } else { 445 resId = com.android.internal.R.plurals.in_num_hours; 446 } 447 } 448 } else if (duration < WEEK_IN_MILLIS && minResolution < WEEK_IN_MILLIS) { 449 count = duration / DAY_IN_MILLIS; 450 if (past) { 451 if (abbrevRelative) { 452 resId = com.android.internal.R.plurals.abbrev_num_days_ago; 453 } else { 454 resId = com.android.internal.R.plurals.num_days_ago; 455 } 456 } else { 457 if (abbrevRelative) { 458 resId = com.android.internal.R.plurals.abbrev_in_num_days; 459 } else { 460 resId = com.android.internal.R.plurals.in_num_days; 461 } 462 } 463 } else { 464 // We know that we won't be showing the time, so it is safe to pass 465 // in a null context. 466 return formatDateRange(null, time, time, flags); 467 } 468 469 String format = r.getQuantityString(resId, (int) count); 470 return String.format(format, count); 471 } 472 473 /** 474 * Return string describing the elapsed time since startTime formatted like 475 * "[relative time/date], [time]". 476 * <p> 477 * Example output strings for the US date format. 478 * <ul> 479 * <li>3 mins ago, 10:15 AM</li> 480 * <li>yesterday, 12:20 PM</li> 481 * <li>Dec 12, 4:12 AM</li> 482 * <li>11/14/2007, 8:20 AM</li> 483 * </ul> 484 * 485 * @param time some time in the past. 486 * @param minResolution the minimum elapsed time (in milliseconds) to report 487 * when showing relative times. For example, a time 3 seconds in 488 * the past will be reported as "0 minutes ago" if this is set to 489 * {@link #MINUTE_IN_MILLIS}. 490 * @param transitionResolution the elapsed time (in milliseconds) at which 491 * to stop reporting relative measurements. Elapsed times greater 492 * than this resolution will default to normal date formatting. 493 * For example, will transition from "6 days ago" to "Dec 12" 494 * when using {@link #WEEK_IN_MILLIS}. 495 */ 496 public static CharSequence getRelativeDateTimeString(Context c, long time, long minResolution, 497 long transitionResolution, int flags) { 498 Resources r = Resources.getSystem(); 499 500 long now = System.currentTimeMillis(); 501 long duration = Math.abs(now - time); 502 503 // getRelativeTimeSpanString() doesn't correctly format relative dates 504 // above a week or exact dates below a day, so clamp 505 // transitionResolution as needed. 506 if (transitionResolution > WEEK_IN_MILLIS) { 507 transitionResolution = WEEK_IN_MILLIS; 508 } else if (transitionResolution < DAY_IN_MILLIS) { 509 transitionResolution = DAY_IN_MILLIS; 510 } 511 512 CharSequence timeClause = formatDateRange(c, time, time, FORMAT_SHOW_TIME); 513 514 String result; 515 if (duration < transitionResolution) { 516 CharSequence relativeClause = getRelativeTimeSpanString(time, now, minResolution, flags); 517 result = r.getString(com.android.internal.R.string.relative_time, relativeClause, timeClause); 518 } else { 519 CharSequence dateClause = getRelativeTimeSpanString(c, time, false); 520 result = r.getString(com.android.internal.R.string.date_time, dateClause, timeClause); 521 } 522 523 return result; 524 } 525 526 /** 527 * Returns a string describing a day relative to the current day. For example if the day is 528 * today this function returns "Today", if the day was a week ago it returns "7 days ago", and 529 * if the day is in 2 weeks it returns "in 14 days". 530 * 531 * @param r the resources to get the strings from 532 * @param day the relative day to describe in UTC milliseconds 533 * @param today the current time in UTC milliseconds 534 * @return a formatting string 535 */ 536 private static final String getRelativeDayString(Resources r, long day, long today) { 537 Time startTime = new Time(); 538 startTime.set(day); 539 Time currentTime = new Time(); 540 currentTime.set(today); 541 542 int startDay = Time.getJulianDay(day, startTime.gmtoff); 543 int currentDay = Time.getJulianDay(today, currentTime.gmtoff); 544 545 int days = Math.abs(currentDay - startDay); 546 boolean past = (today > day); 547 548 if (days == 1) { 549 if (past) { 550 return r.getString(com.android.internal.R.string.yesterday); 551 } else { 552 return r.getString(com.android.internal.R.string.tomorrow); 553 } 554 } else if (days == 0) { 555 return r.getString(com.android.internal.R.string.today); 556 } 557 558 int resId; 559 if (past) { 560 resId = com.android.internal.R.plurals.num_days_ago; 561 } else { 562 resId = com.android.internal.R.plurals.in_num_days; 563 } 564 565 String format = r.getQuantityString(resId, days); 566 return String.format(format, days); 567 } 568 569 private static void initFormatStrings() { 570 synchronized (sLock) { 571 Resources r = Resources.getSystem(); 572 Configuration cfg = r.getConfiguration(); 573 if (sLastConfig == null || !sLastConfig.equals(cfg)) { 574 sLastConfig = cfg; 575 sStatusTimeFormat = r.getString(com.android.internal.R.string.status_bar_time_format); 576 sElapsedFormatMMSS = r.getString(com.android.internal.R.string.elapsed_time_short_format_mm_ss); 577 sElapsedFormatHMMSS = r.getString(com.android.internal.R.string.elapsed_time_short_format_h_mm_ss); 578 } 579 } 580 } 581 582 /** 583 * Format a time so it appears like it would in the status bar clock. 