摘要：
1.两种菜单：长按菜单和主菜单 a）长按菜单：覆盖onCreateContextMenu(ContextMenu menu, View view,ContextMenuInfo menuInfo)； getMenuInflater().inflate(R.menu.context_menu, menu)，context_menu为menu目录下的xml文件; AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo，info.position定位被长按的Item. menu.setHeaderView(v) 能为此菜单添加一 阅读全文
