DateUtils.java revision a53bbe4033f1e9fc4c371d51ba1ef58588f867eb
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; 24 25import java.util.Calendar; 26import java.util.Date; 27import java.util.Formatter; 28import java.util.GregorianCalendar; 29import java.util.Locale; 30import java.util.TimeZone; 31 32/** 33 * This class contains various date-related utilities for creating text for things like 34 * elapsed time and date ranges, strings for days of the week and months, and AM/PM text etc. 35 */ 36public class DateUtils 37{ 38 private static final Object sLock = new Object(); 39 private static final int[] sDaysLong = new int[] { 40 com.android.internal.R.string.day_of_week_long_sunday, 41 com.android.internal.R.string.day_of_week_long_monday, 42 com.android.internal.R.string.day_of_week_long_tuesday, 43 com.android.internal.R.string.day_of_week_long_wednesday, 44 com.android.internal.R.string.day_of_week_long_thursday, 45 com.android.internal.R.string.day_of_week_long_friday, 46 com.android.internal.R.string.day_of_week_long_saturday, 47 }; 48 private static final int[] sDaysMedium = new int[] { 49 com.android.internal.R.string.day_of_week_medium_sunday, 50 com.android.internal.R.string.day_of_week_medium_monday, 51 com.android.internal.R.string.day_of_week_medium_tuesday, 52 com.android.internal.R.string.day_of_week_medium_wednesday, 53 com.android.internal.R.string.day_of_week_medium_thursday, 54 com.android.internal.R.string.day_of_week_medium_friday, 55 com.android.internal.R.string.day_of_week_medium_saturday, 56 }; 57 private static final int[] sDaysShort = new int[] { 58 com.android.internal.R.string.day_of_week_short_sunday, 59 com.android.internal.R.string.day_of_week_short_monday, 60 com.android.internal.R.string.day_of_week_short_tuesday, 61 com.android.internal.R.string.day_of_week_short_wednesday, 62 com.android.internal.R.string.day_of_week_short_thursday, 63 com.android.internal.R.string.day_of_week_short_friday, 64 com.android.internal.R.string.day_of_week_short_saturday, 65 }; 66 private static final int[] sDaysShortest = new int[] { 67 com.android.internal.R.string.day_of_week_shortest_sunday, 68 com.android.internal.R.string.day_of_week_shortest_monday, 69 com.android.internal.R.string.day_of_week_shortest_tuesday, 70 com.android.internal.R.string.day_of_week_shortest_wednesday, 71 com.android.internal.R.string.day_of_week_shortest_thursday, 72 com.android.internal.R.string.day_of_week_shortest_friday, 73 com.android.internal.R.string.day_of_week_shortest_saturday, 74 }; 75 private static final int[] sMonthsStandaloneLong = new int [] { 76 com.android.internal.R.string.month_long_standalone_january, 77 com.android.internal.R.string.month_long_standalone_february, 78 com.android.internal.R.string.month_long_standalone_march, 79 com.android.internal.R.string.month_long_standalone_april, 80 com.android.internal.R.string.month_long_standalone_may, 81 com.android.internal.R.string.month_long_standalone_june, 82 com.android.internal.R.string.month_long_standalone_july, 83 com.android.internal.R.string.month_long_standalone_august, 84 com.android.internal.R.string.month_long_standalone_september, 85 com.android.internal.R.string.month_long_standalone_october, 86 com.android.internal.R.string.month_long_standalone_november, 87 com.android.internal.R.string.month_long_standalone_december, 88 }; 89 private static final int[] sMonthsLong = new int [] { 90 com.android.internal.R.string.month_long_january, 91 com.android.internal.R.string.month_long_february, 92 com.android.internal.R.string.month_long_march, 93 com.android.internal.R.string.month_long_april, 94 com.android.internal.R.string.month_long_may, 95 com.android.internal.R.string.month_long_june, 96 com.android.internal.R.string.month_long_july, 97 com.android.internal.R.string.month_long_august, 98 com.android.internal.R.string.month_long_september, 99 com.android.internal.R.string.month_long_october, 100 com.android.internal.R.string.month_long_november, 101 com.android.internal.R.string.month_long_december, 102 }; 103 private static final int[] sMonthsMedium = new int [] { 104 com.android.internal.R.string.month_medium_january, 105 com.android.internal.R.string.month_medium_february, 106 com.android.internal.R.string.month_medium_march, 107 com.android.internal.R.string.month_medium_april, 108 com.android.internal.R.string.month_medium_may, 109 com.android.internal.R.string.month_medium_june, 110 com.android.internal.R.string.month_medium_july, 111 com.android.internal.R.string.month_medium_august, 112 com.android.internal.R.string.month_medium_september, 113 com.android.internal.R.string.month_medium_october, 114 com.android.internal.R.string.month_medium_november, 115 com.android.internal.R.string.month_medium_december, 116 }; 117 private static final int[] sMonthsShortest = new int [] { 118 com.android.internal.R.string.month_shortest_january, 119 com.android.internal.R.string.month_shortest_february, 120 com.android.internal.R.string.month_shortest_march, 121 com.android.internal.R.string.month_shortest_april, 122 com.android.internal.R.string.month_shortest_may, 123 com.android.internal.R.string.month_shortest_june, 124 com.android.internal.R.string.month_shortest_july, 125 com.android.internal.R.string.month_shortest_august, 126 com.android.internal.R.string.month_shortest_september, 127 com.android.internal.R.string.month_shortest_october, 128 com.android.internal.R.string.month_shortest_november, 129 com.android.internal.R.string.month_shortest_december, 130 }; 131 private static final int[] sAmPm = new int[] { 132 com.android.internal.R.string.am, 133 com.android.internal.R.string.pm, 134 }; 135 private static Configuration sLastConfig; 136 private static java.text.DateFormat sStatusTimeFormat; 137 private static String sElapsedFormatMMSS; 138 private static String sElapsedFormatHMMSS; 139 140 private static final String FAST_FORMAT_HMMSS = "%1$d:%2$02d:%3$02d"; 141 private static final String FAST_FORMAT_MMSS = "%1$02d:%2$02d"; 142 private static final char TIME_PADDING = '0'; 143 private static final char TIME_SEPARATOR = ':'; 144 145 146 public static final long SECOND_IN_MILLIS = 1000; 147 public static final long MINUTE_IN_MILLIS = SECOND_IN_MILLIS * 60; 148 public static final long HOUR_IN_MILLIS = MINUTE_IN_MILLIS * 60; 149 public static final long DAY_IN_MILLIS = HOUR_IN_MILLIS * 24; 150 public static final long WEEK_IN_MILLIS = DAY_IN_MILLIS * 7; 151 /** 152 * This constant is actually the length of 364 days, not of a year! 153 */ 154 public static final long YEAR_IN_MILLIS = WEEK_IN_MILLIS * 52; 155 156 // The following FORMAT_* symbols are used for specifying the format of 157 // dates and times in the formatDateRange method. 158 public static final int FORMAT_SHOW_TIME = 0x00001; 159 public static final int FORMAT_SHOW_WEEKDAY = 0x00002; 160 public static final int FORMAT_SHOW_YEAR = 0x00004; 161 public static final int FORMAT_NO_YEAR = 0x00008; 162 public static final int FORMAT_SHOW_DATE = 0x00010; 163 public static final int FORMAT_NO_MONTH_DAY = 0x00020; 164 public static final int FORMAT_12HOUR = 0x00040; 165 public static final int FORMAT_24HOUR = 0x00080; 166 public static final int FORMAT_CAP_AMPM = 0x00100; 167 public static final int FORMAT_NO_NOON = 0x00200; 168 public static final int FORMAT_CAP_NOON = 0x00400; 169 public static final int FORMAT_NO_MIDNIGHT = 0x00800; 170 public static final int FORMAT_CAP_MIDNIGHT = 0x01000; 171 public static final int FORMAT_UTC = 0x02000; 172 public static final int FORMAT_ABBREV_TIME = 0x04000; 173 public static final int FORMAT_ABBREV_WEEKDAY = 0x08000; 174 public static final int FORMAT_ABBREV_MONTH = 0x10000; 175 public static final int FORMAT_NUMERIC_DATE = 0x20000; 176 public static final int FORMAT_ABBREV_RELATIVE = 0x40000; 177 public static final int FORMAT_ABBREV_ALL = 0x80000; 178 public static final int FORMAT_CAP_NOON_MIDNIGHT = (FORMAT_CAP_NOON | FORMAT_CAP_MIDNIGHT); 179 public static final int FORMAT_NO_NOON_MIDNIGHT = (FORMAT_NO_NOON | FORMAT_NO_MIDNIGHT); 180 181 // Date and time format strings that are constant and don't need to be 182 // translated. 