Merge "Compare ringtones using IDs." into qt-dev

     * @return The position of the {@link Uri}, or -1 if it cannot be found.

     */

    public int getRingtonePosition(Uri ringtoneUri) {

        if (ringtoneUri == null) return -1;

        final long ringtoneId = ContentUris.parseId(ringtoneUri);

        final Cursor cursor = getCursor();

        final int cursorCount = cursor.getCount();

        if (!cursor.moveToFirst()) {

            return -1;

        }

        // Only create Uri objects when the actual URI changes

        Uri currentUri = null;

        String previousUriString = null;

        for (int i = 0; i < cursorCount; i++) {

            String uriString = cursor.getString(URI_COLUMN_INDEX);

            if (currentUri == null || !uriString.equals(previousUriString)) {

                currentUri = Uri.parse(uriString);

        cursor.moveToPosition(-1);

        while (cursor.moveToNext()) {

            if (ringtoneId == cursor.getLong(ID_COLUMN_INDEX)) {

                return cursor.getPosition();

            }

            if (ringtoneUri.equals(ContentUris.withAppendedId(currentUri, cursor

                    .getLong(ID_COLUMN_INDEX)))) {

                return i;

        }

            cursor.move(1);

            previousUriString = uriString;

        }

        return -1;

    }