Examples with SQLiteOpenHelper android.database.sqlite.SQLiteOpenHelper used on opensource projects

Example 46 with SQLiteOpenHelper

use of android.database.sqlite.SQLiteOpenHelper in project weex-example by KalicyZhou.

the class HistoryManager method buildHistory.

/**
   * <p>Builds a text representation of the scanning history. Each scan is encoded on one
   * line, terminated by a line break (\r\n). The values in each line are comma-separated,
   * and double-quoted. Double-quotes within values are escaped with a sequence of two
   * double-quotes. The fields output are:</p>
   *
   * <ol>
   *  <li>Raw text</li>
   *  <li>Display text</li>
   *  <li>Format (e.g. QR_CODE)</li>
   *  <li>Unix timestamp (milliseconds since the epoch)</li>
   *  <li>Formatted version of timestamp</li>
   *  <li>Supplemental info (e.g. price info for a product barcode)</li>
   * </ol>
   */
CharSequence buildHistory() {
    SQLiteOpenHelper helper = new DBHelper(activity);
    SQLiteDatabase db = null;
    Cursor cursor = null;
    try {
        db = helper.getWritableDatabase();
        cursor = db.query(DBHelper.TABLE_NAME, COLUMNS, null, null, null, null, DBHelper.TIMESTAMP_COL + " DESC");
        DateFormat format = DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.MEDIUM);
        StringBuilder historyText = new StringBuilder(1000);
        while (cursor.moveToNext()) {
            historyText.append('"').append(massageHistoryField(cursor.getString(0))).append("\",");
            historyText.append('"').append(massageHistoryField(cursor.getString(1))).append("\",");
            historyText.append('"').append(massageHistoryField(cursor.getString(2))).append("\",");
            historyText.append('"').append(massageHistoryField(cursor.getString(3))).append("\",");
            // Add timestamp again, formatted
            long timestamp = cursor.getLong(3);
            historyText.append('"').append(massageHistoryField(format.format(new Date(timestamp)))).append("\",");
            // Above we're preserving the old ordering of columns which had formatted data in position 5
            historyText.append('"').append(massageHistoryField(cursor.getString(4))).append("\"\r\n");
        }
        return historyText;
    } finally {
        close(cursor, db);
    }
}