android - Refresh/Reload database reference in custom ContentProvider after restore

Question

I use a ContentProvider in my app and everything works great except for one little issue. I have a backup and restore function that backs up the database to a file on the SD card and then those backup files can be restored to overwrite the current database. This whole process is working, but the ContentProvider still holds the reference/cache to the original database once one of the old backup files is restored. I can't seem to find a way to refresh or reload the database reference in the ContentProvider. I know the restore works because I can see the records in the db with SQLite Editor and when I close and re-open the app, it displays the correct records.

Does anybody know a way to do this? Is there a way to close and re-open the ContentProvider that I'm not seeing?

Answer 1

If you are targeting >= API 5 you can get a reference to your ContentProvider via a ContentProviderClient, and run a method specific to your implementation:

ContentResolver resolver = context.getContentResolver();
ContentProviderClient client = resolver.acquireContentProviderClient("myAuthority");
MyContentProvider provider = (MyContentProvider) client.getLocalContentProvider();
provider.resetDatabase();
client.release();

Add the reset method to your ContentProvider implementation:

public void resetDatabase() {
    mDatabaseHelper.close();
    mDatabaseHelper = new MyDatabaseOpenHelper(context);
}