是否可以使用一些代码获得设备的IP地址?
当前回答
在AndroidManifest.xml中声明ACCESS_WIFI_STATE权限:
<uses-permission
android:name="android.permission.ACCESS_WIFI_STATE"/>
可以通过WifiManager获取IP地址:
Context context = requireContext().getApplicationContext();
WifiManager wm = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
String ip = Formatter.formatIpAddress(wm.getConnectionInfo().getIpAddress());
其他回答
您不需要像目前提供的解决方案那样添加权限。以字符串形式下载此网站:
http://www.ip-api.com/json
or
http://www.telize.com/geoip
下载一个网站作为字符串可以用java代码完成:
http://www.itcuties.com/java/read-url-to-string/
像这样解析JSON对象:
https://stackoverflow.com/a/18998203/1987258
json属性“query”或“ip”包含ip地址。
这里是@Nilesh和@anargund的kotlin版本
fun getIpAddress(): String {
var ip = ""
try {
val wm = applicationContext.getSystemService(WIFI_SERVICE) as WifiManager
ip = Formatter.formatIpAddress(wm.connectionInfo.ipAddress)
} catch (e: java.lang.Exception) {
}
if (ip.isEmpty()) {
try {
val en = NetworkInterface.getNetworkInterfaces()
while (en.hasMoreElements()) {
val networkInterface = en.nextElement()
val enumIpAddr = networkInterface.inetAddresses
while (enumIpAddr.hasMoreElements()) {
val inetAddress = enumIpAddr.nextElement()
if (!inetAddress.isLoopbackAddress && inetAddress is Inet4Address) {
val host = inetAddress.getHostAddress()
if (host.isNotEmpty()) {
ip = host
break;
}
}
}
}
} catch (e: java.lang.Exception) {
}
}
if (ip.isEmpty())
ip = "127.0.0.1"
return ip
}
如果你有一个壳;Ifconfig eth0也适用于x86设备
在Kotlin中,没有Formatter
private fun getIPAddress(useIPv4 : Boolean): String {
try {
var interfaces = Collections.list(NetworkInterface.getNetworkInterfaces())
for (intf in interfaces) {
var addrs = Collections.list(intf.getInetAddresses());
for (addr in addrs) {
if (!addr.isLoopbackAddress()) {
var sAddr = addr.getHostAddress();
var isIPv4: Boolean
isIPv4 = sAddr.indexOf(':')<0
if (useIPv4) {
if (isIPv4)
return sAddr;
} else {
if (!isIPv4) {
var delim = sAddr.indexOf('%') // drop ip6 zone suffix
if (delim < 0) {
return sAddr.toUpperCase()
}
else {
return sAddr.substring(0, delim).toUpperCase()
}
}
}
}
}
}
} catch (e: java.lang.Exception) { }
return ""
}
编译一些想法,以更好的kotlin解决方案从WifiManager获得wifi ip:
private fun getWifiIp(context: Context): String? {
return context.getSystemService<WifiManager>().let {
when {
it == null -> "No wifi available"
!it.isWifiEnabled -> "Wifi is disabled"
it.connectionInfo == null -> "Wifi not connected"
else -> {
val ip = it.connectionInfo.ipAddress
((ip and 0xFF).toString() + "." + (ip shr 8 and 0xFF) + "." + (ip shr 16 and 0xFF) + "." + (ip shr 24 and 0xFF))
}
}
}
}
或者,您可以通过NetworkInterface获取ip4环回设备的ip地址:
fun getNetworkIp4LoopbackIps(): Map<String, String> = try {
NetworkInterface.getNetworkInterfaces()
.asSequence()
.associate { it.displayName to it.ip4LoopbackIps() }
.filterValues { it.isNotEmpty() }
} catch (ex: Exception) {
emptyMap()
}
private fun NetworkInterface.ip4LoopbackIps() =
inetAddresses.asSequence()
.filter { !it.isLoopbackAddress && it is Inet4Address }
.map { it.hostAddress }
.filter { it.isNotEmpty() }
.joinToString()
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