android-determine if the current network is available

1. Claim Permissions <uses-permission android:name= "Android.permission.ACCESS_NETWORK_STATE"/>

2. Network Detection class

 Public classNetworkdetector {/**Network type is unknown*/     Public Static Final intNetwork_type_unknown = 0; /**Current network is GPRS*/     Public Static Final intNetwork_type_gprs = 1; /**Current network is EDGE*/     Public Static Final intNetwork_type_edge = 2; /**Current network is UMTS*/     Public Static Final intNETWORK_TYPE_UMTS = 3; /**Current Network is Cdma:either is95a or is95b*/     Public Static Final intNETWORK_TYPE_CDMA = 4; /**Current Network is EVDO revision 0*/     Public Static Final intNetwork_type_evdo_0 = 5; /**Current Network is EVDO revision A*/     Public Static Final intNetwork_type_evdo_a = 6; /**Current network is 1xRTT*/     Public Static Final intNetwork_type_1xrtt = 7; /**Current network is HSDPA*/     Public Static Final intNETWORK_TYPE_HSDPA = 8; /**Current network is HSUPA*/     Public Static Final intNetwork_type_hsupa = 9; /**Current network is HSPA*/     Public Static Final intNetwork_type_hspa = 10; /**Current network is IDen*/     Public Static Final intNetwork_type_iden = 11; /**Current Network is EVDO revision B*/     Public Static Final intNetwork_type_evdo_b = 12; /**Current network is LTE*/     Public Static Final intNetwork_type_lte = 13; /**Current network is EHRPD*/     Public Static Final intNETWORK_TYPE_EHRPD = 14; /**Current network is hspa+*/     Public Static Final intNETWORK_TYPE_HSPAP = 15; /**Unknown Network class. {@hide}*/     Public Static Final intNetwork_class_unknown = 0; /**Class of broadly defined "2G" networks. {@hide}*/     Public Static Final intNetwork_class_2_g = 1; /**Class of broadly defined "3G" networks. {@hide}*/     Public Static Final intNetwork_class_3_g = 2; /**Class of broadly defined "4G" networks. {@hide}*/     Public Static Final intNetwork_class_4_g = 3; /**Class of broadly defined "WIFI" networks. {@hide}*/     Public Static Final intNetwork_class_wifi = 4; /**Class of broadly defined "nonet" networks. {@hide}*/     Public Static Final intNetwork_class_nonet = 5; /*** Determine if the current network is available * *@paramContext *@returntrue: Available, false: unavailable;*/     Public Static Booleanisavailable (Context context) {Connectivitymanager Manager=(Connectivitymanager) context. Getsystemservice (Context.connectivity_service); if(Manager = =NULL) {            return false; } networkinfo Networkinfo=Manager.getactivenetworkinfo (); //networkinfo.isavailable () returns False if the network is available to return true.         if(Networkinfo = =NULL|| !networkinfo.isavailable ()) {            return false; } Else {            return true; }    }    /*** Determine the current network status * *@paramContext *@return0, unknown, 1, 2G, 2, 3G, 3, 4G, 4, WiFi, 5, nonet;*/     Public Static intGetnetworktype (Context context) {Connectivitymanager Manager=(Connectivitymanager) context. Getsystemservice (Context.connectivity_service); if(Manager = =NULL) {            returnnetwork_class_nonet; } networkinfo Networkinfo=Manager.getactivenetworkinfo (); if(Networkinfo = =NULL|| !networkinfo.isavailable ()) {            returnnetwork_class_nonet; }        if(Networkinfo.gettype () = =Connectivitymanager.type_wifi) {            returnNetwork_class_wifi; } Else {            returnGetnetworkclass ((telephonymanager) context. Getsystemservice (Context.telephony_service))        . Getnetworktype ()); }    }     Public Static intGetnetworkclass (intNetworktype) {        Switch(networktype) { CaseNetwork_type_gprs: CaseNetwork_type_edge: CaseNETWORK_TYPE_CDMA: CaseNetwork_type_1xrtt: CaseNetwork_type_iden:returnNetwork_class_2_g;  CaseNetwork_type_umts: Casenetwork_type_evdo_0: Casenetwork_type_evdo_a: CaseNETWORK_TYPE_HSDPA: CaseNetwork_type_hsupa: CaseNetwork_type_hspa: CaseNetwork_type_evdo_b: CaseNETWORK_TYPE_EHRPD: CaseNETWORK_TYPE_HSPAP:returnNetwork_class_3_g;  CaseNetwork_type_lte:returnNetwork_class_4_g; default:            returnNetwork_class_unknown; }    }}

android-determine if the current network is available