public void deleteTable() {
    try {
      dbAdapter.createDataBase();
    } catch (IOException e) {
      Log.i("*** Delete ", e.getMessage());
    }
    dbAdapter.deleteAll("speakerSeminar");
    // int id=dbAdapter.deleteRecordInDB("BOOK", "1", new String[]{"1"});
    // Toast.makeText(view, String.valueOf(n),Toast.LENGTH_SHORT).show();

  }