Public Code Reference (Connectivitymanager)

 PackageCom.fredric.util;ImportAndroid.content.Context;ImportAndroid.net.ConnectivityManager;ImportAndroid.net.NetworkInfo;Importandroid.net.NetworkInfo.State;/*-* Network Tool class*/ Public classNetUtils {//determine if the network is connected     Public Static Booleanisconnected (Context context) {Connectivitymanager Connectivity=(Connectivitymanager) context. Getsystemservice (Context.connectivity_service); //five states of WLAN//1, show that the connection has been saved, but the title bar does not, that is, no physical connection on the output as: Not Connect, available//2, show the connection is saved, the title bar also has a connected icon, the output is: Connect, available//3, select Do not save after output as: Not Connect, available//4, select connection, output when acquiring IP address: Not connect, not available//5. After connection, the output is: Connect, available        if(NULL!=connectivity) {Networkinfo Info=Connectivity.getactivenetworkinfo (); if(NULL! = Info &&info.isconnected ()) {                return true; }        }                return false; }        //determine if the WiFi connection     Public Static BooleanIswificonnect (Context context) {Connectivitymanager Connectivity=(Connectivitymanager) context. Getsystemservice (Context.connectivity_service); if(NULL!=connectivity) { State State=connectivity. Getnetworkinfo (Connectivitymanager.type_wifi). GetState (); if(state = =state.connected) {                return true; }        }                return false; }        //determine if GPRS is connected     Public Static BooleanIsgprsconnect (Context context) {Connectivitymanager Connectivity=(Connectivitymanager) context. Getsystemservice (Context.connectivity_service); if(NULL!=connectivity) { State State=connectivity. Getnetworkinfo (Connectivitymanager.type_mobile). GetState (); if(state = =state.connected) {                return true; }        }                return false; }}

Public Code Reference (Connectivitymanager)