android的通讯录代码,listView的动态刷新，读取内置的联系人,独立的数据库,打电话，发短信,发邮箱,快速的二维码添加功能-Android code in my address book, listView dynamic refresh, read the built-in contact, a separate , make a phone call, send text messages, send E-mail, quick qr code add functionality