DateUtils.java revision 9066cfe9886ac131c34d59ed0e2d287b0e3c0087
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 return formatElapsedTime(null, elapsedSeconds); 599 } 600 601 /** 602 * Formats an elapsed time in the form "MM:SS" or "H:MM:SS" 603 * for display on the call-in-progress screen. 604 * 605 * @param recycle {@link StringBuilder} to recycle, if possible 606 * @param elapsedSeconds the elapsed time in seconds. 607 */ 608 public static String formatElapsedTime(StringBuilder recycle, long elapsedSeconds) { 609 initFormatStrings(); 610 611 long hours = 0; 612 long minutes = 0; 613 long seconds = 0; 614 615 if (elapsedSeconds >= 3600) { 616 hours = elapsedSeconds / 3600; 617 elapsedSeconds -= hours * 3600; 618 } 619 if (elapsedSeconds >= 60) { 620 minutes = elapsedSeconds / 60; 621 elapsedSeconds -= minutes * 60; 622 } 623 seconds = elapsedSeconds; 624 625 String result; 626 if (hours > 0) { 627 return formatElapsedTime(recycle, sElapsedFormatHMMSS, hours, minutes, seconds); 628 } else { 629 return formatElapsedTime(recycle, sElapsedFormatMMSS, minutes, seconds); 630 } 631 } 632 633 /** 634 * Fast formatting of h:mm:ss 635 */ 636 private static String formatElapsedTime(StringBuilder recycle, String format, long hours, 637 long minutes, long seconds) { 638 if (FAST_FORMAT_HMMSS.equals(format)) { 639 StringBuilder sb = recycle; 640 if (sb == null) { 641 sb = new StringBuilder(8); 642 } else { 643 sb.setLength(0); 644 } 645 sb.append(hours); 646 sb.append(TIME_SEPARATOR); 647 if (minutes < 10) { 648 sb.append(TIME_PADDING); 649 } else { 650 sb.append(toDigitChar(minutes / 10)); 651 } 652 sb.append(toDigitChar(minutes % 10)); 653 sb.append(TIME_SEPARATOR); 654 if (seconds < 10) { 655 sb.append(TIME_PADDING); 656 } else { 657 sb.append(toDigitChar(seconds / 10)); 658 } 659 sb.append(toDigitChar(seconds % 10)); 660 return sb.toString(); 661 } else { 662 return String.format(format, hours, minutes, seconds); 663 } 664 } 665 666 /** 667 * Fast formatting of m:ss 668 */ 669 private static String formatElapsedTime(StringBuilder recycle, String format, long minutes, 670 long seconds) { 671 if (FAST_FORMAT_MMSS.equals(format)) { 672 StringBuilder sb = recycle; 673 if (sb == null) { 674 sb = new StringBuilder(8); 675 } else { 676 sb.setLength(0); 677 } 678 if (minutes < 10) { 679 sb.append(TIME_PADDING); 680 } else { 681 sb.append(toDigitChar(minutes / 10)); 682 } 683 sb.append(toDigitChar(minutes % 10)); 684 sb.append(TIME_SEPARATOR); 685 if (seconds < 10) { 686 sb.append(TIME_PADDING); 687 } else { 688 sb.append(toDigitChar(seconds / 10)); 689 } 690 sb.append(toDigitChar(seconds % 10)); 691 return sb.toString(); 692 } else { 693 return String.format(format, minutes, seconds); 694 } 695 } 696 697 private static char toDigitChar(long digit) { 698 return (char) (digit + '0'); 699 } 700 701 /** 702 * Format a date / time such that if the then is on the same day as now, it shows 703 * just the time and if it's a different day, it shows just the date. 704 * 705 * <p>The parameters dateFormat and timeFormat should each be one of 706 * {@link java.text.DateFormat#DEFAULT}, 707 * {@link java.text.DateFormat#FULL}, 708 * {@link java.text.DateFormat#LONG}, 709 * {@link java.text.DateFormat#MEDIUM} 710 * or 711 * {@link java.text.DateFormat#SHORT} 712 * 713 * @param then the date to format 714 * @param now the base time 715 * @param dateStyle how to format the date portion. 716 * @param timeStyle how to format the time portion. 717 */ 718 public static final CharSequence formatSameDayTime(long then, long now, 719 int dateStyle, int timeStyle) { 720 Calendar thenCal = new GregorianCalendar(); 721 thenCal.setTimeInMillis(then); 722 Date thenDate = thenCal.getTime(); 723 Calendar nowCal = new GregorianCalendar(); 724 nowCal.setTimeInMillis(now); 725 726 java.text.DateFormat f; 727 728 if (thenCal.get(Calendar.YEAR) == nowCal.get(Calendar.YEAR) 729 && thenCal.get(Calendar.MONTH) == nowCal.get(Calendar.MONTH) 730 && thenCal.get(Calendar.DAY_OF_MONTH) == nowCal.get(Calendar.DAY_OF_MONTH)) { 731 f = java.text.DateFormat.getTimeInstance(timeStyle); 732 } else { 733 f = java.text.DateFormat.getDateInstance(dateStyle); 734 } 735 return f.format(thenDate); 736 } 737 738 /** 739 * @hide 740 * @deprecated use {@link android.text.format.Time} 741 */ 742 public