public int saveExchangeRate(int currencyId, Money exchangeRate) {
    ContentValues contentValues = new ContentValues();
    contentValues.put(TableCurrencyFormats.BASECONVRATE, exchangeRate.toString());

    int result =
        mContext
            .getContentResolver()
            .update(
                mCurrencyTable.getUri(),
                contentValues,
                TableCurrencyFormats.CURRENCYID + "=?",
                new String[] {Integer.toString(currencyId)});

    return result;
  }
  private TableCurrencyFormats loadCurrencyInternal(String selection, String[] selectionArgs) {
    TableCurrencyFormats currency = mCurrencyTable;
    Cursor cursor =
        mContext
            .getContentResolver()
            .query(currency.getUri(), currency.getAllColumns(), selection, selectionArgs, null);
    if (cursor == null) return null;

    if (cursor.moveToNext()) {
      currency.setValueFromCursor(cursor);
    } else {
      currency = null;
    }
    cursor.close();

    return currency;
  }