On Sunday, December 21, 2014 6:15:44 AM UTC+3, Doug Gordon wrote: > > SOLVED! After tracing the execution through ViewPager and > FragmentPagerAdapter and trying to explain the very strange behavior I was > seeing, I eventually discovered that when I wrote my fragments extending > Fragment and ListFragment a long time ago, I had added a getView() method > that was (inadvertently) overriding the method by that name in the > superclass and was returning the wrong view for what the ViewPager was > expecting. I removed these methods and everything started working. > > The only explanation I have for why this code was working OK with the > native fragments is that I noticed that the support.v4 fragments enclose > the fragment's actual root view as returned by onCreateView with some sort > of FrameLayout that they create, and that is what getView returns. The > native fragments apparently do not do this, so the view returned by my > getView method worked correctly. > > The only odd thing, and I am not a Java expert, is that I did not precede > my getView with @Override and did not notice any error or warning about > that. Isn't this required? I know that when I wrote that code that I was > not intending to override the superclass. >
@Override is not required. It's for flagging a method that you intend to be an override -- and if it really isn't (no matching method in a base class / interface), then the compiler will flag it with an error. Useful to detect a situation when someone makes a change to a base class or interface (potentially a few hierarchy levels up), maybe adding a parameter, that sort of thing -- and your class' method suddenly doesn't override what it's supposed to, breaking at runtime. Personally, I find it very useful to use Eclipse's "auto-format when saving", with the setting that automatically adds any missing @Override annotations. -- K -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
