Great answer, Sean. Thanks. The original question was regarding AlertDialog.show() vs. AlertDialog.showDialog(), and not involving Activity.showDialog() which has no corresponding .show(). Assuming that these services share implementations, this seems to imply that the answer to his original question is that it's *never* safe to call AlertDialog.show() because you can never be sure that the user won't change orientation while the dialog is shown. More likely is that I'm just missing something here but I just spend a few hours struggling with alert dialogs so it sure would be great to see a good simple example of how to safely use them.
-Melinda On Jan 8, 9:55 am, Sean Hodges <[email protected]> wrote: > When you use Activity.showDialog() you are telling the parent activity > to manage the dialog that you create. > > From the API docs > (http://developer.android.com/intl/fr/reference/android/app/Activity.h...) > ): > "A call to onCreateDialog(int) will be made with the same id the first > time this is called for a given id. From thereafter, the dialog will > be automatically saved and restored." > > When you rotate the phone, your parent activity is closed and > re-created. The showDialog() method tells the activity to > automatically re-create the AlertDialog as well. > > When you use AlertDialog.show(), you are effectively managing the > dialog yourself. This means that when the activity is closed and > re-created, you would have to make sure the dialog is dismissed and > displayed correspondingly; otherwise the activity *may* be destroyed > before the dialog has chance to close, and the internal reference to > it will be flagged as leaked. > > On Fri, Jan 8, 2010 at 5:15 PM, Michael Dorin <[email protected]> wrote: > > When creating an AlertDialog...I have noticed in some cases, if you > > invoke .show directly, you > > get a leaked dialog error when you rotate the phone. > > In other cases you don't. > > > If you don't call .show and use showDialog from the activity you don't > > see the leaked dialogs. > > Are there some cases when you can use .show? > > > Or is it just dumb luck if you don't see a problem? > > > -Mike > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Beginners" group. > > > NEW! Try asking and tagging your question on Stack Overflow at > >http://stackoverflow.com/questions/tagged/android > > > To unsubscribe from this group, send email to > > [email protected] > > For more options, visit this group at > >http://groups.google.com/group/android-beginners?hl=en
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