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。