您如何在Android上验证IP地址? [英] How do you validate an IP address on Android?

问题描述

我正在使用Android(作为客户端)和PC(作为服务器)之间的简单套接字通信.我正在让用户将IP地址输入到EditText字段中，并且我想验证IP地址.您如何在Android上验证IP地址?

I am using simple socket communication between Android (as the client) and PC (as the server). I am having the user input the IP address into an EditText field and I want to validate the IP address. How do you validate an IP address on Android?

推荐答案

API级别8 +:

您可以使用 Patterns.IP_ADDRESS 全局正则表达式

如果您使用android< 2.2:

You may directly include this regex in your project if you target devices with android < 2.2:

private static final Pattern IP_ADDRESS
    = Pattern.compile(
        "((25[0-5]|2[0-4][0-9]|[0-1][0-9]{2}|[1-9][0-9]|[1-9])\\.(25[0-5]|2[0-4]"
        + "[0-9]|[0-1][0-9]{2}|[1-9][0-9]|[1-9]|0)\\.(25[0-5]|2[0-4][0-9]|[0-1]"
        + "[0-9]{2}|[1-9][0-9]|[1-9]|0)\\.(25[0-5]|2[0-4][0-9]|[0-1][0-9]{2}"
        + "|[1-9][0-9]|[0-9]))");
Matcher matcher = IP_ADDRESS.matcher("127.0.0.1");
if (matcher.matches()) {
    // ip is correct
}

这篇关于您如何在Android上验证IP地址?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！