@Override
  public void onItem(View caller) {
    int position = mWifiListView.getChildLayoutPosition(caller);
    ScanResult scanResult = mWifiListAdapter.getItem(position);

    Intent intent = new Intent(this, ApConnectActivity.class);
    intent.putExtra("ssid", scanResult.SSID);
    intent.putExtra("node_key", node_key);
    intent.putExtra("node_sn", node_sn);
    startActivity(intent);
  }
 private void refreshWifiList() {
   mWifiListAdapter.updateAll(getWifiExceptPionList());
 }