通过以太网获取连接的Android DhcpInfo [英] Get Android DhcpInfo connected via Ethernet

问题描述

如何获取通过以太网连接的android设备的DhcpInfo()(网关ip，netmask，dns等)?

How to get DhcpInfo() (gateway ip, netmask, dns, etc) of android device connected via Ethernet?

如果设备通过Wifi并使用ACCESS_WIFI_STATE权限进行连接，我知道如何获取它:

I know how to get it if device connected via Wifi and using ACCESS_WIFI_STATE permission:

 WifiManager wifi = (WifiManager) context.getSystemService(Service.WIFI_SERVICE);
 DhcpInfo dhcp = wifi.getDhcpInfo();

但是如果设备通过以太网连接，我仍然找不到找到它的方法... 谢谢

But I still not found the way to get it if device connected via ethernet... Thanks

推荐答案

在您的 AndroidManifest.xml 文件中

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

您的代码:

    ConnectivityManager connectivityManager = (ConnectivityManager) getApplicationContext().getSystemService(Service.CONNECTIVITY_SERVICE);

                /* you can print your active network via using below */
                Log.i("myNetworkType: ", connectivityManager.getActiveNetworkInfo().getTypeName());
                WifiManager wifiManager= (WifiManager) getApplicationContext().getSystemService(getApplicationContext().WIFI_SERVICE);


                Log.i("routes ", connectivityManager.getLinkProperties(connectivityManager.getActiveNetwork()).getRoutes().toString());
                Log.i("domains ", connectivityManager.getLinkProperties(connectivityManager.getActiveNetwork()).getDomains().toString());
                Log.i("ip address ", connectivityManager.getLinkProperties(connectivityManager.getActiveNetwork()).getLinkAddresses().toString());
                Log.i("dns address ", connectivityManager.getLinkProperties(connectivityManager.getActiveNetwork()).getDnsServers().toString());



                if(connectivityManager.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_WIFI) {
                    Log.i("myType ", "wifi");
                    DhcpInfo d =wifiManager.getDhcpInfo();
                    Log.i("info", d.toString()+"");
                }
                else if(connectivityManager.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_ETHERNET) {
/* there is no EthernetManager class, there is only WifiManager. so, I used this below trick to get my IP range, dns, gateway address etc */

                    Log.i("myType ", "Ethernet");
                    Log.i("routes ", connectivityManager.getLinkProperties(connectivityManager.getActiveNetwork()).getRoutes().toString());
                    Log.i("domains ", connectivityManager.getLinkProperties(connectivityManager.getActiveNetwork()).getDomains().toString());
                    Log.i("ip address ", connectivityManager.getLinkProperties(connectivityManager.getActiveNetwork()).getLinkAddresses().toString());
                    Log.i("dns address ", connectivityManager.getLinkProperties(connectivityManager.getActiveNetwork()).getDnsServers().toString());

                }
                else {

                }

输出

您无法得知您是通过WifiManager通过wifi还是通过网络连接的，因为WifiManager仅适用于wifi.您必须使用ConnectivityManager.我在合并WifiManager和ConnectivityManager的地方再次更新了代码，以产生所需的结果.

You can't reach to know whether you are connected via wifi or network using WifiManager as WifiManager only deals with wifi. You have to use ConnectivityManager. I updated the code again where I merged WifiManager and ConnectivityManager to produce the result that you wanted.

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