Android ContentProvider calls bursts of setNotificationUri() to CursorAdapter when many rows are inserted with a batch operation

Question

I have a custom ContentProvider which manages the access to a SQLite database. To load the content of a database table in a ListFragment, I use the

Answer 1

To address this exact problem, I overrode applyBatch and set a flag which blocked other methods from sending notifications.

    volatile boolean applyingBatch=false;
    public ContentProviderResult[] applyBatch(
        ArrayList operations)
        throws OperationApplicationException {
    applyingBatch=true;
    ContentProviderResult[] result;
    try {
        result = super.applyBatch(operations);
    } catch (OperationApplicationException e) {
        throw e;
    }
    applyingBatch=false;
    synchronized (delayedNotifications) {
        for (Uri uri : delayedNotifications) {
            getContext().getContentResolver().notifyChange(uri, null);
        }
    }
    return result;
}

I exposed a method to "store" notifications to be sent when the batch was complete:

protected void sendNotification(Uri uri) {
    if (applyingBatch) {
        if (delayedNotifications==null) {
            delayedNotifications=new ArrayList();
        }
        synchronized (delayedNotifications) {
            if (!delayedNotifications.contains(uri)) {
                delayedNotifications.add(uri);
            }
        }
    } else {
        getContext().getContentResolver().notifyChange(uri, null);
    }
}

And any methods that send notifications employ sendNotification, rather than directly firing a notification.

There may well be better ways of doing this - it certainly seems as though they're ought to be - but that's what I did.