Android编程实现QQ表情的发送和接收完整实例(附源码)

本文实例讲述了android编程实现qq表情的发送和接收。分享给大家供大家参考，具体如下：

在自己做一个聊天应用练习的时候，需要用到表情，于是就想着模仿一下qq表情，图片资源完全copy的qq.apk，解压就可以得到，这里不细说。

下面将该应用中的表情模块功能抽离出来，以便自己以后复习回顾。。

先看一下效果图：

首先进入界面：（完全仿照qq）

点击一下上面的表情图标：

选择一些表情，输入一些文字混合：

点击发送：

可以看到文字和表情图片都一起显示出来了。

下面列出一些关键代码：

表情工具类expressionutil:

public class expressionutil { 
 /** 
  * 对spanablestring进行正则判断，如果符合要求，则以表情图片代替 
  * @param context 
  * @param spannablestring 
  * @param patten 
  * @param start 
  * @throws securityexception 
  * @throws nosuchfieldexception 
  * @throws numberformatexception 
  * @throws illegalargumentexception 
  * @throws illegalaccessexception 
  */ 
 public static void dealexpression(context context,spannablestring spannablestring, pattern patten, int start) throws securityexception, nosuchfieldexception, numberformatexception, illegalargumentexception, illegalaccessexception { 
  matcher matcher = patten.matcher(spannablestring); 
  while (matcher.find()) { 
   string key = matcher.group(); 
   if (matcher.start() < start) { 
    continue; 
   } 
   field field = r.drawable.class.getdeclaredfield(key); 
   int resid = integer.parseint(field.get(null).tostring()); //通过上面匹配得到的字符串来生成图片资源id 
   if (resid != 0) { 
    bitmap bitmap = bitmapfactory.decoderesource(context.getresources(), resid);
    imagespan imagespan = new imagespan(bitmap); //通过图片资源id来得到bitmap，用一个imagespan来包装 
    int end = matcher.start() + key.length(); //计算该图片名字的长度，也就是要替换的字符串的长度 
    spannablestring.setspan(imagespan, matcher.start(), end, spannable.span_inclusive_exclusive); //将该图片替换字符串中规定的位置中 
    if (end < spannablestring.length()) { //如果整个字符串还未验证完，则继续。。 
     dealexpression(context,spannablestring, patten, end); 
    } 
    break; 
   } 
  } 
 } 
 /** 
  * 得到一个spanablestring对象，通过传入的字符串,并进行正则判断 
  * @param context 
  * @param str 
  * @return 
  */ 
 public static spannablestring getexpressionstring(context context,string str,string zhengze){ 
  spannablestring spannablestring = new spannablestring(str); 
  pattern sinapatten = pattern.compile(zhengze, pattern.case_insensitive);  //通过传入的正则表达式来生成一个pattern 
  try { 
   dealexpression(context,spannablestring, sinapatten, 0); 
  } catch (exception e) { 
   log.e("dealexpression", e.getmessage()); 
  } 
  return spannablestring; 
 } 
}

在显示聊天页面的list的适配器中，我们需要做如下的显示，即调用上面工具类的方法：

simplechatadapter中的内部类viewholder：

private class viewholder{ 
  relativelayout chat_layout; 
  imageview image; 
  textview text; 
  public viewholder(view convertview){ 
   chat_layout=(relativelayout) convertview.findviewbyid(r.id.team_singlechat_id_listiteam); 
   image=(imageview) convertview.findviewbyid(r.id.team_singlechat_id_listiteam_headicon); 
   text=(textview) convertview.findviewbyid(r.id.team_singlechat_id_listiteam_message); 
  } 
  public void setdata(messageinfo msg){ 
   relativelayout.layoutparams rl_chat_left=((relativelayout.layoutparams)chat_layout.getlayoutparams()); 
   relativelayout.layoutparams rl_tv_msg_left=((relativelayout.layoutparams)text.getlayoutparams()); 
   relativelayout.layoutparams rl_iv_headicon_left=((relativelayout.layoutparams)image.getlayoutparams()); 
   if(!dicqconstant.defaultmac.equalsignorecase(msg.getusermac())){ //根据本地的mac地址来判断该条信息是属于本人所说还是对方所说 
   //如果是自己说的，则显示在右边；如果是对方所说，则显示在左边 
    rl_chat_left.addrule(relativelayout.align_parent_left,-1); 
    rl_chat_left.addrule(relativelayout.align_parent_right,0); 
    rl_iv_headicon_left.addrule(relativelayout.align_parent_left,-1); 
    rl_iv_headicon_left.addrule(relativelayout.align_parent_right,0); 
    rl_tv_msg_left.addrule(relativelayout.right_of,r.id.team_singlechat_id_listiteam_headicon); 
    rl_tv_msg_left.addrule(relativelayout.left_of,0); 
    text.setbackgroundresource(r.drawable.balloon_l_selector); 
   }else{ 
    rl_chat_left.addrule(relativelayout.align_parent_left,0); 
    rl_chat_left.addrule(relativelayout.align_parent_right,-1); 
    rl_iv_headicon_left.addrule(relativelayout.align_parent_left,0); 
    rl_iv_headicon_left.addrule(relativelayout.align_parent_right,-1); 
    rl_tv_msg_left.addrule(relativelayout.right_of,0); 
    rl_tv_msg_left.addrule(relativelayout.left_of,r.id.team_singlechat_id_listiteam_headicon); 
    text.setbackgroundresource(r.drawable.balloon_r_selector); 
   } 
   image.setimageresource(prortaitutils.conversionidtores(msg.getprotrait()));  //设置头像 
   string str = msg.getmsg(); //消息具体内容 
   string zhengze = "f0[0-9]{2}|f10[0-7]"; //正则表达式，用来判断消息内是否有表情 
   try { 
    spannablestring spannablestring = expressionutil.getexpressionstring(context, str, zhengze); 
    text.settext(spannablestring); 
   } catch (numberformatexception e) { 
    e.printstacktrace(); 
   } catch (securityexception e) { 
    e.printstacktrace(); 
   } catch (illegalargumentexception e) { 
    e.printstacktrace(); 
   } 
  } 
}

