Re: [android-developers] Do SQLiteDatabase references go stale?
On Mon, Jul 29, 2013 at 7:00 PM, Nathan nathan.d.mel...@gmail.com wrote: If I manage to get logs from the users, I might know what exception it is. I wouldn't rely on waiting on users to send you anything. Have your app automatically send you reports using something like ACRA, then flood your app with log that are also sent in your report until you track the issue down. - 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 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 --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [android-developers] Do SQLiteDatabase references go stale?
On Tuesday, July 30, 2013 9:33:44 AM UTC-7, TreKing wrote: On Mon, Jul 29, 2013 at 7:00 PM, Nathan nathan@gmail.comjavascript: wrote: If I manage to get logs from the users, I might know what exception it is. I wouldn't rely on waiting on users to send you anything. Have your app automatically send you reports using something like ACRA, then flood your app with log that are also sent in your report until you track the issue down. I agree with that advice. I am finding any failure places and am treating them as a non fatal exception that should be reported in Crashlytics without user intervention. This probably means that it will take more than one update to fix, but that's the breaks. Nathan -- -- 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 --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [android-developers] Do SQLiteDatabase references go stale?
Won't this happen when the app dies and goes out of memory, and is
then restarted?
Kris
On Mon, Jul 29, 2013 at 8:00 PM, Nathan nathan.d.mel...@gmail.com wrote:
Based on previous discussions of best practices here, I employ a factory
method for opening SQLite Databases.
/**
* Factory method ensures only one instance of database in memory.
* @param path on external storage
* @return
*/
static public SQLiteDatabase getInstance(String path)
{
try
{
if(alreadyOpened.containsKey(path))
{
return alreadyOpened.get(path);
}
SQLiteDatabase tdb= SQLiteDatabase.openDatabase(path, null,
SQLiteDatabase.OPEN_READWRITE |SQLiteDatabase.CREATE_IF_NECESSARY);
alreadyOpened.put(path, tdb);
return tdb;
}
catch(Exception ex)
{
Log.e(TileDatabase, openExisting, ex);
return null;
}
}
This ensures that an SQLiteDatabase is opened once and closed never, which
Diane and others here said is a reasonable pattern.
Nonetheless, I get some reports from some users that their data dissappears
and reappears. In the morning it works, in the afternoon it is not
available, and the next day it is back again.
Ie, there is a query for blobs in this database and is either coming back
with zero results or throwing a SQLiteException that I am handling and
returning not available. If I manage to get logs from the users, I might
know what exception it is.
So in general, my question is this. Is there a reason that SQLiteDatabase
object may become inneffective, due to some changes in the system or
something I am doing, such as leaking a cursor or something? Could a
terminated process, due to Android wanting more memory or a crash, cause me
to be unable to open the database when the process starts again?
Should I be calling SQLiteDatabase.isOpen periodically or anything like
that?
Nathan
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Re: [android-developers] Do SQLiteDatabase references go stale?
On Monday, July 29, 2013 6:14:34 PM UTC-7, Kristopher Micinski wrote: Won't this happen when the app dies and goes out of memory, and is then restarted? Kris Not in my experience, no. Wish it were that easy to reproduce. Nathan -- -- 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 --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [android-developers] Do SQLiteDatabase references go stale?
Can't you send it a kill signal: that should reproduce the behavior. Kris On Mon, Jul 29, 2013 at 11:01 PM, Nathan nathan.d.mel...@gmail.com wrote: On Monday, July 29, 2013 6:14:34 PM UTC-7, Kristopher Micinski wrote: Won't this happen when the app dies and goes out of memory, and is then restarted? Kris Not in my experience, no. Wish it were that easy to reproduce. Nathan -- -- 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 --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- 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 --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [android-developers] Do SQLiteDatabase references go stale?
On Monday, July 29, 2013 8:20:02 PM UTC-7, Kristopher Micinski wrote: Can't you send it a kill signal: that should reproduce the behavior. It doesn't. I have no trouble opening opening databases after a kill, even after such databases were left open. Never have. But it could certainly be different on some device I don't have. OEMs go out of their way. In the customer cases in the field, I'm not sure the process ends at all, forcibly or otherwise. Nathan -- -- 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 --- You received this message because you are subscribed to the Google Groups Android Developers group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
