我希望在连接到wifi网络时,在运行我的应用程序的手机上获取用户的本地IPv4地址。使用以下代码:
public void write(PrintStream output) {
write(overallRoot, "", output);
}
private void write(TreeNode root, String code, PrintStream output) {
if(root != null) {
if(root.left == null && root.right == null) {
output.println(root.data + "\n");
}
// recursive-case
write(root.left, output);
write(root.right, output);
}
}
我能够获得接近IPv4地址的东西,但是当与命令行中的IPv4地址进行比较时,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formatIpAddress已被弃用,但在我找到获取IPv4地址的方法之前,我现在不太担心。
编辑:
我发现手机的wifi设置中的IP地址是我在使用解决方案获取IP地址时所获得的建议解决方案。有没有办法在ip config客户端获取IP地址?
答案 0 :(得分:0)
以下代码遍历它拥有的所有接口,然后打印接口的IPv4,IPv6和mac地址。对于LAN IP地址,您可以使用一个功能 isSiteLocal(),如果IP地址是本地地址,则返回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中代码的输出是:
-------------------------------------------------- -
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%低位
IPv4地址:127.0.0.1
-------------------------------------------------- -
答案 1 :(得分:0)
代码会打印运行 Android 或 java 应用程序的设备的本地IPv4地址。 / p>
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
}