static Calendar newCalendar(boolean zulu) 743 { 744 if (zulu) 745 return Calendar.getInstance(TimeZone.getTimeZone("GMT")); 746 747 return Calendar.getInstance(); 748 } 749 750 /** 751 * @return true if the supplied when is today else false 752 */ 753 public static boolean isToday(long when) { 754 Time time = new Time(); 755 time.set(when); 756 757 int thenYear = time.year; 758 int thenMonth = time.month; 759 int thenMonthDay = time.monthDay; 760 761 time.set(System.currentTimeMillis()); 762 return (thenYear == time.year) 763 && (thenMonth == time.month) 764 && (thenMonthDay == time.monthDay); 765 } 766 767 /** 768 * @hide 769 * @deprecated use {@link android.text.format.Time} 770 */ 771 private static final int ctoi(String str, int index) 772 throws DateException 773 { 774 char c = str.charAt(index); 775 if (c >= '0' && c <= '9') { 776 return (int)(c - '0'); 777 } 778 throw new DateException("Expected numeric character. Got '" + 779 c + "'"); 780 } 781 782 /** 783 * @hide 784 * @deprecated use {@link android.text.format.Time} 785 */ 786 private static final int check(int lowerBound, int upperBound, int value) 787 throws DateException 788 { 789 if (value >= lowerBound && value <= upperBound) { 790 return value; 791 } 792 throw new DateException("field out of bounds. max=" + upperBound 793 + " value=" + value); 794 } 795 796 /** 797 * @hide 798 * @deprecated use {@link android.text.format.Time} 799 * Return true if this date string is local time 800 */ 801 public static boolean isUTC(String s) 802 { 803 if (s.length() == 16 && s.charAt(15) == 'Z') { 804 return true; 805 } 806 if (s.length() == 9 && s.charAt(8) == 'Z') { 807 // XXX not sure if this case possible/valid 808 return true; 809 } 810 return false; 811 } 812 813 814 // note that month in Calendar is 0 based and in all other human 815 // representations, it's 1 based. 816 // Returns if the Z was present, meaning that the time is in UTC 817 /** 818 * @hide 819 * @deprecated use {@link android.text.format.Time} 820 */ 821 public static boolean parseDateTime(String str, Calendar cal) 822 throws DateException 823 { 824 int len = str.length(); 825 boolean dateTime = (len == 15 || len == 16) && str.charAt(8) == 'T'; 826 boolean justDate = len == 8; 827 if (dateTime || justDate) { 828 cal.clear(); 829 cal.set(Calendar.YEAR, 830 ctoi(str, 0)*1000 + ctoi(str, 1)*100 831 + ctoi(str, 2)*10 + ctoi(str, 3)); 832 cal.set(Calendar.MONTH, 833 check(0, 11, ctoi(str, 4)*10 + ctoi(str, 5) - 1)); 834 cal.set(Calendar.DAY_OF_MONTH, 835 check(1, 31, ctoi(str, 6)*10 + ctoi(str, 7))); 836 if (dateTime) { 837 cal.set(Calendar.HOUR_OF_DAY, 838 check(0, 23, ctoi(str, 9)*10 + ctoi(str, 10))); 839 cal.set(Calendar.MINUTE, 840 check(0, 59, ctoi(str, 11)*10 + ctoi(str, 12))); 841 cal.set(Calendar.SECOND, 842 check(0, 59, ctoi(str, 13)*10 + ctoi(str, 14))); 843 } 844 if (justDate) { 845 cal.set(Calendar.HOUR_OF_DAY, 0); 846 cal.set(Calendar.MINUTE, 0); 847 cal.set(Calendar.SECOND, 0); 848 return true; 849 } 850 if (len == 15) { 851 return false; 852 } 853 if (str.charAt(15) == 'Z') { 854 return true; 855 } 856 } 857 throw new DateException("Invalid time (expected " 858 + "YYYYMMDDThhmmssZ? got '" + str + "')."); 859 } 860 861 /** 862 * Given a timezone string which can be null, and a dateTime string, 863 * set that time into a calendar. 864 * @hide 865 * @deprecated use {@link android.text.format.Time} 866 */ 867 public static void parseDateTime(String tz, String dateTime, Calendar out) 868 throws DateException 869 { 870 TimeZone timezone; 871 if (DateUtils.isUTC(dateTime)) { 872 timezone = TimeZone.getTimeZone("UTC"); 873 } 874 else if (tz == null) { 875 timezone = TimeZone.getDefault(); 876 } 877 else { 878 timezone = TimeZone.getTimeZone(tz); 879 } 880 881 Calendar local = new GregorianCalendar(timezone); 882 DateUtils.parseDateTime(dateTime, local); 883 884 out.setTimeInMillis(local.getTimeInMillis()); 885 } 886 887 888 /** 889 * Return a string containing the date and time in RFC2445 format. 