FragmentTransaction.replace（）不工作 [英] FragmentTransaction.replace() not working

问题描述

我有一个 ListFragment 显示了由用户创建的项目清单。我有一个的ListView 与它的ID设置为@android：ID /列表和的TextView id为 @android：ID /空。

I have a ListFragment displaying a list of items that created by the user. I have a ListView with it's id set to "@android:id/list" and a TextView with the id "@android:id/empty".

我有一个操作栏按钮显示的片段，以允许用户对所述列表中创建更多的条目。这里是 onOptionsItemSelected（）方法：

I have an action bar button to display a fragment to allow the user to create more entries for the list. Here is the onOptionsItemSelected() method:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    Fragment frag = null;

    // Right now I only have code for the addCourse() fragment, will add more soon
    switch (item.getItemId()) {
    case R.id.addCourse:
        frag = new AddCourseFragment();
        break;
    default:
        return super.onOptionsItemSelected(item);
    }

    // The support library is being dumb and replace isn't actually 
    getFragmentManager().beginTransaction()
        .remove(this).add(getId(), frag).addToBackStack(null).commit();
    return true;

}

在AddCourseFragment code是如下：

The AddCourseFragment code is as follows:

public class AddCourseFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_addcourse, container, false);
//      if (view.findViewById(R.id.timesFrame)!=null) {
        Fragment timesFrag = new TimesFragment();
        getChildFragmentManager().beginTransaction()
            .add(R.id.timesFrame, timesFrag).commit();
//      }
    return view;
    }
}

正如预期的那样，当列表被填充，机器人展示了的TextView 的文本。然后我打的过程中添加按钮，出现这种情况：
它显示了空文本，以及新的片段。

As expected, when the list is unpopulated, android shows the text in the TextView. I then hit the add course button and this happens:
It shows the empty text as well as the new fragment.

推荐答案

我也有类似的问题。

根据此当你需要添加片段编程，你应该将它们添加到现有的的ViewGroup 。

According to this when you need to add Fragments programmatically, you should add them to an existing ViewGroup.

所以，我辗转于替换片段从XML和使用的FrameLayout 组件（）方法。

So I removed the Fragment from the xml and used FrameLayout component in the replace() method.

您还可以看看<一href="http://stackoverflow.com/questions/5293850/fragment-duplication-on-fragment-transaction">here.

希望这有助于。

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