@Override
public void onPreferenceVisibilityChange(Preference preference) {
if (preference.isVisible()) {
// The preference has become visible, we need to add it in the correct location.
// Index (inferred) in mPreferenceList of the item preceding the newly visible pref
int previousVisibleIndex = -1;
for (final Preference pref : mPreferenceListInternal) {
if (preference.equals(pref)) {
break;
}
if (pref.isVisible()) {
previousVisibleIndex++;
}
}
// Insert this preference into the active list just after the previous visible entry
mPreferenceList.add(previousVisibleIndex + 1, preference);
notifyItemInserted(previousVisibleIndex + 1);
} else {
// The preference has become invisibile. Find it in the list and remove it.
int removalIndex;
final int listSize = mPreferenceList.size();
for (removalIndex = 0; removalIndex < listSize; removalIndex++) {
if (preference.equals(mPreferenceList.get(removalIndex))) {
break;
}
}
mPreferenceList.remove(removalIndex);
notifyItemRemoved(removalIndex);
}
}
private void syncMyPreferences() {
synchronized (this) {
if (mIsSyncing) {
return;
}
mIsSyncing = true;
}
List<Preference> newPreferenceList = new ArrayList<>(mPreferenceListInternal.size());
flattenPreferenceGroup(newPreferenceList, mPreferenceGroup);
mPreferenceListInternal = newPreferenceList;
mPreferenceList = new ArrayList<>(mPreferenceListInternal.size());
// Copy only the visible preferences to the active list
for (final Preference preference : mPreferenceListInternal) {
if (preference.isVisible()) {
mPreferenceList.add(preference);
}
}
notifyDataSetChanged();
synchronized (this) {
mIsSyncing = false;
notifyAll();
}
}
