Java tutorial
//package com.java2s; import java.util.HashMap; import java.util.Map; import java.util.Map.Entry; import java.util.regex.Matcher; import java.util.regex.Pattern; import android.content.Context; import android.text.Spannable; import android.text.style.ImageSpan; public class Main { private static final Map<Pattern, Integer> emoticons = new HashMap<Pattern, Integer>(); public static boolean addEmoticons(Context context, Spannable spannable) { boolean hasChanges = false; for (Entry<Pattern, Integer> entry : emoticons.entrySet()) { Matcher matcher = entry.getKey().matcher(spannable); while (matcher.find()) { boolean set = true; for (ImageSpan span : spannable.getSpans(matcher.start(), matcher.end(), ImageSpan.class)) if (spannable.getSpanStart(span) >= matcher.start() && spannable.getSpanEnd(span) <= matcher.end()) spannable.removeSpan(span); else { set = false; break; } if (set) { hasChanges = true; spannable.setSpan(new ImageSpan(context, entry.getValue()), matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); } } } return hasChanges; } }