Redisplay a hidden button after it entered the screen again.

    static final private int ANIMATION_OUT = 2;

    private static int sLastClickedIndex = NOT_AN_INDEX;

    private static String sLastClickedWordlistId = null;

    private final OnWordListPreferenceClick mPreferenceClickHandler =

            new OnWordListPreferenceClick();

    private final OnActionButtonClick mActionButtonClickHandler =

        ((ViewGroup)view).setLayoutTransition(null);

        final Button button = (Button)view.findViewById(R.id.wordlist_button);

        button.setText(getButtonLabel(mStatus));

        button.setVisibility(View.INVISIBLE);

        // String identity match. This is an ==, not an .equals, on purpose.

        button.setVisibility(mWordlistId == sLastClickedWordlistId ? View.VISIBLE : View.INVISIBLE);

        button.setOnClickListener(mActionButtonClickHandler);

        view.setOnClickListener(mPreferenceClickHandler);

    }

                animateButton(getButtonForIndex(listView, sLastClickedIndex), ANIMATION_OUT);

            }

            sLastClickedIndex = myIndex;

            sLastClickedWordlistId = mWordlistId;

        }

    }