NetWorkUtils 获取客户端真实ip

NetWorkUtils.java

public class NetWorkUtils {
    public static String getIPAddress(boolean useIPv4) {
      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();
                      }
                  }
              }
          }
      }
      return "";
   }
}

需要添加权限

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

copy from https://stackoverflow.com/a/13007325/5279354