Android URL Create appendParameter(String url, String name, String value)

Description

append Parameter

License

Open Source License

Declaration

public static String appendParameter(String url, String name,
            String value) 

Method Source Code

//package com.java2s;
/*//from w w w  .j a v  a  2 s .  com
 * Copyright (C) 2010 Geometer Plus <contact@geometerplus.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

public class Main {
    private static final char[] hexDigits = { '0', '1', '2', '3', '4', '5',
            '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };

    public static String appendParameter(String url, String name,
            String value) {
        if (name == null || value == null) {
            return url;
        }
        value = value.trim();
        if (value.length() == 0) {
            return url;
        }
        value = htmlEncode(value);
        int index = url.indexOf('?', url.lastIndexOf('/') + 1);
        char delimiter = (index == -1) ? '?' : '&';
        while (index != -1) {
            final int start = index + 1;
            final int eqIndex = url.indexOf('=', start);
            index = url.indexOf('&', start);
            if (eqIndex != -1 && url.substring(start, eqIndex).equals(name)) {
                final int end = (index != -1 ? index : url.length());
                if (url.substring(eqIndex + 1, end).equals(value)) {
                    return url;
                } else {
                    return new StringBuilder(url).replace(eqIndex + 1, end,
                            value).toString();
                }
            }
        }
        return new StringBuilder(url).append(delimiter).append(name)
                .append('=').append(value).toString();
    }

    public static String htmlEncode(String stringToEncode) {
        if (stringToEncode == null) {
            return null;
        }
        StringBuilder encodedString = new StringBuilder();
        for (int i = 0; i < stringToEncode.length(); ++i) {
            final char ch = stringToEncode.charAt(i);
            if (Character.isLetterOrDigit(ch) || (ch == '.') || (ch == '~')
                    || (ch == '-') || (ch == '_')) {
                encodedString.append(ch);
            } else {
                try {
                    byte[] bytes = String.valueOf(ch).getBytes("UTF-8");
                    for (byte b : bytes) {
                        encodedString.append('%').append(hexDigits[b / 16])
                                .append(hexDigits[b % 16]);
                    }
                } catch (java.io.UnsupportedEncodingException ex) {
                }
            }
        }
        return encodedString.toString();
    }
}

Related

1. createUrl(final String rootUrl, final String indivisualHost, final String featurePath, final int index, List pairs)
2. buildBodyParameterString( List> parameters)
3. buildParameterString( List> parameters, String delimiter, boolean quote)
4. buildUrlParameterString( List> parameters)
5. appendParameter(String url, String name, String value)
6. geoCoderUrlBuilder(double lat, double lng)
7. makeUrl(String inBaseUrl, String inUrl)