How to get DhcpInfo() (gateway ip, netmask, dns, etc) of android device connected via Ethernet?
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();
But I still not found the way to get it if device connected via ethernet... Thanks
In your AndroidManifest.xml file
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
Your code:
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 {
}
Output
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.
来源：https://stackoverflow.com/questions/46065159/get-android-dhcpinfo-connected-via-ethernet