@Override
  public void onAttachFragment(Fragment fragment) {
    // This method can be called before onCreate(), at which point we cannot rely on ViewPager.
    // In that case, we will setup the "current position" soon after the ViewPager is ready.
    final int currentPosition = mViewPager != null ? mViewPager.getCurrentItem() : -1;

    if (fragment instanceof DialpadFragment) {
      mDialpadFragment = (DialpadFragment) fragment;
      mDialpadFragment.setListener(mDialpadListener);
      if (currentPosition == TAB_INDEX_DIALER) {
        mDialpadFragment.onVisibilityChanged(true);
      }
    } else if (fragment instanceof CallLogFragment) {
      mCallLogFragment = (CallLogFragment) fragment;
      if (currentPosition == TAB_INDEX_CALL_LOG) {
        mCallLogFragment.onVisibilityChanged(true);
      }
    } else if (fragment instanceof PhoneFavoriteFragment) {
      mPhoneFavoriteFragment = (PhoneFavoriteFragment) fragment;
      mPhoneFavoriteFragment.setListener(mPhoneFavoriteListener);
      if (mContactListFilterController != null
          && mContactListFilterController.getFilter() != null) {
        mPhoneFavoriteFragment.setFilter(mContactListFilterController.getFilter());
      }
    } else if (fragment instanceof PhoneNumberPickerFragment) {
      mSearchFragment = (PhoneNumberPickerFragment) fragment;
      mSearchFragment.setOnPhoneNumberPickerActionListener(mPhoneNumberPickerActionListener);
      mSearchFragment.setQuickContactEnabled(true);
      mSearchFragment.setDarkTheme(true);
      mSearchFragment.setPhotoPosition(ContactListItemView.PhotoPosition.LEFT);
      if (mContactListFilterController != null
          && mContactListFilterController.getFilter() != null) {
        mSearchFragment.setFilter(mContactListFilterController.getFilter());
      }
      // Here we assume that we're not on the search mode, so let's hide the fragment.
      //
      // We get here either when the fragment is created (normal case), or after configuration
      // changes.  In the former case, we're not in search mode because we can only
      // enter search mode if the fragment is created.  (see enterSearchUi())
      // In the latter case we're not in search mode either because we don't retain
      // mInSearchUi -- ideally we should but at this point it's not supported.
      mSearchFragment.setUserVisibleHint(false);
      // After configuration changes fragments will forget their "hidden" state, so make
      // sure to hide it.
      if (!mSearchFragment.isHidden()) {
        final FragmentTransaction transaction = getFragmentManager().beginTransaction();
        transaction.hide(mSearchFragment);
        transaction.commitAllowingStateLoss();
      }
    }
  }
  @Override
  public void onStart() {
    super.onStart();
    if (mPhoneFavoriteFragment != null) {
      mPhoneFavoriteFragment.setFilter(mContactListFilterController.getFilter());
    }
    if (mSearchFragment != null) {
      mSearchFragment.setFilter(mContactListFilterController.getFilter());
    }

    if (mDuringSwipe || mUserTabClick) {
      if (DEBUG) Log.d(TAG, "reset buggy flag state..");
      mDuringSwipe = false;
      mUserTabClick = false;
    }
  }