584 * @deprecated use {@link #DateFormat.getTimeFormat(Context)} instead. 585 * @hide 586 */ 587 public static final CharSequence timeString(long millis) { 588 initFormatStrings(); 589 return DateFormat.format(sStatusTimeFormat, millis); 590 } 591 592 /** 593 * Formats an elapsed time in the form "MM:SS" or "H:MM:SS" 594 * for display on the call-in-progress screen. 595 * @param elapsedSeconds the elapsed time in seconds. 596 */ 597 public static String formatElapsedTime(long elapsedSeconds) { 598 initFormatStrings(); 599 600 long hours = 0; 601 long minutes = 0; 602 long seconds = 0; 603 604 if (elapsedSeconds >= 3600) { 605 hours = elapsedSeconds / 3600; 606 elapsedSeconds -= hours * 3600; 607 } 608 if (elapsedSeconds >= 60) { 609 minutes = elapsedSeconds / 60; 610 elapsedSeconds -= minutes * 60; 611 } 612 seconds = elapsedSeconds; 613 614 String result; 615 if (hours > 0) { 616 return formatElapsedTime(sElapsedFormatHMMSS, hours, minutes, seconds); 617 } else { 618 return formatElapsedTime(sElapsedFormatMMSS, minutes, seconds); 619 } 620 } 621 622 /** 623 * Fast formatting of h:mm:ss 624 */ 625 private static String formatElapsedTime(String format, long hours, long minutes, long seconds) { 626 if (FAST_FORMAT_HMMSS.equals(format)) { 627 StringBuffer sb = new StringBuffer(16); 628 sb.append(hours); 629 sb.append(TIME_SEPARATOR); 630 if (minutes < 10) { 631 sb.append(TIME_PADDING); 632 } else { 633 sb.append(toDigitChar(minutes / 10)); 634 } 635 sb.append(toDigitChar(minutes % 10)); 636 sb.append(TIME_SEPARATOR); 637 if (seconds < 10) { 638 sb.append(TIME_PADDING); 639 } else { 640 sb.append(toDigitChar(seconds / 10)); 641 } 642 sb.append(toDigitChar(seconds % 10)); 643 return sb.toString(); 644 } else { 645 return String.format(format, hours, minutes, seconds); 646 } 647 } 648 649 /** 650 * Fast formatting of m:ss 651 */ 652 private static String formatElapsedTime(String format, long minutes, long seconds) { 653 if (FAST_FORMAT_MMSS.equals(format)) { 654 StringBuffer sb = new StringBuffer(16); 655 if (minutes < 10) { 656 sb.append(TIME_PADDING); 657 } else { 658 sb.append(toDigitChar(minutes / 10)); 659 } 660 sb.append(toDigitChar(minutes % 10)); 661 sb.append(TIME_SEPARATOR); 662 if (seconds < 10) { 663 sb.append(TIME_PADDING); 664 } else { 665 sb.append(toDigitChar(seconds / 10)); 666 } 667 sb.append(toDigitChar(seconds % 10)); 668 return sb.toString(); 669 } else { 670 return String.format(format, minutes, seconds); 671 } 672 } 673 674 private static char toDigitChar(long digit) { 675 return (char) (digit + '0'); 676 } 677 678 /** 679 * Format a date / time such that if the then is on the same day as now, it shows 680 * just the time and if it's a different day, it shows just the date. 681 * 682 * <p>The parameters dateFormat and timeFormat should each be one of 683 * {@link java.text.DateFormat#DEFAULT}, 684 * {@link java.text.DateFormat#FULL}, 685 * {@link java.text.DateFormat#LONG}, 686 * {@link java.text.DateFormat#MEDIUM} 687 * or 688 * {@link java.text.DateFormat#SHORT} 689 * 690 * @param then the date to format 691 * @param now the base time 692 * @param dateStyle how to format the date portion. 693 * @param timeStyle how to format the time portion. 694 */ 695 public static final CharSequence formatSameDayTime(long then, long now, 696 int dateStyle, int timeStyle) { 697 Calendar thenCal = new GregorianCalendar(); 698 thenCal.setTimeInMillis(then); 699 Date thenDate = thenCal.getTime(); 700 Calendar nowCal = new GregorianCalendar(); 701 nowCal.setTimeInMillis(now); 702 703 java.text.DateFormat f; 704 705 if (thenCal.get(Calendar.YEAR) == nowCal.get(Calendar.YEAR) 706 && thenCal.get(Calendar.MONTH) == nowCal.get(Calendar.MONTH) 707 && thenCal.get(Calendar.DAY_OF_MONTH) == nowCal.get(Calendar.DAY_OF_MONTH)) { 708 f = java.text.DateFormat.getTimeInstance(timeStyle); 709 } else { 710 f = java.text.DateFormat.getDateInstance(dateStyle); 711 } 712 return f.format(thenDate); 713 } 714 715 /** 716 * @hide 717 * @deprecated use {@link android.text.format.Time} 718 */ 719 public static Calendar newCalendar(boolean zulu) 720 { 721 if (zulu) 722 return Calendar.getInstance(TimeZone.getTimeZone("GMT")); 723 724 return Calendar.getInstance(); 725 } 726 727 /** 728 * @return true if the supplied when is today else false 729 */ 730 public static boolean isToday(long when) { 731 Time time = new Time(); 732 time.set(when); 733 734 int thenYear = time.year; 735 int thenMonth = time.month; 736 int thenMonthDay = time.monthDay; 