如何在Android上找到非WiFi连接的DHCP信息？

Question

我有Android设备，它通过以太网连接到网络。如何获取此连接的DHCP信息？

Answer 1

您应该可以使用ConnectivityManager.getAllNetworks()来获取连接的网络阵列： http://developer.android.com/reference/android/net/ConnectivityManager.html#getAllNetworks()

然后Network.getSocketFactory()用于您的已连接网络。 SocketFactory将允许您检查可以在连接上创建的Socket。

http://developer.android.com/reference/android/net/Network.html#getSocketFactory()

由此，只需从Socket创建一个SocketFactory.createSocket()即可获得您想要的信息，例如Socket.getLocalSocketAddress()等。

http://developer.android.com/reference/javax/net/SocketFactory.html#createSocket()

http://developer.android.com/reference/java/net/Socket.html

Answer 2

对于非Wifi，没有WifiManager类。

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