java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive

java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive a notification

String keyStr = msg.obj.toString();
                //在改变listview的数据后一定要更新adapter，不然会报java.lang.IllegalStateException
                list_association.clear();
                lv_history.setVisibility(View.GONE);
                lv_association.setVisibility(View.VISIBLE);
                lv_searchResult.setVisibility(View.GONE);
                associateWordTask = new AssociateWordTask();
                associateWordTask.execute(keyStr);
在调用完list_association.clear();在asynctask中更新adapter，问题是如果异步任务由于网络状况没有执行onPostExecute()，会导致上面的异常。在list_association.clear()后加入adpAssociation.notifyDataSetChanged();问题就解决了，以后要注意类似的问题。