編輯:Android開發實例
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。
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