183 /** 184 * This is not actually the preferred 24-hour date format in all locales. 185 */ 186 public static final String HOUR_MINUTE_24 = "%H:%M"; 187 public static final String MONTH_FORMAT = "%B"; 188 /** 189 * This is not actually a useful month name in all locales. 190 */ 191 public static final String ABBREV_MONTH_FORMAT = "%b"; 192 public static final String NUMERIC_MONTH_FORMAT = "%m"; 193 public static final String MONTH_DAY_FORMAT = "%-d"; 194 public static final String YEAR_FORMAT = "%Y"; 195 public static final String YEAR_FORMAT_TWO_DIGITS = "%g"; 196 public static final String WEEKDAY_FORMAT = "%A"; 197 public static final String ABBREV_WEEKDAY_FORMAT = "%a"; 198 199 // This table is used to lookup the resource string id of a format string 200 // used for formatting a start and end date that fall in the same year. 201 // The index is constructed from a bit-wise OR of the boolean values: 202 // {showTime, showYear, showWeekDay}. For example, if showYear and 203 // showWeekDay are both true, then the index would be 3. 204 public static final int sameYearTable[] = { 205 com.android.internal.R.string.same_year_md1_md2, 206 com.android.internal.R.string.same_year_wday1_md1_wday2_md2, 207 com.android.internal.R.string.same_year_mdy1_mdy2, 208 com.android.internal.R.string.same_year_wday1_mdy1_wday2_mdy2, 209 com.android.internal.R.string.same_year_md1_time1_md2_time2, 210 com.android.internal.R.string.same_year_wday1_md1_time1_wday2_md2_time2, 211 com.android.internal.R.string.same_year_mdy1_time1_mdy2_time2, 212 com.android.internal.R.string.same_year_wday1_mdy1_time1_wday2_mdy2_time2, 213 214 // Numeric date strings 215 com.android.internal.R.string.numeric_md1_md2, 216 com.android.internal.R.string.numeric_wday1_md1_wday2_md2, 217 com.android.internal.R.string.numeric_mdy1_mdy2, 218 com.android.internal.R.string.numeric_wday1_mdy1_wday2_mdy2, 219 com.android.internal.R.string.numeric_md1_time1_md2_time2, 220 com.android.internal.R.string.numeric_wday1_md1_time1_wday2_md2_time2, 221 com.android.internal.R.string.numeric_mdy1_time1_mdy2_time2, 222 com.android.internal.R.string.numeric_wday1_mdy1_time1_wday2_mdy2_time2, 223 }; 224 225 // This table is used to lookup the resource string id of a format string 226 // used for formatting a start and end date that fall in the same month. 227 // The index is constructed from a bit-wise OR of the boolean values: 228 // {showTime, showYear, showWeekDay}. For example, if showYear and 229 // showWeekDay are both true, then the index would be 3. 230 public static final int sameMonthTable[] = { 231 com.android.internal.R.string.same_month_md1_md2, 232 com.android.internal.R.string.same_month_wday1_md1_wday2_md2, 233 com.android.internal.R.string.same_month_mdy1_mdy2, 234 com.android.internal.R.string.same_month_wday1_mdy1_wday2_mdy2, 235 com.android.internal.R.string.same_month_md1_time1_md2_time2, 236 com.android.internal.R.string.same_month_wday1_md1_time1_wday2_md2_time2, 237 com.android.internal.R.string.same_month_mdy1_time1_mdy2_time2, 238 com.android.internal.R.string.same_month_wday1_mdy1_time1_wday2_mdy2_time2, 239 240 com.android.internal.R.string.numeric_md1_md2, 241 com.android.internal.R.string.numeric_wday1_md1_wday2_md2, 242 com.android.internal.R.string.numeric_mdy1_mdy2, 243 com.android.internal.R.string.numeric_wday1_mdy1_wday2_mdy2, 244 com.android.internal.R.string.numeric_md1_time1_md2_time2, 245 com.android.internal.R.string.numeric_wday1_md1_time1_wday2_md2_time2, 246 com.android.internal.R.string.numeric_mdy1_time1_mdy2_time2, 247 com.android.internal.R.string.numeric_wday1_mdy1_time1_wday2_mdy2_time2, 248 }; 249 250 /** 251 * Request the full spelled-out name. For use with the 'abbrev' parameter of 252 * {@link #getDayOfWeekString} and {@link #getMonthString}. 253 * 254 * @more <p> 255 * e.g. "Sunday" or "January" 256 */ 257 public static final int LENGTH_LONG = 10; 258 259 /** 260 * Request an abbreviated version of the name. For use with the 'abbrev' 261 * parameter of {@link #getDayOfWeekString} and {@link #getMonthString}. 262 * 263 * @more <p> 264 * e.g. "Sun" or "Jan" 265 */ 266 public static final int LENGTH_MEDIUM = 20; 267 268 /** 269 * Request a shorter abbreviated version of the name. 270 * For use with the 'abbrev' parameter of {@link #getDayOfWeekString} and {@link #getMonthString}. 271 * @more 272 * <p>e.g. "Su" or "Jan" 273 * <p>In most languages, the results returned for LENGTH_SHORT will be the same as 274 * the results returned for {@link #LENGTH_MEDIUM}. 275 */ 276 public static final int LENGTH_SHORT = 30; 277 278 /** 279 * Request an even shorter abbreviated version of the name. 280 * Do not use this. Currently this will always return the same result 281 * as {@link #LENGTH_SHORT}. 282 */ 283 public static final int LENGTH_SHORTER = 40; 284 285 /** 286 * Request an even shorter abbreviated version of the name. 287 * For use with the 'abbrev' parameter of {@link #getDayOfWeekString} and {@link #getMonthString}. 288 * @more 289 * <p>e.g. "S", "T", "T" or "J" 290 * <p>In some languages, the results returned for LENGTH_SHORTEST will be the same as 291 * the results returned for {@link #LENGTH_SHORT}. 292 */ 293 public static final int LENGTH_SHORTEST = 50; 294 295 /** 296 * Return a string for the day of the week. 297 * @param dayOfWeek One of {@link Calendar#SUNDAY Calendar.SUNDAY}, 298 * {@link Calendar#MONDAY Calendar.MONDAY}, etc. 299 * @param abbrev One of {@link #LENGTH_LONG}, {@link #LENGTH_SHORT}, 300 * {@link #LENGTH_MEDIUM}, or {@link #LENGTH_SHORTEST}. 301 * Note that in most languages, {@link #LENGTH_SHORT} 302 * will return the same as {@link #LENGTH_MEDIUM}. 303 * Undefined lengths will return {@link #LENGTH_MEDIUM} 304 * but may return something different in the future. 305 * @throws IndexOutOfBoundsException if the dayOfWeek is out of bounds. 306 */ 307 public static String getDayOfWeekString(int dayOfWeek, int abbrev) { 308 int[] list; 309 switch (abbrev) { 310 case LENGTH_LONG: list = sDaysLong; break; 311 case LENGTH_MEDIUM: list = sDaysMedium; break; 312 case LENGTH_SHORT: list = sDaysShort; break; 313 case LENGTH_SHORTER: list = sDaysShort; break; 314 case LENGTH_SHORTEST: list = sDaysShortest; break; 315 default: list = sDaysMedium; break; 316 } 317 318 Resources r = Resources.getSystem(); 319 return r.getString(list[dayOfWeek - Calendar.SUNDAY]); 320 } 321 322 /** 323 * Return a localized string for AM or PM. 324 * @param ampm Either {@link Calendar#AM Calendar.AM} or {@link Calendar#PM Calendar.PM}. 325 * @throws IndexOutOfBoundsException if the ampm is out of bounds. 326 * @return Localized version of "AM" or "PM". 327 */ 328 public static String getAMPMString(int ampm) { 329 Resources r = Resources.getSystem(); 330 return r.getString(sAmPm[ampm - Calendar.AM]); 331 } 332 333 /** 334 * Return a localized string for the month of the year. 335 * @param month One of {@link Calendar#JANUARY Calendar.JANUARY}, 336 * {@link Calendar#FEBRUARY Calendar.FEBRUARY}, etc. 337 * @param abbrev One of {@link #LENGTH_LONG}, {@link #LENGTH_MEDIUM}, 338 * or {@link #LENGTH_SHORTEST}. 