Hey! I was having exactly the same problem Rico described, as you can see in my thread ( http://groups.google.com/group/android-developers/browse_thread/thread/76fa8600833f5348/59210de050c9bd20 ).
After some investigation, I found that most launchers (including Launchalot :P) start activities with FLAG_ACTIVITY_NEW_TASK and FLAG_ACTIVITY_RESET_TASK_IF_NEEDED (some also set FLAG_ACTIVITY_BROUGHT_TO_FRONT). The Android Market, however, only sets FLAG_ACTIVITY_NEW_TASK, and I guess this is the reason for the strange behavior. This causes several OutOfMemoryErrors when my users upgrades the app and launches it from the market. I couldn't use singleTask or singleInstance as these flags mess up with the history. For example if the activity stack is A -> B -> C and the user is in home screen, pressing the application icon should take them back to activity C, but setting singleTask or singleInstance on the main activity will interfere with this. In the end I found a workaround that prevents all those activities from eating up all your memory. If you start all activities in your app with the FLAG_ACTIVITY_CLEAR_TOP flag, you are guaranteed that no activity will have more than one instance lying around in the stack. For example if the stack is A -> B -> C -> A, and the user starts activity B again, the OS will clear away the activities on the top and you will end up with A -> B. Of course this only works if your activities are designed to be single-instance. Hope this helps. On May 28, 7:09 am, Mark Murphy <[email protected]> wrote: > Rico Yao wrote: > > That app (Launchalot) is a launcher app (i.e. it just launches other > > apps). I'm not saying that Launchalot doesn't have multiple instances > > of itself created if launched from the Market or notifications bar. It > > probably does. > > Anyone who puts Launchalot on the Market should have their head examined. > > :-) > > -- > Mark Murphy (a Commons > Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy > > _Android Programming Tutorials_ Version 2.0 Available! -- 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
