[android-developers] Databases and Activity life-cycle
Hi! I've been a long time reader, and I've had problems with handling databases (open, close, create adapter) within an Activity I think I've figured out the best way to do it so I wanted to share, by writing a small blog post to easily handle code. I would love to hear your thoughts and solutions on the subject. http://awiden.wordpress.com/2010/03/26/database-mangement-and-the-activity-lifecycle/ -- 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 To unsubscribe from this group, send email to android-developers+unsubscribegooglegroups.com or reply to this email with the words REMOVE ME as the subject.
[android-developers] Databases and Activity life-cycle (OnCreate -- onResume)
Hi! How to best handle databases during the Activity life-cyle? My example: 1. When I start the Activity I want to open the database so I create a new dbAdapter and open it. 2. onCreate calls populateFields and data is read from the database I just opened. The database remains opened because other functions in the Activity needs the database. 3. the Activity gets Paused so I want to close my open database to release resources : onPause -- dbAdapter.close() 4. the Activity gets Resumed so I need to open the database again: onResume -- dbAdapter.open() The problem: This will create two open instances of the database. When the Activity starts the first time after onCreate has finished onResume will be called (see: http://developer.android.com/intl/fr/images/activity_lifecycle.png). What's best practise to solve this? This error of handling databases is also present in the Notepad Tutorial. //Anders -- 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 To unsubscribe from this group, send email to android-developers+unsubscribegooglegroups.com or reply to this email with the words REMOVE ME as the subject.