890 * Ensures that the time is written in UTC. The Calendar class doesn't 891 * really help out with this, so this is slower than it ought to be. 892 * 893 * @param cal the date and time to write 894 * @hide 895 * @deprecated use {@link android.text.format.Time} 896 */ 897 public static String writeDateTime(Calendar cal) 898 { 899 TimeZone tz = TimeZone.getTimeZone("GMT"); 900 GregorianCalendar c = new GregorianCalendar(tz); 901 c.setTimeInMillis(cal.getTimeInMillis()); 902 return writeDateTime(c, true); 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 zulu If the calendar is in UTC, pass true, and a Z will 910 * be written at the end as per RFC2445. Otherwise, the time is 911 * considered in localtime. 912 * @hide 913 * @deprecated use {@link android.text.format.Time} 914 */ 915 public static String writeDateTime(Calendar cal, boolean zulu) 916 { 917 StringBuilder sb = new StringBuilder(); 918 sb.ensureCapacity(16); 919 if (zulu) { 920 sb.setLength(16); 921 sb.setCharAt(15, 'Z'); 922 } else { 923 sb.setLength(15); 924 } 925 return writeDateTime(cal, sb); 926 } 927 928 /** 929 * Return a string containing the date and time in RFC2445 format. 930 * 931 * @param cal the date and time to write 932 * @param sb a StringBuilder to use. It is assumed that setLength 933 * has already been called on sb to the appropriate length 934 * which is sb.setLength(zulu ? 16 : 15) 935 * @hide 936 * @deprecated use {@link android.text.format.Time} 937 */ 938 public static String writeDateTime(Calendar cal, StringBuilder sb) 939 { 940 int n; 941 942 n = cal.get(Calendar.YEAR); 943 sb.setCharAt(3, (char)('0'+n%10)); 944 n /= 10; 945 sb.setCharAt(2, (char)('0'+n%10)); 946 n /= 10; 947 sb.setCharAt(1, (char)('0'+n%10)); 948 n /= 10; 949 sb.setCharAt(0, (char)('0'+n%10)); 950 951 n = cal.get(Calendar.MONTH) + 1; 952 sb.setCharAt(5, (char)('0'+n%10)); 953 n /= 10; 954 sb.setCharAt(4, (char)('0'+n%10)); 955 956 n = cal.get(Calendar.DAY_OF_MONTH); 957 sb.setCharAt(7, (char)('0'+n%10)); 958 n /= 10; 959 sb.setCharAt(6, (char)('0'+n%10)); 960 961 sb.setCharAt(8, 'T'); 962 963 n = cal.get(Calendar.HOUR_OF_DAY); 964 sb.setCharAt(10, (char)('0'+n%10)); 965 n /= 10; 966 sb.setCharAt(9, (char)('0'+n%10)); 967 968 n = cal.get(Calendar.MINUTE); 969 sb.setCharAt(12, (char)('0'+n%10)); 970 n /= 10; 971 sb.setCharAt(11, (char)('0'+n%10)); 972 973 n = cal.get(Calendar.SECOND); 974 sb.setCharAt(14, (char)('0'+n%10)); 975 n /= 10; 976 sb.setCharAt(13, (char)('0'+n%10)); 977 978 return sb.toString(); 979 } 980 981 /** 982 * @hide 983 * @deprecated use {@link android.text.format.Time} 984 */ 985 public static void assign(Calendar lval, Calendar rval) 986 { 987 // there should be a faster way. 988 lval.clear(); 989 lval.setTimeInMillis(rval.getTimeInMillis()); 990 } 991 992 /** 993 * Formats a date or a time range according to the local conventions. 994 * 995 * <p> 996 * Example output strings (date formats in these examples are shown using 997 * the US date format convention but that may change depending on the 998 * local settings): 999 * <ul> 1000 * <li>10:15am</li> 1001 * <li>3:00pm - 4:00pm</li> 1002 * <li>3pm - 4pm</li> 1003 * <li>3PM - 4PM</li> 1004 * <li>08:00 - 17:00</li> 1005 * <li>Oct 9</li> 1006 * <li>Tue, Oct 9</li> 1007 * <li>October 9, 2007</li> 1008 * <li>Oct 9 - 10</li> 1009 * <li>Oct 9 - 10, 2007</li> 1010 * <li>Oct 28 - Nov 3, 2007</li> 1011 * <li>Dec 31, 2007 - Jan 1, 2008</li> 1012 * <li>Oct 9, 8:00am - Oct 10, 5:00pm</li> 1013 * <li>12/31/2007 - 01/01/2008</li> 1014 * </ul> 1015 * 1016 * <p> 1017 * The flags argument is a bitmask of options from the following list: 1018 * 1019 * <ul> 1020 * <li>FORMAT_SHOW_TIME</li> 1021 * <li>FORMAT_SHOW_WEEKDAY</li> 1022 * <li>FORMAT_SHOW_YEAR</li> 1023 * <li>FORMAT_NO_YEAR</li> 1024 * <li>FORMAT_SHOW_DATE</li> 1025 * <li>FORMAT_NO_MONTH_DAY</li> 1026 * <li>FORMAT_12HOUR</li> 1027 * <li>FORMAT_24HOUR</li> 1028 * <li>FORMAT_CAP_AMPM</li> 1029 * <li>FORMAT_NO_NOON</li> 1030 * <li>FORMAT_CAP_NOON</li> 1031 * <li>FORMAT_NO_MIDNIGHT</li> 1032 * <li>FORMAT_CAP_MIDNIGHT</li> 1033 * <li>FORMAT_UTC</li> 1034 * <li>FORMAT_ABBREV_TIME</li> 1035 * <li>FORMAT_ABBREV_WEEKDAY</li> 1036 * <li>FORMAT_ABBREV_MONTH</li> 1037 * <li>FORMAT_ABBREV_ALL</li> 1038 * <li>FORMAT_NUMERIC_DATE</li> 1039 * </ul> 1040 * 1041 * <p> 1042 * If FORMAT_SHOW_TIME is set, the time is shown as part of the date range. 1043 * If the start and end time are the same, then just the start time is 1044 * shown. 1045 * 1046 * <p> 1047 * If FORMAT_SHOW_WEEKDAY is set, then the weekday is shown. 1048 * 1049 * <p> 1050 * If FORMAT_SHOW_YEAR is set, then the year is always shown. 