Merge "Implement locale matching in LocalesList." (7ed26b10) · Commits · e / os / android_frameworks_base

api/current.txt

+1 −1

Original line number	Diff line number	Diff line
		@@ -38701,9 +38701,9 @@ package android.util {
		method public int describeContents();
		method public static android.util.LocaleList forLanguageTags(java.lang.String);
		method public java.util.Locale get(int);
		method public java.util.Locale getBestMatch(java.lang.String[]);
		method public static android.util.LocaleList getDefault();
		method public static android.util.LocaleList getEmptyLocaleList();
		method public java.util.Locale getFirstMatch(java.lang.String[]);
		method public java.util.Locale getPrimary();
		method public boolean isEmpty();
		method public int size();

api/system-current.txt

+1 −1

Original line number	Diff line number	Diff line
		@@ -41034,9 +41034,9 @@ package android.util {
		method public int describeContents();
		method public static android.util.LocaleList forLanguageTags(java.lang.String);
		method public java.util.Locale get(int);
		method public java.util.Locale getBestMatch(java.lang.String[]);
		method public static android.util.LocaleList getDefault();
		method public static android.util.LocaleList getEmptyLocaleList();
		method public java.util.Locale getFirstMatch(java.lang.String[]);
		method public java.util.Locale getPrimary();
		method public boolean isEmpty();
		method public int size();

core/java/android/util/LocaleList.java

+60 −3

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@ package android.util;
		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.annotation.Size;
		import android.icu.util.ULocale;
		import android.os.Parcel;
		import android.os.Parcelable;

		@@ -208,10 +209,66 @@ public final class LocaleList implements Parcelable {
		}
		}

		private static String getLikelyScript(Locale locale) {
		final String script = locale.getScript();
		if (!script.isEmpty()) {
		return script;
		} else {
		// TODO: Cache the results if this proves to be too slow
		return ULocale.addLikelySubtags(ULocale.forLocale(locale)).getScript();
		}
		}

		private static int matchScore(Locale supported, Locale desired) {
		if (supported.equals(desired)) {
		return 1; // return early so we don't do unnecessary computation
		}
		if (!supported.getLanguage().equals(desired.getLanguage())) {
		return 0;
		}
		// There is no match if the two locales use different scripts. This will most imporantly
		// take care of traditional vs simplified Chinese.
		final String supportedScr = getLikelyScript(supported);
		final String desiredScr = getLikelyScript(desired);
		return supportedScr.equals(desiredScr) ? 1 : 0;
		}

		/**
		* Returns the first match in the locale list given an unordered array of supported locales
		* in BCP47 format.
		*
		* If the locale list is empty, null would be returned.
		*/
		@Nullable
		public Locale getBestMatch(String[] locales) {
		// TODO: Fix this to actually do locale negotiation and choose the best match
		return getPrimary();
		public Locale getFirstMatch(String[] supportedLocales) {
		if (mList.length == 1) { // just one locale, perhaps the most common scenario
		return mList[0];
		}
		if (mList.length == 0) { // empty locale list
		return null;
		}
		// TODO: Figure out what to if en-XA or ar-XB are in the locale list
		int bestIndex = Integer.MAX_VALUE;
		for (String tag : supportedLocales) {
		final Locale supportedLocale = Locale.forLanguageTag(tag);
		// We expect the average length of locale lists used for locale resolution to be
		// smaller than three, so it's OK to do this as an O(mn) algorithm.
		for (int idx = 0; idx < mList.length; idx++) {
		final int score = matchScore(supportedLocale, mList[idx]);
		if (score > 0) {
		if (idx == 0) { // We have a match on the first locale, which is good enough
		return mList[0];
		} else if (idx < bestIndex) {
		bestIndex = idx;
		}
		}
		}
		}
		if (bestIndex == Integer.MAX_VALUE) { // no match was found
		return mList[0];
		} else {
		return mList[bestIndex];
		}
		}

		private final static Object sLock = new Object();

services/core/java/com/android/server/am/ActivityManagerService.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -17901,7 +17901,7 @@ public final class ActivityManagerService extends ActivityManagerNative
		if (mSupportedSystemLocales == null) {
		mSupportedSystemLocales = Resources.getSystem().getAssets().getLocales();
		}
		final Locale locale = values.getLocales().getBestMatch(mSupportedSystemLocales);
		final Locale locale = values.getLocales().getFirstMatch(mSupportedSystemLocales);
		SystemProperties.set("persist.sys.locale", locale.toLanguageTag());
		mHandler.sendMessage(mHandler.obtainMessage(SEND_LOCALE_TO_MOUNT_DAEMON_MSG,
		locale));