title: Get an information about all connected devices in the WIFI - connection
body: <p>I'm going to create a app that analyze the current connected wifi-network.
  Instead of that i want to get a number of all devices that are connected in that network im connected with my android mobile as well.</p>
  
  <p>A possibility is to ping all possibils ips in my networt, but if im in a class "a" net i have to check over 17 mio of ips out, which would take to much time...</p>
  
  <p>i.e. An Information: In the Textbox at the router 192.168.2.1 are 20 devices connected</p>