737 738 time.set(System.currentTimeMillis()); 739 return (thenYear == time.year) 740 && (thenMonth == time.month) 741 && (thenMonthDay == time.monthDay); 742 } 743 744 /** 745 * @hide 746 * @deprecated use {@link android.text.format.Time} 747 */ 748 private static final int ctoi(String str, int index) 749 throws DateException 750 { 751 char c = str.charAt(index); 752 if (c >= '0' && c <= '9') { 753 return (int)(c - '0'); 754 } 755 throw new DateException("Expected numeric character. Got '" + 756 c + "'"); 757 } 758 759 /** 760 * @hide 761 * @deprecated use {@link android.text.format.Time} 762 */ 763 private static final int check(int lowerBound, int upperBound, int value) 764 throws DateException 765 { 766 if (value >= lowerBound && value <= upperBound) { 767 return value; 768 } 769 throw new DateException("field out of bounds. max=" + upperBound 770 + " value=" + value); 771 } 772 773 /** 774 * @hide 775 * @deprecated use {@link android.text.format.Time} 776 * Return true if this date string is local time 777 */ 778 public static boolean isUTC(String s) 779 { 780 if (s.length() == 16 && s.charAt(15) == 'Z') { 781 return true; 782 } 783 if (s.length() == 9 && s.charAt(8) == 'Z') { 784 // XXX not sure if this case possible/valid 785 return true; 786 } 787 return false; 788 } 789 790 791 // note that month in Calendar is 0 based and in all other human 792 // representations, it's 1 based. 793 // Returns if the Z was present, meaning that the time is in UTC 794 /** 795 * @hide 796 * @deprecated use {@link android.text.format.Time} 797 */ 798 public static boolean parseDateTime(String str, Calendar cal) 799 throws DateException 800 { 801 int len = str.length(); 802 boolean dateTime = (len == 15 || len == 16) && str.charAt(8) == 'T'; 803 boolean justDate = len == 8; 804 if (dateTime || justDate) { 805 cal.clear(); 806 cal.set(Calendar.YEAR, 807 ctoi(str, 0)*1000 + ctoi(str, 1)*100 808 + ctoi(str, 2)*10 + ctoi(str, 3)); 809 cal.set(Calendar.MONTH, 810 check(0, 11, ctoi(str, 4)*10 + ctoi(str, 5) - 1)); 811 cal.set(Calendar.DAY_OF_MONTH, 812 check(1, 31, ctoi(str, 6)*10 + ctoi(str, 7))); 813 if (dateTime) { 814 cal.set(Calendar.HOUR_OF_DAY, 815 check(0, 23, ctoi(str, 9)*10 + ctoi(str, 10))); 816 cal.set(Calendar.MINUTE, 817 check(0, 59, ctoi(str, 11)*10 + ctoi(str, 12))); 818 cal.set(Calendar.SECOND, 819 check(0, 59, ctoi(str, 13)*10 + ctoi(str, 14))); 820 } 821 if (justDate) { 822 cal.set(Calendar.HOUR_OF_DAY, 0); 823 cal.set(Calendar.MINUTE, 0); 824 cal.set(Calendar.SECOND, 0); 825 return true; 826 } 827 if (len == 15) { 828 return false; 829 } 830 if (str.charAt(15) == 'Z') { 831 return true; 832 } 833 } 834 throw new DateException("Invalid time (expected " 835 + "YYYYMMDDThhmmssZ? got '" + str + "')."); 836 } 837 838 /** 839 * Given a timezone string which can be null, and a dateTime string, 840 * set that time into a calendar. 841 * @hide 842 * @deprecated use {@link android.text.format.Time} 843 */ 844 public static void parseDateTime(String tz, String dateTime, Calendar out) 845 throws DateException 846 { 847 TimeZone timezone; 848 if (DateUtils.isUTC(dateTime)) { 849 timezone = TimeZone.getTimeZone("UTC"); 850 } 851 else if (tz == null) { 852 timezone = TimeZone.getDefault(); 853 } 854 else { 855 timezone = TimeZone.getTimeZone(tz); 856 } 857 858 Calendar local = new GregorianCalendar(timezone); 859 DateUtils.parseDateTime(dateTime, local); 860 861 out.setTimeInMillis(local.getTimeInMillis()); 862 } 863 864 865 /** 866 * Return a string containing the date and time in RFC2445 format. 867 * Ensures that the time is written in UTC. The Calendar class doesn't 868 * really help out with this, so this is slower than it ought to be. 869 * 870 * @param cal the date and time to write 871 * @hide 872 * @deprecated use {@link android.text.format.Time} 873 */ 874 public static String writeDateTime(Calendar cal) 875 { 876 TimeZone tz = TimeZone.getTimeZone("GMT"); 877 GregorianCalendar c = new GregorianCalendar(tz); 878 c.setTimeInMillis(cal.getTimeInMillis()); 879 return writeDateTime(c, true); 880 } 881 882 /** 883 * Return a string containing the date and time in RFC2445 format. 884 * 885 * @param cal the date and time to write 886 * @param zulu If the calendar is in UTC, pass true, and a Z will 887 * be written at the end as per RFC2445. Otherwise, the time is 888 * considered in localtime. 889 * @hide 890 * @deprecated use {@link android.text.format.Time} 891 */ 892 public static String writeDateTime(Calendar cal, boolean zulu) 893 { 894 StringBuilder sb = new StringBuilder(); 895 sb.ensureCapacity(16); 896 if (zulu) { 897 sb.setLength(16); 898 sb.setCharAt(15, 'Z'); 899 } else { 900 sb.setLength(15); 901 } 902 return writeDateTime(cal, sb); 903 } 904 905 /** 906 * Return a string containing the date and time in RFC2445 format. 