RichTextUtils.java

package com.ioabsoftware.gameraven.util;

import android.text.Spannable;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.CharacterStyle;

public class RichTextUtils {

    public static <A extends CharacterStyle, B extends CharacterStyle> Spannable replaceAll(
            Spanned original,
            Class<A> sourceType,
            SpanConverter<A, B> converter) {

        SpannableString result = new SpannableString(original);
        A[] spans = result.getSpans(0, result.length(), sourceType);

        for (A span : spans) {
            int start = result.getSpanStart(span);
            int end = result.getSpanEnd(span);
            int flags = result.getSpanFlags(span);

            result.removeSpan(span);
            result.setSpan(converter.convert(span), start, end, flags);
        }

        return (result);
    }

    public interface SpanConverter<A extends CharacterStyle, B extends CharacterStyle> {
        B convert(A span);
    }

}