lineage-sdk self-removing prefs: move reap from onBindViewHolder to onAttached

*) Eliminates visibility of the pref removal. You could previously
   see vertical movement of text during initial display of replaced
   prefs.

*) In addition, when reaping, use setVisible(false) instead of
   removePreference.  Otherwise, array out of bounds index exceptions
   occur in frameworks pref support libraries (as a result of moving
   from onBindViewHolder to onAttached).

Change-Id: I1a0045552572a590f89715f8d94156eddaaec469

sdk/src/java/lineageos/preference/ConstraintsHelper.java

@@ -300,7 +300,7 @@ public class ConstraintsHelper {
         return fallbackAttr;
     }
 
-    public void onBindViewHolder(PreferenceViewHolder holder) {
+    public void onAttached() {
         checkIntent();
 
         if (isAvailable() && mReplacesKey != null) {
@@ -308,7 +308,9 @@ public class ConstraintsHelper {
         }
 
         Graveyard.get(mContext).summonReaper(mPref.getPreferenceManager());
+    }
 
+    public void onBindViewHolder(PreferenceViewHolder holder) {
         if (!isAvailable()) {
             return;
         }
@@ -325,7 +327,7 @@ public class ConstraintsHelper {
      * If we want to keep this at the preference level vs the fragment level, we need to
      * collate all the preferences that need to be removed when attached to the
      * hierarchy, then purge them all when loading is complete. The Graveyard keeps track
-     * of this, and will reap the dead during the first call to onBindViewHolder.
+     * of this, and will reap the dead when onAttached is called.
      */
     private static class Graveyard {
 
@@ -370,20 +372,12 @@ public class ConstraintsHelper {
             return null;
         }
 
-        private void removePreference(PreferenceManager mgr, Preference pref) {
-            final PreferenceGroup group = getParent(pref, pref);
-            group.removePreference(pref);
-            if (group.getPreferenceCount() == 0) {
-                getParent(pref, group).removePreference(group);
-            }
-        }
-
         public void summonReaper(PreferenceManager mgr) {
             synchronized (mDeathRow) {
                 for (String dead : mDeathRow) {
                     Preference deadPref = mgr.findPreference(dead);
                     if (deadPref != null) {
-                        removePreference(mgr, deadPref);
+                        deadPref.setVisible(false);
                     }
                 }
                 mDeathRow.clear();

sdk/src/java/lineageos/preference/SelfRemovingDropDownPreference.java

@@ -43,6 +43,12 @@ public class SelfRemovingDropDownPreference extends DropDownPreference {
         mConstraints = new ConstraintsHelper(context, null, this);
     }
 
+    @Override
+    public void onAttached() {
+        super.onAttached();
+        mConstraints.onAttached();
+    }
+
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
         super.onBindViewHolder(holder);

sdk/src/java/lineageos/preference/SelfRemovingListPreference.java

@@ -43,6 +43,12 @@ public class SelfRemovingListPreference extends ListPreference {
         mConstraints = new ConstraintsHelper(context, null, this);
     }
 
+    @Override
+    public void onAttached() {
+        super.onAttached();
+        mConstraints.onAttached();
+    }
+
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
         super.onBindViewHolder(holder);

sdk/src/java/lineageos/preference/SelfRemovingPreference.java

@@ -48,6 +48,12 @@ public class SelfRemovingPreference extends Preference {
         this(context, null);
     }
 
+    @Override
+    public void onAttached() {
+        super.onAttached();
+        mConstraints.onAttached();
+    }
+
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
         super.onBindViewHolder(holder);

sdk/src/java/lineageos/preference/SelfRemovingSwitchPreference.java

@@ -43,6 +43,12 @@ public class SelfRemovingSwitchPreference extends SwitchPreference {
         mConstraints = new ConstraintsHelper(context, null, this);
     }
 
+    @Override
+    public void onAttached() {
+        super.onAttached();
+        mConstraints.onAttached();
+    }
+
     @Override
     public void onBindViewHolder(PreferenceViewHolder holder) {
         super.onBindViewHolder(holder);