用活动组内的另一个片段替换一个片段 [英] Replacing a fragment with another fragment inside activity group

问题描述

我在组活动中有一个片段，我想用另一个片段替换它:

I have a fragment inside a group activity and I want to replace it with another fragment:

FragmentTransaction ft = getActivity().getFragmentManager().beginTransaction();
SectionDescriptionFragment bdf = new SectionDescriptionFragment();
ft.replace(R.id.book_description_fragment, bdf);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
ft.addToBackStack(null);
ft.commit();

在不使用活动组的情况下作为单独的项目完成时它工作正常，当控件进入 getview() 时，在 log cat 中一切正常，但没有视图可见，甚至没有出现任何异常，我想要这本书详细信息片段将被部分详细信息片段替换.

It works fine when it is done as a seperate project without using activity group, every thing works fine in log cat as control goes inside getview(), but no view is visible, not even any exception arises, I want the book detail fragment to be replaced by section detail fragment.

书籍详细信息片段的 XML 具有 id book_description_fragment，部分描述片段的 xml 具有 id section_description_fragment.

Xml of book detail fragment has id book_description_fragment and xml for section description fragment has id section_description_fragment.

上面的代码是在一个项目的 onClick 方法中，我希望当用户在水平滚动视图中点击一个项目时，片段会发生变化.

The above code is in onClick method of an item, I want that when user taps on an item in horizontal scroll view, then the fragment changes.

推荐答案

在 XML 中硬编码的片段，无法替换. 如果您需要将一个片段替换为另一个片段，您应该添加首先，它们是动态的.

Fragments that are hard coded in XML, cannot be replaced. If you need to replace a fragment with another, you should have added them dynamically, first of all.

注意:R.id.fragment_container 是您在要将片段带到的活动中选择的布局或容器.

Note: R.id.fragment_container is a layout or container of your choice in the activity you are bringing the fragment to.

// Create new fragment and transaction
Fragment newFragment = new ExampleFragment();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();

// Replace whatever is in the fragment_container view with this fragment,
// and add the transaction to the back stack if needed
transaction.replace(R.id.fragment_container, newFragment);
transaction.addToBackStack(null);

// Commit the transaction
transaction.commit();

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