ListView IllegalStateException: “The content of the adapter has changed but ListView did not receive a notification”

Question

This was discussed earlier here Android, ListView IllegalStateException: "The content of the adapter has changed but ListView did not receive a notification" but I still have the problem. I've got Service, which dowloads data from web, saves it do db and fires intent when it's completed. My Activity has ListView and BroadCast receiver:

private class NewsUpdateReceiver extends BroadcastReceiver{

        @Override
        public void onReceive(Context context, Intent intent) {

            mNotificationManager.cancel(NewsService.NOTIFICATION_ID);

            loadNewsFromDB();
        }
    }

 private void loadNewsFromDB(){
        mList.clear();
        ContentResolver cr = getContentResolver();

        Cursor cursor = cr.query(MeidahonProvider.CONTENT_URI, null, null, null, null);

        if(cursor.moveToFirst()){
            do{
                String title = cursor.getString(MeidahonProvider.TITLE_COLUMN);
                String description = cursor.getString(MeidahonProvider.DESCRIPTION_COLUMN);
                String link = cursor.getString(MeidahonProvider.LINK_COLUMN);
                long datems = cursor.getLong(MeidahonProvider.DATE_COLUMN);
                Date date=new Date(datems);
                NewsItem item = new NewsItem(title, description, link, date);
                mList.add(item);
                mAdapter.notifyDataSetChanged();
            }while(cursor.moveToNext());
        }
        cursor.close();
    }

Every time when item is add to ArrayList, I call mAdapter.notifyDataSetChanged(); but still have exception. How can I solve the problem?

UPD LOG

java.lang.IllegalStateException: The content of the adapter has changed but ListView  did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. [in ListView(2131296334, class android.widget.ListView) with Adapter(class com.transportoid.Tracks.TrackListAdapter)]
at android.widget.ListView.layoutChildren(ListView.java:1432)
at android.widget.AbsListView.onTouchEvent(AbsListView.java:2062)
at android.widget.ListView.onTouchEvent(ListView.java:3234)
at android.view.View.dispatchTouchEvent(View.java:3709)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:852)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)

I guess you call `mAdapter.notifyDataSetChanged();` too frequently, and that's why the exception raises. Have you tried to notify the adapter after the `do/while` block instead of doing this every cursor move? — ernazm, Jun 25 '11 at 15:25
No, I thought that it should be called after every change, but I'll try. — , Jun 25 '11 at 15:26

BonanzaDriver · Accepted Answer · 2011-06-26T16:02:02.070

First off, unless you "need" for your various bounded components to be made aware of the change in the adapter content on every iteration I would only call adapter.notifyDataSetChanged() after you've completed all the additions.

Secondly, can you provide the Exception and StackTrace?

Third, what Thread is this code being invoked with (the main GUI dispatching thread or a background)?

Thanks Migher for the updated Logcat. Do me a favor to help clarify a point: can you run a quick test to see what happens when you manually enter the same data values ... do it from a menu selection or a button click event (so we'll know it's on the GUI thread)? Getting the same error?

Also worth pointing out is give a SimpleCursorAdapter a try instead of the regular Adapter you're currently using. As I'm not able to run this through my debugger this might be just a simpler fix than going back and forth with "asynchronous tech support" suggestions, as I'm sure you'd like this fixed sooner rather than later.

Let me know how either of these work - thanks

I updated my posted answer here ... give these a shot and let us know what happens? — BonanzaDriver, Jun 26 '11 at 16:02
I did not have access to device, which produced crashes. But after I moved mAdapter.notifyDataSetChanged(); from do-while, app became more stable. But I still get rare crashes. Thanks for your responses. — , Jun 30 '11 at 20:15

ListView IllegalStateException: “The content of the adapter has changed but ListView did not receive a notification”

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