android 图文结合，使用SpannableString和ImageSpan类

参考：http://my.oschina.net/sfshine/blog/147701

/**
  * 根据文本替换成图片   
  * @param text
  * @return
  */
 public CharSequence strToSmiley(CharSequence text) {   
   SpannableStringBuilder builder = new SpannableStringBuilder(text);   
   Pattern mPattern = Pattern.compile("( \\[[0-9]{1,3}\\])");
   Matcher matcher = mPattern.matcher(text);   
   String s="";
   int resId=0;
   while (matcher.find()) {   
    for (int j = 0; j <FaceTool.facelist.size(); j++) {
    s=FaceTool.facelist.get(j).get(matcher.group())+"";
    if(!s.equalsIgnoreCase("null"))
     resId=Integer.parseInt(s);
    
    }
       Drawable drawable = this.getResources().getDrawable(resId);   
       drawable.setBounds(0, 0, 25, 25);//这里设置图片的大小   
       ImageSpan imageSpan = new ImageSpan(drawable, ImageSpan.ALIGN_BOTTOM);   
       builder.setSpan(imageSpan, matcher.start(),   
               matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);   
  }   
  return builder;   
 }  

Drawable drawable = getResources().getDrawable(id); 

       drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight()); 
       //需要处理的文本，[smile]是需要被替代的文本 
       SpannableString spannable = new SpannableString(getText().toString()+"[smile]"); 
       //要让图片替代指定的文字就要用ImageSpan 
       ImageSpan span = new ImageSpan(drawable, ImageSpan.ALIGN_BASELINE); 
       //开始替换，注意第2和第3个参数表示从哪里开始替换到哪里替换结束（start和end） 
      //最后一个参数类似数学中的集合,[5,12)表示从5到12，包括5但不包括12 
       spannable.setSpan(span, getText().length(),getText().length()+"[smile]".length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);   

       setText(spannable);