public void showLastRead() {
   int num = prefsManager.getLastnum();
   float per = prefsManager.getLastPer();
   currentPageNo = num;
   String path = book.getFlatNavPoints().get(currentPageNo - 1).getContent().getPath();
   content.loadContent(path, per);
   chapter.startAnimation(chapterLeftOut);
 }
 private void showChapterAnimation() {
   chapter.startAnimation(chapterLeftIn);
 }
 public void showPage(int number) {
   currentPageNo = number;
   String path = book.getFlatNavPoints().get(currentPageNo - 1).getContent().getPath();
   content.loadContent(path, 0);
   chapter.startAnimation(chapterLeftOut);
 }