public long insertStation(Station station) {
   ContentValues contentValue = new ContentValues();
   contentValue.put(COLUMN_STATE_NAME, station.getStateName());
   contentValue.put(COLUMN_STATION_ID, station.getStationId());
   contentValue.put(COLUMN_NAME, station.getName());
   return getWritableDatabase().insert(TABLE_STATION, null, contentValue);
 }