/** Called when a menu item is selected. */ @Override public boolean onOptionsItemSelected(MenuItem item) { super.onOptionsItemSelected(item); switch (item.getItemId()) { case MEN_NEXT_PAGE: { nextPage(); break; } case MEN_PREV_PAGE: { prevPage(); break; } case MEN_GOTO_PAGE: { gotoPage(); break; } case MEN_ZOOM_IN: { zoomIn(); break; } case MEN_ZOOM_OUT: { zoomOut(); break; } case MEN_BACK: { finish(); break; } case MEN_CLEANUP: { HardReference.cleanup(); break; } } return true; }