Android解决4.2的listview setadapter以后不能添加头布局的问题

      

//首先保存当前的适配器
BaseAdapter adapter = (BaseAdapter) mListView.getAdapter();
//将当前适配器设置成null
mListView.setAdapter(null);
//重新添加headerview
mListView.addHeaderView(advView);
//再将之前的adapter设置回原来listview
mListView.setAdapter(adapter);
//通知listview刷新界面
adapter.notifyDataSetChanged();