getHostAddress() returns a reversed ip address
android, ipv4, java
Solution
Ok, I just saw that your address is reversed! :)
It is referred as big/little endian issue, read more about Endianness which is must-to-know for all programmers, specially when doing applications integrations and migrations on different Operating Systems.
Add this after gettting the Connection Info from the Wifi manager.
int ipAddress = wi.getIpAddress();
ipAddress = (ByteOrder.nativeOrder().equals(ByteOrder.LITTLE_ENDIAN)) ?
Integer.reverseBytes(ipAddress) : ipAddress;
Then continue your code with toByteArray and getHostAddress etc.
Problem
I'm trying to get my cell phone ip address by using WifiManager and WifiInfo classes. It returns correct ip address reversed. ``` public String getWifiIpAddress() { WifiManager wm = (WifiManager) getSystemService(WIFI_SERVICE); WifiInfo wi = wm.getConnectionInfo(); byte[] ipAddress = BigInteger.valueOf(wi.getIpAddress()).toByteArray(); try { InetAddress myAddr = InetAddress.getByAddress(ipAddress); String hostAddr = myAddr.getHostAddress(); return hostAddr; } catch (UnknownHostException e) { // TODO Auto-generated catch block e.printStackTrace(); } return ""; } ``` result : 73.0.168.192