CODEWITHSUNDEEP
javaandroidnetwork-programmingwifimanager
David_D
David_D

Reputation: 1402

Network info android ip inverted issue

I've got a problem. I'm displaying the network info in my application in this way:

// Some wifi info
        d=wifiManager.getDhcpInfo();

        s_dns1="DNS 1: "+intToIp(d.dns1);
        s_dns2="DNS 2: "+intToIp(d.dns2);    
        s_gateway="Default Gateway: "+intToIp(d.gateway);    
        s_ipAddress="IP Address: "+intToIp(d.ipAddress); 
        s_leaseDuration="Lease Time: "+String.valueOf(d.leaseDuration);     
        s_netmask="Subnet Mask: "+intToIp(d.netmask);    
        s_serverAddress="Server IP: "+intToIp(d.serverAddress);

all of course using wifiManager. Now i have a method to convert the values

public String intToIp(int i) {

       return ((i >> 24 ) & 0xFF ) + "." +
           ((i >> 16 ) & 0xFF) + "." +
           ((i >> 8 ) & 0xFF) + "." +
           ( i & 0xFF) ;
        }

It works.. But instead displays: 192.168.0.0 it displays 0.0.168.192.. How can i solve?

Upvotes: 0

Views: 423

Answers (2)

f1sh
f1sh

Reputation: 11943

Basically you already solved it. The bytes are arranged in little endian notation, meaning that the most significant byte (192) is at the last position. What you expect is big endian, which is used by "the humans".

You might read about Endianness here.

Just reverse the order in which you extract each byte and you're done.

Upvotes: 0

mik_os
mik_os

Reputation: 688

Just invert your intToIp method:

public String intToIp(int i) {
   return (i & 0xFF) + "." +
       ((i >> 8 ) & 0xFF) + "." +
       ((i >> 16) & 0xFF) + "." +
       ((i >> 24) & 0xFF);
}

Upvotes: 2

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