What you really need to do is stop the thing that's updating your list before serializing it, then restart it from the point where it left off after deserializing it. Or find another way of coordinating this background work you're doing.
Also, you shouldn't be calling restoreRecents in both onCreate and onRestoreInstanceState. Pick one or the other. Doug On Thursday, July 5, 2012 1:35:07 PM UTC-7, alex b wrote: > > I saw the notice about the syncronization of the Vector type, but it > didn't help me find a solution to the problem. What I believe i need to do > is... > > lock the ArrayList, Vector whatever > update the ArrayList > unlock the ArrayList > > but I don't know how to accomplish this. > > > > On Tuesday, July 3, 2012 1:36:58 PM UTC-7, RichardC wrote: > >> I don't think Vector is thread safe in the way you expect did you read: >> >> *"This class is equivalent to >> ArrayList<http://developer.android.com/reference/java/util/ArrayList.html> >> with >> synchronized operations. This has a performance cost, and the >> synchronization is not necessarily meaningful to your application: >> synchronizing each call to get, for example, is not equivalent to >> synchronizing on the list and iterating over it (which is probably what you >> intended). If you do need very highly concurrent access, you should also >> consider >> CopyOnWriteArrayList<http://developer.android.com/reference/java/util/concurrent/CopyOnWriteArrayList.html> >> . " >> * >> http://developer.android.com/reference/java/util/Vector.html >> >> The implication of the above is that your Vector change be changed from >> another thread whilst you are trying to serialize it. >> >> >> On Monday, July 2, 2012 8:52:46 PM UTC+1, alex b wrote: >>> >>> I have an activity that contains a private Vector<myobject>, thread safe >>> version of ArrayList. The activity adds items to the ArrayList, and in >>> onSaveInstanceState() I save the data (see code below). The problem is >>> that it looses items and it seems to have after the GC runs. So what am I >>> missing? >>> >>> >>> private static RecentItems _lstRecent; >>> >>> @Override >>> public void onCreate(Bundle savedInstanceState) { >>> >>> super.onCreate(savedInstanceState); >>> setContentView(R.layout.main); >>> >>> restoreRecents(savedInstanceState); >>> } >>> >>> @Override >>> protected void onSaveInstanceState(Bundle outState){ >>> super.onSaveInstanceState(outState); >>> >>> String s=serializeIt(_lstRecent); >>> bundle.putString("lstRecent", s); >>> } >>> >>> @Override >>> protected void onRestoreInstanceState(Bundle outState){ >>> super.onSaveInstanceState(outState); >>> >>> this.restoreRecents(outState); >>> } >>> >>> private void restoreRecents(Bundle bundle){ >>> if (bundle!=null){ >>> String s = bundle.getString("lstRecent"); >>> _lstRecent=deserializeIt(s); >>> } >>> >>> if (_lstRecent ==null) >>> _lstRecent=new RecentItems();//unt >>> >>> } >>> >>> -- 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
