Made changes to padlock support for preferences.

- Currently, if a preference is disabled by admin, we add a padlock and disable
the preference. And now if the preference is enabled in some other place, the
padlock is not removed. Updated RestrictedPreference to fix this
behavior.
- Made RestrictedPreferenceHelper and
RestrictedPreferenceHelper.onAttachedToHierarchy public so that preferences in
Settings can use these.
- Put a check for null to avoid NullPointerException.
- Removed a redundant statement.

Change-Id: Ie88a761dc38c58a680c62b3703d2081c67462079

1 files changed, 9 insertions, 0 deletions

diff --git a/packages/SettingsLib/src/com/android/settingslib/RestrictedSwitchPreference.java b/packages/SettingsLib/src/com/android/settingslib/RestrictedSwitchPreference.java
index 308477b0c84b..84e2bff4fc40 100644
--- a/packages/SettingsLib/src/com/android/settingslib/RestrictedSwitchPreference.java
+++ b/packages/SettingsLib/src/com/android/settingslib/RestrictedSwitchPreference.java
@@ -79,6 +79,15 @@ public class RestrictedSwitchPreference extends SwitchPreference {
         mHelper.checkRestrictionAndSetDisabled(userRestriction, userId);
     }
 
+    @Override
+    public void setEnabled(boolean enabled) {
+        if (enabled && isDisabledByAdmin()) {
+            mHelper.setDisabledByAdmin(null);
+            return;
+        }
+        super.setEnabled(enabled);
+    }
+
     public void setDisabledByAdmin(EnforcedAdmin admin) {
         if (mHelper.setDisabledByAdmin(admin)) {
             notifyChanged();