android - 方法 openFragmentTransaction() 未定义类型 new ActionBar.OnNavigationListener(){}

Question

当我提到 Android Developers 时链接制作下拉列表，我在 Eclipse 中遇到错误:

The method openFragmentTransaction() is undefined for the type new ActionBar.OnNavigationListener(){}

这是网站给出的示例代码段(迄今为止):

mOnNavigationListener = new OnNavigationListener() {
  String[] strings = getResources().getStringArray(R.array.action_list);

  @Override
  public boolean onNavigationItemSelected(int position, long itemId) {

    ListContentFragment newFragment = new ListContentFragment();
    FragmentTransaction ft = openFragmentTransaction(); //<--ERROR HERE

    ft.replace(R.id.fragment_container, newFragment, strings[position]);
    // Apply changes
    ft.commit();
    return true;
  }
};

问题是，我不知道这个方法是从哪里来的？我的主要 Activity 类是 SherlockFragmentActivity，我从 android.support.v4.app.FragmentTransaction 导入。按“ctrl+shift+o”无济于事。有人可以指出解决方案吗？

Answer 1

我想我找到了答案。只是改变

FragmentTransaction ft = openFragmentTransaction();

到

FragmentTransaction ft = getSupportFragmentManager().beginTransaction();