summaryrefslogtreecommitdiff
path: root/core/java/android/util/TimeUtils.java
diff options
context:
space:
mode:
Diffstat (limited to 'core/java/android/util/TimeUtils.java')
-rw-r--r--core/java/android/util/TimeUtils.java170
1 files changed, 54 insertions, 116 deletions
diff --git a/core/java/android/util/TimeUtils.java b/core/java/android/util/TimeUtils.java
index 37d675707a84..2b03ed6c3ae1 100644
--- a/core/java/android/util/TimeUtils.java
+++ b/core/java/android/util/TimeUtils.java
@@ -16,25 +16,17 @@
package android.util;
-import android.content.res.Resources;
-import android.content.res.XmlResourceParser;
import android.os.SystemClock;
-import android.text.format.DateUtils;
-import com.android.internal.util.XmlUtils;
-
-import org.xmlpull.v1.XmlPullParser;
-import org.xmlpull.v1.XmlPullParserException;
-
-import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collection;
+import java.util.Collections;
import java.util.Date;
-import java.util.TimeZone;
-
+import java.util.List;
+import libcore.util.TimeZoneFinder;
import libcore.util.ZoneInfoDB;
/**
@@ -45,14 +37,9 @@ public class TimeUtils {
private static final boolean DBG = false;
private static final String TAG = "TimeUtils";
- /** Cached results of getTineZones */
- private static final Object sLastLockObj = new Object();
- private static ArrayList<TimeZone> sLastZones = null;
- private static String sLastCountry = null;
-
/** Cached results of getTimeZonesWithUniqueOffsets */
private static final Object sLastUniqueLockObj = new Object();
- private static ArrayList<TimeZone> sLastUniqueZoneOffsets = null;
+ private static List<String> sLastUniqueZoneOffsets = null;
private static String sLastUniqueCountry = null;
/** {@hide} */
@@ -63,50 +50,39 @@ public class TimeUtils {
* and DST value at the specified moment in the specified country.
* Returns null if no suitable zone could be found.
*/
- public static TimeZone getTimeZone(int offset, boolean dst, long when, String country) {
- TimeZone best = null;
- final Date d = new Date(when);
-
- TimeZone current = TimeZone.getDefault();
- String currentName = current.getID();
- int currentOffset = current.getOffset(when);
- boolean currentDst = current.inDaylightTime(d);
-
- for (TimeZone tz : getTimeZones(country)) {
- // If the current time zone is from the right country
- // and meets the other known properties, keep it
- // instead of changing to another one.
-
- if (tz.getID().equals(currentName)) {
- if (currentOffset == offset && currentDst == dst) {
- return current;
- }
- }
+ public static java.util.TimeZone getTimeZone(
+ int offset, boolean dst, long when, String country) {
- // Otherwise, take the first zone from the right
- // country that has the correct current offset and DST.
- // (Keep iterating instead of returning in case we
- // haven't encountered the current time zone yet.)
+ android.icu.util.TimeZone icuTimeZone = getIcuTimeZone(offset, dst, when, country);
+ // We must expose a java.util.TimeZone here for API compatibility because this is a public
+ // API method.
+ return icuTimeZone != null ? java.util.TimeZone.getTimeZone(icuTimeZone.getID()) : null;
+ }
- if (best == null) {
- if (tz.getOffset(when) == offset &&
- tz.inDaylightTime(d) == dst) {
- best = tz;
- }
- }
+ /**
+ * Tries to return a frozen ICU time zone that would have had the specified offset
+ * and DST value at the specified moment in the specified country.
+ * Returns null if no suitable zone could be found.
+ */
+ private static android.icu.util.TimeZone getIcuTimeZone(
+ int offset, boolean dst, long when, String country) {
+ if (country == null) {
+ return null;
}
- return best;
+ android.icu.util.TimeZone bias = android.icu.util.TimeZone.getDefault();
+ return TimeZoneFinder.getInstance()
+ .lookupTimeZoneByCountryAndOffset(country, offset, dst, when, bias);
}
/**
- * Return list of unique time zones for the country. Do not modify
+ * Returns an immutable list of unique time zone IDs for the country.
*
* @param country to find
- * @return list of unique time zones, maybe empty but never null. Do not modify.
+ * @return unmodifiable list of unique time zones, maybe empty but never null.
