Android about judging if the app has a network

There are many applications in Android programming need to determine whether there is a network problem, now I would like to say about the network, the source code is as follows:.java /**     *  Check that the current network is available      *      *  @param  context      *  @return      */         public boolean isnetworkavailable (activity activity)     {         context context = activity.getapplicationcontext ();         //  get phone all connection management objects (including management of connections such as Wi-fi,net)          ConnectivityManager connectivityManager =  (Connectivitymanager)  context.getsystemservice (Context.connectivity_service);                 if  (connectivitymanager == null)         &nbsP {            return false;         }        else         {            //  Get Networkinfo Objects             NetworkInfo[]  Networkinfo = connectivitymanager.getallnetworkinfo ();                         if  (networkinfo != null && networkinfo.length > 0)              {                 for  (int i = 0; i <  networkinfo.length; i++)                 {                      System.out.println (i +  "= = = Status = = ="  + networkinfo[i].getstate ());                      System.out.println (i +  "= = = Type = = ="  + networkinfo[i].gettypename ());                     //  Determine if the current network state is a connection state                      if  (Networkinfo[i].getstate ()  == networkinfo.state.connected)                      {       &nbSp;                return  true;                     }                 }            }         }        return false;     }

This method is judged in the OnCreate () method, with the following code:. java@overrideprotected void OnCreate (Bundle savedinstancestate) {super.oncreate ( Savedinstancestate); Setcontentview (R.layout.activity_main); if (isnetworkavailable (maintivity.this) { Toast.maketext (This, "there are currently available networks!") ", Toast.length_long). Show ();} else{Toast.maketext (This, "No network at this moment!"  ", Toast.length_long). Show ();}} Additionally, you need to add permissions <!--allow apps to be networked--<uses-permission android:name= "Android.permission.INTERNET"/> <!--allow App Check network status--<uses-permission android:name= "Android.permission.ACCESS_NETWORK_STATE" ></ Uses-permission>

This article is from the "Android Network" blog, so be sure to keep this source http://3127279300.blog.51cto.com/10023287/1725343

Android about judging if the app has a network