android通过EthernetManager删除指定的有线纹路静态ip不影响其他的静态ip，如果静态ip删除玩了就设置为DHCP，请提供一个完整可用的函数实现上述功能

在Android中，要实现这个功能，你需要访问`EthernetManager`并管理网络接口的状态。不过请注意，由于隐私政策和API限制，直接操作设备的IP地址可能受限于应用权限。这里我将提供一个简化的示例函数，它展示了如何在一个理想化的环境中操作静态IP配置，实际项目中可能需要适配官方提供的网络管理API：

import android.net.ConnectivityManager;
import android.net.EthernetManager;
import android.net.LinkAddress;

public class EthernetStaticIpHelper {

    private ConnectivityManager connectivityManager;
    private EthernetManager ethernetManager;

    public EthernetStaticIpHelper(Context context) {
        connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        ethernetManager = (EthernetManager) context.getSystemService(Context.ETHernet_SERVICE);
    }

    /**
     * 删除指定的有线连接静态IP，并切换到自动获取IP（DHCP）
     *
     * @param interfaceName 网络接口名称（如 "eth0" 或 "wlan0")
     */
    public void deleteAndSetDhcp(String interfaceName) {
        if (checkInterfaceExists(interfaceName)) {
            LinkProperties linkProperties = getLinkProperties(interfaceName);
            // 如果存在静态IP，则尝试删除
            if (linkProperties.getLinkAddresses().size() > 0) {
                LinkAddress staticIp = findStaticIp(linkProperties);
                if (staticIp != null) {
                    LinkAddress dhcpAddress = new LinkAddress(LinkAddress.ANY_ADDRESS, 0);
                    try {
                        ethernetManager.setLinkProperties(interfaceName, linkProperties.removeLinkAddress(staticIp));
                    } catch (Exception e) {
                        Log.e("EthernetHelper", "Failed to remove static IP: ", e);
                    }
                }
            }
            // 设置为动态IP获取
            setDhcpMode(interfaceName);
        }
    }

    private boolean checkInterfaceExists(String interfaceName) {
        for (String iface : connectivityManager.getAllNetworkInterfaces()) {
            if (iface.equals(interfaceName)) return true;
        }
        return false;
    }

    private LinkProperties getLinkProperties(String interfaceName) {
        NetworkInfo networkInfo = connectivityManager.getLinkProperties(interfaceName);
        return networkInfo.getLinkProperties();
    }

    private LinkAddress findStaticIp(LinkProperties properties) {
        for (LinkAddress address : properties.getLinkAddresses()) {
            if (address.isLinkLocalAddress()) continue; // ignore link-local addresses
            if (address.getAddress().toString().startsWith("192.168.")) { // assuming a static IP starts with a local network prefix
                return address;
            }
        }
        return null;
    }

    private void setDhcpMode(String interfaceName) {
        NetworkRequest request = new NetworkRequest.Builder()
                .addTransportType(NetworkCapabilities.TRANSPORT_ETHERNET)
                .build();
        try {
            connectivityManager.requestNetwork(request, new ConnectivityManager.NetworkCallback() {
                @Override
                public void onAvailable(Network network) {
                    // 网络已连接，设置为DHCP
                    LinkConfiguration config = new LinkConfiguration();
                    config.ipAssignment = IpAssignment.DHCP;
                    ethernetManager.configureInterface(interfaceName, config);
                }
            });
        } catch (IOException e) {
            Log.e("EthernetHelper", "Failed to set DHCP mode: ", e);
        }
    }