关于表情弹出框的实现如下：

mainactivity：

/** 
* 创建一个表情选择对话框 
*/ 
private void createexpressiondialog() { 
  builder = new dialog(mainactivity.this); 
  gridview gridview = creategridview(); 
  builder.setcontentview(gridview); 
  builder.settitle("默认表情"); 
  builder.show(); 
  gridview.setonitemclicklistener(new onitemclicklistener() { 
   @override 
   public void onitemclick(adapterview<?> arg0, view arg1, int arg2, 
     long arg3) { 
    bitmap bitmap = null; 
    bitmap = bitmapfactory.decoderesource(getresources(), imageids[arg2 % imageids.length]); 
    imagespan imagespan = new imagespan(mainactivity.this, bitmap); 
    string str = null; 
    if(arg2<10){ 
     str = "f00"+arg2; 
    }else if(arg2<100){ 
     str = "f0"+arg2; 
    }else{ 
     str = "f"+arg2; 
    } 
    spannablestring spannablestring = new spannablestring(str); 
    spannablestring.setspan(imagespan, 0, 4, spannable.span_exclusive_exclusive); 
    edit.append(spannablestring); 
    builder.dismiss(); 
   } 
  }); 
} 
/** 
* 生成一个表情对话框中的gridview 
* @return 
*/ 
private gridview creategridview() { 
  final gridview view = new gridview(this); 
  list<map<string,object>> listitems = new arraylist<map<string,object>>(); 
  //生成107个表情的id，封装 
  for(int i = 0; i < 107; i++){ 
   try { 
    if(i<10){ 
     field field = r.drawable.class.getdeclaredfield("f00" + i); 
     int resourceid = integer.parseint(field.get(null).tostring()); 
     imageids[i] = resourceid; 
    }else if(i<100){ 
     field field = r.drawable.class.getdeclaredfield("f0" + i); 
     int resourceid = integer.parseint(field.get(null).tostring()); 
     imageids[i] = resourceid; 
    }else{ 
     field field = r.drawable.class.getdeclaredfield("f" + i); 
     int resourceid = integer.parseint(field.get(null).tostring()); 
     imageids[i] = resourceid; 
    } 
   } catch (numberformatexception e) { 
    e.printstacktrace(); 
   } catch (securityexception e) { 
    e.printstacktrace(); 
   } catch (illegalargumentexception e) { 
    e.printstacktrace(); 
   } catch (nosuchfieldexception e) { 
    e.printstacktrace(); 
   } catch (illegalaccessexception e) { 
    e.printstacktrace(); 
   } 
   map<string,object> listitem = new hashmap<string,object>(); 
   listitem.put("image", imageids[i]); 
   listitems.add(listitem); 
  } 
  simpleadapter simpleadapter = new simpleadapter(this, listitems, r.layout.team_layout_single_expression_cell, new string[]{"image"}, new int[]{r.id.image}); 
  view.setadapter(simpleadapter); 
  view.setnumcolumns(6); 
  view.setbackgroundcolor(color.rgb(214, 211, 214)); 
  view.sethorizontalspacing(1); 
  view.setverticalspacing(1); 
  view.setlayoutparams(new layoutparams(layoutparams.fill_parent,layoutparams.wrap_content)); 
  view.setgravity(gravity.center); 
  return view; 
} 

完整实例代码代码点击此处本站下载。

希望本文所述对大家android程序设计有所帮助。