ExistAndroid扫描示例

我存在：libexist，让局域网内的不同设备可以互相发现
libexist，是一个跨平台的开发库，目的是让局域网内的手机、电脑等设备可以互相发现。
安卓，Java版，具有以下功能：
1.主动向局域网其它设备报告自己的存在。
2.接收局域网内其它设备的主动报告，得知其它设备的存在。
3.向局域网内其它设备发起主动扫描，并且从回复中得知其它设备的存在。
本示例应用展示的是扫描其它设备的功能。 I exist: libexist, so that different devices within the LAN can be found in each other
libexist, it is a cross-platform development library, the purpose is to allow LAN mobile phones, computers and other devices can discover each other.
Android, Java version, has the following features:
    1. Other active LAN device reports to their existence.
    2. The initiative received reports of other devices within the LAN, that there are other devices.
    3. LAN initiates a scan to other devices, and that there are other devices from the reply.
This sample application shows the scanning function of other devices.