How to get Host name of ip address in android?

Question

I want to make a small android app that get ip addresses and host name from LAN network that are connected. I have a code that run great to get ip address in a LAN network which is connected but I don't know how to get host name of their ip addresses. Where I need to changing in code. Sorry for bad English.

Here is my code for getting ip address in lan network

String connections = "";
    InetAddress host;
    try
    {
        host = InetAddress.getByName("192.168.1.1");
       byte[] ip = host.getAddress();
       for(int i = 1; i <= 254; i++)
        {
            ip[3] = (byte) i;
            InetAddress address = InetAddress.getByAddress(ip);

            if(address.isReachable(100))
            {


                System.out.println(address + " machine is turned on and can be pinged "+address.getCanonicalHostName());
                connections+= address+"\n";
            }
            else if(!address.getHostAddress().equals(address.getHostName()))
            {
                System.out.println(address + " machine is known in a DNS lookup");
                System.out.println(address.getHostAddress()+"host Name:"+ address.getHostName());
            }

        }
        tv.setText(connections);

    }
    catch(UnknownHostException e1)
    {
        e1.printStackTrace();
    }
    catch(IOException e)
    {
        e.printStackTrace();
    }

Answer 1

Use .getHostname()

InetAddress addr = InetAddress.getByName("192.168.1.1");
String host = addr.getHostName();
System.out.println(host);