Java.lang.IllegalStateException Activity has been destroyed

03-04 12:01:05.468: E/AndroidRuntime(2474): FATAL EXCEPTION: main
java.lang.IllegalStateException: Activity has been destroyed
at android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1345)
at android.app.BackStackRecord.commitInternal(BackStackRecord.java:597)
at android.app.BackStackRecord.commitAllowingStateLoss(BackStackRecord.java:579)
at android.support.v13.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:143)
at android.support.v4.view.ViewPager.dataSetChanged(ViewPager.java:892)

bug出现的原理问题及解决方法是
This seems to be a bug in the newly added support for nested fragments. Basically, the child FragmentManager ends up with a broken internal state when it is detached from the activity. A short-term workaround that fixed it for me is to add the following to onDetach() of every Fragment which you call getChildFragmentManager() on:

解决方法重写onDetach()

@Override
public void onDetach() {
super.onDetach();

try {
Field childFragmentManager = Fragment.class.getDeclaredField("mChildFragmentManager");
childFragmentManager.setAccessible(true);
childFragmentManager.set(this, null);

} catch (NoSuchFieldException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}

问题解决方法是参考文章：http://stackoverflow.com/questions/15207305/getting-the-error-java-lang-illegalstateexception-activity-has-been-destroyed