BookListActivity.java 文件源码

/**
 * Hide list, show details and instruct the details view to show the selected book.
 */
@Override
public void showDetails(Book book, Drawable thumb) {
  final FragmentManager fragmentManager = getFragmentManager();
  FragmentTransaction ft = fragmentManager.beginTransaction();
  BookDetailsFragment details = (BookDetailsFragment) fragmentManager.findFragmentById(R.id.book_details);

  if (book != null) {
    // If null passed, we only configure fragment transaction here.
    details.showDetails(book, thumb);
  }

  ft.show(details);
  ft.hide(fragmentManager.findFragmentById(R.id.book_list));
  ft.addToBackStack("details"); // Use the back button to return to the search list view.

  ft.commit();
}