> Every line of code in every Android application is inside *some* callback. > onCreate() is a callback. onClick() is a callback. And so on. Hence, it is > impossible *not* to call camera.startPreview() from a callback, AFAICT. Or > am I missing something?
You are right, I was too conservative here in keeping stuff outside developer-specified callbacks under Android, a habit that grew in part from programming under multiple OS's where for instance for Windows Mobile one reads for void CALLBACK waveOutProc() "Applications should not call any system-defined functions from inside a callback function, except for ..." http://msdn.microsoft.com/en-us/library/aa910186.aspx However, apart from what *should* work under Android, there have been quite some issues with implementations of the Camera part of Android, including http://groups.google.com/group/android-developers/browse_thread/thread/993f24715e90df05/ http://groups.google.com/group/android-developers/browse_thread/thread/25a11ec5edde057/ http://code.google.com/p/android/issues/detail?id=1553 etc such that for me that finally made a pragmatic reason to really take only one small step at a time wherever I can with any of the camera functions, for lack of trust in stability. I'm sure some of my safeguards are indeed redundant. Regards On Nov 29, 12:06 am, "Mark Murphy" <[email protected]> wrote: > > I am not familiar with the semantics of some of the constructions that > > you use, but your use of AsyncTask() makes me wonder if you have > > safeguarded (e.g. copied) the image data[] by the time that > > onPictureTaken() returns, because image data[] has no guaranteed > > lifetime beyond that. > > Now that's an interesting point. I think my crash happens before then, > though, but it's something I should take care of. I'll give this a shot in > the next day or two. > > > I would also not have put the camera.startPreview() preview restart > > inside the onPictureTaken() callback, because typically one is not > > allowed to put system-related function calls inside callbacks. > > Every line of code in every Android application is inside *some* callback. > onCreate() is a callback. onClick() is a callback. And so on. Hence, it is > impossible *not* to call camera.startPreview() from a callback, AFAICT. Or > am I missing something? > > Thanks! > > -- > Mark Murphy (a Commons Guy)http://commonsware.com > Android App Developer Books:http://commonsware.com/books.html -- 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
