[Android] 檢查網路連接狀態

public boolean checkNet() {
  // TODO Auto-generated method stub
  ConnectivityManager conManager = (ConnectivityManager)
 getSystemService(CONNECTIVITY_SERVICE);//
  NetworkInfo networInfo = 
conManager.getActiveNetworkInfo(); //

   if (networInfo == null || !networInfo.isAvailable()) {
   
   //do something 
  
   return true;
  }
  
 
  return false;
  
 }