907 * 908 * @param cal the date and time to write 909 * @param sb a StringBuilder to use. It is assumed that setLength 910 * has already been called on sb to the appropriate length 911 * which is sb.setLength(zulu ? 16 : 15) 912 * @hide 913 * @deprecated use {@link android.text.format.Time} 914 */ 915 public static String writeDateTime(Calendar cal, StringBuilder sb) 916 { 917 int n; 918 919 n = cal.get(Calendar.YEAR); 920 sb.setCharAt(3, (char)('0'+n%10)); 921 n /= 10; 922 sb.setCharAt(2, (char)('0'+n%10)); 923 n /= 10; 924 sb.setCharAt(1, (char)('0'+n%10)); 925 n /= 10; 926 sb.setCharAt(0, (char)('0'+n%10)); 927 928 n = cal.get(Calendar.MONTH) + 1; 929 sb.setCharAt(5, (char)('0'+n%10)); 930 n /= 10; 931 sb.setCharAt(4, (char)('0'+n%10)); 932 933 n = cal.get(Calendar.DAY_OF_MONTH); 934 sb.setCharAt(7, (char)('0'+n%10)); 935 n /= 10; 936 sb.setCharAt(6, (char)('0'+n%10)); 937 938 sb.setCharAt(8, 'T'); 939 940 n = cal.get(Calendar.HOUR_OF_DAY); 941 sb.setCharAt(10, (char)('0'+n%10)); 942 n /= 10; 943 sb.setCharAt(9, (char)('0'+n%10)); 944 945 n = cal.get(Calendar.MINUTE); 946 sb.setCharAt(12, (char)('0'+n%10)); 947 n /= 10; 948 sb.setCharAt(11, (char)('0'+n%10)); 949 950 n = cal.get(Calendar.SECOND); 951 sb.setCharAt(14, (char)('0'+n%10)); 952 n /= 10; 953 sb.setCharAt(13, (char)('0'+n%10)); 954 955 return sb.toString(); 956 } 957 958 /** 959 * @hide 960 * @deprecated use {@link android.text.format.Time} 961 */ 962 public static void assign(Calendar lval, Calendar rval) 963 { 964 // there should be a faster way. 965 lval.clear(); 966 lval.setTimeInMillis(rval.getTimeInMillis()); 967 } 968 969 /** 970 * Formats a date or a time range according to the local conventions. 971 * 972 * <p> 973 * Example output strings (date formats in these examples are shown using 974 * the US date format convention but that may change depending on the 975 * local settings): 976 * <ul> 977 * <li>10:15am</li> 978 * <li>3:00pm - 4:00pm</li> 979 * <li>3pm - 4pm</li> 980 * <li>3PM - 4PM</li> 981 * <li>08:00 - 17:00</li> 982 * <li>Oct 9</li> 983 * <li>Tue, Oct 9</li> 984 * <li>October 9, 2007</li> 985 * <li>Oct 9 - 10</li> 986 * <li>Oct 9 - 10, 2007</li> 987 * <li>Oct 28 - Nov 3, 2007</li> 988 * <li>Dec 31, 2007 - Jan 1, 2008</li> 989 * <li>Oct 9, 8:00am - Oct 10, 5:00pm</li> 990 * <li>12/31/2007 - 01/01/2008</li> 991 * </ul> 992 * 993 * <p> 994 * The flags argument is a bitmask of options from the following list: 995 * 996 * <ul> 997 * <li>FORMAT_SHOW_TIME</li> 998 * <li>FORMAT_SHOW_WEEKDAY</li> 999 * <li>FORMAT_SHOW_YEAR</li> 1000 * <li>FORMAT_NO_YEAR</li> 1001 * <li>FORMAT_SHOW_DATE</li> 1002 * <li>FORMAT_NO_MONTH_DAY</li> 1003 * <li>FORMAT_12HOUR</li> 1004 * <li>FORMAT_24HOUR</li> 1005 * <li>FORMAT_CAP_AMPM</li> 1006 * <li>FORMAT_NO_NOON</li> 1007 * <li>FORMAT_CAP_NOON</li> 1008 * <li>FORMAT_NO_MIDNIGHT</li> 1009 * <li>FORMAT_CAP_MIDNIGHT</li> 1010 * <li>FORMAT_UTC</li> 1011 * <li>FORMAT_ABBREV_TIME</li> 1012 * <li>FORMAT_ABBREV_WEEKDAY</li> 1013 * <li>FORMAT_ABBREV_MONTH</li> 1014 * <li>FORMAT_ABBREV_ALL</li> 1015 * <li>FORMAT_NUMERIC_DATE</li> 1016 * </ul> 1017 * 1018 * <p> 1019 * If FORMAT_SHOW_TIME is set, the time is shown as part of the date range. 1020 * If the start and end time are the same, then just the start time is 1021 * shown. 1022 * 1023 * <p> 1024 * If FORMAT_SHOW_WEEKDAY is set, then the weekday is shown. 1025 * 1026 * <p> 1027 * If FORMAT_SHOW_YEAR is set, then the year is always shown. 1028 * If FORMAT_NO_YEAR is set, then the year is not shown. 1029 * If neither FORMAT_SHOW_YEAR nor FORMAT_NO_YEAR are set, then the year 1030 * is shown only if it is different from the current year, or if the start 1031 * and end dates fall on different years. 1032 * 1033 * <p> 1034 * Normally the date is shown unless the start and end day are the same. 1035 * If FORMAT_SHOW_DATE is set, then the date is always shown, even for 1036 * same day ranges. 1037 * 1038 * <p> 1039 * If FORMAT_NO_MONTH_DAY is set, then if the date is shown, just the 1040 * month name will be shown, not the day of the month. For example, 1041 * "January, 2008" instead of "January 6 - 12, 2008". 1042 * 1043 * <p> 1044 * If FORMAT_CAP_AMPM is set and 12-hour time is used, then the "AM" 1045 * and "PM" are capitalized. 1046 * 1047 * <p> 1048 * If FORMAT_NO_NOON is set and 12-hour time is used, then "12pm" is 1049 * shown instead of "noon". 1050 * 1051 * <p> 1052 * If FORMAT_CAP_NOON is set and 12-hour time is used, then "Noon" is 1053 * shown instead of "noon". 1054 * 1055 * <p> 1056 * If FORMAT_NO_MIDNIGHT is set and 12-hour time is used, then "12am" is 1057 * shown instead of "midnight". 1058 * 1059 * <p> 1060 * If FORMAT_CAP_NOON is set and 12-hour time is used, then "Midnight" is 1061 * shown instead of "midnight". 