wifi 二维码生成
小米手机的 wifi 可以生成二维码，通过扫码连接 wifi。当然，凡事都是两面性，好的方面，当然是即使忘记密码，也能让另一台手机连上网络，而且不用手输入密码；而坏的方面是，二维码是可解析的，知道二维码就知道 wifi 的密码。
二维码知识
本节内容来自 二维码知识
二维码格式
| 类型 | 说明 |
|---|---|
| 文本 text | 直接生成，无需处理 |
| 网址 url | 直接生成，无需处理（如果前缀加上 url: 在微信中不能自动跳转） |
| 名片 mecard | MECARD:N: 小明；TEL:13723456789;EMAIL: payonesmile@qq.com;ADR: 广州天河区；ORG:xx 有限公司；URL: http://pro.wwei.cn/;NOTE:QQ：13783821; |
| 电话 tel | tel:13723456789 |
| 邮箱 mail | mailto: payonesmile@qq.com |
| 短信 sms | smsto:13723456789: 短信内容 |
| 无线网络 WIFI | WIFI:S:CMCC;P:123456;T:WPA/WPA2; |
二维码纠错级别
纠错级别越高，生成图片会越大。
L 水平 7%的字码可被修正
M 水平 15%的字码可被修正
Q 水平 25%的字码可被修正
H 水平 30%的字码可被修正
WIFI 二维码
本节内容来自 https://github.com/zxing/zxing/wiki/Barcode-Contents
We propose a syntax like “MECARD” for specifying wi-fi configuration. Scanning such a code would, after prompting the user, configure the device’s Wi-Fi accordingly. Example:
1 | |
| Parameter | Example | Description |
|---|---|---|
| T | WPA | Authentication type; can be WEP or WPA or WPA2-EAP, or nopass for no password. Or, omit for no password. |
| S | mynetwork | Network SSID. Required. Enclose in double quotes if it is an ASCII name, but could be interpreted as hex (i.e. “ABCD”) |
| P | mypass | Password, ignored if T is nopass (in which case it may be omitted). Enclose in double quotes if it is an ASCII name, but could be interpreted as hex (i.e. “ABCD”) |
| H | true | Optional. True if the network SSID is hidden. Note this was mistakenly also used to specify phase 2 method in releases up to 4.7.8 / Barcode Scanner 3.4.0. If not a boolean, it will be interpreted as phase 2 method (see below) for backwards-compatibility |
| E | TTLS | (WPA2-EAP only) EAP method, like TTLS or PWD |
| A | anon | (WPA2-EAP only) Anonymous identity |
| I | myidentity | (WPA2-EAP only) Identity |
| PH2 | MSCHAPV2 | (WPA2-EAP only) Phase 2 method, like MSCHAPV2 |
Order of fields does not matter. Special characters \, ;, , and : should be escaped with a backslash (\) as in MECARD encoding. For example, if an SSID was literally "foo;bar\baz" (with double quotes part of the SSID name itself) then it would be encoded like: WIFI:S:"foo\;bar\\baz";;
实现
这里就不描述如何编写的了，代码在 github 开源，下面演示一下：
