Android編程實現QQ表情的發送和接收完整實例(附源碼)

本文實例講述了Android編程實現QQ表情的發送和接收。分享給大家供大家參考，具體如下：

在自己做一個聊天應用練習的時候，需要用到表情，於是就想著模仿一下QQ表情，圖片資源完全copy的QQ.apk，解壓就可以得到，這裡不細說。

下面將該應用中的表情模塊功能抽離出來，以便自己以後復習回顧。。

先看一下效果圖：

首先進入界面：（完全仿照QQ）

點擊一下上面的表情圖標：

選擇一些表情，輸入一些文字混合：

點擊發送：

可以看到文字和表情圖片都一起顯示出來了。

下面列出一些關鍵代碼：

表情工具類ExpressionUtil:

public class ExpressionUtil { 
 /** 
  * 對spanableString進行正則判斷，如果符合要求，則以表情圖片代替 
  * @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()); //通過上面匹配得到的字符串來生成圖片資源id 
   if (resId != 0) { 
    Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), resId);
    ImageSpan imageSpan = new ImageSpan(bitmap); //通過圖片資源id來得到bitmap，用一個ImageSpan來包裝 
    int end = matcher.start() + key.length(); //計算該圖片名字的長度，也就是要替換的字符串的長度 
    spannableString.setSpan(imageSpan, matcher.start(), end, Spannable.SPAN_INCLUSIVE_EXCLUSIVE); //將該圖片替換字符串中規定的位置中 
    if (end < spannableString.length()) { //如果整個字符串還未驗證完，則繼續。。 
     dealExpression(context,spannableString, patten, end); 
    } 
    break; 
   } 
  } 
 } 
 /** 
  * 得到一個SpanableString對象，通過傳入的字符串,並進行正則判斷 
  * @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);  //通過傳入的正則表達式來生成一個pattern 
  try { 
   dealExpression(context,spannableString, sinaPatten, 0); 
  } catch (Exception e) { 
   Log.e("dealExpression", e.getMessage()); 
  } 
  return spannableString; 
 } 
}

在顯示聊天頁面的list的適配器中，我們需要做如下的顯示，即調用上面工具類的方法：

SimpleChatAdapter中的內部類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())){ //根據本地的mac地址來判斷該條信息是屬於本人所說還是對方所說 
   //如果是自己說的，則顯示在右邊；如果是對方所說，則顯示在左邊 
    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()));  //設置頭像 
   String str = msg.getMsg(); //消息具體內容 
   String zhengze = "f0[0-9]{2}|f10[0-7]"; //正則表達式，用來判斷消息內是否有表情 
   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(); 
   } 
  } 
}

關於表情彈出框的實現如下：

MainActivity：

/** 
* 創建一個表情選擇對話框 
*/ 
private void createExpressionDialog() { 
  builder = new Dialog(MainActivity.this); 
  GridView gridView = createGridView(); 
  builder.setContentView(gridView); 
  builder.setTitle("默認表情"); 
  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(); 
   } 
  }); 
} 
/** 
* 生成一個表情對話框中的gridview 
* @return 
*/ 
private GridView createGridView() { 
  final GridView view = new GridView(this); 
  List<Map<String,Object>> listItems = new ArrayList<Map<String,Object>>(); 
  //生成107個表情的id，封裝 
  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; 
} 

完整實例代碼代碼點擊此處本站下載。

希望本文所述對大家Android程序設計有所幫助。