[英]Getting IP address of local network using java
连接到wifi网络时,我想在运行我的应用程序的手机上获取该用户的本地IPv4地址。 使用以下代码:
WifiManager wm = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);
String ip = Formatter.formatIpAddress(wm.getConnectionInfo().getIpAddress());
hostname = ip;
我能够获得接近IPv4地址的内容,但是与命令行中的IPv4地址相比,它并不完全相同。 有没有更好的方法来解决这个问题? 我知道不赞成使用formatIpAddress,但是直到找到一种获取IPv4地址的方法之前,我现在都不对此太担心。
编辑:
我发现使用解决方案获取建议的解决方案的IP地址时,手机的wifi设置中的IP地址就是我得到的。 有什么方法可以在ip config客户端获取ip地址吗?
以下代码遍历它具有的所有接口,然后打印该接口的IPv4,IPv6和mac地址。 对于LAN IP地址,可以使用isSiteLocal()函数,如果IP地址是本地地址,则该函数返回true。
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Enumeration;
public class App{
public static void main(String[] args)throws Exception {
// getting the list of interfaces in the local machine
Enumeration<NetworkInterface> n = NetworkInterface.getNetworkInterfaces();
while( n.hasMoreElements()){ //for each interface
System.out.println("----------------------------------------------------");
NetworkInterface e = n.nextElement();
//name of the interface
System.out.println("Interface Name: " + e.getName());
/* A interface may be binded to many IP addresses like IPv4 and IPv6
hence getting the Enumeration of list of IP addresses */
Enumeration<InetAddress> a = e.getInetAddresses();
while( a.hasMoreElements()){
InetAddress addr = a.nextElement();
String add = addr.getHostAddress().toString();
if( add.length() < 17 )
System.out.println("IPv4 Address: " + add);
else
System.out.println("IPv6 Address: " + add);
}
if(e.getHardwareAddress() != null){
// getting the mac address of the particular network interface
byte[] mac = e.getHardwareAddress();
// properly formatting the mac address
StringBuilder macAddress = new StringBuilder();
for(int i =0; i < mac.length; i++){
macAddress.append(String.format("%03X%s", mac[i],(i < mac.length -1) ? "-":""));
}
System.out.println("Hardware adrress: " + macAddress.toString());
}
System.out.println("----------------------------------------------------");
}
}
}
kali linux 2.0中的代码输出为:
-------------------------------------------------- -
接口名称:wlan0
IPv6地址:fe80:0:0:0:1992:d9bc:7d8c:d85b%wlan0
IPv4地址:192.168.1.137
硬件地址:078-0E4-000-0E7-0B0-046
-------------------------------------------------- -
-------------------------------------------------- -
接口名称:lo
IPv6地址:0:0:0:0:0:0:0:1%lo
IPv4地址:127.0.0.1
-------------------------------------------------- -
该代码显示运行Android或Java应用程序的设备的本地IPv4地址 。
try {
Enumeration networkInterfaces = NetworkInterface.getNetworkInterfaces(); // gets All networkInterfaces of your device
while (networkInterfaces.hasMoreElements()) {
NetworkInterface inet = (NetworkInterface) networkInterfaces.nextElement();
Enumeration address = inet.getInetAddresses();
while (address.hasMoreElements()) {
InetAddress inetAddress = (InetAddress) address.nextElement();
if (inetAddress.isSiteLocalAddress()) {
System.out.println("Your ip: " + inetAddress.getHostAddress()); /// gives ip address of your device
}
}
}
} catch (Exception e) {
// Handle Exception
}
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