父片段不显示儿童ViewPager [英] Parent Fragment Not Displaying Child ViewPager
问题描述
我使用采用了Android兼容包与API级别10.我有一个FragmentActivity，并在其onCreate方法，我动态添加一个新创建的片段实例（myPagerFragment）：
I am using the Android Compatibility Package with API Level 10. I have a FragmentActivity and in its onCreate method, I dynamically add a newly created Fragment instance (myPagerFragment) using:
getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, myPagerFragment).commit();
该myPagerFragment包含ViewPager这使得使用FragmentPagerAdapter的。执行是根据与没有什么特别的Android文档。当在ViewPager子片段中的一个按钮被点击，则myPagerFragment将使用移除并以新的片段的实例（myOtherFragment）代替：
The myPagerFragment contains a ViewPager which makes use of a FragmentPagerAdapter. The implementation is according to the Android documentation with nothing special. When a button in one of the ViewPager child Fragments is clicked, then the myPagerFragment will be removed and replaced by a new Fragment instance (myOtherFragment) using:
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.setCustomAnimations(android.R.anim.fade_in, android.R.anim.fade_out);
ft.replace(R.id.fragment_container, myOtherFragment).commit();
该myOtherFragment显示包含一个按钮，一个简单的观点。点击该按钮，然后myOtherFragment将被删除，并使用与myPagerFragment的新实例更换一次：
The myOtherFragment displays a simple view containing a button. When this button is clicked, then the myOtherFragment will be removed and replaced again with a new instance of myPagerFragment using:
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.setCustomAnimations(android.R.anim.fade_in, android.R.anim.fade_out);
ft.replace(R.id.fragment_container, myPagerFragment).commit();
在这一点上myPagerFragment不再显示，因为它在一开始做，但相反，显示空白屏幕。有没有崩溃，没有什么有用的在日志中。
At this point the myPagerFragment no longer displays as it did in the beginning, but instead, displays a blank screen. There is no crash and nothing useful in the log.
我已经试过这种方法与其他意见，例如，与包含一个简单的视图定义一个片段取代myPagerFragment，这正常工作和预期。这仅仅是包含ViewPager，即在连续负载显示不正确的片段。
I have tried this method with other views, for instance, replacing myPagerFragment with a Fragment that contains a simple view definition, and this works correctly and as expected. It is only Fragments that contain a ViewPager, that displays incorrectly at successive loads.
我如何可以使包含ViewPager片段总是正确显示？
How can I make Fragments that contain a ViewPager to always display correctly?
推荐答案
您在片段不能嵌套片段。因此，你不能在片段 FragmentPagerAdapter 在 ViewPager C>。请重新设计的用户界面解决这个矛盾，如摆脱的最外层片段。
You cannot nest fragments in fragments. Hence, you cannot put a FragmentPagerAdapter in a ViewPager in a Fragment. Please redesign your UI to resolve this conflict, such as by getting rid of the outer-most Fragment.
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