Android通过反射EthernetManager Api设置以太网为静态IP地址或者动态获取IP

一、对于一些工控行业的Android主板一般都会扩展个以太网接口，也就是可以插网线进行上网；然后在系统设置页面有个以太网菜单可以进行IP、网关等设置，如下：

二、那怎么通过代码去设置呢？

1、Android系统在Framework层是有提供操作以太网Api的也就是android.net.EthernetManager，但是Google把Api给隐藏了；所以最终你是调用不了的

2、那需要怎么操作才能调用到隐藏的Api呢？相信你肯定会立马想到使用反射去调用；对，没错！这里我就是使用的这个方式；当然如果你公司系统层也是自己搞的话就更简单了

三、先假装如果可以调用到android.net.EthernetManager的Api，那么代码应该怎么写呢？

• 设置静态IP地址， new LinkAddress()报错是因为源码@hide了
  

• 设置动态ip地址

四、接下来就是通反射去调用了，代码量就比上面多的多了

/**
 * 文件名:    EthernetUtil
 * 创建时间:  2020/8/21 on 11:22
 * 描述:     TODO 设置以太网静态ip 动态ip地址
 *
 * @author 阿钟
 */ public class EthernetUtil { /**
     * 设置以太网动态获取IP
     */ public static boolean setDynamicIp(Context context) { try { Class<?> ethernetManagerCls = Class.forName("android.net.EthernetManager"); //获取EthernetManager实例 Object ethManager = context.getSystemService("ethernet"); //创建IpConfiguration Class<?> ipConfigurationCls = Class.forName("android.net.IpConfiguration"); Object ipConfiguration = ipConfigurationCls.newInstance(); //获取ipAssignment、proxySettings的枚举值 Map<String, Object> ipConfigurationEnum = getIpConfigurationEnum(ipConfigurationCls); //设置ipAssignment Field ipAssignment = ipConfigurationCls.getField("ipAssignment"); ipAssignment.set(ipConfiguration, ipConfigurationEnum.get("IpAssignment.DHCP")); //设置proxySettings Field proxySettings = ipConfigurationCls.getField("proxySettings"); proxySettings.set(ipConfiguration, ipConfigurationEnum.get("ProxySettings.NONE")); //获取EthernetManager的setConfiguration() Method setConfigurationMethod = ethernetManagerCls.getDeclaredMethod("setConfiguration", ipConfiguration.getClass()); //设置动态IP setConfigurationMethod.invoke(ethManager, ipConfiguration); return true; } catch (Exception e) { e.printStackTrace(); return false; } } /**
     * 设置以太网静态IP地址
     *
     * @param address ip地址
     * @param mask    子网掩码
     * @param gate    网关
     * @param dns     dns
     */ public static boolean setEthernetStaticIp(Context context, String address, String mask, String gate, String dns) { try { Class<?> ethernetManagerCls = Class.forName("android.net.EthernetManager"); //获取EthernetManager实例 Object ethManager = context.getSystemService("ethernet"); //创建StaticIpConfiguration Object staticIpConfiguration = newStaticIpConfiguration(address, gate, mask, dns); //创建IpConfiguration Object ipConfiguration = newIpConfiguration(staticIpConfiguration); //获取EthernetManager的setConfiguration() Method setConfigurationMethod = ethernetManagerCls.getDeclaredMethod("setConfiguration", ipConfiguration.getClass()); //保存静态ip设置 saveIpSettings(context, address, mask, gate, dns); //设置静态IP setConfigurationMethod.invoke(ethManager, ipConfiguration); return true; } catch (Exception e) { e.printStackTrace(); return false; } } /**
     * 获取StaticIpConfiguration实例
     */ private static Object newStaticIpConfiguration(String address, String gate, String mask, String dns) throws Exception { Class<?> staticIpConfigurationCls = Class.forName("android.net.StaticIpConfiguration"); //实例化StaticIpConfiguration Object staticIpConfiguration = staticIpConfigurationCls.newInstance(); Field ipAddress = staticIpConfigurationCls.getField("ipAddress"); Field gateway = staticIpConfigurationCls.getField("gateway"); Field domains = staticIpConfigurationCls.getField("domains"); Field dnsServers = staticIpConfigurationCls.getField("dnsServers"); //设置ipAddress ipAddress.set(staticIpConfiguration, newLinkAddress(address, mask)); //设置网关 gateway.set(staticIpConfiguration, InetAddress.getByName(gate)); //设置掩码 domains.set(staticIpConfiguration, mask); //设置dns ArrayList<InetAddress> dnsList = (ArrayList<InetAddress>) dnsServers.get(staticIpConfiguration); dnsList.add(InetAddress.getByName(dns)); return staticIpConfiguration; } /**
