获取一个url里面的域名部分，并取对应的IP地址

比如：取这个地址“"http://blog.csdn.net/meetings/article/details/78785424"”里的“blog.csdn.net”对应的真实IP

/**
* 获取url对应的域名
*
* @param url
* @return
*/
public String getDomain(String url) {
String result = "";
int j = 0, startIndex = 0, endIndex = 0;
for (int i = 0; i < url.length(); i++) {
if (url.charAt(i) == '/') {
j++;
if (j == 2)
startIndex = i;
else if (j == 3)
endIndex = i;
}

}
result = url.substring(startIndex + 1, endIndex);
return result;
}

/**
* 通过域名获取真实的ip地址 (此方法需要在线程中调用)
*
* @param domain
* @return
*/
public String getIP(String domain) {
String ipAddress = "";
InetAddress iAddress = null;
try {
iAddress = InetAddress.getByName(domain);
} catch (UnknownHostException e) {
e.printStackTrace();
}
if (iAddress == null)
Log.i("xxx", "iAddress ==null");
else {
ipAddress = iAddress.getHostAddress();
}
return ipAddress;
}

调用：

final String url = "http://blog.csdn.net/meetings/article/details/78785424";

CoreFuncKt.ioThread(new Runnable() {
@Override
public void run() {
Log.i("ddd", "IP" + getIP(getDomain(url)));
}
});

执行结果：47.95.165.112