Hi, With an Activity there is no problem, the lifecycle is clear and we have to realease all the resources in that method. The problem is that I use this helper inside a ContentProvider. In this case there is neither clear lifecycle (almost for me) nor a “close()” or “onDestroy ()” method where release the resources.
S. On 21 ago, 09:54, jiaoni <[email protected]> wrote: > Hi S, > > I use a DBHelper class which extends the SQLiteOpenHelper class, and I > close it in the onDestroy() function of the Activity class. > > Jiaoni > > On Aug 21, 3:15 pm, "S. Mccoy" <[email protected]> wrote: > > > Hi all, > > > I have seen that if we use an AbstractSyncableContentProvider (other > > providers like ContactProvider use it), a “close()” method is > > implemented: > > public void close(){ > > if(mOpenHelper != null) > > mOpenHelper.close();} > > > In this case, the helper seems to be closed (and also de DB), the same > > helper that remains open in a ContentProvider. I can’t understand the > > lifecycle of the ContentProvider without a method to release all the > > things. Any ideas ?.-Thanks in advance. > > > S. > > > On 18 ago, 18:00, "S. Mccoy" <[email protected]> wrote: > > > > Maybe it’s an easy question, but I’ve tried to understand why all the > > > content providers seem not to close the DB that they use. In the > > > NotePadProvider example (in other providers is similar), it’s used a > > > Helper to manage the DB (that extends of SQLiteOpenHelper). This > > > helper has a method to close the DB (http://developer.android.com/ > > > reference/android/database/sqlite/SQLiteOpenHelper.html#close%28%29), > > > but in all the providers that I have seen (even in the example), this > > > method is never used. > > > > For example, in the query method of the NotPadProvider we use the > > > helper to open a DB > > > > // Get the database and run the query SQLiteDatabase db = > > > mOpenHelper.getReadableDatabase(); Cursor c = qb.query(db, > > > projection, selection, selectionArgs, null, null, > > > orderBy); // Tell the cursor what uri to watch, so it knows > > > when its source data changes c.setNotificationUri(getContext > > > ().getContentResolver(), uri); return c; > > > > the mOpenHelper is create in the “onCreate()” method, but there is no > > > reference to a mOpenHelper.close() in all the provider (maybe because > > > there is no “close()” method in ContentProvider). > > > > Do we need to close the SQLiteOpenHelper object? When we use it inside > > > a ContentProvider, where is the right place to close it? > > > > Thanks in advance. > > > S. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
