通过第一个和最后一个字符删除字符串的一部分？

Question

I am getting a HTML string as a result of querying a remote XML feed. I use the result to set text to a TextView . The problem is that a string contains HTML comment tags which are not supported by the TextView element.

Now, I need a way to remove (substring) the resulting string by indicating the part which will be removed. I cannot work via start and end positions, but I have to use starting and ending string pattern ( <!-- as starting and --> as ending).

How can I do this?

Answer 1

perhaps use this:

String str = "your html string";
int start = str.indexOf("<!--");
int end = str.indexOf("-->");
str = str.replace(str.substring(start, (end - start)), "");

Answer 2

I found this in here. I believe that since android is a tag here the answer will be relevant.

android.text.Html.fromHtml(instruction).toString()

Remove HTML tags from a String .

Answer 3

You can use regular express, eg

    String input = "<!-- \nto be removed -->hello <!-- to be removed-->world";
    Pattern pattern = Pattern.compile("<!--.*?-->", Pattern.DOTALL | Pattern.UNICODE_CASE | Pattern.MULTILINE);
    Matcher matcher = pattern.matcher(input);
    StringBuilder builder = new StringBuilder();
    int lastIndex = 0;
    while (matcher.find()) {
        builder.append(input.substring(lastIndex, matcher.start()));
        lastIndex = matcher.end();
    }
    builder.append(input.substring(lastIndex));
    System.out.println(builder);

Answer 4

您也可以使用HTML.fromHTML

Answer 5

You can use the Html.fromHtml() method to use html-formatted text in a TextView , example:

CharSequence text = Html.fromHtml("before <!--comment--><b>after</b>");
myTextView.setText(text);

The TextView will now have the text "before after ".