Android 如何从字符串中删除动态字符字符串?
我是android开发的新手,我正在尝试从字符串中删除一个动态字符字符串。我的字符串:Android 如何从字符串中删除动态字符字符串?,android,regex,string,replace,character,Android,Regex,String,Replace,Character,我是android开发的新手,我正在尝试从字符串中删除一个动态字符字符串。我的字符串: "Beginning of String....<img src="http://webaddress.com" height="1" width="1"/>" 我想删除“<”、“>”以及它们之间的所有内容。我想要的只是“字符串的开头…”到目前为止,我已经尝试过了,但没有成功 description = description.replaceFirst("(?s)(&am
"Beginning of String....<img src="http://webaddress.com" height="1" width="1"/>"
我想删除“<”、“>”以及它们之间的所有内容。我想要的只是“字符串的开头…”到目前为止,我已经尝试过了,但没有成功
description = description.replaceFirst("(?s)(<)(.*?)(>)","$1$3");
我也在一根类似的绳子上试过,效果很好,所以我不明白我做错了什么
description = description.replaceFirst("(?s)(<sub>)(.*?)(</sub>)","$1$3");
description=description.replaceFirst((?s)(*?),“$1$3”);
我的班级
public class RssReader {
private final static String BOLD_OPEN = "<B>";
private final static String BOLD_CLOSE = "</B>";
private final static String BREAK = "<BR>";
private final static String ITALIC_OPEN = "<I>";
private final static String ITALIC_CLOSE = "</I>";
private final static String SMALL_OPEN = "<SMALL>";
private final static String SMALL_CLOSE = "</SMALL>";
public static List<JSONObject> getLatestRssFeed(){
String feed = "http://feeds.feedburner.com/MetalMarketCommentary";
//http://globoesporte.globo.com/dynamo/futebol/times/vasco/rss2.xml
//http://feeds.feedburner.com/GoldMoneyGoldResearch +
//http://feeds.feedburner.com/GoldsilvercomNews +
//http://feed43.com/7466558277232702.xml
//http://feeds.feedburner.com/SilverGoldDaily
//http://feeds.feedburner.com/MetalMarketCommentary
//http://link.brightcove.com/services/player/bcpid1683318714001?bckey=AQ~~,AAAAC59qSJk~,vyxcsD3OtBPHZ2UIrFX2-wdCLTYNyMNn&bclid=1644543007001&bctid=1854182861001
RSSHandler rh = new RSSHandler();
List<Article> articles = rh.getLatestArticles(feed);
Log.e("RSS ERROR", "Number of articles " + articles.size());
return fillData(articles);
}
private static List<JSONObject> fillData(List<Article> articles) {
List<JSONObject> items = new ArrayList<JSONObject>();
for (Article article : articles) {
JSONObject current = new JSONObject();
try {
buildJsonObject(article, current);
} catch (JSONException e) {
Log.e("RSS ERROR", "Error creating JSON Object from RSS feed");
}
items.add(current);
}
return items;
}
private static void buildJsonObject(Article article, JSONObject current) throws JSONException {
String title = article.getTitle();
String description = article.getDescription();
description = description.replaceFirst("(?s)(<sub>)(.*?)(</sub>)","$1$3");
int start = description.indexOf(".&");
description= description.substring(0, start);
String date = article.getPubDate();
String imgLink = article.getImgLink();
StringBuffer sb = new StringBuffer();
sb.append(BOLD_OPEN).append(title).append(BOLD_CLOSE);
sb.append(BREAK);
sb.append(description);
sb.append(BREAK);
sb.append(SMALL_OPEN).append(ITALIC_OPEN).append(date).append(ITALIC_CLOSE).append(SMALL_CLOSE);
current.put("text", Html.fromHtml(sb.toString()));
current.put("imageLink", imgLink);
}
}
公共类RssReader{
私有最终静态字符串BOLD_OPEN=“”;
私有最终静态字符串BOLD_CLOSE=“”;
私有最终静态字符串中断=“
”;
私有最终静态字符串ITALIC_OPEN=“”;
私有最终静态字符串ITALIC_CLOSE=“”;
私有最终静态字符串SMALL_OPEN=“”;
私有最终静态字符串小_CLOSE=“”;
公共静态列表getLatestRssFeed(){
字符串馈送=”http://feeds.feedburner.com/MetalMarketCommentary";
//http://globoesporte.globo.com/dynamo/futebol/times/vasco/rss2.xml
//http://feeds.feedburner.com/GoldMoneyGoldResearch +
//http://feeds.feedburner.com/GoldsilvercomNews +
//http://feed43.com/7466558277232702.xml
//http://feeds.feedburner.com/SilverGoldDaily
//http://feeds.feedburner.com/MetalMarketCommentary
//http://link.brightcove.com/services/player/bcpid1683318714001?bckey=AQ~~,AAAAC59qSJk~,VYXSD3OTBPHZ2UIRFX2 wdCLTYNyMNn&bclid=1644543007001&bctid=185418261001
RSSHandler rh=新的RSSHandler();
列表文章=rh.getLatestArticles(提要);
Log.e(“RSS错误”,“文章数”+articles.size());
返回数据(文章);
}
私有静态列表数据(列表项目){
列表项=新建ArrayList();
用于(第条:第条){
JSONObject当前=新的JSONObject();
试一试{
buildJsonObject(文章,当前);
}捕获(JSONException e){
e(“RSS错误”,“从RSS提要创建JSON对象时出错”);
}
项目。添加(当前);
}
退货项目;
