getIpAddress() returns 0.0.0.0. in android studio .Why?

Question

Creating WifiManager

 WifiManager wifiManager = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);

Getting ipAddress

 String ipAddress = Formatter.formatIpAddress(wifiManager.getConnectionInfo().getIpAddress());

And displaying in textview

 textview.setText("Your Device IP Address: " + ipAddress);

Have you added Internet Permission in `AndroidManifest.xml` file? — Mehul Kabaria, Jan 16 '20 at 06:00
@frankenstein I used both Emulator and Real device shows same. — FASALUL FASEEH K A, Jan 16 '20 at 10:02
@jaikhambhayta shows formatIpAddress() deprecated is that the problem — FASALUL FASEEH K A, Jan 16 '20 at 10:05

score 1 · Answer 1 · answered Jan 16 '20 at 06:03

You can use this method to get IP address of the device pass true for IPv4 and false for IPv6

public static String getIPAddress(boolean useIPv4) {
    try {
        List<NetworkInterface> interfaces = Collections.list(NetworkInterface.getNetworkInterfaces());
        for (NetworkInterface intf : interfaces) {
            List<InetAddress> addrs = Collections.list(intf.getInetAddresses());
            for (InetAddress addr : addrs) {
                if (!addr.isLoopbackAddress()) {
                    String sAddr = addr.getHostAddress();
                    //boolean isIPv4 = InetAddressUtils.isIPv4Address(sAddr);
                    boolean isIPv4 = sAddr.indexOf(':')<0;

                    if (useIPv4) {
                        if (isIPv4) 
                            return sAddr;
                    } else {
                        if (!isIPv4) {
                            int delim = sAddr.indexOf('%'); // drop ip6 zone suffix
                            return delim<0 ? sAddr.toUpperCase() : sAddr.substring(0, delim).toUpperCase();
                        }
                    }
                }
            }
        }
    } catch (Exception ex) { } // for now eat exceptions
    return "";
}

score 0 · Answer 2 · answered Jan 16 '20 at 07:34

0

You have to define <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/> in AndroidManifest.xml file, It will give you the ip address.

answered Jan 16 '20 at 07:34

score 0 · Answer 3 · answered Jan 16 '20 at 09:11

If you use a simulator or real device, you need to check this device has use wifi or network connection. If you don't know which device is using the network you need get all network and check IP, it has, so returns IP

public String getIPAddress(boolean useIPv4) {
    try {
        List<NetworkInterface> interfaces = Collections.list(NetworkInterface.getNetworkInterfaces());
        for (NetworkInterface intf : interfaces) {
            List<InetAddress> addrs = Collections.list(intf.getInetAddresses());
            for (InetAddress addr : addrs) {
                if (!addr.isLoopbackAddress()) {
                    String sAddr = addr.getHostAddress();
                    //boolean isIPv4 = InetAddressUtils.isIPv4Address(sAddr);
                    boolean isIPv4 = sAddr.indexOf(':')<0;

                    if (useIPv4) {
                        if (isIPv4) 
                            return sAddr;
                    } else {
                        if (!isIPv4) {
                            int delim = sAddr.indexOf('%'); // drop ip6 zone suffix
                            return delim<0 ? sAddr.toUpperCase() : sAddr.substring(0, delim).toUpperCase();
                        }
                    }
                }
            }
        }
    } catch (Exception ex) { } // for now eat exceptions
    return "";
 }

In AndroidManifest, add permission:

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

score 0 · Answer 4 · answered Jan 16 '20 at 10:32

Add this permission in Manifest

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

Make sure that Formatter library should be this

  import android.text.format.Formatter

Nothing wrong with your code. Just make sure this thing

getIpAddress() returns 0.0.0.0. in android studio .Why?

4 Answers4