The dynamic index implementation for time zone preferences.

Disable the region settings page if auto time zone is enabled.

Fixes: 146849126
Test: manual
Change-Id: Icce1e5aca14539d6c9149e05a3321429bd337f17

src/com/android/settings/datetime/timezone/TimeZoneSettings.java

@@ -25,6 +25,7 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.icu.util.TimeZone;
 import android.os.Bundle;
+import android.provider.Settings;
 import android.util.Log;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -123,9 +124,9 @@ public class TimeZoneSettings extends DashboardFragment {
         super.onCreate(icicle);
         // Hide all interactive preferences
         setPreferenceCategoryVisible((PreferenceCategory) findPreference(
-            PREF_KEY_REGION_CATEGORY), false);
+                PREF_KEY_REGION_CATEGORY), false);
         setPreferenceCategoryVisible((PreferenceCategory) findPreference(
-            PREF_KEY_FIXED_OFFSET_CATEGORY), false);
+                PREF_KEY_FIXED_OFFSET_CATEGORY), false);
 
         // Start loading TimeZoneData
         getLoaderManager().initLoader(0, null, new TimeZoneDataLoader.LoaderCreator(
@@ -237,7 +238,7 @@ public class TimeZoneSettings extends DashboardFragment {
         String tzId = data.getStringExtra(RegionZonePicker.EXTRA_RESULT_TIME_ZONE_ID);
         // Ignore the result if user didn't change the region or time zone.
         if (Objects.equals(regionId, use(RegionPreferenceController.class).getRegionId())
-            && Objects.equals(tzId, mSelectedTimeZoneId)) {
+                && Objects.equals(tzId, mSelectedTimeZoneId)) {
             return;
         }
 
@@ -327,9 +328,9 @@ public class TimeZoneSettings extends DashboardFragment {
     private void setSelectByRegion(boolean selectByRegion) {
         mSelectByRegion = selectByRegion;
         setPreferenceCategoryVisible((PreferenceCategory) findPreference(
-            PREF_KEY_REGION_CATEGORY), selectByRegion);
+                PREF_KEY_REGION_CATEGORY), selectByRegion);
         setPreferenceCategoryVisible((PreferenceCategory) findPreference(
-            PREF_KEY_FIXED_OFFSET_CATEGORY), !selectByRegion);
+                PREF_KEY_FIXED_OFFSET_CATEGORY), !selectByRegion);
         final String localeRegionId = getLocaleRegionId();
         final Set<String> allCountryIsoCodes = mTimeZoneData.getRegionIds();
 
@@ -353,6 +354,7 @@ public class TimeZoneSettings extends DashboardFragment {
      * Find the a region associated with the specified time zone, based on the time zone data.
      * If there are multiple regions associated with the given time zone, the priority will be given
      * to the region the user last picked and the country in user's locale.
+     *
      * @return null if no region associated with the time zone
      */
     private String findRegionIdForTzId(String tzId) {
@@ -378,7 +380,7 @@ public class TimeZoneSettings extends DashboardFragment {
     }
 
     private void setPreferenceCategoryVisible(PreferenceCategory category,
-        boolean isVisible) {
+            boolean isVisible) {
         // Hiding category doesn't hide all the children preference. Set visibility of its children.
         // Do not care grandchildren as time_zone_pref.xml has only 2 levels.
         category.setVisible(isVisible);
@@ -392,5 +394,13 @@ public class TimeZoneSettings extends DashboardFragment {
     }
 
     public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
-            new BaseSearchIndexProvider(R.xml.time_zone_prefs);
+            new BaseSearchIndexProvider(R.xml.time_zone_prefs) {
+                @Override
+                protected boolean isPageSearchEnabled(Context context) {
+                    // We can't enter this page if the auto time zone is enabled.
+                    final int autoTimeZone = Settings.Global.getInt(context.getContentResolver(),
+                            Settings.Global.AUTO_TIME_ZONE, 1);
+                    return autoTimeZone == 1 ? false : true;
+                }
+            };
 }