1051 * If FORMAT_NO_YEAR is set, then the year is not shown. 1052 * If neither FORMAT_SHOW_YEAR nor FORMAT_NO_YEAR are set, then the year 1053 * is shown only if it is different from the current year, or if the start 1054 * and end dates fall on different years. If both are set, 1055 * FORMAT_SHOW_YEAR takes precedence. 1056 * 1057 * <p> 1058 * Normally the date is shown unless the start and end day are the same. 1059 * If FORMAT_SHOW_DATE is set, then the date is always shown, even for 1060 * same day ranges. 1061 * 1062 * <p> 1063 * If FORMAT_NO_MONTH_DAY is set, then if the date is shown, just the 1064 * month name will be shown, not the day of the month. For example, 1065 * "January, 2008" instead of "January 6 - 12, 2008". 1066 * 1067 * <p> 1068 * If FORMAT_CAP_AMPM is set and 12-hour time is used, then the "AM" 1069 * and "PM" are capitalized. 1070 * 1071 * <p> 1072 * If FORMAT_NO_NOON is set and 12-hour time is used, then "12pm" is 1073 * shown instead of "noon". 1074 * 1075 * <p> 1076 * If FORMAT_CAP_NOON is set and 12-hour time is used, then "Noon" is 1077 * shown instead of "noon". 1078 * 1079 * <p> 1080 * If FORMAT_NO_MIDNIGHT is set and 12-hour time is used, then "12am" is 1081 * shown instead of "midnight". 1082 * 1083 * <p> 1084 * If FORMAT_CAP_NOON is set and 12-hour time is used, then "Midnight" is 1085 * shown instead of "midnight". 1086 * 1087 * <p> 1088 * If FORMAT_12HOUR is set and the time is shown, then the time is 1089 * shown in the 12-hour time format. You should not normally set this. 1090 * Instead, let the time format be chosen automatically according to the 1091 * system settings. If both FORMAT_12HOUR and FORMAT_24HOUR are set, then 1092 * FORMAT_24HOUR takes precedence. 1093 * 1094 * <p> 1095 * If FORMAT_24HOUR is set and the time is shown, then the time is 1096 * shown in the 24-hour time format. You should not normally set this. 1097 * Instead, let the time format be chosen automatically according to the 1098 * system settings. If both FORMAT_12HOUR and FORMAT_24HOUR are set, then 1099 * FORMAT_24HOUR takes precedence. 1100 * 1101 * <p> 1102 * If FORMAT_UTC is set, then the UTC timezone is used for the start 1103 * and end milliseconds. 1104 * 1105 * <p> 1106 * If FORMAT_ABBREV_TIME is set and 12-hour time format is used, then the 1107 * start and end times (if shown) are abbreviated by not showing the minutes 1108 * if they are zero. For example, instead of "3:00pm" the time would be 1109 * abbreviated to "3pm". 1110 * 1111 * <p> 1112 * If FORMAT_ABBREV_WEEKDAY is set, then the weekday (if shown) is 1113 * abbreviated to a 3-letter string. 1114 * 1115 * <p> 1116 * If FORMAT_ABBREV_MONTH is set, then the month (if shown) is abbreviated 1117 * to a 3-letter string. 1118 * 1119 * <p> 1120 * If FORMAT_ABBREV_ALL is set, then the weekday and the month (if shown) 1121 * are abbreviated to 3-letter strings. 1122 * 1123 * <p> 1124 * If FORMAT_NUMERIC_DATE is set, then the date is shown in numeric format 1125 * instead of using the name of the month. For example, "12/31/2008" 1126 * instead of "December 31, 2008". 1127 * 1128 * @param context the context is required only if the time is shown 1129 * @param startMillis the start time in UTC milliseconds 1130 * @param endMillis the end time in UTC milliseconds 1131 * @param flags a bit mask of options 1132 * 1133 * @return a string containing the formatted date/time range. 1134 */ 1135 public static String formatDateRange(Context context, long startMillis, 1136 long endMillis, int flags) { 1137 Resources res = Resources.getSystem(); 1138 boolean showTime = (flags & FORMAT_SHOW_TIME) != 0; 1139 boolean showWeekDay = (flags & FORMAT_SHOW_WEEKDAY) != 0; 1140 boolean showYear = (flags & FORMAT_SHOW_YEAR) != 0; 1141 boolean noYear = (flags & FORMAT_NO_YEAR) != 0; 1142 boolean useUTC = (flags & FORMAT_UTC) != 0; 1143 boolean abbrevWeekDay = (flags & (FORMAT_ABBREV_WEEKDAY | FORMAT_ABBREV_ALL)) != 0; 1144 boolean abbrevMonth = (flags & (FORMAT_ABBREV_MONTH | FORMAT_ABBREV_ALL)) != 0; 1145 boolean noMonthDay = (flags & FORMAT_NO_MONTH_DAY) != 0; 1146 boolean numericDate = (flags & FORMAT_NUMERIC_DATE) != 0; 1147 1148 // If we're getting called with a single instant in time (from 1149 // e.g. formatDateTime(), below), then we can skip a lot of 1150 // computation below that'd