// 檢測網絡 public static boolean checkNetworkAvailable(Context context) { ConnectivityManager connectivity = (ConnectivityManager) context  .getSystemService(Context.CONNECTIVITY_SERVICE); if (connectivity == null) {  return false; } else {  NetworkInfo[] info = connectivity.getAllNetworkInfo();  if (info != null) {  for (int i = 0; i < info.length; i++) {   if (info[i].getState() == NetworkInfo.State.CONNECTED) {   NetworkInfo netWorkInfo = info[i];   if (netWorkInfo.getType() == ConnectivityManager.TYPE_WIFI) {    return true;   } else if (netWorkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {    return true;   }   }  }  } } return false; }