call log in android

public ArrayList<systemcalllog> queryAllCallLog() {
        ArrayList<systemcalllog> result = null;
        final ContentResolver contentResolver = mContext.getContentResolver();
        Cursor cursor = contentResolver.query(CallLog.Calls.CONTENT_URI, null,
                null, null, SystemCallLog.Columns.DATE
                        + " COLLATE LOCALIZED desc");
        if (null != cursor) {
            result = new ArrayList<systemcalllog>();
            SystemCallLog item = null;
            while (cursor.moveToNext()) {
                item = SystemCallLog.formatCursor(cursor);
                result.add(item);
            }
            cursor.close();
        }// end if
        return result;
    }
</systemcalllog></systemcalllog></systemcalllog>