Android 如何获得 IPV4 格式的 IP_ADDRESS
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How do I get IP_ADDRESS in IPV4 format
提问by Rahul Baradia
I am trying to get the IP address of an device i.e using WIFI or 3G connection. I am getting the ip address in IPV6 format which is not understandable. I want in IPV4 format IP address.I have done google but dint found any proper solutions.
我正在尝试获取设备的 IP 地址，即使用 WIFI 或 3G 连接。我正在获取 IPV6 格式的 IP 地址，这是无法理解的。我想要 IPV4 格式的 IP 地址。我已经做了谷歌，但没有找到任何合适的解决方案。
here is code which I am using to get IP address of an device
这是我用来获取设备 IP 地址的代码
public String getLocalIpAddress() {
try {
try {
for (Enumeration<NetworkInterface> en = NetworkInterface
.getNetworkInterfaces(); en.hasMoreElements();) {
NetworkInterface intf = en.nextElement();
for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();)
{
InetAddress inetAddress = enumIpAddr.nextElement();
System.out.println("ip1--:" + inetAddress);
System.out.println("ip2--:" + inetAddress.getHostAddress());
if (!inetAddress.isLoopbackAddress()) {
String ip = inetAddress.getHostAddress().toString();
System.out.println("ip---::" + ip);
EditText tv = (EditText) findViewById(R.id.ipadd);
tv.setText(ip);
return inetAddress.getHostAddress().toString();
}
}
}
} catch (Exception ex) {
Log.e("IP Address", ex.toString());
}
return null;
}
I am getting this ouput :
我得到这个输出：
ip1--:/fe80::5054:ff:fe12:3456%eth0%2
ip2--:fe80::5054:ff:fe12:3456%eth0
It should be displayed like this :
它应该显示如下：
192.168.1.1
please help me out..
请帮帮我..
回答by Rahul Baradia
After trying many tricks.. finally I can get the IP address in IPV4 format.. Here is my code..
尝试了很多技巧后..终于我可以得到IPV4格式的IP地址..这是我的代码..
public String getLocalIpAddress() {
try {
for (Enumeration<NetworkInterface> en = NetworkInterface
.getNetworkInterfaces(); en.hasMoreElements();) {
NetworkInterface intf = en.nextElement();
for (Enumeration<InetAddress> enumIpAddr = intf
.getInetAddresses(); enumIpAddr.hasMoreElements();) {
InetAddress inetAddress = enumIpAddr.nextElement();
System.out.println("ip1--:" + inetAddress);
System.out.println("ip2--:" + inetAddress.getHostAddress());
// for getting IPV4 format
if (!inetAddress.isLoopbackAddress() && InetAddressUtils.isIPv4Address(ipv4 = inetAddress.getHostAddress())) {
String ip = inetAddress.getHostAddress().toString();
System.out.println("ip---::" + ip);
EditText tv = (EditText) findViewById(R.id.ipadd);
tv.setText(ip);
// return inetAddress.getHostAddress().toString();
return ip;
}
}
}
} catch (Exception ex) {
Log.e("IP Address", ex.toString());
}
return null;
}
Added ifcondition as shown below
添加if条件如下所示
/**This shows IPV4 format IP address*/
if (!inetAddress.isLoopbackAddress() && InetAddressUtils.isIPv4Address(ipv4 = inetAddress.getHostAddress())){}
instead of this
而不是这个
/**This shows IPV6 format IP address*/
if (!inetAddress.isLoopbackAddress()){}
Many Thanks.. Rahul
非常感谢..拉胡尔
An alternative for checking if the address is a version 4 address is:
检查地址是否为版本 4 地址的替代方法是：
if (!inetAddress.isLoopbackAddress() && inetAddress instanceof Inet4Address)
回答by Simon Hewison
You cannot assume that any device has just one network address. You also cannot assume that it will have any IPv4 - it may be IPv6 only, so your application will need to be able to handle both IPv4 and IPv6 address displays.
您不能假设任何设备只有一个网络地址。您也不能假设它将具有任何 IPv4 - 它可能只是 IPv6，因此您的应用程序需要能够处理 IPv4 和 IPv6 地址显示。
Typically, an Android phone has at least two interfaces that get assigned usable ip addresses, rmnet0 for the 3G data, which for IPv4 is often carrier-grade NATed and so cannot accept incoming socket connections, and may also have an IPv6 address; and wlan0 for the wifi, which will have whatever IPv4 and/or IPv6 address it can negotiate with the network it attaches to.
通常，Android 手机至少有两个接口可以分配可用的 ip 地址，rmnet0 用于 3G 数据，对于 IPv4，它通常是运营商级的 NAT，因此不能接受传入的套接字连接，并且可能还有一个 IPv6 地址；和 wlan0 用于 wifi，它将具有它可以与其连接的网络协商的任何 IPv4 和/或 IPv6 地址。
Some versions of Android will intentionally drop the (typically more expensive) rmnet0 link when it attaches to wifi - in an attempt to reduce 3G data usage. This behaviour is a problem when the wifi has attached to something that is a captive portal that requires a manual sign-in.
某些版本的 Android 在连接到 wifi 时会故意丢弃（通常更昂贵）rmnet0 链接 - 以尝试减少 3G 数据使用。当 wifi 连接到需要手动登录的强制门户时，此行为是一个问题。
回答by 0nyx
It seems there is a seperate class Inet4Addressin the Java API for IPv4 addresses.
似乎在用于 IPv4 地址的 Java API 中有一个单独的类Inet4Address。
回答by rkachach
Following is a simple way to check either if it's IPv4 or IPv6:
以下是检查它是 IPv4 还是 IPv6 的简单方法：
InetAddress address = InetAddress.getByName(ip);
if (address instanceof Inet6Address) {
// It's ipv6
} else if (address instanceof Inet4Address) {
// It's ipv4
}