1062 * 1063 * <p> 1064 * If FORMAT_12HOUR is set and the time is shown, then the time is 1065 * shown in the 12-hour time format. You should not normally set this. 1066 * Instead, let the time format be chosen automatically according to the 1067 * system settings. If both FORMAT_12HOUR and FORMAT_24HOUR are set, then 1068 * FORMAT_24HOUR takes precedence. 1069 * 1070 * <p> 1071 * If FORMAT_24HOUR is set and the time is shown, then the time is 1072 * shown in the 24-hour time format. You should not normally set this. 1073 * Instead, let the time format be chosen automatically according to the 1074 * system settings. If both FORMAT_12HOUR and FORMAT_24HOUR are set, then 1075 * FORMAT_24HOUR takes precedence. 1076 * 1077 * <p> 1078 * If FORMAT_UTC is set, then the UTC timezone is used for the start 1079 * and end milliseconds. 1080 * 1081 * <p> 1082 * If FORMAT_ABBREV_TIME is set and 12-hour time format is used, then the 1083 * start and end times (if shown) are abbreviated by not showing the minutes 1084 * if they are zero. For example, instead of "3:00pm" the time would be 1085 * abbreviated to "3pm". 1086 * 1087 * <p> 1088 * If FORMAT_ABBREV_WEEKDAY is set, then the weekday (if shown) is 1089 * abbreviated to a 3-letter string. 1090 * 1091 * <p> 1092 * If FORMAT_ABBREV_MONTH is set, then the month (if shown) is abbreviated 1093 * to a 3-letter string. 1094 * 1095 * <p> 1096 * If FORMAT_ABBREV_ALL is set, then the weekday and the month (if shown) 1097 * are abbreviated to 3-letter strings. 1098 * 1099 * <p> 1100 * If FORMAT_NUMERIC_DATE is set, then the date is shown in numeric format 1101 * instead of using the name of the month. For example, "12/31/2008" 1102 * instead of "December 31, 2008". 1103 * 1104 * @param context the context is required only if the time is shown 1105 * @param startMillis the start time in UTC milliseconds 1106 * @param endMillis the end time in UTC milliseconds 1107 * @param flags a bit mask of options 1108 * 1109 * @return a string containing the formatted date/time range. 1110 */ 1111 public static String formatDateRange(Context context, long startMillis, 1112 long endMillis, int flags) { 1113 Resources res = Resources.getSystem(); 1114 boolean showTime = (flags & FORMAT_SHOW_TIME) != 0; 1115 boolean showWeekDay = (flags & FORMAT_SHOW_WEEKDAY) != 0; 1116 boolean showYear = (flags & FORMAT_SHOW_YEAR) != 0; 1117 boolean noYear = (flags & FORMAT_NO_YEAR) != 0; 1118 boolean useUTC = (flags & FORMAT_UTC) != 0; 1119 boolean abbrevWeekDay = (flags & (FORMAT_ABBREV_WEEKDAY | FORMAT_ABBREV_ALL)) != 0; 1120 boolean abbrevMonth = (flags & (FORMAT_ABBREV_MONTH | FORMAT_ABBREV_ALL)) != 0; 1121 boolean noMonthDay = (flags & FORMAT_NO_MONTH_DAY) != 0; 1122 boolean numericDate = (flags & FORMAT_NUMERIC_DATE) != 0; 1123 1124 Time startDate; 1125 Time endDate; 1126 1127 if (useUTC) { 1128 startDate = new Time(Time.TIMEZONE_UTC); 1129 endDate = new Time(Time.TIMEZONE_UTC); 1130 } else { 1131 startDate = new Time(); 1132 endDate = new Time(); 1133 } 1134 1135 startDate.set(startMillis); 1136 endDate.set(endMillis); 1137 int startJulianDay = Time.getJulianDay(startMillis, startDate.gmtoff); 1138 int endJulianDay = Time.getJulianDay(endMillis, endDate.gmtoff); 1139 int dayDistance = endJulianDay - startJulianDay; 1140 1141 // If the end date ends at 12am at the beginning of a day, 1142 // then modify it to make it look like it ends at midnight on 1143 // the previous day. This will allow us to display "8pm - midnight", 1144 // for example, instead of "Nov 10, 8pm - Nov 11, 12am". But we only do 1145 // this if it is midnight of the same day as the start date because 1146 // for multiple-day events, an end time of "midnight on Nov 11" is 1147 // ambiguous and confusing (is that midnight the start of Nov 11, or 1148 // the end of Nov 11?). 1149 // If we are not showing the time then also adjust the end date 1150 // for multiple-day events. This is to allow us to display, for 1151 // example, "Nov 10 -11" for an event with a start date of Nov 10 1152 // and an end date of Nov 12 at 00:00. 1153 // If the start and end time are the same, then skip this and don't 1154 // adjust the date. 1155 if ((endDate.hour | endDate.minute | endDate.second) == 0 1156 && (!showTime || dayDistance <= 1) && (startMillis != endMillis)) { 1157 endDate.monthDay -= 1; 1158 endDate.normalize(true /* ignore isDst */); 1159 } 1160 1161 int startDay = startDate.monthDay; 1162 int startMonthNum = startDate.month; 1163 int startYear = startDate.year; 1164 1165 int endDay = endDate.monthDay; 1166 int endMonthNum = endDate.month; 1167 int endYear = endDate.year; 1168 1169 String startWeekDayString = ""; 1170 String endWeekDayString = ""; 1171 if (showWeekDay) { 1172 String weekDayFormat = ""; 1173 if (abbrevWeekDay) { 1174 weekDayFormat = ABBREV_WEEKDAY_FORMAT; 1175 } else { 1176 weekDayFormat = WEEKDAY_FORMAT; 