Fall back to persist.sys.language/country if locale isn't set.

This will prevent users from losing their language setting when they
take an OTA to M.

bug: 23021286
Change-Id: Ifb66f6bf6a940ab745edac709321f3009ec6eab4

1 files changed, 18 insertions, 0 deletions

diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index eb02199..bd72860 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -95,6 +95,7 @@ import com.android.server.wm.WindowManagerService;
 import dalvik.system.VMRuntime;
 
 import java.io.File;
+import java.util.Locale;
 import java.util.Timer;
 import java.util.TimerTask;
 
@@ -182,6 +183,23 @@ public final class SystemServer {
             SystemClock.setCurrentTimeMillis(EARLIEST_SUPPORTED_TIME);
         }
 
+        // If the system has "persist.sys.language" and friends set, replace them with
+        // "persist.sys.locale". Note that the default locale at this point is calculated
+        // using the "-Duser.locale" command line flag. That flag is usually populated by
+        // AndroidRuntime using the same set of system properties, but only the system_server
+        // and system apps are allowed to set them.
+        //
+        // NOTE: Most changes made here will need an equivalent change to
+        // core/jni/AndroidRuntime.cpp
+        if (!SystemProperties.get("persist.sys.language").isEmpty()) {
+            final String languageTag = Locale.getDefault().toLanguageTag();
+
+            SystemProperties.set("persist.sys.locale", languageTag);
+            SystemProperties.set("persist.sys.language", "");
+            SystemProperties.set("persist.sys.country", "");
+            SystemProperties.set("persist.sys.localevar", "");
+        }
+
         // Here we go!
         Slog.i(TAG, "Entered the Android system server!");
         EventLog.writeEvent(EventLogTags.BOOT_PROGRESS_SYSTEM_RUN, SystemClock.uptimeMillis());