339 * Undefined lengths will return {@link #LENGTH_MEDIUM} 340 * but may return something different in the future. 341 * @return Localized month of the year. 342 */ 343 public static String getMonthString(int month, int abbrev) { 344 // Note that here we use sMonthsMedium for MEDIUM, SHORT and SHORTER. 345 // This is a shortcut to not spam the translators with too many variations 346 // of the same string. If we find that in a language the distinction 347 // is necessary, we can can add more without changing this API. 348 int[] list; 349 switch (abbrev) { 350 case LENGTH_LONG: list = sMonthsLong; break; 351 case LENGTH_MEDIUM: list = sMonthsMedium; break; 352 case LENGTH_SHORT: list = sMonthsMedium; break; 353 case LENGTH_SHORTER: list = sMonthsMedium; break; 354 case LENGTH_SHORTEST: list = sMonthsShortest; break; 355 default: list = sMonthsMedium; break; 356 } 357 358 Resources r = Resources.getSystem(); 359 return r.getString(list[month - Calendar.JANUARY]); 360 } 361 362 /** 363 * Return a localized string for the month of the year, for 364 * contexts where the month is not formatted together with 365 * a day of the month. 366 * 367 * @param month One of {@link Calendar#JANUARY Calendar.JANUARY}, 368 * {@link Calendar#FEBRUARY Calendar.FEBRUARY}, etc. 369 * @param abbrev One of {@link #LENGTH_LONG}, {@link #LENGTH_MEDIUM}, 370 * or {@link #LENGTH_SHORTEST}. 371 * Undefined lengths will return {@link #LENGTH_MEDIUM} 372 * but may return something different in the future. 373 * @return Localized month of the year. 374 * @hide Pending API council approval 375 */ 376 public static String getStandaloneMonthString(int month, int abbrev) { 377 // Note that here we use sMonthsMedium for MEDIUM, SHORT and SHORTER. 378 // This is a shortcut to not spam the translators with too many variations 379 // of the same string. If we find that in a language the distinction 380 // is necessary, we can can add more without changing this API. 381 int[] list; 382 switch (abbrev) { 383 case LENGTH_LONG: list = sMonthsStandaloneLong; 384 break; 385 case LENGTH_MEDIUM: list = sMonthsMedium; break; 386 case LENGTH_SHORT: list = sMonthsMedium; break; 387 case LENGTH_SHORTER: list = sMonthsMedium; break; 388 case LENGTH_SHORTEST: list = sMonthsShortest; break; 389 default: list = sMonthsMedium; break; 390 } 391 392 Resources r = Resources.getSystem(); 393 return r.getString(list[month - Calendar.JANUARY]); 394 } 395 396 /** 397 * Returns a string describing the elapsed time since startTime. 398 * @param startTime some time in the past. 399 * @return a String object containing the elapsed time. 400 * @see #getRelativeTimeSpanString(long, long, long) 401 */ 402 public static CharSequence getRelativeTimeSpanString(long startTime) { 403 return getRelativeTimeSpanString(startTime, System.currentTimeMillis(), MINUTE_IN_MILLIS); 404 } 405 406 /** 407 * Returns a string describing 'time' as a time relative to 'now'. 408 * <p> 409 * Time spans in the past are formatted like "42 minutes ago". 410 * Time spans in the future are formatted like "in 42 minutes". 411 * 412 * @param time the time to describe, in milliseconds 413 * @param now the current time in milliseconds 414 * @param minResolution the minimum timespan to report. For example, a time 3 seconds in the 415 * past will be reported as "0 minutes ago" if this is set to MINUTE_IN_MILLIS. Pass one of 416 * 0, MINUTE_IN_MILLIS, HOUR_IN_MILLIS, DAY_IN_MILLIS, WEEK_IN_MILLIS 417 */ 418 public static CharSequence getRelativeTimeSpanString(long time, long now, long minResolution) { 419 int flags = FORMAT_SHOW_DATE | FORMAT_SHOW_YEAR | FORMAT_ABBREV_MONTH; 420 return getRelativeTimeSpanString(time, now, minResolution, flags); 421 } 422 423 /** 424 * Returns a string describing 'time' as a time relative to 'now'. 425 * <p> 426 * Time spans in the past are formatted like "42 minutes ago". Time spans in 427 * the future are formatted like "in 42 minutes". 428 * <p> 429 * Can use {@link #FORMAT_ABBREV_RELATIVE} flag to use abbreviated relative 430 * times, like "42 mins ago". 431 * 432 * @param time the time to describe, in milliseconds 433 * @param now the current time in milliseconds 434 * @param minResolution the minimum timespan to report. For example, a time 435 * 3 seconds in the past will be reported as "0 minutes ago" if 436 * this is set to MINUTE_IN_MILLIS. Pass one of 0, 437 * MINUTE_IN_MILLIS, HOUR_IN_MILLIS, DAY_IN_MILLIS, 438 * WEEK_IN_MILLIS 439 * @param flags a bit mask of formatting options, such as 440 * {@link #FORMAT_NUMERIC_DATE} or 441 * {@link #FORMAT_ABBREV_RELATIVE} 442 */ 443 public static CharSequence getRelativeTimeSpanString(long time, long now, long minResolution, 444 int flags) { 445 Resources r = Resources.getSystem(); 446 boolean abbrevRelative = (flags & (FORMAT_ABBREV_RELATIVE | FORMAT_ABBREV_ALL)) != 0; 447 448 boolean past = (now >= time); 449 long duration = Math.abs(now - time); 450 451 int resId; 452 long count; 453 if (duration < MINUTE_IN_MILLIS && minResolution < MINUTE_IN_MILLIS) { 454 count = duration / SECOND_IN_MILLIS; 455 if (past) { 456 if (abbrevRelative) { 457 resId = com.android.internal.R.plurals.abbrev_num_seconds_ago; 458 } else { 459 resId = com.android.internal.R.plurals.num_seconds_ago; 460 } 461 } else { 462 if (abbrevRelative) { 463 resId = com.android.internal.R.plurals.abbrev_in_num_seconds; 464 } else { 465 resId = com.android.internal.R.plurals.in_num_seconds; 466 } 467 } 468 } else if (duration < HOUR_IN_MILLIS && minResolution < HOUR_IN_MILLIS) { 469 count = duration / MINUTE_IN_MILLIS; 470 if (past) { 471 if (abbrevRelative) { 472 resId = com.android.internal.R.plurals.abbrev_num_minutes_ago; 473 } else { 474 resId = com.android.internal.R.plurals.num_minutes_ago; 475 } 476 } else { 477 if (abbrevRelative) { 478 resId = com.android.internal.R.plurals.abbrev_in_num_minutes; 479 } else { 480 resId = com.android.internal.R.plurals.in_num_minutes; 481 } 482 } 483 } else if (duration < DAY_IN_MILLIS && minResolution < DAY_IN_MILLIS) { 484 count = duration / HOUR_IN_MILLIS; 485 if (past) { 486 if (abbrevRelative) { 487 resId = com.android.internal.R.plurals.abbrev_num_hours_ago; 488 } else { 489 resId = com.android.internal.R.plurals.num_hours_ago; 490 } 491 } else { 492 if (abbrevRelative) { 493 resId = com.android.internal.R.plurals.abbrev_in_num_hours; 494 } else { 495 resId = com.android.internal.R.plurals.in_num_hours; 496 } 497 } 498 } else if (duration < WEEK_IN_MILLIS && minResolution < WEEK_IN_MILLIS) { 499 count = duration / DAY_IN_MILLIS; 500 if (past) { 501 if (abbrevRelative) { 502 resId = com.android.internal.R.plurals.abbrev_num_days_ago; 503 } else { 504 resId = com.android.internal.R.plurals.num_days_ago; 505 } 506 } else { 507 if (abbrevRelative) { 508 resId = com.android.internal.R.plurals.abbrev_in_num_days; 509 } else { 510 resId = com.android.internal.R.plurals.in_num_days; 511 } 512 } 513 } else { 514 // We know that we won't be showing the time, so it is safe to pass 515 // in a null context. 516 return formatDateRange(null, time, time, flags); 517 } 518 519 String format = r.getQuantityString(resId, (int) count); 520 return String.format(format, count); 521 } 522 523 /** 524 * Return string describing the elapsed time since startTime formatted like 525 * "[relative time/date], [time]". 526 * <p> 527 * Example output strings for the US date format. 