getMydownloadListInfo();
MyDownloadListAdapter ad = (MyDownloadListAdapter) list.getAdapter();
ad.notifyDataSetInvalidated();
// adapter.notifyDataSetChanged();
// adapter = new MyDownloadListAdapter(MyDownloadListInfoActivity.this, downData);
// list.setAdapter(adapter);为什么我这里使用notifyDataSetChanged()没有能刷新页面.只有使用下面的重新setAdapter才刷新了.