* @hide
*/
- public static ArrayList<TimeZone> getTimeZonesWithUniqueOffsets(String country) {
+ public static List<String> getTimeZoneIdsWithUniqueOffsets(String country) {
synchronized(sLastUniqueLockObj) {
if ((country != null) && country.equals(sLastUniqueCountry)) {
if (DBG) {
@@ -117,9 +93,9 @@ public class TimeUtils {
}
}
- Collection<TimeZone> zones = getTimeZones(country);
- ArrayList<TimeZone> uniqueTimeZones = new ArrayList<TimeZone>();
- for (TimeZone zone : zones) {
+ Collection<android.icu.util.TimeZone> zones = getIcuTimeZones(country);
+ ArrayList<android.icu.util.TimeZone> uniqueTimeZones = new ArrayList<>();
+ for (android.icu.util.TimeZone zone : zones) {
// See if we already have this offset,
// Using slow but space efficient and these are small.
boolean found = false;
@@ -129,7 +105,7 @@ public class TimeUtils {
break;
}
}
- if (found == false) {
+ if (!found) {
if (DBG) {
Log.d(TAG, "getTimeZonesWithUniqueOffsets: add unique offset=" +
zone.getRawOffset() + " zone.getID=" + zone.getID());
@@ -140,81 +116,43 @@ public class TimeUtils {
synchronized(sLastUniqueLockObj) {
// Cache the last result
- sLastUniqueZoneOffsets = uniqueTimeZones;
+ sLastUniqueZoneOffsets = extractZoneIds(uniqueTimeZones);
sLastUniqueCountry = country;
return sLastUniqueZoneOffsets;
}
}
+ private static List<String> extractZoneIds(List<android.icu.util.TimeZone> timeZones) {
+ List<String> ids = new ArrayList<>(timeZones.size());
+ for (android.icu.util.TimeZone timeZone : timeZones) {
+ ids.add(timeZone.getID());
+ }
+ return Collections.unmodifiableList(ids);
+ }
+
/**
- * Returns the time zones for the country, which is the code
- * attribute of the timezone element in time_zones_by_country.xml. Do not modify.
+ * Returns an immutable list of frozen ICU time zones for the country.
*
- * @param country is a two character country code.
- * @return TimeZone list, maybe empty but never null. Do not modify.
+ * @param countryIso is a two character country code.
+ * @return TimeZone list, maybe empty but never null.
* @hide
*/
- public static ArrayList<TimeZone> getTimeZones(String country) {
- synchronized (sLastLockObj) {
- if ((country != null) && country.equals(sLastCountry)) {
- if (DBG) Log.d(TAG, "getTimeZones(" + country + "): return cached version");
- return sLastZones;
- }
- }
-
- ArrayList<TimeZone> tzs = new ArrayList<TimeZone>();
-
- if (country == null) {
- if (DBG) Log.d(TAG, "getTimeZones(null): return empty list");
- return tzs;
+ private static List<android.icu.util.TimeZone> getIcuTimeZones(String countryIso) {
+ if (countryIso == null) {
+ if (DBG) Log.d(TAG, "getIcuTimeZones(null): return empty list");
+ return Collections.emptyList();
}
-
- Resources r = Resources.getSystem();
- XmlResourceParser parser = r.getXml(com.android.internal.R.xml.time_zones_by_country);
-
- try {
- XmlUtils.beginDocument(parser, "timezones");
-
- while (true) {
- XmlUtils.nextElement(parser);
-
- String element = parser.getName();
- if (element == null || !(element.equals("timezone"))) {
- break;
- }
-
- String code = parser.getAttributeValue(null, "code");
-
- if (country.equals(code)) {
- if (parser.next() == XmlPullParser.TEXT) {
- String zoneIdString = parser.getText();
- TimeZone tz = TimeZone.getTimeZone(zoneIdString);
- if (tz.getID().startsWith("GMT") == false) {
- // tz.getID doesn't start not "GMT" so its valid
- tzs.add(tz);
- if (DBG) {
- Log.d(TAG, "getTimeZone('" + country + "'): found tz.getID=="
- + ((tz != null) ? tz.getID() : "<no tz>"));
- }
- }
- }
- }
+ List<android.icu.util.TimeZone> timeZones =
+ TimeZoneFinder.getInstance().lookupTimeZonesByCountry(countryIso);
+ if (timeZones == null) {
+ if (DBG) {
+ Log.d(TAG, "getIcuTimeZones(" + countryIso
+ + "): returned null, converting to empty list");
}
- } catch (XmlPullParserException e) {
- Log.e(TAG, "Got xml parser exception getTimeZone('" + country + "'): e=", e);
- } catch (IOException e) {
- Log.e(TAG, "Got IO exception getTimeZone('" + country + "'): e=", e);
- } finally {
- parser.close();
- }
-
- synchronized(sLastLockObj) {
- // Cache the last result;
- sLastZones = tzs;
- sLastCountry = country;
- return sLastZones;
+ return Collections.emptyList();
}
+ return timeZones;
}
/**
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-22 01:42:59 +0000