528 * <ul> 529 * <li>3 mins ago, 10:15 AM</li> 530 * <li>yesterday, 12:20 PM</li> 531 * <li>Dec 12, 4:12 AM</li> 532 * <li>11/14/2007, 8:20 AM</li> 533 * </ul> 534 * 535 * @param time some time in the past. 536 * @param minResolution the minimum elapsed time (in milliseconds) to report 537 * when showing relative times. For example, a time 3 seconds in 538 * the past will be reported as "0 minutes ago" if this is set to 539 * {@link #MINUTE_IN_MILLIS}. 540 * @param transitionResolution the elapsed time (in milliseconds) at which 541 * to stop reporting relative measurements. Elapsed times greater 542 * than this resolution will default to normal date formatting. 543 * For example, will transition from "6 days ago" to "Dec 12" 544 * when using {@link #WEEK_IN_MILLIS}. 545 */ 546 public static CharSequence getRelativeDateTimeString(Context c, long time, long minResolution, 547 long transitionResolution, int flags) { 548 Resources r = Resources.getSystem(); 549 550 long now = System.currentTimeMillis(); 551 long duration = Math.abs(now - time); 552 553 // getRelativeTimeSpanString() doesn't correctly format relative dates 554 // above a week or exact dates below a day, so clamp 555 // transitionResolution as needed. 556 if (transitionResolution > WEEK_IN_MILLIS) { 557 transitionResolution = WEEK_IN_MILLIS; 558 } else if (transitionResolution < DAY_IN_MILLIS) { 559 transitionResolution = DAY_IN_MILLIS; 560 } 561 562 CharSequence timeClause = formatDateRange(c, time, time, FORMAT_SHOW_TIME); 563 564 String result; 565 if (duration < transitionResolution) { 566 CharSequence relativeClause = getRelativeTimeSpanString(time, now, minResolution, flags); 567 result = r.getString(com.android.internal.R.string.relative_time, relativeClause, timeClause); 568 } else { 569 CharSequence dateClause = getRelativeTimeSpanString(c, time, false); 570 result = r.getString(com.android.internal.R.string.date_time, dateClause, timeClause); 571 } 572 573 return result; 574 } 575 576 /** 577 * Returns a string describing a day relative to the current day. For example if the day is 578 * today this function returns "Today", if the day was a week ago it returns "7 days ago", and 579 * if the day is in 2 weeks it returns "in 14 days". 580 * 581 * @param r the resources to get the strings from 582 * @param day the relative day to describe in UTC milliseconds 583 * @param today the current time in UTC milliseconds 584 * @return a formatting string 585 */ 586 private static final String getRelativeDayString(Resources r, long day, long today) { 587 Time startTime = new Time(); 588 startTime.set(day); 589 Time currentTime = new Time(); 590 currentTime.set(today); 591 592 int startDay = Time.getJulianDay(day, startTime.gmtoff); 593 int currentDay = Time.getJulianDay(today, currentTime.gmtoff); 594 595 int days = Math.abs(currentDay - startDay); 596 boolean past = (today > day); 597 598 if (days == 1) { 599 if (past) { 600 return r.getString(com.android.internal.R.string.yesterday); 601 } else { 602 return r.getString(com.android.internal.R.string.tomorrow); 603 } 604 } else if (days == 0) { 605 return r.getString(com.android.internal.R.string.today); 606 } 607 608 int resId; 609 if (past) { 610 resId = com.android.internal.R.plurals.num_days_ago; 611 } else { 612 resId = com.android.internal.R.plurals.in_num_days; 613 } 614 615 String format = r.getQuantityString(resId, days); 616 return String.format(format, days); 617 } 618 619 private static void initFormatStrings() { 620 synchronized (sLock) { 621 Resources r = Resources.getSystem(); 622 Configuration cfg = r.getConfiguration(); 623 if (sLastConfig == null || !sLastConfig.equals(cfg)) { 624 sLastConfig = cfg; 625 sStatusTimeFormat = java.text.DateFormat.getTimeInstance(java.text.DateFormat.SHORT); 626 sElapsedFormatMMSS = r.getString(com.android.internal.R.string.elapsed_time_short_format_mm_ss); 627 sElapsedFormatHMMSS = r.getString(com.android.internal.R.string.elapsed_time_short_format_h_mm_ss); 628 } 629 } 630 } 631 632 /** 633 * Format a time so it appears like it would in the status bar clock. 634 * @deprecated use {@link #DateFormat.getTimeFormat(Context)} instead. 635 * @hide 636 */ 637 public static final CharSequence timeString(long millis) { 638 initFormatStrings(); 639 return sStatusTimeFormat.format(millis); 640 } 641 642 /** 643 * Formats an elapsed time in the form "MM:SS" or "H:MM:SS" 644 * for display on the call-in-progress screen. 645 * @param elapsedSeconds the elapsed time in seconds. 646 */ 647 public static String formatElapsedTime(long elapsedSeconds) { 648 return formatElapsedTime(null, elapsedSeconds); 649 } 650 651 /** 652 * Formats an elapsed time in the form "MM:SS" or "H:MM:SS" 653 * for display on the call-in-progress screen. 654 * 655 * @param recycle {@link StringBuilder} to recycle, if possible 656 * @param elapsedSeconds the elapsed time in seconds. 657 */ 658 public static String formatElapsedTime(StringBuilder recycle, long elapsedSeconds) { 659 initFormatStrings(); 660 661 long hours = 0; 662 long minutes = 0; 663 long seconds = 0; 664 665 if (elapsedSeconds >= 3600) { 666 hours = elapsedSeconds / 3600; 667 elapsedSeconds -= hours * 3600; 668 } 669 if (elapsedSeconds >= 60) { 670 minutes = elapsedSeconds / 60; 671 elapsedSeconds -= minutes * 60; 672 } 673 seconds = elapsedSeconds; 674 675 String result; 676 if (hours > 0) { 677 return formatElapsedTime(recycle, sElapsedFormatHMMSS, hours, minutes, seconds); 678 } else { 679 return formatElapsedTime(recycle, sElapsedFormatMMSS, minutes, seconds); 680 } 681 } 682 683 /** 684 * Fast formatting of h:mm:ss 685 */ 686 private static String formatElapsedTime(StringBuilder recycle, String format, long hours, 687 long minutes, long seconds) { 688 if (FAST_FORMAT_HMMSS.equals(format)) { 689 StringBuilder sb = recycle; 690 if (sb == null) { 691 sb = new StringBuilder(8); 692 } else { 693 sb.setLength(0); 694 } 695 sb.append(hours); 696 sb.append(TIME_SEPARATOR); 697 if (minutes < 10) { 698 sb.append(TIME_PADDING); 699 } else { 700 sb.append(toDigitChar(minutes / 10)); 701 } 702 sb.append(toDigitChar(minutes % 10)); 703 sb.append(TIME_SEPARATOR); 704 if (seconds < 10) { 705 sb.append(TIME_PADDING); 706 } else { 707 sb.append(toDigitChar(seconds / 10)); 708 } 709 sb.append(toDigitChar(seconds % 10)); 710 return sb.toString(); 711 } else { 712 return String.format(format, hours, minutes, seconds); 713 } 714 } 715 716 /** 717 * Fast formatting of m:ss 718 */ 719 private static String formatElapsedTime(StringBuilder recycle, String format, long minutes, 720 long seconds) { 721 if (FAST_FORMAT_MMSS.equals(format)) { 722 StringBuilder sb = recycle; 723 if (sb == null) { 724 sb = new StringBuilder(8); 725 } else { 726 sb.setLength(0); 727 } 728 if (minutes < 10) { 729 sb.append(TIME_PADDING); 730 } else { 731 sb.append(toDigitChar(minutes / 10)); 732 } 733 sb.append(toDigitChar(minutes % 10)); 734 sb.append(TIME_SEPARATOR); 735 if (seconds < 10) { 736 sb.append(TIME_PADDING); 737 } else { 738 sb.append(toDigitChar(seconds / 10)); 739 } 740 sb.append(toDigitChar(seconds % 10)); 741 return sb.toString(); 742 } else { 743 return String.format(format, minutes, seconds); 744 } 745 } 746 747 private static char toDigitChar(long digit) { 748 return (char) (digit + '0'); 749 } 750 751 /** 752 * Format a date / time such that if the then is on the same day as now, it shows 753 * just the time and if it's a different day, it shows just the date. 754 * 755 * <p>The parameters dateFormat and timeFormat should each be one of 756 * {@link java.text.DateFormat#DEFAULT}, 757 * {@link java.text.DateFormat#FULL}, 758 * {@link java.text.DateFormat#LONG}, 759 * {@link java.text.DateFormat#MEDIUM} 760 * or 761 * {@link java.text.DateFormat#SHORT} 762 * 763 * @param then the date to format 764 * @param now the base time 765 * @param dateStyle how to format the date portion. 