Android 5.1 以太网使用介绍

由于网卡操作的部分API在Android 5.1上没有暴露，我们可以采取两种方案，一是通过反射的方式获取相应的api，二是从系统中获取完整的framework.jar

1、设置以太网动态获取IP

EthernetManager mEthManager = null;
mEthManager  = (EthernetManager) context.getSystemService("ethernet");
mEthManager.setConfiguration(new IpConfiguration(IpConfiguration.IpAssignment.DHCP, IpConfiguration.ProxySettings.NONE,null,null));

2、设置以太网静态IP

 /**
     * 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 dns1     dns1
     */
    public static boolean setEthernetStaticIp(Context context, String address, String mask, String gate, String dns1, String dnsStr2) {
        try {
            EthernetManager mEthManager = null;
            mEthManager  = (EthernetManager) context.getSystemService("ethernet");
            StaticIpConfiguration mStaticIpConfiguration =new StaticIpConfiguration();
            IpConfiguration mIpConfiguration;
            Inet4Address inetAddr = getIPv4Address(address);
            int prefixLength = maskStr2InetMask(mask);
            InetAddress gatewayAddr =getIPv4Address(gate);
            InetAddress dnsAddr = getIPv4Address(dns1);

            if (inetAddr.getAddress().toString().isEmpty() || prefixLength ==0 || gatewayAddr.toString().isEmpty()
                    || dnsAddr.toString().isEmpty()) {
                Log.e(MainActivity.TAG,"ip,mask or dnsAddr is wrong");
                return false;
            }

            mStaticIpConfiguration.ipAddress = new LinkAddress(inetAddr, prefixLength);
            mStaticIpConfiguration.gateway=gatewayAddr;
            mStaticIpConfiguration.dnsServers.add(dnsAddr);

            if (dnsStr2 != null && !dnsStr2.isEmpty()) {
                mStaticIpConfiguration.dnsServers.add(getIPv4Address(dnsStr2));
            }
            mIpConfiguration=new IpConfiguration(IpConfiguration.IpAssignment.STATIC, IpConfiguration.ProxySettings.NONE,mStaticIpConfiguration,null);
            mEthManager.setConfiguration(mIpConfiguration);
            return true;
        } catch (Exception e) {
            return false;
        }
    }

3、获取以太网IP信息

public static int getNetInfo(Context context,String connectState,String ip,String mask,String gate,String dns1,String dns2)
{
    int nRet = -1;

    try{
        EthernetManager mEthManager = null;
        mEthManager  = (EthernetManager) context.getSystemService("ethernet");
        boolean useDhcp=(mEthManager.getConfiguration().ipAssignment == IpConfiguration.IpAssignment.DHCP) ? true : false;
        if (useDhcp)
        {
            connectState = "dhcp";
        }
        else
        {
            connectState = "static";
        }

        StaticIpConfiguration staticIpConfiguration=mEthManager.getConfiguration().getStaticIpConfiguration();

        if(staticIpConfiguration == null) {
            return nRet;
        }
        LinkAddress ipAddress = staticIpConfiguration.ipAddress;
        InetAddress gateway   = staticIpConfiguration.gateway;
        ArrayList dnsServers=staticIpConfiguration.dnsServers;

        if( ipAddress !=null) {
            ip=ipAddress.getAddress().getHostAddress();
           mask=interMask2String(ipAddress.getPrefixLength());
        }
        if(gateway !=null) {
            gate=gateway.getHostAddress();
        }
        dns1=dnsServers.get(0).getHostAddress();
        if(dnsServers.size() > 1) { /* 只保留两个*/
            dns2=dnsServers.get(1).getHostAddress();
        }
    }catch (Exception e){
        Log.w("EthernetIP", "getNetInfo() : e = " + e.toString());
    }

    return nRet;
}

以上就是Android 5.1上以太网使用的大致方法，小编已上传framework.jar，请自行下载