说明：  1 手机先启动WIFI,安装 TalkDemo.apk 2 启动TalkDemo，IP地址输入框显示的是自己手机的IP 如果想自己呼叫自己，直接点击开始。 如果想两部手机相互通话，则相互填写对方手机IP后，再点击开始按钮。
(A phone first start WIFI, installation TalkDemo.apk 2 Start TalkDemo, IP address input box shows your phone s IP     If you want to own your own call, just click start.     If you want two phone calls to each other, then fill each other mutually IP phone, and then click the Start button.)