How to find out the IP address of a router from code in Android?

Question

How can you find the IP address of the router (gateway address) from the code?

WifiInfo.getIpAddress() - returns the IP address of the device.

In the shell command, ipconfig does not return any value.

Here is my solution, but please let me know if there is a better way to do this:

WifiManager manager = (WifiManager)getSystemService(WIFI_SERVICE);
DhcpInfo info = manager.getDhcpInfo();
info.gateway;

Answer 1

Hey, this can help you: DHCPInfo

final WifiManager manager = (WifiManager) super.getSystemService(WIFI_SERVICE);
final DhcpInfo dhcp = manager.getDhcpInfo();
final String address = Formatter.formatIpAddress(dhcp.gateway);

Add the following lines to AndroidManifest.xml to access the Wi-Fi features:

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />

Since formatIpAddress is deprecated, you can now use the following code

byte[] myIPAddress = BigInteger.valueOf(manager.getIpAddress()).toByteArray();
ArrayUtils.reverse(myIPAddress);
InetAddress myInetIP = InetAddress.getByAddress(myIPAddress);
String myIP = myInetIP.getHostAddress();

Answer 2

, , , (AFAIK), Cordova, :

public class GetRouterIPAddress extends CordovaPlugin {

    @Override
    public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException {
        try {
            String ip = getRouterIPAddress();
            if (ip.equals("0.0.0.0")) {
                callbackContext.error("No valid IP address");
                return false;
            }
            callbackContext.success(ip);
            return true;
        } catch(Exception e) {
            callbackContext.error("Error while retrieving the IP address. " + e.getMessage());
            return false;
        }
    }

    private String formatIP(int ip) {
        return String.format(
            "%d.%d.%d.%d",
            (ip & 0xff),
            (ip >> 8 & 0xff),
            (ip >> 16 & 0xff),
            (ip >> 24 & 0xff)
        );
    }

    private String getRouterIPAddress() {
        WifiManager wifiManager = (WifiManager) cordova.getActivity().getSystemService(Context.WIFI_SERVICE);
        DhcpInfo dhcp = wifiManager.getDhcpInfo();
        int ip = dhcp.gateway;
        return formatIP(ip);
    }
}

https://github.com/vallieres/cordova-plugin-get-router-ip-address/blob/master/src/android/GetRouterIPAddress.java

Answer 3

Try the following:

$ busybox ip route show

It worked perfectly on my tablet using a terminal emulator!

Answer 4

To get the IP address try getInetAddress();