1177 } 1178 startWeekDayString = startDate.format(weekDayFormat); 1179 endWeekDayString = endDate.format(weekDayFormat); 1180 } 1181 1182 String startTimeString = ""; 1183 String endTimeString = ""; 1184 if (showTime) { 1185 String startTimeFormat = ""; 1186 String endTimeFormat = ""; 1187 boolean force24Hour = (flags & FORMAT_24HOUR) != 0; 1188 boolean force12Hour = (flags & FORMAT_12HOUR) != 0; 1189 boolean use24Hour; 1190 if (force24Hour) { 1191 use24Hour = true; 1192 } else if (force12Hour) { 1193 use24Hour = false; 1194 } else { 1195 use24Hour = DateFormat.is24HourFormat(context); 1196 } 1197 if (use24Hour) { 1198 startTimeFormat = HOUR_MINUTE_24; 1199 endTimeFormat = HOUR_MINUTE_24; 1200 } else { 1201 boolean abbrevTime = (flags & (FORMAT_ABBREV_TIME | FORMAT_ABBREV_ALL)) != 0; 1202 boolean capAMPM = (flags & FORMAT_CAP_AMPM) != 0; 1203 boolean noNoon = (flags & FORMAT_NO_NOON) != 0; 1204 boolean capNoon = (flags & FORMAT_CAP_NOON) != 0; 1205 boolean noMidnight = (flags & FORMAT_NO_MIDNIGHT) != 0; 1206 boolean capMidnight = (flags & FORMAT_CAP_MIDNIGHT) != 0; 1207 1208 boolean startOnTheHour = startDate.minute == 0 && startDate.second == 0; 1209 boolean endOnTheHour = endDate.minute == 0 && endDate.second == 0; 1210 if (abbrevTime && startOnTheHour) { 1211 if (capAMPM) { 1212 startTimeFormat = res.getString(com.android.internal.R.string.hour_cap_ampm); 1213 } else { 1214 startTimeFormat = res.getString(com.android.internal.R.string.hour_ampm); 1215 } 1216 } else { 1217 if (capAMPM) { 1218 startTimeFormat = res.getString(com.android.internal.R.string.hour_minute_cap_ampm); 1219 } else { 1220 startTimeFormat = res.getString(com.android.internal.R.string.hour_minute_ampm); 1221 } 1222 } 1223 if (abbrevTime && endOnTheHour) { 1224 if (capAMPM) { 1225 endTimeFormat = res.getString(com.android.internal.R.string.hour_cap_ampm); 1226 } else { 1227 endTimeFormat = res.getString(com.android.internal.R.string.hour_ampm); 1228 } 1229 } else { 1230 if (capAMPM) { 1231 endTimeFormat = res.getString(com.android.internal.R.string.hour_minute_cap_ampm); 1232 } else { 1233 endTimeFormat = res.getString(com.android.internal.R.string.hour_minute_ampm); 1234 } 1235 } 1236 1237 if (startDate.hour == 12 && startOnTheHour && !noNoon) { 1238 if (capNoon) { 1239 startTimeFormat = res.getString(com.android.internal.R.string.Noon); 1240 } else { 1241 startTimeFormat = res.getString(com.android.internal.R.string.noon); 1242 } 1243 // Don't show the start time starting at midnight. Show 1244 // 12am instead. 1245 } 1246 1247 if (endDate.hour == 12 && endOnTheHour && !noNoon) { 1248 if (capNoon) { 1249 endTimeFormat = res.getString(com.android.internal.R.string.Noon); 1250 } else { 1251 endTimeFormat = res.getString(com.android.internal.R.string.noon); 1252 } 1253 } else if (endDate.hour == 0 && endOnTheHour && !noMidnight) { 1254 if (capMidnight) { 1255 endTimeFormat = res.getString(com.android.internal.R.string.Midnight); 1256 } else { 1257 endTimeFormat = res.getString(com.android.internal.R.string.midnight); 1258 } 1259 } 1260 } 1261 startTimeString = startDate.format(startTimeFormat); 1262 endTimeString = endDate.format(endTimeFormat); 1263 } 1264 1265 // Get the current year 1266 long millis = System.currentTimeMillis(); 1267 Time time = new Time(); 1268 time.set(millis); 1269 int currentYear = time.year; 1270 1271 // Show the year if the user specified FORMAT_SHOW_YEAR or if 1272 // the starting and end years are different from each other 1273 // or from the current year. But don't show the year if the 1274 // user specified FORMAT_NO_YEAR; 1275 showYear = showYear || (!noYear && (startYear != endYear || startYear != currentYear)); 1276 1277 String defaultDateFormat, fullFormat, dateRange; 1278 if (numericDate) { 1279 defaultDateFormat = res.getString(com.android.internal.R.string.numeric_date); 1280 } else if (showYear) { 1281 if (abbrevMonth) { 1282 if (noMonthDay) { 1283 defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month_year); 1284 } else { 1285 defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month_day_year); 1286 } 1287 } else { 1288 if (noMonthDay) { 1289 defaultDateFormat = res.getString(com.android.internal.R.string.month_year); 1290 } else { 1291 defaultDateFormat = res.getString(com.android.internal.R.string.month_day_year); 1292 } 1293 } 1294 } else { 1295 if (abbrevMonth) { 1296 if (noMonthDay) { 1297 defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month); 1298 } else { 1299 defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month_day); 1300 } 1301 } else { 1302 if (noMonthDay) { 1303 defaultDateFormat = res.getString(com.android.internal.R.string.month); 1304 } else { 1305 defaultDateFormat = res.getString(com.android.internal.R.string.month_day); 1306 } 1307 } 1308 } 1309 1310 if (showWeekDay) { 