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am dbca824d: Merge "Add DateFormat.getBestDateTimePattern." into jb-mr2-dev

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* commit 'dbca824dc00209c603a956f45bb684e57ee3e478':
  Add DateFormat.getBestDateTimePattern.
This commit is contained in:
Elliott Hughes
2013-04-02 12:21:48 -07:00
committed by Android Git Automerger
parent 69fe406929 dbca824dc0
commit 1113956349
2 changed files with 36 additions and 0 deletions
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1
api/current.txt
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@@ -22805,6 +22805,7 @@ package android.text.format {
method public static java.lang.CharSequence format(java.lang.CharSequence, long);
method public static java.lang.CharSequence format(java.lang.CharSequence, java.util.Date);
method public static java.lang.CharSequence format(java.lang.CharSequence, java.util.Calendar);
method public static java.lang.String getBestDateTimePattern(java.util.Locale, java.lang.String);
method public static java.text.DateFormat getDateFormat(android.content.Context);
method public static char[] getDateFormatOrder(android.content.Context);
method public static java.text.DateFormat getLongDateFormat(android.content.Context);

35
core/java/android/text/format/DateFormat.java
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@@ -31,6 +31,7 @@ import java.util.Locale;
import java.util.TimeZone;
import java.text.SimpleDateFormat;
import libcore.icu.ICU;
import libcore.icu.LocaleData;
/**
@@ -43,6 +44,9 @@ import libcore.icu.LocaleData;
* for both formatting and parsing dates. For the canonical documentation
* of format strings, see {@link java.text.SimpleDateFormat}.
*
* <p>In cases where the system does not provide a suitable pattern,
* this class offers the {@link #getBestDateTimePattern} method.
*
* <p>The {@code format} methods in this class implement a subset of Unicode
* <a href="http://www.unicode.org/reports/tr35/#Date_Format_Patterns">UTS #35</a> patterns.
* The subset currently supported by this class includes the following format characters:
@@ -163,6 +167,37 @@ public class DateFormat {
return value.equals("24");
}
/**
* Returns the best possible localized form of the given skeleton for the given
* locale. A skeleton is similar to, and uses the same format characters as, a Unicode
* <a href="http://www.unicode.org/reports/tr35/#Date_Format_Patterns">UTS #35</a>
* pattern.
*
* <p>One difference is that order is irrelevant. For example, "MMMMd" will return
* "MMMM d" in the {@code en_US} locale, but "d. MMMM" in the {@code de_CH} locale.
*
* <p>Note also in that second example that the necessary punctuation for German was
* added. For the same input in {@code es_ES}, we'd have even more extra text:
* "d 'de' MMMM".
*
* <p>This method will automatically correct for grammatical necessity. Given the
* same "MMMMd" input, this method will return "d LLLL" in the {@code fa_IR} locale,
* where stand-alone months are necessary. Lengths are preserved where meaningful,
* so "Md" would give a different result to "MMMd", say, except in a locale such as
* {@code ja_JP} where there is only one length of month.
*
* <p>This method will only return patterns that are in CLDR, and is useful whenever
* you know what elements you want in your format string but don't want to make your
* code specific to any one locale.
*
* @param locale the locale into which the skeleton should be localized
* @param skeleton a skeleton as described above
* @return a string pattern suitable for use with {@link java.text.SimpleDateFormat}.
*/
public static String getBestDateTimePattern(Locale locale, String skeleton) {
return ICU.getBestDateTimePattern(skeleton, locale.toString());
}
/**
* Returns a {@link java.text.DateFormat} object that can format the time according
* to the current locale and the user's 12-/24-hour clock preference.