listView adapter 的java.lang.IllegalStateException

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. Make sure your adapter calls notifyDataSetChanged() when its content changes. [in ListView(16908298, class qiso.czc.customview.czc_version10.PullToRefreshListView$InternalListViewSDK9) with Adapter(class android.widget.HeaderViewListAdapter)]

由於我在getCount裏面定義了 goodeses.clear 搞到listView一會兒訪問的getCount出現了數目不一致出錯.  百度上查了也說Adapter數據更新後，沒有及時使用notifyDataSetChanged()方法通知UI，致使出現數據不一致而報錯。

 

@Override
    public int getCount() {
        if(dataList == null || dataList.isEmpty()) {
            goodses.clear();
            return 0;
        }



        for (CollectionGoods collectionGoods : dataList){
            if(collectionGoods.goods!=null)
            goodses.add(collectionGoods.goods);
        }


        return goodses.size();
    }

 

換成 如下這樣就沒問題了

if(dataList == null || dataList.isEmpty()) {
           
            return 0;
        }


        goodses.clear();
        for (CollectionGoods collectionGoods : dataList){
            if(collectionGoods.goods!=null)
            goodses.add(collectionGoods.goods);
        }


        return goodses.size();