[android-developers] Strange instance of app not responding error
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi. A customer just notified me that she's experiencing the infamous app not responding / wait, force close message during a specific operation. By just waiting enough, the app resumes ok. Now, that specific operation is indeed long and in fact it has been programmed in a background thread, with a progress dialog signaling the wait. I can't reproduce the problem on my development phone - I suppose because it's perhaps faster than the phone of the user. But I can't reproduce the problem either with the emulator, which I suppose is slow enough. Generally speaking, I think I could be able to solve this specific problem with the customer giving me the proper feedback. It's the general issue that hassles me. This part of the application is very good covered by tests at different levels, including automated black-box tests with Robotium that drive the UI as the user would do, and even in stress mode (repeating the test multiple times). So I supposed to be very safe in that area and I'm disappointed to discover that it was a false sense of safety. What am I possibly missing? Also, is it possible / does make sense to slow down a phone during tests? I was thinking of a service running in background just consuming some CPU cycles to make the phone less responsive. - -- Fabrizio Giudici - Java Architect, Project Manager Tidalwave s.a.s. - We make Java work. Everywhere. java.net/blog/fabriziogiudici - www.tidalwave.it/people fabrizio.giud...@tidalwave.it -BEGIN PGP SIGNATURE- Version: GnuPG/MacGPG2 v2.0.14 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEUEARECAAYFAkx8uUcACgkQeDweFqgUGxeL7gCVGEE8EYiE2J0t9vnS48LVYOrd hwCfZW1TN7TFM8CbYTIZR36pDU6TcSE= =X0L9 -END PGP SIGNATURE- -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Strange instance of app not responding error
On Tue, Aug 31, 2010 at 4:11 AM, Fabrizio Giudici fabrizio.giud...@tidalwave.it wrote: So I supposed to be very safe in that area and I'm disappointed to discover that it was a false sense of safety. What am I possibly missing? Well, that's difficult to answer in the abstract. The two most variable performance things I can think of in Android are network I/O operations and flash writes. The former is fairly obvious, and we've been recommending network I/O be done in an AsyncTask, IntentService, or background thread for some time. The flash write scenario was new to me. Brad Fitzpatrick's presentation at Google I|O 2010 (Writing zippy Android apps, or something like that) was a bit of an eye-opener. I had not realized exactly how slow a flash write could be -- 1 byte in 200ms has been seen, though normally it's tons faster. The speed will vary widely, based on hardware capabilities, how much of the flash filesystem is in use, wear-leveling status, and a host of other criteria. And, the emulator won't emulate this, since the emulator's write speeds are that of the host PC, typically on a hard drive or SSD-caliber flash. Of course, there's always the possibility that the interference is from something else on this person's phone. -- Mark Murphy (a Commons Guy) http://commonsware.com | http://github.com/commonsguy http://commonsware.com/blog | http://twitter.com/commonsguy Android Development Wiki: http://wiki.andmob.org -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Strange instance of app not responding error
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 8/31/10 10:22 , Mark Murphy wrote: The two most variable performance things I can think of in Android are network I/O operations and flash writes. The former is fairly obvious, and we've been recommending network I/O be done in an AsyncTask, IntentService, or background thread for some time. Thanks for pointing out those things. Is it also reading from flash slow? The long operation I'm talking of is reading a bunch of data from the flash to RAM (no network, no writes). - -- Fabrizio Giudici - Java Architect, Project Manager Tidalwave s.a.s. - We make Java work. Everywhere. java.net/blog/fabriziogiudici - www.tidalwave.it/people fabrizio.giud...@tidalwave.it -BEGIN PGP SIGNATURE- Version: GnuPG/MacGPG2 v2.0.14 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkx8vlwACgkQeDweFqgUGxdgsgCgpm18MvBnIM8CGOBQ2KFGeoes IGUAmwY1vqxep5oyyO3EjaCcuHt9rXVh =kqG7 -END PGP SIGNATURE- -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
