If the app is killed, the next time the user returns to it only the visible activities at that point will be re-started; not the entire activity stack.
On Fri, Aug 6, 2010 at 4:48 AM, Michael A. <[email protected]> wrote: > I am seeing a lot of NullPointerException in my code at the moment > from public static variables. > > I use these variables to store, e.g., my image library (used in > Activities throughout my code). All of them are initialized in the > OnCreate of my apps Base activity, and I check that they are > initialized in OnResume just to be certain (and initialize them if > they have somehow become nulled). > > // Main APP Activity > MainActivity { > public static GlobalObject lib; > > void OnCreate() { > if (lib == null) > lib = new GlobalObject(); > } > > void OnResume() { > if (lib == null) > lib = new GlobalObject(); > } > > } > > // Some other activity instantiated later > OtherActivity { > void onCreate() { > lib.doSomething(); // This line will sometimes fail with a > NullPointerException > } > > } > > I am quite unable to recreate the situation in which this > NullPointerException occurs. As I understand the activity lifecycle, > it should not be possible for lib to be null when OtherActivity is > created (if OtherActivity is in memory, MainActivity's static > variables should also be in memory and if the app is killed, it should > start over from MainActivity?), but that is the error I seem to be > getting. > > Suggestions, anyone? I suppose I am probably overlooking something > simple, but I just can't see it. > > Regards, > > Michael A. > > -- > 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]<android-developers%[email protected]> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- Dianne Hackborn Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. -- 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
