How to Ping External IP from Java Android

public static boolean executeCommand(){
   System.out.println("executeCommand");   
   Runtime runtime;  
   runtime = Runtime.getRuntime();   
   try  
   {
      Process  mIpAddrProcess = runtime.exec("/system/bin/ping -c 1 8.8.8.8");      
   int mExitValue = mIpAddrProcess.waitFor();      
   System.out.println(" mExitValue "+mExitValue);     
   if(mExitValue==0)
   {
         return true;      
   }
  else
  {
         return false;    
   }
   }
   catch (InterruptedException ignore)
   {
      ignore.printStackTrace();     
   System.out.println
   (" Exception:"+ignore);  
   }
   catch (IOException ex)
   {
      ex.printStackTrace();    
   System.out.println(" Exception:"+ex);  
   }
   return false;}