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)]

由于我在getCount里面定义了 goodeses.clear 搞到listView一会儿访问的getCount出现了数目不一致出错.  百度上查了也说Adapter数据更新后，没有及时使用notifyDataSetChanged()方法通知UI，致使出现数据不一致而报错。

 

@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();
    }

 

换成 如下这样就没问题了

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


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


        return goodses.size();