1311 if (showTime) { 1312 fullFormat = res.getString(com.android.internal.R.string.wday1_date1_time1_wday2_date2_time2); 1313 } else { 1314 fullFormat = res.getString(com.android.internal.R.string.wday1_date1_wday2_date2); 1315 } 1316 } else { 1317 if (showTime) { 1318 fullFormat = res.getString(com.android.internal.R.string.date1_time1_date2_time2); 1319 } else { 1320 fullFormat = res.getString(com.android.internal.R.string.date1_date2); 1321 } 1322 } 1323 1324 if (noMonthDay && startMonthNum == endMonthNum) { 1325 // Example: "January, 2008" 1326 String startDateString = startDate.format(defaultDateFormat); 1327 return startDateString; 1328 } 1329 1330 if (startYear != endYear || noMonthDay) { 1331 // Different year or we are not showing the month day number. 1332 // Example: "December 31, 2007 - January 1, 2008" 1333 // Or: "January - February, 2008" 1334 String startDateString = startDate.format(defaultDateFormat); 1335 String endDateString = endDate.format(defaultDateFormat); 1336 1337 // The values that are used in a fullFormat string are specified 1338 // by position. 1339 dateRange = String.format(fullFormat, 1340 startWeekDayString, startDateString, startTimeString, 1341 endWeekDayString, endDateString, endTimeString); 1342 return dateRange; 1343 } 1344 1345 // Get the month, day, and year strings for the start and end dates 1346 String monthFormat; 1347 if (numericDate) { 1348 monthFormat = NUMERIC_MONTH_FORMAT; 1349 } else if (abbrevMonth) { 1350 monthFormat = ABBREV_MONTH_FORMAT; 1351 } else { 1352 monthFormat = MONTH_FORMAT; 1353 } 1354 String startMonthString = startDate.format(monthFormat); 1355 String startMonthDayString = startDate.format(MONTH_DAY_FORMAT); 1356 String startYearString = startDate.format(YEAR_FORMAT); 1357 String endMonthString = endDate.format(monthFormat); 1358 String endMonthDayString = endDate.format(MONTH_DAY_FORMAT); 1359 String endYearString = endDate.format(YEAR_FORMAT); 1360 1361 if (startMonthNum != endMonthNum) { 1362 // Same year, different month. 1363 // Example: "October 28 - November 3" 1364 // or: "Wed, Oct 31 - Sat, Nov 3, 2007" 1365 // or: "Oct 31, 8am - Sat, Nov 3, 2007, 5pm" 1366 1367 int index = 0; 1368 if (showWeekDay) index = 1; 1369 if (showYear) index += 2; 1370 if (showTime) index += 4; 1371 if (numericDate) index += 8; 1372 int resId = sameYearTable[index]; 1373 fullFormat = res.getString(resId); 1374 1375 // The values that are used in a fullFormat string are specified 1376 // by position. 1377 dateRange = String.format(fullFormat, 1378 startWeekDayString, startMonthString, startMonthDayString, 1379 startYearString, startTimeString, 1380 endWeekDayString, endMonthString, endMonthDayString, 1381 endYearString, endTimeString); 1382 return dateRange; 1383 } 1384 1385 if (startDay != endDay) { 1386 // Same month, different day. 1387 int index = 0; 1388 if (showWeekDay) index = 1; 1389 if (showYear) index += 2; 1390 if (showTime) index += 4; 1391 if (numericDate) index += 8; 1392 int resId = sameMonthTable[index]; 1393 fullFormat = res.getString(resId); 1394 1395 // The values that are used in a fullFormat string are specified 1396 // by position. 1397 dateRange = String.format(fullFormat, 1398 startWeekDayString, startMonthString, startMonthDayString, 1399 startYearString, startTimeString, 1400 endWeekDayString, endMonthString, endMonthDayString, 1401 endYearString, endTimeString); 1402 return dateRange; 1403 } 1404 1405 // Same start and end day 1406 boolean showDate = (flags & FORMAT_SHOW_DATE) != 0; 1407 1408 // If nothing was specified, then show the date. 1409 if (!showTime && !showDate && !showWeekDay) showDate = true; 1410 1411 // Compute the time string (example: "10:00 - 11:00 am") 1412 String timeString = ""; 1413 if (showTime) { 1414 // If the start and end time are the same, then just show the 1415 // start time. 1416 if (startMillis == endMillis) { 1417 // Same start and end time. 1418 // Example: "10:15 AM" 1419 timeString = startTimeString; 1420 } else { 1421 // Example: "10:00 - 11:00 am" 1422 String timeFormat = res.getString(com.android.internal.R.string.time1_time2); 1423 timeString = String.format(timeFormat, startTimeString, endTimeString); 1424 } 1425 } 1426 1427 // Figure out which full format to use. 1428 fullFormat = ""; 1429 String dateString = ""; 1430 if (showDate) { 1431 dateString = startDate.format(defaultDateFormat); 1432 if (showWeekDay) { 1433 if (showTime) { 1434 // Example: "10:00 - 11:00 am, Tue, Oct 9" 1435 fullFormat = res.getString(com.android.internal.R.string.time_wday_date); 1436 } else { 1437 // Example: "Tue, Oct 9" 1438 fullFormat = res.getString(com.android.internal.R.string.wday_date); 1439 } 1440 } else { 1441 if (showTime) { 1442 // Example: "10:00 - 11:00 am, Oct 9" 1443 fullFormat = res.getString(com.android.internal.R.string.time_date); 1444 } else { 1445 // Example: "Oct 9" 1446 return dateString; 1447 } 1448 } 1449 } else if (showWeekDay) { 1450 if (showTime) { 1451 // Example: "10:00 - 11:00 am, Tue" 1452 fullFormat = res.getString(com.android.internal.R.string.time_wday); 1453 } else { 1454 // Example: "Tue" 1455 return startWeekDayString; 1456 } 1457 } else if (showTime) { 1458 return timeString; 1459 } 1460 1461 // The values that are used in a fullFormat string are specified 1462 // by position. 