766 * @param timeStyle how to format the time portion. 767 */ 768 public static final CharSequence formatSameDayTime(long then, long now, 769 int dateStyle, int timeStyle) { 770 Calendar thenCal = new GregorianCalendar(); 771 thenCal.setTimeInMillis(then); 772 Date thenDate = thenCal.getTime(); 773 Calendar nowCal = new GregorianCalendar(); 774 nowCal.setTimeInMillis(now); 775 776 java.text.DateFormat f; 777 778 if (thenCal.get(Calendar.YEAR) == nowCal.get(Calendar.YEAR) 779 && thenCal.get(Calendar.MONTH) == nowCal.get(Calendar.MONTH) 780 && thenCal.get(Calendar.DAY_OF_MONTH) == nowCal.get(Calendar.DAY_OF_MONTH)) { 781 f = java.text.DateFormat.getTimeInstance(timeStyle); 782 } else { 783 f = java.text.DateFormat.getDateInstance(dateStyle); 784 } 785 return f.format(thenDate); 786 } 787 788 /** 789 * @hide 790 * @deprecated use {@link android.text.format.Time} 791 */ 792 public static Calendar newCalendar(boolean zulu) 793 { 794 if (zulu) 795 return Calendar.getInstance(TimeZone.getTimeZone("GMT")); 796 797 return Calendar.getInstance(); 798 } 799 800 /** 801 * @return true if the supplied when is today else false 802 */ 803 public static boolean isToday(long when) { 804 Time time = new Time(); 805 time.set(when); 806 807 int thenYear = time.year; 808 int thenMonth = time.month; 809 int thenMonthDay = time.monthDay; 810 811 time.set(System.currentTimeMillis()); 812 return (thenYear == time.year) 813 && (thenMonth == time.month) 814 && (thenMonthDay == time.monthDay); 815 } 816 817 /** 818 * @hide 819 * @deprecated use {@link android.text.format.Time} 820 * Return true if this date string is local time 821 */ 822 public static boolean isUTC(String s) 823 { 824 if (s.length() == 16 && s.charAt(15) == 'Z') { 825 return true; 826 } 827 if (s.length() == 9 && s.charAt(8) == 'Z') { 828 // XXX not sure if this case possible/valid 829 return true; 830 } 831 return false; 832 } 833 834 /** 835 * Return a string containing the date and time in RFC2445 format. 836 * Ensures that the time is written in UTC. The Calendar class doesn't 837 * really help out with this, so this is slower than it ought to be. 838 * 839 * @param cal the date and time to write 840 * @hide 841 * @deprecated use {@link android.text.format.Time} 842 */ 843 public static String writeDateTime(Calendar cal) 844 { 845 TimeZone tz = TimeZone.getTimeZone("GMT"); 846 GregorianCalendar c = new GregorianCalendar(tz); 847 c.setTimeInMillis(cal.getTimeInMillis()); 848 return writeDateTime(c, true); 849 } 850 851 /** 852 * Return a string containing the date and time in RFC2445 format. 853 * 854 * @param cal the date and time to write 855 * @param zulu If the calendar is in UTC, pass true, and a Z will 856 * be written at the end as per RFC2445. Otherwise, the time is 857 * considered in localtime. 858 * @hide 859 * @deprecated use {@link android.text.format.Time} 860 */ 861 public static String writeDateTime(Calendar cal, boolean zulu) 862 { 863 StringBuilder sb = new StringBuilder(); 864 sb.ensureCapacity(16); 865 if (zulu) { 866 sb.setLength(16); 867 sb.setCharAt(15, 'Z'); 868 } else { 869 sb.setLength(15); 870 } 871 return writeDateTime(cal, sb); 872 } 873 874 /** 875 * Return a string containing the date and time in RFC2445 format. 876 * 877 * @param cal the date and time to write 878 * @param sb a StringBuilder to use. It is assumed that setLength 879 * has already been called on sb to the appropriate length 880 * which is sb.setLength(zulu ? 16 : 15) 881 * @hide 882 * @deprecated use {@link android.text.format.Time} 883 */ 884 public static String writeDateTime(Calendar cal, StringBuilder sb) 885 { 886 int n; 887 888 n = cal.get(Calendar.YEAR); 889 sb.setCharAt(3, (char)('0'+n%10)); 890 n /= 10; 891 sb.setCharAt(2, (char)('0'+n%10)); 892 n /= 10; 893 sb.setCharAt(1, (char)('0'+n%10)); 894 n /= 10; 895 sb.setCharAt(0, (char)('0'+n%10)); 896 897 n = cal.get(Calendar.MONTH) + 1; 898 sb.setCharAt(5, (char)('0'+n%10)); 899 n /= 10; 900 sb.setCharAt(4, (char)('0'+n%10)); 901 902 n = cal.get(Calendar.DAY_OF_MONTH); 903 sb.setCharAt(7, (char)('0'+n%10)); 904 n /= 10; 905 sb.setCharAt(6, (char)('0'+n%10)); 906 907 sb.setCharAt(8, 'T'); 908 909 n = cal.get(Calendar.HOUR_OF_DAY); 910 sb.setCharAt(10, (char)('0'+n%10)); 911 n /= 10; 912 sb.setCharAt(9, (char)('0'+n%10)); 913 914 n = cal.get(Calendar.MINUTE); 915 sb.setCharAt(12, (char)('0'+n%10)); 916 n /= 10; 917 sb.setCharAt(11, (char)('0'+n%10)); 918 919 n = cal.get(Calendar.SECOND); 920 sb.setCharAt(14, (char)('0'+n%10)); 921 n /= 10; 922 sb.setCharAt(13, (char)('0'+n%10)); 923 924 return sb.toString(); 925 } 926 927 /** 928 * @hide 929 * @deprecated use {@link android.text.format.Time} 930 */ 931 public static void assign(Calendar lval, Calendar rval) 932 { 933 // there should be a faster way. 934 lval.clear(); 935 lval.setTimeInMillis(rval.getTimeInMillis()); 936 } 937 938 /** 939 * Formats a date or a time range according to the local conventions. 940 * <p> 941 * Note that this is a convenience method. Using it involves creating an 942 * internal {@link java.util.Formatter} instance on-the-fly, which is 943 * somewhat costly in terms of memory and time. This is probably acceptable 944 * if you use the method only rarely, but if you rely on it for formatting a 945 * large number of dates, consider creating and reusing your own 946 * {@link java.util.Formatter} instance and use the version of 947 * {@link #formatDateRange(Context, long, long, int) formatDateRange} 948 * that takes a {@link java.util.Formatter}. 949 * 950 * @param context the context is required only if the time is shown 951 * @param startMillis the start time in UTC milliseconds 952 * @param endMillis the end time in UTC milliseconds 953 * @param flags a bit mask of options See 954 * {@link #formatDateRange(Context, long, long, int) formatDateRange} 955 * @return a string containing the formatted date/time range. 956 */ 957 public static String formatDateRange(Context context, long startMillis, 958 long endMillis, int flags) { 959 Formatter f = new Formatter(new StringBuilder(50), Locale.getDefault()); 960 return formatDateRange(context, f, startMillis, endMillis, flags).toString(); 961 } 962 963 /** 964 * Formats a date or a time range according to the local conventions. 965 * 966 * <p> 967 * Example output strings (date formats in these examples are shown using 968 * the US date format convention but that may change depending on the 969 * local settings): 970 * <ul> 971 * <li>10:15am</li> 972 * <li>3:00pm - 4:00pm</li> 973 * <li>3pm - 4pm</li> 974 * <li>3PM - 4PM</li> 975 * <li>08:00 - 17:00</li> 976 * <li>Oct 9</li> 977 * <li>Tue, Oct 9</li> 978 * <li>October 9, 2007</li> 979 * <li>Oct 9 - 10</li> 980 * <li>Oct 9 - 10, 2007</li> 981 * <li>Oct 28 - Nov 3, 2007</li> 982 * <li>Dec 31, 2007 - Jan 1, 2008</li> 983 * <li>Oct 9, 8:00am - Oct 10, 5:00pm</li> 984 * <li>12/31/2007 - 01/01/2008</li> 985 * </ul> 986 * 987 * <p> 988 * The flags argument is a bitmask of options from the following list: 989 * 990 * <ul> 991 * <li>FORMAT_SHOW_TIME</li> 992 * <li>FORMAT_SHOW_WEEKDAY</li> 993 * <li>FORMAT_SHOW_YEAR</li> 994 * <li>FORMAT_NO_YEAR</li> 995 * <li>FORMAT_SHOW_DATE</li> 996 * <li>FORMAT_NO_MONTH_DAY</li> 997 * <li>FORMAT_12HOUR</li> 998 * <li>FORMAT_24HOUR</li> 999 * <li>FORMAT_CAP_AMPM</li> 1000 * <li>FORMAT_NO_NOON</li> 1001 * <li>FORMAT_CAP_NOON</li> 1002 * <li>FORMAT_NO_MIDNIGHT</li> 1003 * <li>FORMAT_CAP_MIDNIGHT</li> 1004 * <li>FORMAT_UTC</li> 1005 * <li>FORMAT_ABBREV_TIME</li> 1006 * <li>FORMAT_ABBREV_WEEKDAY</li> 1007 * <li>FORMAT_ABBREV_MONTH</li> 1008 * <li>FORMAT_ABBREV_ALL</li> 1009 * <li>FORMAT_NUMERIC_DATE</li> 1010 * </ul> 1011 * 1012 * <p> 1013 * If FORMAT_SHOW_TIME is set, the time is shown as part of the date range. 