Try to avoid subclassing the Application class. Just use static variables. Initialize them to null/0/whatever and check them in the onCreate of your activity. If these are null/0/ whatever, initialize these static variable properly and continue. But re-initializing them *won't maintain* state. After you process has been killed, your state is reset. You can use static variables to share state between multiple activities in your app (as long as they're started in the same process).
If you want to maintain state over configuration changes (e.g. slide out keyboard, orientation changes), use the activity's onRetainNonConfigurationInstance method. If you want to maintain state even if your process has been killed, use the activity's onSaveInstanceState method (and related methods). On Mar 9, 5:59 am, miguelo <[email protected]> wrote: > Hi, thanks for your help. I have read about how to save and restore > the status of an activity (onSavedInstanceState(), > onRestoreInstanceState(), ...) > > My problem is I'm extending the android.app.Application class, which > is a "base class for those who need to maintain global application > state" and I'm using it to maintain some global data (user logged in, > DB helper, ...). These are the data I'm losing if I leave my > application opened and after a few hours I return to it. I'm able to > restore the specific data of the running activity but not these global > data. > > I don't know if I'm using a bad practice (and in that case which is > the recommended approach to store global application state), and if > that's the correct place to do it, how can I save/restore those data > when my process is killed/restarted. > > Thanks, > > Miguel > > On 8 mar, 17:22, TreKing <[email protected]> wrote: > ... > > > Did you readed about onSavedInstanceState and onRestoreInstanceState ? > > ... -- 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
