HTML格式化字符串插入TextViews和EditText

Question

All,

I have a database that will store an HTML tagged text to retain formatting information from an EditText. I create this string using HTML.toHtml(EditText.getText). I notice this method wraps whatever Spanned Text is put in it with <p> and </p> . The issue with that is when I got to use the method HTML.fromHtml(HTMLFormattedString) and then use the setText method of either a TextView or EditText there are two extra lines at the end of my actual text, which makes sense because that is how the paragraph tag works with HTML.

My question is is there anyway to make the textView or EditText shrink to not display the extra blank lines? What is the simplest way to do this? I have experimented with just removing the last <p> and </p> , but that only works if the user did not enter 3 or more new lines with the return key.

Answer 1

I ended up searching for white space at the end of the spanned text that was created and removed it. This took care of extra spaces due to the <p> </p> and was less time consuming than overriding the mentioned class to achieve the same results.

public SpannableStringBuilder trimTrailingWhitespace(
        SpannableStringBuilder spannableString) {

    if (spannableString == null)
        return new SpannableStringBuilder("");

    int i = spannableString.length();

    // loop back to the first non-whitespace character
    while (--i >= 0 && Character.isWhitespace(spannableString.charAt(i))) {
    }

    return new SpannableStringBuilder(spannableString.subSequence(0, i + 1));
}

Answer 2

Well this is just a round about approach. I had the same issue. And you are provided with two options,

1)As you said that paragraph tag works the way what you have suspected. What it does , it appends two "\\n" values to the end of each <\\p> tag. So you can convert the html to string and remove the last two characters which are usually two "\\n"s

or

2) You have get into the Html Class itself. That is, you have to override the HTML class and look for handleP(SpannableStringBuilder text) and change its core logic a little bit.

private static void handleP(SpannableStringBuilder text) {
    int len = text.length();

    if (len >= 1 && text.charAt(len - 1) == '\n') {
        if (len >= 2 && text.charAt(len - 2) == '\n') {
            return;
        }
        text.append("\n");
        return;
    }

    if (len != 0) {
        text.append("\n\n");


    }
} 

As you can see here, it appends two "\\n" in len!=0 which is were you have to do the change.