1463 dateRange = String.format(fullFormat, timeString, startWeekDayString, dateString); 1464 return dateRange; 1465 } 1466 1467 /** 1468 * Formats a date or a time according to the local conventions. There are 1469 * lots of options that allow the caller to control, for example, if the 1470 * time is shown, if the day of the week is shown, if the month name is 1471 * abbreviated, if noon is shown instead of 12pm, and so on. For the 1472 * complete list of options, see the documentation for 1473 * {@link #formatDateRange}. 1474 * <p> 1475 * Example output strings (date formats in these examples are shown using 1476 * the US date format convention but that may change depending on the 1477 * local settings): 1478 * <ul> 1479 * <li>10:15am</li> 1480 * <li>3:00pm</li> 1481 * <li>3pm</li> 1482 * <li>3PM</li> 1483 * <li>08:00</li> 1484 * <li>17:00</li> 1485 * <li>noon</li> 1486 * <li>Noon</li> 1487 * <li>midnight</li> 1488 * <li>Midnight</li> 1489 * <li>Oct 31</li> 1490 * <li>Oct 31, 2007</li> 1491 * <li>October 31, 2007</li> 1492 * <li>10am, Oct 31</li> 1493 * <li>17:00, Oct 31</li> 1494 * <li>Wed</li> 1495 * <li>Wednesday</li> 1496 * <li>10am, Wed, Oct 31</li> 1497 * <li>Wed, Oct 31</li> 1498 * <li>Wednesday, Oct 31</li> 1499 * <li>Wed, Oct 31, 2007</li> 1500 * <li>Wed, October 31</li> 1501 * <li>10/31/2007</li> 1502 * </ul> 1503 * 1504 * @param context the context is required only if the time is shown 1505 * @param millis a point in time in UTC milliseconds 1506 * @param flags a bit mask of formatting options 1507 * @return a string containing the formatted date/time. 1508 */ 1509 public static String formatDateTime(Context context, long millis, int flags) { 1510 return formatDateRange(context, millis, millis, flags); 1511 } 1512 1513 /** 1514 * @return a relative time string to display the time expressed by millis. Times 1515 * are counted starting at midnight, which means that assuming that the current 1516 * time is March 31st, 0:30: 1517 * <ul> 1518 * <li>"millis=0:10 today" will be displayed as "0:10"</li> 1519 * <li>"millis=11:30pm the day before" will be displayed as "Mar 30"</li> 1520 * </ul> 1521 * If the given millis is in a different year, then the full date is 1522 * returned in numeric format (e.g., "10/12/2008"). 1523 * 1524 * @param withPreposition If true, the string returned will include the correct 1525 * preposition ("at 9:20am", "on 10/12/2008" or "on May 29"). 1526 */ 1527 public static CharSequence getRelativeTimeSpanString(Context c, long millis, 1528 boolean withPreposition) { 1529 1530 long now = System.currentTimeMillis(); 1531 long span = now - millis; 1532 1533 if (sNowTime == null) { 1534 sNowTime = new Time(); 1535 sThenTime = new Time(); 1536 } 1537 1538 sNowTime.set(now); 1539 sThenTime.set(millis); 1540 1541 String result; 1542 int prepositionId; 1543 if (span < DAY_IN_MILLIS && sNowTime.weekDay == sThenTime.weekDay) { 1544 // Same day 1545 int flags = FORMAT_SHOW_TIME; 1546 result = formatDateRange(c, millis, millis, flags); 1547 prepositionId = R.string.preposition_for_time; 1548 } else if (sNowTime.year != sThenTime.year) { 1549 // Different years 1550 int flags = FORMAT_SHOW_DATE | FORMAT_SHOW_YEAR | FORMAT_NUMERIC_DATE; 1551 result = formatDateRange(c, millis, millis, flags); 1552 1553 // This is a date (like "10/31/2008" so use the date preposition) 1554 prepositionId = R.string.preposition_for_date; 1555 } else { 1556 // Default 1557 int flags = FORMAT_SHOW_DATE | FORMAT_ABBREV_MONTH; 1558 result = formatDateRange(c, millis, millis, flags); 1559 prepositionId = R.string.preposition_for_date; 1560 } 1561 if (withPreposition) { 1562 Resources res = c.getResources(); 1563 result = res.getString(prepositionId, result); 1564 } 1565 return result; 1566 } 1567 1568 /** 1569 * Convenience function to return relative time string without preposition. 1570 * @param c context for resources 1571 * @param millis time in milliseconds 1572 * @return {@link CharSequence} containing relative time. 1573 * @see #getRelativeTimeSpanString(Context, long, boolean) 1574 */ 1575 public static CharSequence getRelativeTimeSpanString(Context c, long millis) { 1576 return getRelativeTimeSpanString(c, millis, false /* no preposition */); 1577 } 1578 1579 private static Time sNowTime; 1580 private static Time sThenTime; 1581} 1582