Android function to return IP address

Question

I'm sending data from android device to localhost database. To do this I need to use my ip address. I can find my ip address by searching 'ipconfig' on the command prompt. I just noticed that my ip address changed slightly even though im using the same wifi connection. The last digit of my ip address changed. This needed a minor change in my code but I was wonder if there was an android function that returned your computers ip address for you so that the code could look like below. Such a function would also help when using other forms of internet connection that would change your ip address.

HttpPost httpPost = new HttpPost("http://" + ipAddressFunction() + "/linker.php");// home wifi 

Answer 1

first get your network-interfaces via:

NetworkInterface.getNetworkInterfaces();

then get the IP(s) va:

getInetAddresses()

Answer 2

Here is a function i made to get my Android Device IP.

//Get The Local IP Addresses
private String GetLocalIPAddress(Boolean LoopBack)
{
    try
    {
        for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();)
        {
            NetworkInterface intf = en.nextElement ();  
            for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();)
            {
                InetAddress inetAddress = enumIpAddr.nextElement ();  
                if(inetAddress.getHostAddress().contains("."))
                {
                    if(inetAddress.isLoopbackAddress() == LoopBack)
                    {
                        return inetAddress.getHostAddress();
                    }
                }
            }
        }
    }
    catch (Exception e)
    {
        Log.d(this.getClass().toString(), "Failed Getting Local IP\n\n" + e.getMessage());
    }
    return null;
}

This function receives a Boolean parameter, if True, it will return the Local Loopback IP (IE: 127.0.0.1), if False, it will return the normal IP (IE: 192.168.0.5)

Answer 3

您可以尝试连接多个IP，如果已证明返回数据是计算机IP