Question

我从RSS Feed获取字符串，有时会包含指向YouTube视频的链接。我已经能够从字符串中解析URL了。

我希望在WebView内部将网址替换为“链接到视频”，但点击此链接时，它应使用YouTube链接。

目前我更换字符串，但点击此字符串后，系统会转发新字符串，而不是YouTube网址。

我的代码：

String description = fFeed.getItem(fPos).getDescription();

    // get all links from the description string
    ArrayList<String> links_in_string = retrieveLinks(description);
    Log.d("debug", "All Links: " + links_in_string.toString());

    // search for YouTube links
    ArrayList<String> resList = new ArrayList<String>();
    String searchString = "www.youtube.com/watch?v=";

    for (String curVal : links_in_string) {
        if (curVal.contains(searchString)) {
            resList.add(curVal);
        }
    }
    Log.d("debug", "YouTube Links: " + resList.toString());

    // convert to single YouTube URL strings and replace
    // them in the description string
    Object[] mStringArray = resList.toArray();
    for (int i = 0; i < mStringArray.length; i++) {
        Log.d("string is", (String) mStringArray[i]);
        description = description.replace((String) mStringArray[i],
                "Link zum Video");
    }


/**
 * Retrieve all the links from the description string
 * of the RSS Feed
 */
private ArrayList<String> retrieveLinks(String text) {
    ArrayList<String> links = new ArrayList<String>();

    String regex = "\\(?\\b(http://|www[.])[-A-Za-z0-9+&@#/%?=~_()|!:,.;]*[-A-Za-z0-9+&@#/%=~_()|]";
    Pattern p = Pattern.compile(regex);
    Matcher m = p.matcher(text);
    while (m.find()) {
        String urlStr = m.group();
        if (urlStr.startsWith("(") && urlStr.endsWith(")")) {
            urlStr = urlStr.substring(1, urlStr.length() - 1);
        }
        links.add(urlStr);
    }
    return links;
}

更新

我必须每隔一次搜索字符串中出现的url。我试过这种方式，但现在它没有取代URL

// convert to single YouTube URL strings and replace
        // them in the description string
        Object[] mStringArray = resList.toArray();
        for (int i = 0; i < mStringArray.length; i++) {

            //replace every second URL by "Link zum Video"
            StringBuffer sb = new StringBuffer();
            Pattern p = Pattern.compile((String) mStringArray[i]);
            Matcher m = p.matcher(description);
            int count = 0;
            while (m.find()) {
                if (count++ % 2 != 0) {
                    m.appendReplacement(sb, "Link zum Video");
                }
            }
            m.appendTail(sb);
            description = sb.toString();

            Log.d("debug", "Description with replaced link: " + description);
        }

Answer 1

我没有测试它，但是使用锚标签可能会起作用：

description = description.replace((String) mStringArray[i],
                "<a href=\""+(String) mStringArray[i]+"\">Link zum Video</a>");

Answer 2

我使用RegEx解决了它：

String pattern = "(<a href=\".*?\">).*?(</a>)";
description = description.replaceAll(pattern, "$1Link zum Video$2");

Android：在WebView中更改YouTube链接名称

2 个答案: