Android String to URL Convert getDomain(String url)

Description

get Domain

License

Open Source License

Declaration

public static String getDomain(String url) 

Method Source Code

//package com.java2s;

public class Main {
    public static String getDomain(String url) {
        if (isEmptyOrNull(url))
            return null;
        String domain;//from   www  .j a  va2 s .c o  m
        try {
            int pos = url.indexOf("//");
            domain = url.substring(pos + 2);
            int endpos = domain.indexOf("/");

            if (url.indexOf("http") > -1) {
                domain = "http://" + domain.substring(0, endpos);
            } else {
                domain = "https://" + domain.substring(0, endpos);
            }
        } catch (StringIndexOutOfBoundsException e) {
            return null;
        } catch (Exception e) {
            return null;
        }
        return domain;
    }

    public static boolean isEmptyOrNull(String str) {
        return str == null || str.length() == 0
                || str.contentEquals("null") || str.trim().equals("");
    }

    public static String substring(String str, int srcPos,
            int specialCharsLength) {
        if (str == null || "".equals(str) || specialCharsLength < 1) {
            return "";
        }
        if (srcPos < 0) {
            srcPos = 0;
        }
        if (specialCharsLength <= 0) {
            return "";
        }
        char[] chars = str.toCharArray();
        if (srcPos > chars.length) {
            return "";
        }

        int strLength = 0;
        for (int i = 0; i < chars.length; i++) {
            strLength += getSpecialCharLength(chars[i]);
        }

        if (strLength < specialCharsLength) {
            return str;
        }
        int charsLength = getCharsLength(chars, specialCharsLength);
        return new StringBuffer()
                .append(new String(chars, srcPos, charsLength))
                .append("...").toString();
    }

    private static int getSpecialCharLength(char c) {
        if (isLetter(c)) {
            return 1;
        } else {
            return 2;
        }
    }

    private static int getCharsLength(char[] chars, int specialCharsLength) {
        int count = 0;
        int normalCharsLength = 0;
        for (int i = 0; i < chars.length; i++) {
            int specialCharLength = getSpecialCharLength(chars[i]);
            if (count <= specialCharsLength - specialCharLength) {
                count += specialCharLength;
                normalCharsLength++;
            } else {
                break;
            }
        }
        return normalCharsLength;
    }

    public static boolean isLetter(char c) {
        int k = 0x80;
        return c / k == 0 ? true : false;
    }
}

Related

1. isUrl(String s)
2. isUrl(String str)
3. isUrl(String s)
4. isUrlValid(String str)
5. isHttpUrl(String input)
6. findUrl(StringBuilder sb)
7. isImageUrl(String imgUrl)
8. getBaseUrl(String pageUrl)
9. getYoutubeId(String url)