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Get IP Address Android Device
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| WifiManager wm = (WifiManager) getSystemService(WIFI_SERVICE); | |
| String ip = Formatter.formatIpAddress(wm.getConnectionInfo().getIpAddress()); |
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| // AndroidManifest.xml permissions | |
| <uses-permission android:name="android.permission.INTERNET" /> | |
| <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> | |
| // test functions | |
| Utils.getMACAddress("wlan0"); | |
| Utils.getMACAddress("eth0"); | |
| Utils.getIPAddress(true); // IPv4 | |
| Utils.getIPAddress(false); // IPv6 |
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| import java.io.*; | |
| import java.net.*; | |
| import java.util.*; | |
| import org.apache.http.conn.util.InetAddressUtils; | |
| public class Utils { | |
| /** | |
| * Convert byte array to hex string | |
| * @param bytes | |
| * @return | |
| */ | |
| public static String bytesToHex(byte[] bytes) { | |
| StringBuilder sbuf = new StringBuilder(); | |
| for(int idx=0; idx < bytes.length; idx++) { | |
| int intVal = bytes[idx] & 0xff; | |
| if (intVal < 0x10) sbuf.append("0"); | |
| sbuf.append(Integer.toHexString(intVal).toUpperCase()); | |
| } | |
| return sbuf.toString(); | |
| } | |
| /** | |
| * Get utf8 byte array. | |
| * @param str | |
| * @return array of NULL if error was found | |
| */ | |
| public static byte[] getUTF8Bytes(String str) { | |
| try { return str.getBytes("UTF-8"); } catch (Exception ex) { return null; } | |
| } | |
| /** | |
| * Load UTF8withBOM or any ansi text file. | |
| * @param filename | |
| * @return | |
| * @throws java.io.IOException | |
| */ | |
| public static String loadFileAsString(String filename) throws java.io.IOException { | |
| final int BUFLEN=1024; | |
| BufferedInputStream is = new BufferedInputStream(new FileInputStream(filename), BUFLEN); | |
| try { | |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(BUFLEN); | |
| byte[] bytes = new byte[BUFLEN]; | |
| boolean isUTF8=false; | |
| int read,count=0; | |
| while((read=is.read(bytes)) != -1) { | |
| if (count==0 && bytes[0]==(byte)0xEF && bytes[1]==(byte)0xBB && bytes[2]==(byte)0xBF ) { | |
| isUTF8=true; | |
| baos.write(bytes, 3, read-3); // drop UTF8 bom marker | |
| } else { | |
| baos.write(bytes, 0, read); | |
| } | |
| count+=read; | |
| } | |
| return isUTF8 ? new String(baos.toByteArray(), "UTF-8") : new String(baos.toByteArray()); | |
| } finally { | |
| try{ is.close(); } catch(Exception ex){} | |
| } | |
| } | |
| /** | |
| * Returns MAC address of the given interface name. | |
| * @param interfaceName eth0, wlan0 or NULL=use first interface | |
| * @return mac address or empty string | |
| */ | |
| public static String getMACAddress(String interfaceName) { | |
| try { | |
| List<NetworkInterface> interfaces = Collections.list(NetworkInterface.getNetworkInterfaces()); | |
| for (NetworkInterface intf : interfaces) { | |
| if (interfaceName != null) { | |
| if (!intf.getName().equalsIgnoreCase(interfaceName)) continue; | |
| } | |
| byte[] mac = intf.getHardwareAddress(); | |
| if (mac==null) return ""; | |
| StringBuilder buf = new StringBuilder(); | |
| for (int idx=0; idx<mac.length; idx++) | |
| buf.append(String.format("%02X:", mac[idx])); | |
| if (buf.length()>0) buf.deleteCharAt(buf.length()-1); | |
| return buf.toString(); | |
| } | |
| } catch (Exception ex) { } // for now eat exceptions | |
| return ""; | |
| /*try { | |
| // this is so Linux hack | |
| return loadFileAsString("/sys/class/net/" +interfaceName + "/address").toUpperCase().trim(); | |
| } catch (IOException ex) { | |
| return null; | |
| }*/ | |
| } | |
| /** | |
| * Get IP address from first non-localhost interface | |
| * @param ipv4 true=return ipv4, false=return ipv6 | |
| * @return address or empty string | |
| */ | |
| 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().toUpperCase(); | |
| boolean isIPv4 = InetAddressUtils.isIPv4Address(sAddr); | |
| if (useIPv4) { | |
| if (isIPv4) | |
| return sAddr; | |
| } else { | |
| if (!isIPv4) { | |
| int delim = sAddr.indexOf('%'); // drop ip6 port suffix | |
| return delim<0 ? sAddr : sAddr.substring(0, delim); | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } catch (Exception ex) { } // for now eat exceptions | |
| return ""; | |
| } | |
| } |
good
good.
For work in sdk > 23 change
from
boolean isIPv4 = InetAddressUtils.isIPv4Address(sAddr);
to
boolean isIPv4 = addr instanceof Inet4Address;
Hey! the method that you use in Utils.java works even when the device is not connected to wifi right? and do you know if i use this function at the moment to upload the app to Play Store maybe Google gets angry? i mean that function requires any special permission? TY
InetAddressUtils showing error
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good.