On Mar 3, 5:30 pm, Jesse McGrew <[email protected]> wrote: > I'm writing a simple app based on on the NotePad V3 example. In my > activity to edit a record, I have these methods: > > @Override > protected void onSaveInstanceState(Bundle outState) { > super.onSaveInstanceState(outState); > if (mRowId != null) > outState.putLong(MyDbAdapter.KEY_ROWID, mRowId); > } > > @Override > protected void onPause() { > super.onPause(); > saveState(); > } > > saveState() is defined pretty much as it is in the example: if mRowId > is set, it updates the existing database row, otherwise it creates a > new row and sets mRowId to point to it. > > The problem I'm having is that when I change the screen orientation > during this activity, I get duplicate rows. A row is inserted when I > flip the screen, then another row is inserted when I leave the > activity. > > Presumably, onSaveInstanceState() is being called first when the > activity is destroyed for the configuration change. Since there's no > row ID yet, it doesn't store a row ID in the bundle. Then onPause() is > called, which creates a new row, but it's too late to save the row ID > for next time. When the activity is recreated in the new orientation, > the bundle has no row ID, so the activity thinks it's creating a new > record instead of editing the one it just saved. > > What's the recommended fix here? Should I persist to the database in > onSaveInstanceState() as well as onPause()? Or is there some way for > onPause() to store the row ID where the activity can find it later > after being recreated?
FWIW, I ended up making it save the row in either onSaveInstanceState () or onPause(), whichever one runs first. I also looked at the notepad app in the SDK samples, which uses a content provider. The way that one works is it creates the row as soon as you start editing a note, and then deletes the row if you leave without entering anything. I decided not to use that approach - I only want valid rows in the database. Jesse --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Beginners" 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-beginners?hl=en -~----------~----~----~----~------~----~------~--~---
