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 [email protected] To unsubscribe from this group, send email to [email protected] 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
