Android中判断网络是否连接实例详解

publicclassConnectionDetector {

  privateContext _context;

  publicConnectionDetector(Context context){

    this._context = context;

  }

  publicbooleanisConnectingToInternet(){

    ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);

     if(connectivity !=null) 

     {

       NetworkInfo[] info = connectivity.getAllNetworkInfo();

       if(info !=null) 

         for(inti =0; i < info.length; i++) 

           if(info[i].getState() == NetworkInfo.State.CONNECTED)

           {

             returntrue;

           }

     }

     returnfalse;

  }

ConnectionDetector cd =newConnectionDetector(getApplicationContext()); 

Boolean isInternetPresent = cd.isConnectingToInternet();//