On Wed, Sep 29, 2010 at 8:45 PM, sujith <[email protected]> wrote:
> so what is the exact purpose of these three?? > SharedPreferences are for simple persistent settings storage. Like the home page on a Browser that should be available every time the user opens the app. These are just key->value pairs designed to hold simple things. Bundle is a way of storing data to either pass to another Context (another Activity, Service, etc) or to save and restore your own current state in onSaveInstanceState and onRestoreInstance state. This data is NOT persistent and used while the application is in use. onRetainNonConfigurationInstance() is useful for keeping an object reference alive while the system kills and restores your Activity during an orientation change. This is useful for objects that are expensive to construct or shouldn't be kill and restarted (things like AsyncTasks), where using a Bundle would not make sense. Hope that helps. ------------------------------------------------------------------------------------------------- TreKing <http://sites.google.com/site/rezmobileapps/treking> - Chicago transit tracking app for Android-powered devices -- 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
