SpannableStringBuilder用Regex替换内容 [英] SpannableStringBuilder replace content with Regex
本文介绍了SpannableStringBuilder用Regex替换内容的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有以下代码,其中我将使用 SpannableString
标记花括号之间的内容并删除花括号,但它会给出错误的结果。
I have the following code in which I am going to mark the contents between the curly braces with SpannableString
and remove the curly braces but it gives wrong result.
String text = "the {quic}k brown {fox} jumps {over} the lazy dog. {A Quick} {brow}nfoxjumpsoverthelazydog";
tv.setText(makeSpannable(text, "\\{.*?\\}"));
public SpannableStringBuilder makeSpannable(String text, String regex) {
SpannableStringBuilder spannable = new SpannableStringBuilder(text);
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(spannable.toString());
while (matcher.find()) {
String word = matcher.group();
String abbr = word.toString().substring(1, word.length() - 1);
spannable.setSpan(new ForegroundColorSpan(Color.RED), matcher.start(), matcher.end(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
spannable.replace(matcher.start(), matcher.start() + abbr.length() , abbr);
}
return spannable;
}
输入:
the {quic}k brown {fox} jumps {over} the lazy dog. {A Quick} {brow}nfoxjumpsoverthelazydog
输出:
推荐答案
String text = "the {quic}k brown {fox} jumps {over} the lazy dog. {A Quick} {brow}nfoxjumpsoverthelazydog";
tv.setText(makeSpannable(text, "\\{.*?\\}"));
public SpannableStringBuilder makeSpannable(String text, String regex) {
StringBuffer sb = new StringBuffer();
SpannableStringBuilder spannable = new SpannableStringBuilder();
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(text);
while (matcher.find()) {
sb.setLength(0); // clear
String group = matcher.group();
// caution, this code assumes your regex has single char delimiters
String spanText = group.substring(1, group.length() - 1);
matcher.appendReplacement(sb, spanText);
spannable.append(sb.toString());
int start = spannable.length() - spanText.length();
spannable.setSpan(new ForegroundColorSpan(Color.RED), start, spannable.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
sb.setLength(0);
matcher.appendTail(sb);
spannable.append(sb.toString());
return spannable;
}
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