     * 获取LinkAddress实例
     */ private static Object newLinkAddress(String address, String mask) throws Exception { Class<?> linkAddressCls = Class.forName("android.net.LinkAddress"); Constructor<?> linkAddressConstructor = linkAddressCls.getDeclaredConstructor(InetAddress.class, int.class); return linkAddressConstructor.newInstance(InetAddress.getByName(address), getPrefixLength(mask)); } /**
     * 获取IpConfiguration实例
     */ private static Object newIpConfiguration(Object staticIpConfiguration) throws Exception { Class<?> ipConfigurationCls = Class.forName("android.net.IpConfiguration"); Object ipConfiguration = ipConfigurationCls.newInstance(); //设置StaticIpConfiguration Field staticIpConfigurationField = ipConfigurationCls.getField("staticIpConfiguration"); staticIpConfigurationField.set(ipConfiguration, staticIpConfiguration); //获取ipAssignment、proxySettings的枚举值 Map<String, Object> ipConfigurationEnum = getIpConfigurationEnum(ipConfigurationCls); //设置ipAssignment Field ipAssignment = ipConfigurationCls.getField("ipAssignment"); ipAssignment.set(ipConfiguration, ipConfigurationEnum.get("IpAssignment.STATIC")); //设置proxySettings Field proxySettings = ipConfigurationCls.getField("proxySettings"); proxySettings.set(ipConfiguration, ipConfigurationEnum.get("ProxySettings.STATIC")); return ipConfiguration; } /**
     * 获取IpConfiguration的枚举值
     */ private static Map<String, Object> getIpConfigurationEnum(Class<?> ipConfigurationCls) { Map<String, Object> enumMap = new HashMap<>(); Class<?>[] enumClass = ipConfigurationCls.getDeclaredClasses(); for (Class<?> enumC : enumClass) { Object[] enumConstants = enumC.getEnumConstants(); if (enumConstants == null) continue; for (Object enu : enumConstants) { enumMap.put(enumC.getSimpleName() + "." + enu.toString(), enu); } } return enumMap; } /**
     * 保存静态ip设置
     */ private static void saveIpSettings(Context context, String address, String mask, String gate, String dns) { ContentResolver contentResolver = context.getContentResolver(); Settings.Global.putString(contentResolver, "ethernet_static_ip", address); Settings.Global.putString(contentResolver, "ethernet_static_mask", mask); Settings.Global.putString(contentResolver, "ethernet_static_gateway", gate); Settings.Global.putString(contentResolver, "ethernet_static_dns1", dns); } /**
     * 获取长度
     */ private static int getPrefixLength(String mask) { String[] strs = mask.split("\\."); int count = 0; for (String str : strs) { if (str.equals("255")) { ++count; } } return count * 8; } } 

• 使用只需调用方法即可：

//设置静态ip EthernetUtil.setEthernetStaticIp(context, "192.168.5.33", "255.255.255.0", "192.168.5.1", "8.8.8.8"); //设置动态获取ip EthernetUtil.setDynamicIp(context) 

最后：这个代码本人在Android7.0的原生系统验证是可以使用的，有需要的可以使用试试EthernetUtil源码下载地址

• 最后在推荐个好用的系统源码查看网址吧：Android 系统源码在线查看

本文地址：https://blog.csdn.net/a_zhon/article/details/108148055