HtmlTagHandler.java

package com.mohammedlakkadshaw.ken;

import java.util.Vector;

import org.xml.sax.XMLReader;

import android.text.Editable;
import android.text.Html;
import android.text.Spannable;
import android.text.style.BulletSpan;
import android.text.style.LeadingMarginSpan;
import android.text.style.TypefaceSpan;
import android.util.Log;

public class HtmlTagHandler implements Html.TagHandler {
  private int mListItemCount = 0;
    private Vector<String> mListParents = new Vector<String>();

    @Override
    public void handleTag(final boolean opening, final String tag, Editable output, final XMLReader xmlReader) {

        if (tag.equals("ul") || tag.equals("ol") || tag.equals("dd")) {
            if (opening) {
                mListParents.add(tag);
            } else mListParents.remove(tag);

            mListItemCount = 0;
        } else if (tag.equals("li") && !opening) {
            handleListTag(output);
        }
      else if(tag.equalsIgnoreCase("code")) {
    	  if(opening) {
    		  output.setSpan(new TypefaceSpan("monospace"), output.length(), output.length(), Spannable.SPAN_MARK_MARK);
    	  } else {
    		  Log.d("COde Tag","Code tag encountered");
    		 Object obj = getLast(output, TypefaceSpan.class);
    		 int where = output.getSpanStart(obj);
    		 
    		 output.setSpan(new TypefaceSpan("monospace"), where, output.length(), 0);
    	  }
      }
    	
    }

    private Object getLast(Editable text, Class kind) {
    	Object[] objs = text.getSpans(0, text.length(), kind);
    	if(objs.length == 0) {
    		return null;
    	} else {
    		for (int i=objs.length; i > 0; i--) {
    			if(text.getSpanFlags(objs[i-1]) == Spannable.SPAN_MARK_MARK) {
    				return objs[i-1];
    			}
    		}
    		return null;
    	}
    }
    
    private void handleListTag(Editable output) {
        if (mListParents.lastElement().equals("ul")) {
            output.append("\n");
            String[] split = output.toString().split("\n");

            int lastIndex = split.length - 1;
            int start = output.length() - split[lastIndex].length() - 1;
            output.setSpan(new BulletSpan(15 * mListParents.size()), start, output.length(), 0);
        } else if (mListParents.lastElement().equals("ol")) {
            mListItemCount++;

            output.append("\n");
            String[] split = output.toString().split("\n");

            int lastIndex = split.length - 1;
            int start = output.length() - split[lastIndex].length() - 1;
            output.insert(start, mListItemCount + ". ");
            output.setSpan(new LeadingMarginSpan.Standard(15 * mListParents.size()), start, output.length(), 0);
        }
    }
}

Are you okay with publishing this under the Apache License v2?

Trying to use this on anything gives me a java.lang.RuntimeException: PARAGRAPH span must start at paragraph boundary

I got the exception java.lang.RuntimeException: PARAGRAPH span must start at paragraph boundary as well.

I got the exception java.lang.RuntimeException: PARAGRAPH span must start at paragraph boundary.

I think its coming from this line
output.setSpan(new BulletSpan(15 * mListParents.size()), start, output.length(), 0);
and
output.setSpan(new LeadingMarginSpan.Standard(15 * mListParents.size()), start, output.length(), 0);

If you comment it and run it, it is working

can we make the bullet a bit larger ?

Hello, Is there any way I can handle <font> tag in HtmlTagHandler as it is already being handled by Html.fromHtml() ? I want to handle 'size' in <font> tag but I do not want to use <h1> or <big> tags.

Me too @tasneembohra, I need to manipulate font tags h1, h2, a, br.

I'm trying to manipulate a custom tag. I have <J> tag and I want to change the color of the text within the tag