1014 * If the start and end time are the same, then just the start time is 1015 * shown. 1016 * 1017 * <p> 1018 * If FORMAT_SHOW_WEEKDAY is set, then the weekday is shown. 1019 * 1020 * <p> 1021 * If FORMAT_SHOW_YEAR is set, then the year is always shown. 1022 * If FORMAT_NO_YEAR is set, then the year is not shown. 1023 * If neither FORMAT_SHOW_YEAR nor FORMAT_NO_YEAR are set, then the year 1024 * is shown only if it is different from the current year, or if the start 1025 * and end dates fall on different years. If both are set, 1026 * FORMAT_SHOW_YEAR takes precedence. 1027 * 1028 * <p> 1029 * Normally the date is shown unless the start and end day are the same. 1030 * If FORMAT_SHOW_DATE is set, then the date is always shown, even for 1031 * same day ranges. 1032 * 1033 * <p> 1034 * If FORMAT_NO_MONTH_DAY is set, then if the date is shown, just the 1035 * month name will be shown, not the day of the month. For example, 1036 * "January, 2008" instead of "January 6 - 12, 2008". 1037 * 1038 * <p> 1039 * If FORMAT_CAP_AMPM is set and 12-hour time is used, then the "AM" 1040 * and "PM" are capitalized. You should not use this flag 1041 * because in some locales these terms cannot be capitalized, and in 1042 * many others it doesn't make sense to do so even though it is possible. 1043 * 1044 * <p> 1045 * If FORMAT_NO_NOON is set and 12-hour time is used, then "12pm" is 1046 * shown instead of "noon". 1047 * 1048 * <p> 1049 * If FORMAT_CAP_NOON is set and 12-hour time is used, then "Noon" is 1050 * shown instead of "noon". You should probably not use this flag 1051 * because in many locales it will not make sense to capitalize 1052 * the term. 1053 * 1054 * <p> 1055 * If FORMAT_NO_MIDNIGHT is set and 12-hour time is used, then "12am" is 1056 * shown instead of "midnight". 1057 * 1058 * <p> 1059 * If FORMAT_CAP_MIDNIGHT is set and 12-hour time is used, then "Midnight" 1060 * is shown instead of "midnight". You should probably not use this 1061 * flag because in many locales it will not make sense to capitalize 1062 * the term. 1063 * 1064 * <p> 1065 * If FORMAT_12HOUR is set and the time is shown, then the time is 1066 * shown in the 12-hour time format. You should not normally set this. 1067 * Instead, let the time format be chosen automatically according to the 1068 * system settings. If both FORMAT_12HOUR and FORMAT_24HOUR are set, then 1069 * FORMAT_24HOUR takes precedence. 1070 * 1071 * <p> 1072 * If FORMAT_24HOUR is set and the time is shown, then the time is 1073 * shown in the 24-hour time format. You should not normally set this. 1074 * Instead, let the time format be chosen automatically according to the 1075 * system settings. If both FORMAT_12HOUR and FORMAT_24HOUR are set, then 1076 * FORMAT_24HOUR takes precedence. 1077 * 1078 * <p> 1079 * If FORMAT_UTC is set, then the UTC timezone is used for the start 1080 * and end milliseconds. 1081 * 1082 * <p> 1083 * If FORMAT_ABBREV_TIME is set and 12-hour time format is used, then the 1084 * start and end times (if shown) are abbreviated by not showing the minutes 1085 * if they are zero. For example, instead of "3:00pm" the time would be 1086 * abbreviated to "3pm". 1087 * 1088 * <p> 1089 * If FORMAT_ABBREV_WEEKDAY is set, then the weekday (if shown) is 1090 * abbreviated to a 3-letter string. 1091 * 1092 * <p> 1093 * If FORMAT_ABBREV_MONTH is set, then the month (if shown) is abbreviated 1094 * to a 3-letter string. 1095 * 1096 * <p> 1097 * If FORMAT_ABBREV_ALL is set, then the weekday and the month (if shown) 1098 * are abbreviated to 3-letter strings. 1099 * 1100 * <p> 1101 * If FORMAT_NUMERIC_DATE is set, then the date is shown in numeric format 1102 * instead of using the name of the month. For example, "12/31/2008" 1103 * instead of "December 31, 2008". 1104 * 1105 * @param context the context is required only if the time is shown 1106 * @param formatter the Formatter used for formatting the date range. 1107 * Note: be sure to call setLength(0) on StringBuilder passed to 1108 * the Formatter constructor unless you want the results to accumulate. 1109 * @param startMillis the start time in UTC milliseconds 1110 * @param endMillis the end time in UTC milliseconds 1111 * @param flags a bit mask of options 1112 * 1113 * @return the formatter with the formatted date/time range appended to the string buffer. 1114 */ 1115 public static Formatter formatDateRange(Context context, Formatter formatter, long startMillis, 1116 long endMillis, int flags) { 1117 Resources res = Resources.getSystem(); 1118 boolean showTime = (flags & FORMAT_SHOW_TIME) != 0; 1119 boolean showWeekDay = (flags & FORMAT_SHOW_WEEKDAY) != 0; 1120 boolean showYear = (flags & FORMAT_SHOW_YEAR) != 0; 1121 boolean noYear = (flags & FORMAT_NO_YEAR) != 0; 1122 boolean useUTC = (flags & FORMAT_UTC) != 0; 1123 boolean abbrevWeekDay = (flags & (FORMAT_ABBREV_WEEKDAY | FORMAT_ABBREV_ALL)) != 0; 1124 boolean abbrevMonth = (flags & (FORMAT_ABBREV_MONTH | FORMAT_ABBREV_ALL)) != 0; 1125 boolean noMonthDay = (flags & FORMAT_NO_MONTH_DAY) != 0; 1126 boolean numericDate = (flags & FORMAT_NUMERIC_DATE) != 0; 1127 1128 // If we're getting called with a single instant in time (from 1129 // e.g. formatDateTime(), below), then we can skip a lot of 1130 // computation below that'd otherwise be thrown out. 1131 boolean isInstant = (startMillis == endMillis); 1132 1133 Time startDate = useUTC ? new Time(Time.TIMEZONE_UTC) : new Time(); 1134 startDate.set(startMillis); 1135 1136 Time endDate; 1137 int dayDistance; 1138 if (isInstant) { 1139 endDate = startDate; 1140 dayDistance = 0; 1141 } else { 1142 endDate = useUTC ? new Time(Time.TIMEZONE_UTC) : new Time(); 1143 endDate.set(endMillis); 1144 int startJulianDay = Time.getJulianDay(startMillis, startDate.gmtoff); 1145 int endJulianDay = Time.getJulianDay(endMillis, endDate.gmtoff); 1146 dayDistance = endJulianDay - startJulianDay; 1147 } 1148 1149 // If the end date ends at 12am at the beginning of a day, 1150 // then modify it to make it look like it ends at midnight on 1151 // the previous day. This will allow us to display "8pm - midnight", 1152 // for example, instead of "Nov 10, 8pm - Nov 11, 12am". But we only do 1153 // this if it is midnight of the same day as the start date because 1154 // for multiple-day events, an end time of "midnight on Nov 11" is 1155 // ambiguous and confusing (is that midnight the start of Nov 11, or 1156 // the end of Nov 11?). 1157 // If we are not showing the time then also adjust the end date 1158 // for multiple-day events. This is to allow us to display, for 1159 // example, "Nov 10 -11" for an event with a start date of Nov 10 1160 // and an end date of Nov 12 at 00:00. 