01-16 13:27:23.082: ERROR/AndroidRuntime(2874): FATAL EXCEPTION: main
        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(-1, class android.widget.AutoCompleteTextView$DropDownListView) with Adapter(class com.hdm_i.dm.corp.android.muenchen.adapters.PoiAutoCompleteAdapter)]
        at android.widget.ListView.layoutChildren(ListView.java:1527)
        at android.widget.AbsListView.onLayout(AbsListView.java:1430)
        at android.view.View.layout(View.java:7228)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
        at android.view.View.layout(View.java:7228)
        at android.view.ViewRoot.performTraversals(ViewRoot.java:1145)
        at android.view.ViewRoot.handleMessage(ViewRoot.java:1865)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:130)
        at android.app.ActivityThread.main(ActivityThread.java:3687)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:507)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
        at dalvik.system.NativeStart.main(Native Method)  

public class PoiAutoCompleteAdapter extends ArrayAdapter<SearchTextAutoSuggest> implements Filterable {

    private List<SearchTextAutoSuggest> searchTextAutoSuggestList = new ArrayList<SearchTextAutoSuggest>();
    private SearchTextAutoSuggest defaultSuggestion = new SearchTextAutoSuggest();

    private Handler uiThreadHandler;

    public PoiAutoCompleteAdapter(Context context, int viewResourceId, Handler uiThreadHandler) {
        super(context, viewResourceId);
        this.uiThreadHandler = uiThreadHandler;
        defaultSuggestion.setName(AppConstants.DEFAULT_SEARCH_STRING_NAME);
    }

    @Override
    public int getCount() {
        return searchTextAutoSuggestList.size();
    }

    @Override
    public SearchTextAutoSuggest getItem(int position) {
        return searchTextAutoSuggestList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public Filter getFilter() {
        Filter filter = new Filter() {

            @Override
            protected FilterResults performFiltering(CharSequence constraint) {
                FilterResults filterResults = new FilterResults();
                synchronized (filterResults) {
                    if (constraint != null) {
                        // Clear and Retrieve the autocomplete results.
                        searchTextAutoSuggestList.clear();
                        searchTextAutoSuggestList = getFilteredResults(constraint);

                        // Assign the data to the FilterResults
                        filterResults.values = searchTextAutoSuggestList;
                        filterResults.count = searchTextAutoSuggestList.size();
                    }

                    return filterResults;
                }
            }

            @Override
            protected void publishResults(CharSequence constraint, final FilterResults filterResults) {
                uiThreadHandler.post(new Runnable() {
                    public void run() {
                        synchronized (filterResults) {
                            if (filterResults != null && filterResults.count > 0) {
                                notifyDataSetChanged();
                            } else {
                                Logs.e("Tried to invalidate");
                                notifyDataSetInvalidated();
                            }
                        }
                    }
                });
            }
        };
        return filter;
    }

    private List<SearchTextAutoSuggest> getFilteredResults(CharSequence constraint) {
        List<SearchTextAutoSuggest> searchTextAutoSuggestList = AppContext.searchTextAutoSuggestList;
        List<SearchTextAutoSuggest> filteredSearchTextAutoSuggestList = new ArrayList<SearchTextAutoSuggest>();

        // Assign constraint as a default option into the list
        defaultSuggestion.setLabel(getContext().getString(R.string.general_default_search_str) + " \'" + constraint + "\'");
        filteredSearchTextAutoSuggestList.add(defaultSuggestion);

        for (int i = 0; i < searchTextAutoSuggestList.size(); i++) {
            if (searchTextAutoSuggestList.get(i).getLabel().toLowerCase().startsWith(constraint.toString().toLowerCase())) {
                filteredSearchTextAutoSuggestList.add(searchTextAutoSuggestList.get(i));
            }
        }

        return filteredSearchTextAutoSuggestList;
    }

}