如何通过IPv4网络地址的用Java或Android逐个列表遍历？ [英] How to iterate through the list of IPv4 network addresses in Java or Android one by one?

问题描述

如何由一个经过Java或Android的一个可用的IPv4网络地址的列表迭代？

How to iterate through the list of available IPv4 network addresses in Java or Android one by one?

的 [这是一个自我回答提问] 的

推荐答案

一个可能的解决方案是：

A possible solution is the following:

   private Enumeration<NetworkInterface> networkInterfaces = null;
   private Enumeration<InetAddress> networkAddresses = null;

   ...
        try
        {
            while(true)
            {
                if(this.networkInterfaces == null)
                {
                    networkInterfaces = NetworkInterface.getNetworkInterfaces();
                }
                if(networkAddresses == null || !networkAddresses.hasMoreElements())
                {
                    if(networkInterfaces.hasMoreElements())
                    {
                        NetworkInterface networkInterface = networkInterfaces.nextElement();
                        networkAddresses = networkInterface.getInetAddresses();
                    }
                    else
                    {
                        networkInterfaces = null;
                    }
                }
                else
                {
                    if(networkAddresses.hasMoreElements())
                    {
                        String address = networkAddresses.nextElement().getHostAddress();
                        if(address.contains(".")) //IPv4 address
                        {
                            textView.setText(address);
                        }
                        break;
                    }
                    else
                    {
                        networkAddresses = null;
                    }
                }
            }
        }
        catch(SocketException e)
        {
            e.printStackTrace();
        }

在一个按钮的点击，这将显示的IP地址更改为网络接口上的下一个可用的IP地址。这样一来，就可以显示在一个时间的IP地址之一。

On the click of a button, this would change the displayed IP address to the next available IP address on the network interface. This way, it is possible to display the IP addresses one at a time.

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