}
私有静态void buildJsonObject(Article-Article,JSONObject-current)抛出JSONException{
String title=article.getTitle();
字符串描述=article.getDescription();
description=description.replaceFirst(“(?s)()(*?)”,“$1$3”);
int start=description.indexOf(“.&”);
description=description.substring(0,start);
字符串日期=article.getPubDate();
字符串imgLink=article.getImgLink();
StringBuffer sb=新的StringBuffer();
sb.append(加粗打开)。append(标题)。append(加粗关闭);
某人追加(中断);
某人附加(描述);
某人追加(中断);
sb.append(小开)。append(斜体开)。append(日期)。append(斜体闭)。append(小闭);
current.put(“text”,Html.fromHtml(sb.toString());
当前输入(“imageLink”,imgLink);
}
}
我正在解析的XML
<item>
<title>Gold Market Recap Report</title>
<link>http://feedproxy.google.com/~r/MetalMarketCommentary/~3/jGYtkXdSKWs/mid-session-gold_703.html</link>
<description><img src="http://www.cmegroup.com/images/1x1trans.gif?destination=http://www.cmegroup.com/education/market-commentary/metals/2012/09/mid-session-gold_703.html" alt=""/>For the week December gold forged a trading range of roughly $37 an ounce. With gold prices attimes seemingly on the rocks and poised for a downside washout it was a change of pace to see afresh upside breakout in the Friday morning trade....<img src="http://feeds.feedburner.com/~r/MetalMarketCommentary/~4/jGYtkXdSKWs" height="1" width="1"/></description>
<pubDate>Fri, 21 Sep 2012 19:50:37 GMT</pubDate>
<guid isPermaLink="false">http://www.cmegroup.com/education/market-commentary/metals/2012/09/mid-session-gold_703.html?source=rss</guid>
<dc:date>2012-09-21T19:50:37Z</dc:date>
<feedburner:origLink>http://www.cmegroup.com/education/market-commentary/metals/2012/09/mid-session-gold_703.html?source=rss</feedburner:origLink>
</item>
黄金市场回顾报告
http://feedproxy.google.com/~r/metalmarketcommentation/~3/jGYtkXdSKWs/mid-session-gold_703.html
img src=”http://www.cmegroup.com/images/1x1trans.gif?destination=http://www.cmegroup.com/education/market-Commentation/metals/2012/09/mid-session-gold_703.html“alt=”“/12月一周黄金的交易区间约为每盎司37美元。随着金价时节似乎处于震荡状态,并准备好了下跌的洗牌,周五早盘再次出现上涨突破是一种节奏的变化……img src=”http://feeds.feedburner.com/~r/metalmarketcommentation/~4/jGYtkXdSKWs“height=“1”width=“1”/
2012年9月21日星期五19:50:37 GMT
http://www.cmegroup.com/education/market-commentary/metals/2012/09/mid-session-gold_703.html?source=rss
2012-09-21T19:50:37Z
http://www.cmegroup.com/education/market-commentary/metals/2012/09/mid-session-gold_703.html?source=rss
这将删除<和>之间的任何内容,包括它们。您不必使用正则表达式来执行此操作 创建一个方法,该方法将查找并删除以
开头、以
结尾的子字符串,并在循环中运行它
String mstring = "Beginning of String....<img src="http://webaddress.com" height="1" width="1"/>";
// You'll need to escape the double quotes if you're explicitly setting the string
public boolean containsTags()
{
boolean lt, gt;
lt = mstring.contains("<");
gt = mstring.contains(">");
return (lt || gt);
}
public void removeTags()
{
int indexof_lt, indexof_gt;
indexof_lt = mstring.indexOf("<");
indexof_gt = mstring.indexOf(">");
String str_first, str_last;
str_first = mstring.substring(0, indexof_lt);
str_last = mstring.substring(indexof_gt + indexof_gt.length);
mstring = str_first + str_last;
}
public void removeAllTags()
{
while(containsTags)
{
removeTags();
}
}
(1) 你说“没有成功”是什么意思?(2) 你为什么写
<
和>
而不是
和
?(3) 您说您想删除<
和>
,但您的代码将(<)(…)(>)
替换为$1$3
,即<
。为什么会这样?@ruakh我对regex不熟悉,从我读到的所有教程中,我的理解是,代码会删除“字符串开头”major&;失败
感谢您的回复。它需要更具适应性,因为我正在将xml解析为字符串,然后附加html标记,这样以后就不能删除所有内容。我将发布我的课程。检查我的edit@B.Money给我一点时间,让你更能适应环境,就像一个魔咒。谢谢拉格哈。
String mstring = "Beginning of String....<img src="http://webaddress.com" height="1" width="1"/>";
// You'll need to escape the double quotes if you're explicitly setting the string
public boolean containsTags()
{
boolean lt, gt;
lt = mstring.contains("<");
gt = mstring.contains(">");
return (lt || gt);
}
public void removeTags()
{
int indexof_lt, indexof_gt;
indexof_lt = mstring.indexOf("<");
indexof_gt = mstring.indexOf(">");
String str_first, str_last;
str_first = mstring.substring(0, indexof_lt);
str_last = mstring.substring(indexof_gt + indexof_gt.length);
mstring = str_first + str_last;
}
public void removeAllTags()
{
while(containsTags)
{
removeTags();
}
}