1161 // If the start and end time are the same, then skip this and don't 1162 // adjust the date. 1163 if (!isInstant 1164 && (endDate.hour | endDate.minute | endDate.second) == 0 1165 && (!showTime || dayDistance <= 1)) { 1166 endDate.monthDay -= 1; 1167 endDate.normalize(true /* ignore isDst */); 1168 } 1169 1170 int startDay = startDate.monthDay; 1171 int startMonthNum = startDate.month; 1172 int startYear = startDate.year; 1173 1174 int endDay = endDate.monthDay; 1175 int endMonthNum = endDate.month; 1176 int endYear = endDate.year; 1177 1178 String startWeekDayString = ""; 1179 String endWeekDayString = ""; 1180 if (showWeekDay) { 1181 String weekDayFormat = ""; 1182 if (abbrevWeekDay) { 1183 weekDayFormat = ABBREV_WEEKDAY_FORMAT; 1184 } else { 1185 weekDayFormat = WEEKDAY_FORMAT; 1186 } 1187 startWeekDayString = startDate.format(weekDayFormat); 1188 endWeekDayString = isInstant ? startWeekDayString : endDate.format(weekDayFormat); 1189 } 1190 1191 String startTimeString = ""; 1192 String endTimeString = ""; 1193 if (showTime) { 1194 String startTimeFormat = ""; 1195 String endTimeFormat = ""; 1196 boolean force24Hour = (flags & FORMAT_24HOUR) != 0; 1197 boolean force12Hour = (flags & FORMAT_12HOUR) != 0; 1198 boolean use24Hour; 1199 if (force24Hour) { 1200 use24Hour = true; 1201 } else if (force12Hour) { 1202 use24Hour = false; 1203 } else { 1204 use24Hour = DateFormat.is24HourFormat(context); 1205 } 1206 if (use24Hour) { 1207 startTimeFormat = endTimeFormat = 1208 res.getString(com.android.internal.R.string.hour_minute_24); 1209 } else { 1210 boolean abbrevTime = (flags & (FORMAT_ABBREV_TIME | FORMAT_ABBREV_ALL)) != 0; 1211 boolean capAMPM = (flags & FORMAT_CAP_AMPM) != 0; 1212 boolean noNoon = (flags & FORMAT_NO_NOON) != 0; 1213 boolean capNoon = (flags & FORMAT_CAP_NOON) != 0; 1214 boolean noMidnight = (flags & FORMAT_NO_MIDNIGHT) != 0; 1215 boolean capMidnight = (flags & FORMAT_CAP_MIDNIGHT) != 0; 1216 1217 boolean startOnTheHour = startDate.minute == 0 && startDate.second == 0; 1218 boolean endOnTheHour = endDate.minute == 0 && endDate.second == 0; 1219 if (abbrevTime && startOnTheHour) { 1220 if (capAMPM) { 1221 startTimeFormat = res.getString(com.android.internal.R.string.hour_cap_ampm); 1222 } else { 1223 startTimeFormat = res.getString(com.android.internal.R.string.hour_ampm); 1224 } 1225 } else { 1226 if (capAMPM) { 1227 startTimeFormat = res.getString(com.android.internal.R.string.hour_minute_cap_ampm); 1228 } else { 1229 startTimeFormat = res.getString(com.android.internal.R.string.hour_minute_ampm); 1230 } 1231 } 1232 1233 // Don't waste time on setting endTimeFormat when 1234 // we're dealing with an instant, where we'll never 1235 // need the end point. (It's the same as the start 1236 // point) 1237 if (!isInstant) { 1238 if (abbrevTime && endOnTheHour) { 1239 if (capAMPM) { 1240 endTimeFormat = res.getString(com.android.internal.R.string.hour_cap_ampm); 1241 } else { 1242 endTimeFormat = res.getString(com.android.internal.R.string.hour_ampm); 1243 } 1244 } else { 1245 if (capAMPM) { 1246 endTimeFormat = res.getString(com.android.internal.R.string.hour_minute_cap_ampm); 1247 } else { 1248 endTimeFormat = res.getString(com.android.internal.R.string.hour_minute_ampm); 1249 } 1250 } 1251 1252 if (endDate.hour == 12 && endOnTheHour && !noNoon) { 1253 if (capNoon) { 1254 endTimeFormat = res.getString(com.android.internal.R.string.Noon); 1255 } else { 1256 endTimeFormat = res.getString(com.android.internal.R.string.noon); 1257 } 1258 } else if (endDate.hour == 0 && endOnTheHour && !noMidnight) { 1259 if (capMidnight) { 1260 endTimeFormat = res.getString(com.android.internal.R.string.Midnight); 1261 } else { 1262 endTimeFormat = res.getString(com.android.internal.R.string.midnight); 1263 } 1264 } 1265 } 1266 1267 if (startDate.hour == 12 && startOnTheHour && !noNoon) { 1268 if (capNoon) { 1269 startTimeFormat = res.getString(com.android.internal.R.string.Noon); 1270 } else { 1271 startTimeFormat = res.getString(com.android.internal.R.string.noon); 1272 } 1273 // Don't show the start time starting at midnight. Show 1274 // 12am instead. 1275 } 1276 } 1277 1278 startTimeString = startDate.format(startTimeFormat); 1279 endTimeString = isInstant ? startTimeString : endDate.format(endTimeFormat); 1280 } 1281 1282 // Show the year if the user specified FORMAT_SHOW_YEAR or if 1283 // the starting and end years are different from each other 1284 // or from the current year. But don't show the year if the 1285 // user specified FORMAT_NO_YEAR. 1286 if (showYear) { 1287 // No code... just a comment for clarity. Keep showYear 1288 // on, as they enabled it with FORMAT_SHOW_YEAR. This 1289 // takes precedence over them setting FORMAT_NO_YEAR. 1290 } else if (noYear) { 1291 // They explicitly didn't want a year. 1292 showYear = false; 1293 } else if (startYear != endYear) { 1294 showYear = true; 1295 } else { 1296 // Show the year if it's not equal to the current year. 1297 Time currentTime = new Time(); 1298 currentTime.setToNow(); 1299 showYear = startYear != currentTime.year; 1300 } 1301 1302 String defaultDateFormat, fullFormat, dateRange; 1303 if (numericDate) { 1304 defaultDateFormat = res.getString(com.android.internal.R.string.numeric_date); 1305 } else if (showYear) { 1306 if (abbrevMonth) { 1307 if (noMonthDay) { 1308 defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month_year); 1309 } else { 1310 defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month_day_year); 1311 } 1312 } else { 1313 if (noMonthDay) { 1314 defaultDateFormat = res.getString(com.android.internal.R.string.month_year); 1315 } else { 1316 defaultDateFormat = res.getString(com.android.internal.R.string.month_day_year); 1317 } 1318 } 1319 } else { 1320 if (abbrevMonth) { 1321 if (noMonthDay) { 1322 defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month); 1323 } else { 1324 defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month_day); 1325 } 1326 } else { 1327 if (noMonthDay) { 1328 defaultDateFormat = res.getString(com.android.internal.R.string.month); 1329 } else { 1330 defaultDateFormat = res.getString(com.android.internal.R.string.month_day); 1331 } 1332 } 1333 } 1334 1335 if (showWeekDay) { 1336 if (showTime) { 1337 fullFormat = res.getString(com.android.internal.R.string.wday1_date1_time1_wday2_date2_time2); 1338 } else { 1339 fullFormat = res.getString(com.android.internal.R.string.wday1_date1_wday2_date2); 1340 } 1341 } else { 1342 if (showTime) { 1343 fullFormat = res.getString(com.android.internal.R.string.date1_time1_date2_time2); 1344 } else { 1345 fullFormat = res.getString(com.android.internal.R.string.date1_date2); 1346 } 1347 } 1348 1349 if (noMonthDay && startMonthNum == endMonthNum) { 1350 // Example: "January, 2008" 1351 return formatter.format("%s", startDate.format(defaultDateFormat)); 1352 } 1353 1354 if (startYear != endYear || noMonthDay) { 1355 // Different year or we are not showing the month day number. 1356 // Example: "December 31, 2007 - January 1, 2008" 1357 // Or: "January - February, 2008" 1358 String startDateString = startDate.format(defaultDateFormat); 1359 String endDateString = endDate.format(defaultDateFormat); 1360 1361 // The values that are used in a fullFormat string are specified 1362 // by position. 1363 return formatter.format(fullFormat, 1364 startWeekDayString, startDateString, startTimeString, 1365 endWeekDayString, endDateString, endTimeString); 1366 } 1367 1368 // Get the month, day, and year strings for the start and end dates 1369 String monthFormat; 1370 if (numericDate) { 1371 monthFormat = NUMERIC_MONTH_FORMAT; 1372 } else if (abbrevMonth) { 1373 monthFormat = 1374 res.getString(com.android.internal.R.string.short_format_month); 1375 } else { 1376 monthFormat = MONTH_FORMAT; 1377 } 1378 String startMonthString = startDate.format(monthFormat); 1379 String startMonthDayString = startDate.format(MONTH_DAY_FORMAT); 1380 String startYearString = startDate.format(YEAR_FORMAT); 1381 1382 String endMonthString = isInstant ? null : endDate.format(monthFormat); 1383 String endMonthDayString = isInstant ? null : endDate.format(MONTH_DAY_FORMAT); 1384 String endYearString = isInstant ? null : endDate.format(YEAR_FORMAT); 1385 1386 if (startMonthNum != endMonthNum) { 1387 // Same year, different month. 1388 // Example: "October 28 - November 3" 1389 // or: "Wed, Oct 31 - Sat, Nov 3, 2007" 1390 // or: "Oct 31, 8am - Sat, Nov 3, 2007, 5pm" 1391 1392 int index = 0; 1393 if (showWeekDay) index = 1; 1394 if (showYear) index += 2; 1395 if (showTime) index += 4; 1396 if (numericDate) index += 8; 1397 int resId = sameYearTable[index]; 1398 fullFormat = res.getString(resId); 1399 1400 // The values that are used in a fullFormat string are specified 1401 // by position. 1402 return formatter.format(fullFormat, 1403 startWeekDayString, startMonthString, startMonthDayString, 1404 startYearString, startTimeString, 1405 endWeekDayString, endMonthString, endMonthDayString, 1406 endYearString, endTimeString); 1407 } 1408 1409 if (startDay != endDay) { 1410 // Same month, different day. 1411 int index = 0; 1412 if (showWeekDay) index = 1; 1413 if (showYear) index += 2; 1414 if (showTime) index += 4; 1415 if (numericDate) index += 8; 1416 int resId = sameMonthTable[index]; 1417 fullFormat = res.getString(resId); 1418 1419 // The values that are used in a fullFormat string are specified 1420 // by position. 1421 return formatter.format(fullFormat, 1422 startWeekDayString, startMonthString, startMonthDayString, 1423 startYearString, startTimeString, 1424 endWeekDayString, endMonthString, endMonthDayString, 1425 endYearString, endTimeString); 1426 } 1427 1428 // Same start and end day 1429 boolean showDate = (flags & FORMAT_SHOW_DATE) != 0; 1430 1431 // If nothing was specified, then show the date. 1432 if (!showTime && !showDate && !showWeekDay) showDate = true; 1433 1434 // Compute the time string (example: "10:00 - 11:00 am") 1435 String timeString = ""; 1436 if (showTime) { 1437 // If the start and end time are the same, then just show the 1438 // start time. 1439 if (isInstant) { 1440 // Same start and end time. 1441 // Example: "10:15 AM" 1442 timeString = startTimeString; 1443 } else { 1444 // Example: "10:00 - 11:00 am" 1445 String timeFormat = res.getString(com.android.internal.R.string.time1_time2); 1446 // Don't use the user supplied Formatter because the result will pollute the buffer. 1447 timeString = String.format(timeFormat, startTimeString, endTimeString); 1448 } 1449 } 1450 1451 // Figure out which full format to use. 1452 fullFormat = ""; 1453 String dateString = ""; 1454 if (showDate) { 1455 dateString = startDate.format(defaultDateFormat); 1456 if (showWeekDay) { 1457 if (showTime) { 1458 // Example: "10:00 - 11:00 am, Tue, Oct 9" 1459 fullFormat = res.getString(com.android.internal.R.string.time_wday_date); 1460 } else { 1461 // Example: "Tue, Oct 9" 1462 fullFormat = res.getString(com.android.internal.R.string.wday_date); 1463 } 1464 } else { 1465 if (showTime) { 1466 // Example: "10:00 - 11:00 am, Oct 9" 1467 fullFormat = res.getString(com.android.internal.R.string.time_date); 1468 } else { 1469 // Example: "Oct 9" 1470 return formatter.format("%s", dateString); 1471 } 1472 } 1473 } else if (showWeekDay) { 1474 if (showTime) { 1475 // Example: "10:00 - 11:00 am, Tue" 1476 fullFormat = res.getString(com.android.internal.R.string.time_wday); 1477 } else { 1478 // Example: "Tue" 1479 return formatter.format("%s", startWeekDayString); 1480 } 1481 } else if (showTime) { 1482 return formatter.format("%s", timeString); 1483 } 1484 1485 // The values that are used in a fullFormat string are specified 1486 // by position. 1487 return formatter.format(fullFormat, timeString, startWeekDayString, dateString); 1488 } 1489 1490 /** 1491 * Formats a date or a time according to the local conventions. There are 1492 * lots of options that allow the caller to control, for example, if the 1493 * time is shown, if the day of the week is shown, if the month name is 1494 * abbreviated, if noon is shown instead of 12pm, and so on. For the 1495 * complete list of options, see the documentation for 1496 * {@link #formatDateRange}. 1497 * <p> 1498 * Example output strings (date formats in these examples are shown using 1499 * the US date format convention but that may change depending on the 1500 * local settings): 1501 * <ul> 1502 * <li>10:15am</li> 1503 * <li>3:00pm</li> 1504 * <li>3pm</li> 1505 * <li>3PM</li> 1506 * <li>08:00</li> 1507 * <li>17:00</li> 1508 * <li>noon</li> 1509 * <li>Noon</li> 1510 * <li>midnight</li> 1511 * <li>Midnight</li> 1512 * <li>Oct 31</li> 1513 * <li>Oct 31, 2007</li> 1514 * <li>October 31, 2007</li> 1515 * <li>10am, Oct 31</li> 1516 * <li>17:00, Oct 31</li> 1517 * <li>Wed</li> 1518 * <li>Wednesday</li> 1519 * <li>10am, Wed, Oct 31</li> 1520 * <li>Wed, Oct 31</li> 1521 * <li>Wednesday, Oct 31</li> 1522 * <li>Wed, Oct 31, 2007</li> 1523 * <li>Wed, October 31</li> 1524 * <li>10/31/2007</li> 1525 * </ul> 1526 * 1527 * @param context the context is required only if the time is shown 1528 * @param millis a point in time in UTC milliseconds 1529 * @param flags a bit mask of formatting options 1530 * @return a string containing the formatted date/time. 1531 */ 1532 public static String formatDateTime(Context context, long millis, int flags) { 1533 return formatDateRange(context, millis, millis, flags); 1534 } 1535 1536 /** 1537 * @return a relative time string to display the time expressed by millis. Times 1538 * are counted starting at midnight, which means that assuming that the current 1539 * time is March 31st, 0:30: 1540 * <ul> 1541 * <li>"millis=0:10 today" will be displayed as "0:10"</li> 1542 * <li>"millis=11:30pm the day before" will be displayed as "Mar 30"</li> 1543 * </ul> 1544 * If the given millis is in a different year, then the full date is 1545 * returned in numeric format (e.g., "10/12/2008"). 1546 * 1547 * @param withPreposition If true, the string returned will include the correct 1548 * preposition ("at 9:20am", "on 10/12/2008" or "on May 29"). 1549 */ 1550 public static CharSequence getRelativeTimeSpanString(Context c, long millis, 1551 boolean withPreposition) { 1552 1553 long now = System.currentTimeMillis(); 1554 long span = now - millis; 1555 1556 if (sNowTime == null) { 1557 sNowTime = new Time(); 1558 sThenTime = new Time(); 1559 } 1560 1561 sNowTime.set(now); 1562 sThenTime.set(millis); 1563 1564 String result; 1565 int prepositionId; 1566 if (span < DAY_IN_MILLIS && sNowTime.weekDay == sThenTime.weekDay) { 1567 // Same day 1568 int flags = FORMAT_SHOW_TIME; 1569 result = formatDateRange(c, millis, millis, flags); 1570 prepositionId = R.string.preposition_for_time; 1571 } else if (sNowTime.year != sThenTime.year) { 1572 // Different years 1573 int flags = FORMAT_SHOW_DATE | FORMAT_SHOW_YEAR | FORMAT_NUMERIC_DATE; 1574 result = formatDateRange(c, millis, millis, flags); 1575 1576 // This is a date (like "10/31/2008" so use the date preposition) 1577 prepositionId = R.string.preposition_for_date; 1578 } else { 1579 // Default 1580 int flags = FORMAT_SHOW_DATE | FORMAT_ABBREV_MONTH; 1581 result = formatDateRange(c, millis, millis, flags); 1582 prepositionId = R.string.preposition_for_date; 1583 } 1584 if (withPreposition) { 1585 Resources res = c.getResources(); 1586 result = res.getString(prepositionId, result); 1587 } 1588 return result; 1589 } 1590 1591 /** 1592 * Convenience function to return relative time string without preposition. 1593 * @param c context for resources 1594 * @param millis time in milliseconds 1595 * @return {@link CharSequence} containing relative time. 1596 * @see #getRelativeTimeSpanString(Context, long, boolean) 1597 */ 1598 public static CharSequence getRelativeTimeSpanString(Context c, long millis) { 1599 return getRelativeTimeSpanString(c, millis, false /* no preposition */); 1600 } 1601 1602 private static Time sNowTime; 1603 private static Time sThenTime; 1604} 1605