Question

我想在字符串中将所有主题标签设置为小写：

＆＃34;你好我是一个男人 #Alelete 等我要做运动 #NeverGiveUp ＆＃34;

应该成为：

＆＃34;你好我是一个男人 #athlete 等我要去做运动 #nevergiveup ＆＃34;

Answer 1

如果您的问题是如何将所有内容转换为简单字母希望这有帮助

String myString = "HashTag";
  String myNewSimpleLetterString = myString.substring(0,5).toLowerCase(); //subString will get the characters from 0 - 5

Answer 2

试用此代码

只需将字符串传递给此方法，此方法将返回格式化的字符串

public static String changeFormat(String beforeFormatStr) {
    String[] arrStr = beforeFormatStr.split(" ");
    String afterFormatStr = "";
    int wordPos = 0;
    for (String word : arrStr) {
        String changeStr = word;
        if (word.contains("#")) {
            changeStr = word.toLowerCase();
        }
        if (wordPos == 0) {
            afterFormatStr += changeStr;
        } else {
            afterFormatStr += " " + changeStr;
        }
        wordPos++;
    }
    return afterFormatStr;
}

Answer 3

您可以使用正则表达式查找和替换小写标签。喜欢：

    String line = "Hello I'm a men #Athlete et I'm going to do sport #NeverGiveUp";
    String regEx = "\\S*#(?:\\[[^\\]]+\\]|\\S+)"; //Regular expression for matching hashtag

    StringBuffer sb = new StringBuffer();
    Pattern p = Pattern.compile(regEx);
    Matcher m = p.matcher(line);

    while (m.find())
    {
        // Avoids throwing a NullPointerException in the case that you
        // Don't have a replacement defined in the map for the match
        String repString = m.group();
        if (repString != null)
            repString = repString.toLowerCase();
            m.appendReplacement(sb, repString);
    }
    m.appendTail(sb);
    String replacedHashtag = sb.toString();

Answer 4

Hash不是字符串，因此您必须使用Regx matcher和Pattern来实现此目的。

 List<String> obtained_hashwords = new ArrayList<>();

        String text_data = "Hello I'm a men #Athlete et I'm going to do sport #NeverGiveUp  and I want to format this string";


        Pattern pattern = Pattern.compile("#\\w+");
        Matcher matcher = pattern.matcher(text_data);
        while (matcher.find())
        {
            obtained_hashwords.add(matcher.group());
            Log.d("Hash word",matcher.group());

        }
        for (String obtained_hashword:obtained_hashwords)
        {
             String no_hash = obtained_hashword.replace("#","");
             String lower_case_word = "#"+no_hash.toLowerCase();
          text_data  = text_data.replace(obtained_hashword,lower_case_word);
        }

        Log.d("changed line",text_data);

Android：如何在我的字符串中以小写字母设置子字符串？

4 个答案: