Android determines network type and monitors network status

First, determine whether the network type is WiFi, or 3G, or 2G network

Connectivitymanager connectmgr = (connectivitymanager) this.getsystemservice (Context.connectivity_service);

  networkinfo info = connectmgr.getactivenetworkinfo ();  First, determine whether the network is WiFi, Be sure to make a non-null judgment before judging if there is no network connection Info ==nullinfo.gettype ()  == ConnectivityManager.TYPE_WIFI  II, Determine if the mobile network Info !=null && info.gettype ()  ==  connectivitymanager.type_ mobile  cell phone Network for detailed distinction:  info.getsubtype ()   Here use  getsubtype (), not  gettype (), GetType () returned is 0, Or 1, is the cell phone network or wifi info.getsubtype () value list as follows:           *  NETWORK_TYPE_CDMA  Network type is Cdma         * network_ type_edge  Network type is edge         * network_type_evdo_0  Network type is evdo0         * network_type_evdo_a  network type is EVDOA          * NETWORK_TYPE_GPRS  Network type is gprs          * network_type_hsdpa  Network type is Hsdpa         * network_ type_hspa  Network type is hspa         * network_type_hsupa  Network type is hsupa         * network_type_umts  network type is UMTS

Second, monitoring network status

The following code can monitor whether the network is connected, can do the corresponding operation according to the network connection;

1 Importcom.qdsj.hxcmjj.activity.MainActivity;2 3 ImportAndroid.app.Service;4 ImportAndroid.content.BroadcastReceiver;5 ImportAndroid.content.Context;6 Importandroid.content.Intent;7 ImportAndroid.content.IntentFilter;8 ImportAndroid.net.ConnectivityManager;9 ImportAndroid.net.NetworkInfo;Ten ImportAndroid.os.IBinder; One  A  Public classNetmonitorserviceextendsService { -  -      the      -     PrivateConnectivitymanager Connectivitymanager; -     Privatenetworkinfo info; -  +     PrivateBroadcastreceiver Mreceiver =NewBroadcastreceiver () { -  + @Override A          Public voidOnReceive (Context context, Intent Intent) { atString action =intent.getaction (); -             if(Action.equals (connectivitymanager.connectivity_action)) { -SYSTEM.OUT.PRINTLN ("Network status has changed"); -Connectivitymanager =(Connectivitymanager) Getsystemservice (context.connectivity_service); -info =Connectivitymanager.getactivenetworkinfo ();  -                 if(Info! =NULL&&info.isavailable ()) { inSYSTEM.OUT.PRINTLN ("Network Connection"); -Context.startactivity (NewIntent (context,mainactivity.class). Addflags (Intent.flag_activity_new_task)); to}Else { +SYSTEM.OUT.PRINTLN ("Network Disconnect"); -                 } the             } *         } $     };Panax Notoginseng  -  the @Override +      Publicibinder onbind (Intent Intent) { A         return NULL; the     } +  - @Override $      Public voidonCreate () { $         Super. OnCreate (); -Intentfilter Mfilter =NewIntentfilter (); - mfilter.addaction (connectivitymanager.connectivity_action); the registerreceiver (Mreceiver, mfilter); -System.out.println ("Turn on network monitoring service");Wuyi     } the      -      Wu      - @Override About          Public voidOnDestroy () { $             Super. OnDestroy (); - Unregisterreceiver (mreceiver); -         } -  A @Override +          Public intOnstartcommand (Intent Intent,intFlagsintStartid) { the             return Super. Onstartcommand (Intent, flags, startid); -         } $  the      the      the      the}