public void addBookToRecentList(Book book) {
final List<Long> ids = myDatabase.loadRecentBookIds();
final Long bookId = book.getId();
ids.remove(bookId);
ids.add(0, bookId);
if (ids.size() > 12) {
ids.remove(12);
}
myDatabase.saveRecentBookIds(ids);
}
private List<Book> books(List<Long> ids) {
final List<Book> bookList = new ArrayList<Book>(ids.size());
for (long id : ids) {
final Book book = getBookById(id);
if (book != null) {
bookList.add(book);
}
}
return bookList;
}
public Book getRecentBook(int index) {
List<Long> recentIds = myDatabase.loadRecentBookIds();
return recentIds.size() > index ? getBookById(recentIds.get(index)) : null;
}