otherwise be thrown out. 1151 boolean isInstant = (startMillis == endMillis); 1152 1153 Time startDate = useUTC ? new Time(Time.TIMEZONE_UTC) : new Time(); 1154 startDate.set(startMillis); 1155 1156 Time endDate; 1157 int dayDistance; 1158 if (isInstant) { 1159 endDate = startDate; 1160 dayDistance = 0; 1161 } else { 1162 endDate = useUTC ? new Time(Time.TIMEZONE_UTC) : new Time(); 1163 endDate.set(endMillis); 1164 int startJulianDay = Time.getJulianDay(startMillis, startDate.gmtoff); 1165 int endJulianDay = Time.getJulianDay(endMillis, endDate.gmtoff); 1166 dayDistance = endJulianDay - startJulianDay; 1167 } 1168 1169 // If the end date ends at 12am at the beginning of a day, 1170 // then modify it to make it look like it ends at midnight on 1171 // the previous day. This will allow us to display "8pm - midnight", 1172 // for example, instead of "Nov 10, 8pm - Nov 11, 12am". But we only do 1173 // this if it is midnight of the same day as the start date because 1174 // for multiple-day events, an end time of "midnight on Nov 11" is 1175 // ambiguous and confusing (is that midnight the start of Nov 11, or 1176 // the end of Nov 11?). 1177 // If we are not showing the time then also adjust the end date 1178 // for multiple-day events. This is to allow us to display, for 1179 // example, "Nov 10 -11" for an event with a start date of Nov 10 1180 // and an end date of Nov 12 at 00:00. 1181 // If the start and end time are the same, then skip this and don't 1182 // adjust the date. 1183 if (!isInstant 1184 && (endDate.hour | endDate.minute | endDate.second) == 0 1185 && (!showTime || dayDistance <= 1)) { 1186 endDate.monthDay -= 1; 1187 endDate.normalize(true /* ignore isDst */); 1188 } 1189 1190 int startDay = startDate.monthDay; 1191 int startMonthNum = startDate.month; 1192 int startYear = startDate.year; 1193 1194 int endDay = endDate.monthDay; 1195 int endMonthNum = endDate.month; 1196 int endYear = endDate.year; 1197 1198 String startWeekDayString = ""; 1199 String endWeekDayString = ""; 1200 if (showWeekDay) { 1201 String weekDayFormat = ""; 1202 if (abbrevWeekDay) { 1203 weekDayFormat = ABBREV_WEEKDAY_FORMAT; 1204 } else { 1205 weekDayFormat = WEEKDAY_FORMAT; 1206 } 1207 startWeekDayString = startDate.format(weekDayFormat); 1208 endWeekDayString = isInstant ? startWeekDayString : endDate.format(weekDayFormat); 1209 } 1210 1211 String startTimeString = ""; 1212 String endTimeString = ""; 1213 if (showTime) { 1214 String startTimeFormat = ""; 1215 String endTimeFormat = ""; 1216 boolean force24Hour = (flags & FORMAT_24HOUR) != 0; 1217 boolean force12Hour = (flags & FORMAT_12HOUR) != 0; 1218 boolean use24Hour; 1219 if (force24Hour) { 1220 use24Hour = true; 1221 } else if (force12Hour) { 1222 use24Hour = false; 1223 } else { 1224 use24Hour = DateFormat.is24HourFormat(context); 1225 } 1226 if (use24Hour) { 1227 startTimeFormat = HOUR_MINUTE_24; 1228 endTimeFormat = HOUR_MINUTE_24; 1229 } else { 1230 boolean abbrevTime = (flags & (FORMAT_ABBREV_TIME | FORMAT_ABBREV_ALL)) != 0; 1231 boolean capAMPM = (flags & FORMAT_CAP_AMPM) != 0; 1232 boolean noNoon = (flags & FORMAT_NO_NOON) != 0; 1233 boolean capNoon = (flags & FORMAT_CAP_NOON) != 0; 1234 boolean noMidnight = (flags & FORMAT_NO_MIDNIGHT) != 0; 1235 boolean capMidnight = (flags & FORMAT_CAP_MIDNIGHT) != 0; 1236 1237 boolean startOnTheHour = startDate.minute == 0 && startDate.second == 0; 1238 boolean endOnTheHour = endDate.minute == 0 && endDate.second == 0; 1239 if (abbrevTime && startOnTheHour) { 1240 if (capAMPM) { 1241 startTimeFormat = res.getString(com.android.internal.R.string.hour_cap_ampm); 1242 } else { 1243 startTimeFormat = res.getString(com.android.internal.R.string.hour_ampm); 1244 } 1245 } else { 1246 if (capAMPM) { 1247 startTimeFormat = res.getString(com.android.internal.R.string.hour_minute_cap_ampm); 1248 } else { 1249 startTimeFormat = res.getString(com.android.internal.R.string.hour_minute_ampm); 1250 } 1251 } 1252 1253 // Don't waste time on setting endTimeFormat when 1254 // we're dealing with an instant, where we'll never 1255 // need the end point. (It's the same as the start 1256 // point) 1257 if (!isInstant) { 1258 if (abbrevTime && endOnTheHour) { 1259 if (capAMPM) { 1260 endTimeFormat = res.getString(com.android.internal.R.string.hour_cap_ampm); 1261 } else { 1262 endTimeFormat = res.getString(com.android.internal.R.string.hour_ampm); 1263 } 1264 } else { 1265 if (capAMPM) { 1266 endTimeFormat = res.getString(com.android.internal.R.string.hour_minute_cap_ampm); 1267 } else { 1268 endTimeFormat = res.getString(com.android.internal.R.string.hour_minute_ampm); 1269 } 1270 } 1271 1272 if (endDate.hour == 12 && endOnTheHour && !noNoon) { 1273 if (capNoon) { 1274 endTimeFormat = res.getString(com.android.internal.R.string.Noon); 1275 } else { 1276 endTimeFormat = res.getString(com.android.internal.R.string.noon); 1277 } 1278 } else if (endDate.hour == 0 && endOnTheHour && !noMidnight) { 1279 if (capMidnight) { 1280 endTimeFormat = res.getString(com.android.internal.R.string.Midnight); 1281 } else { 1282 endTimeFormat = res.getString(com.android.internal.R.string.midnight); 1283 } 1284 } 1285 } 1286 1287 if (startDate.hour == 12 && startOnTheHour && !noNoon) { 1288 if (capNoon) { 1289 startTimeFormat = res.getString(com.android.internal.R.string.Noon); 1290 } else { 1291 startTimeFormat = res.getString(com.android.internal.R.string.noon); 1292 } 1293 // Don't show the start time starting at midnight. Show 1294 // 12am instead. 1295 } 1296 } 1297 1298 startTimeString = startDate.format(startTimeFormat); 1299 endTimeString = isInstant ? startTimeString : endDate.format(endTimeFormat); 1300 } 1301 1302 // Show the year if the user specified FORMAT_SHOW_YEAR or if 1303 // the starting and end years are different from each other 1304 // or from the current year. But don't show the year if the 1305 // user specified FORMAT_NO_YEAR. 1306 if (showYear) { 1307 // No code... just a comment for clarity. Keep showYear 1308 // on, as they enabled it with FORMAT_SHOW_YEAR. This 1309 // takes precedence over them setting FORMAT_NO_YEAR. 1310 } else if (noYear) { 1311 // They explicitly didn't want a year. 1312 showYear = false; 1313 } else if (startYear != endYear) { 1314 showYear = true; 1315 } else { 1316 // Show the year if it's not equal to the current year. 1317 Time currentTime = new Time(); 1318 currentTime.setToNow(); 1319 showYear = startYear != currentTime.year; 1320 } 1321 1322 String defaultDateFormat, fullFormat, dateRange; 1323 if (numericDate) { 1324 defaultDateFormat = res.getString(com.android.internal.R.string.numeric_date); 1325 } else if (showYear) { 1326 if (abbrevMonth) { 1327 if (noMonthDay) { 1328 defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month_year); 1329 } else { 1330 defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month_day_year); 1331 } 1332 } else { 1333 if (noMonthDay) { 1334 defaultDateFormat = res.getString(com.android.internal.R.string.month_year); 1335 } else { 1336 defaultDateFormat = res.getString(com.android.internal.R.string.month_day_year); 1337 } 1338 } 1339 } else { 1340 if (abbrevMonth) { 1341 if (noMonthDay) { 1342 defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month); 1343 } else { 1344 defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month_day); 1345 } 1346 } else { 1347 if (noMonthDay) { 1348 defaultDateFormat = res.getString(com.android.internal.R.string.month); 1349 } else { 1350 defaultDateFormat = res.getString(com.android.internal.R.string.month_day); 1351 } 1352 } 1353 } 1354 1355 if (showWeekDay) { 1356 if (showTime) { 1357 fullFormat = res.getString(com.android.internal.R.string.wday1_date1_time1_wday2_date2_time2); 1358 } else { 1359 fullFormat = res.getString(com.android.internal.R.string.wday1_date1_wday2_date2); 1360 } 1361 } else { 1362 if (showTime) { 1363 fullFormat = res.getString(com.android.internal.R.string.date1_time1_date2_time2); 1364 } else { 1365 fullFormat = res.getString(com.android.internal.R.string.date1_date2); 1366 } 1367 } 1368 1369 if (noMonthDay && startMonthNum == endMonthNum) { 1370 // Example: "January, 2008" 1371 String startDateString = startDate.format(defaultDateFormat); 1372 return startDateString; 1373 } 1374 1375 if (startYear != endYear || noMonthDay) { 1376 // Different year or we are not showing the month day number. 1377 // Example: "December 31, 2007 - January 1, 2008" 1378 // Or: "January - February, 2008" 1379 String startDateString = startDate.format(defaultDateFormat); 1380 String endDateString = endDate.format(defaultDateFormat); 1381 1382 // The values that are used in a fullFormat string are specified 1383 // by position. 1384 dateRange = String.format(fullFormat, 1385 startWeekDayString, startDateString, startTimeString, 1386 endWeekDayString, endDateString, endTimeString); 1387 return dateRange; 1388 } 1389 1390 // Get the month, day, and year strings for the start and end dates 1391 String monthFormat; 1392 if (numericDate) { 1393 monthFormat = NUMERIC_MONTH_FORMAT; 1394 } else if (abbrevMonth) { 1395 monthFormat = ABBREV_MONTH_FORMAT; 1396 } else { 1397 monthFormat = MONTH_FORMAT; 1398 } 1399 String startMonthString = startDate.format(monthFormat); 1400 String startMonthDayString = startDate.format(MONTH_DAY_FORMAT); 1401 String startYearString = startDate.format(YEAR_FORMAT); 1402 1403 String endMonthString = isInstant ? null : endDate.format(monthFormat); 1404 String endMonthDayString = isInstant ? null : endDate.format(MONTH_DAY_FORMAT); 1405 String endYearString = isInstant ? null : endDate.format(YEAR_FORMAT); 1406 1407 if (startMonthNum != endMonthNum) { 1408 // Same year, different month. 1409 // Example: "October 28 - November 3" 1410 // or: "Wed, Oct 31 - Sat, Nov 3, 2007" 1411 // or: "Oct 31, 8am - Sat, Nov 3, 2007, 5pm" 1412 1413 int index = 0; 1414 if (showWeekDay) index = 1; 1415 if (showYear) index += 2; 1416 if (showTime) index += 4; 1417 if (numericDate) index += 8; 1418 int resId = sameYearTable[index]; 1419 fullFormat = res.getString(resId); 1420 1421 // The values that are used in a fullFormat string are specified 1422 // by position. 1423 dateRange = String.format(fullFormat, 1424 startWeekDayString, startMonthString, startMonthDayString, 1425 startYearString, startTimeString, 1426 endWeekDayString, endMonthString, endMonthDayString, 1427 endYearString, endTimeString); 1428 return dateRange; 1429 } 1430 1431 if (startDay != endDay) { 1432 // Same month, different day. 1433 int index = 0; 1434 if (showWeekDay) index = 1; 1435 if (showYear) index += 2; 1436 if (showTime) index += 4; 1437 if (numericDate) index += 8; 1438 int resId = sameMonthTable[index]; 1439 fullFormat = res.getString(resId); 1440 1441 // The values that are used in a fullFormat string are specified 1442 // by position. 1443 dateRange = String.format(fullFormat, 1444 startWeekDayString, startMonthString, startMonthDayString, 1445 startYearString, startTimeString, 1446 endWeekDayString, endMonthString, endMonthDayString, 1447 endYearString, endTimeString); 1448 return dateRange; 1449 } 1450 1451 // Same start and end day 1452 boolean showDate = (flags & FORMAT_SHOW_DATE) != 0; 1453 1454 // If nothing was specified, then show the date. 1455 if (!showTime && !showDate && !showWeekDay) showDate = true; 1456 1457 // Compute the time string (example: "10:00 - 11:00 am") 1458 String timeString = ""; 1459 if (showTime) { 1460 // If the start and end time are the same, then just show the 1461 // start time. 1462 if (isInstant) { 1463 // Same start and end time. 1464 // Example: "10:15 AM" 1465 timeString = startTimeString; 1466 } else { 1467 // Example: "10:00 - 11:00 am" 1468 String timeFormat = res.getString(com.android.internal.R.string.time1_time2); 1469 timeString = String.format(timeFormat, startTimeString, endTimeString); 1470 } 1471 } 1472 1473 // Figure out which full format to use. 1474 fullFormat = ""; 1475 String dateString = ""; 1476 if (showDate) { 1477 dateString = startDate.format(defaultDateFormat); 1478 if (showWeekDay) { 1479 if (showTime) { 1480 // Example: "10:00 - 11:00 am, Tue, Oct 9" 1481 fullFormat = res.getString(com.android.internal.R.string.time_wday_date); 1482 } else { 1483 // Example: "Tue, Oct 9" 1484 fullFormat = res.getString(com.android.internal.R.string.wday_date); 1485 } 1486 } else { 1487 if (showTime) { 1488 // Example: "10:00 - 11:00 am, Oct 9" 1489 fullFormat = res.getString(com.android.internal.R.string.time_date); 1490 } else { 1491 // Example: "Oct 9" 1492 return dateString; 1493 } 1494 } 1495 } else if (showWeekDay) { 1496 if (showTime) { 1497 // Example: "10:00 - 11:00 am, Tue" 1498 fullFormat = res.getString(com.android.internal.R.string.time_wday); 1499 } else { 1500 // Example: "Tue" 1501 return startWeekDayString; 1502 } 1503 } else if (showTime) { 1504 return timeString; 1505 } 1506 1507 // The values that are used in a fullFormat string are specified 1508 // by position. 1509 dateRange = String.format(fullFormat, timeString, startWeekDayString, dateString); 1510 return dateRange; 1511 } 1512 1513 /** 1514 * Formats a date or a time according to the local conventions. There are 1515 * lots of options that allow the caller to control, for example, if the 1516 * time is shown, if the day of the week is shown, if the month name is 1517 * abbreviated, if noon is shown instead of 12pm, and so on. For the 1518 * complete list of options, see the documentation for 1519 * {@link #formatDateRange}. 1520 * <p> 1521 * Example output strings (date formats in these examples are shown using 1522 * the US date format convention but that may change depending on the 1523 * local settings): 1524 * <ul> 1525 * <li>10:15am</li> 1526 * <li>3:00pm</li> 1527 * <li>3pm</li> 1528 * <li>3PM</li> 1529 * <li>08:00</li> 1530 * <li>17:00</li> 1531 * <li>noon</li> 1532 * <li>Noon</li> 1533 * <li>midnight</li> 1534 * <li>Midnight</li> 1535 * <li>Oct 31</li> 1536 * <li>Oct 31, 2007</li> 1537 * <li>October 31, 2007</li> 1538 * <li>10am, Oct 31</li> 1539 * <li>17:00, Oct 31</li> 1540 * <li>Wed</li> 1541 * <li>Wednesday</li> 1542 * <li>10am, Wed, Oct 31</li> 1543 * <li>Wed, Oct 31</li> 1544 * <li>Wednesday, Oct 31</li> 1545 * <li>Wed, Oct 31, 2007</li> 1546 * <li>Wed, October 31</li> 1547 * <li>10/31/2007</li> 1548 * </ul> 1549 * 1550 * @param context the context is required only if the time is shown 1551 * @param millis a point in time in UTC milliseconds 1552 * @param flags a bit mask of formatting options 1553 * @return a string containing the formatted date/time. 1554 */ 1555 public static String formatDateTime(Context context, long millis, int flags) { 1556 return formatDateRange(context, millis, millis, flags); 1557 } 1558 1559 /** 1560 * @return a relative time string to display the time expressed by millis. Times 1561 * are counted starting at midnight, which means that assuming that the current 1562 * time is March 31st, 0:30: 1563 * <ul> 1564 * <li>"millis=0:10 today" will be displayed as "0:10"</li> 1565 * <li>"millis=11:30pm the day before" will be displayed as "Mar 30"</li> 1566 * </ul> 1567 * If the given millis is in a different year, then the full date is 1568 * returned in numeric format (e.g., "10/12/2008"). 1569 * 1570 * @param withPreposition If true, the string returned will include the correct 1571 * preposition ("at 9:20am", "on 10/12/2008" or "on May 29"). 1572 */ 1573 public static CharSequence getRelativeTimeSpanString(Context c, long millis, 1574 boolean withPreposition) { 1575 1576 long now = System.currentTimeMillis(); 1577 long span = now - millis; 1578 1579 if (sNowTime == null) { 1580 sNowTime = new Time(); 1581 sThenTime = new Time(); 1582 } 1583 1584 sNowTime.set(now); 1585 sThenTime.set(millis); 1586 1587 String result; 1588 int prepositionId; 1589 if (span < DAY_IN_MILLIS && sNowTime.weekDay == sThenTime.weekDay) { 1590 // Same day 1591 int flags = FORMAT_SHOW_TIME; 1592 result = formatDateRange(c, millis, millis, flags); 1593 prepositionId = R.string.preposition_for_time; 1594 } else if (sNowTime.year != sThenTime.year) { 1595 // Different years 1596 int flags = FORMAT_SHOW_DATE | FORMAT_SHOW_YEAR | FORMAT_NUMERIC_DATE; 1597 result = formatDateRange(c, millis, millis, flags); 1598 1599 // This is a date (like "10/31/2008" so use the date preposition) 1600 prepositionId = R.string.preposition_for_date; 1601 } else { 1602 // Default 1603 int flags = FORMAT_SHOW_DATE | FORMAT_ABBREV_MONTH; 1604 result = formatDateRange(c, millis, millis, flags); 1605 prepositionId = R.string.preposition_for_date; 1606 } 1607 if (withPreposition) { 1608 Resources res = c.getResources(); 1609 result = res.getString(prepositionId, result); 1610 } 1611 return result; 1612 } 1613 1614 /** 1615 * Convenience function to return relative time string without preposition. 1616 * @param c context for resources 1617 * @param millis time in milliseconds 1618 * @return {@link CharSequence} containing relative time. 1619 * @see #getRelativeTimeSpanString(Context, long, boolean) 1620 */ 1621 public static CharSequence getRelativeTimeSpanString(Context c, long millis) { 1622 return getRelativeTimeSpanString(c, millis, false /* no preposition */); 1623 } 1624 1625 private static Time sNowTime; 1626 private static Time sThenTime; 1627} 1628