android 新浪微博客户端的表情功能的实现

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这是一篇好文章,我转来收藏,技术的最高境界是分享。

最近在搞android 新浪微博客户端,有一些心得分享
弄android客户端表情功能可以用以下思路
1.首页把新浪的表情下载到本地一文件夹种,表情图片的命名要用新浪微博表情原来的命名
比如 新浪的害羞表情是shame.gif 那么你在本地也得命名为shame.gif,命名相同主要是为了能够匹配表情对应的code.
2.把本地的表情都放进android的资源文件里----drawable下面
3.访问新浪的表情接口(新浪返回的数据类型有json和xml两种,本人用xml),把返回的信息,利用xml解析器解析出来的信息储存在一个Emotion.java的bean里,这样就可以根据Emotion.java的code找到一一对应的资源表情图片了
4.实现一个可以让用户选择的表情界面,本人用GridView实现
5.实现点击GridView的每一个item,处理根据item的index查找对应的表情code,然后再把code利用正则把code转换为相对应的表情图片,最后表情插入EditText进行发送。

下面是具体的实现过程

1.把新浪表情图片下载到本地的实现如下:(这个可以建一个java工程进行下载)

[java] view plaincopyprint?
  1. public void getFriendList()throws Exception { 
  2.         BlogReleaseServiceImpl service = new BlogReleaseServiceImpl(); 
  3.         List<Emotions> list = service.getEmotion(); 
  4.         for (Emotions emotions : list) { 
  5.             String path = emotions.getUrl(); 
  6.             String filename = path.substring(path.lastIndexOf("/") +1,path.length()); 
  7.             URL url =  new URL(path); 
  8.             HttpURLConnection conn = (HttpURLConnection)url.openConnection(); 
  9.             conn.setRequestMethod("GET"); 
  10.             conn.setReadTimeout(5 * 1000); 
  11.             if(conn.getResponseCode() ==200){ 
  12.                 InputStream is = conn.getInputStream(); 
  13.                 byte[] data = readStream(is); 
  14.                 File file = new File("f: \\sina_images\\" + filename); 
  15.                 FileOutputStream fs = new FileOutputStream(file); 
  16.                 fs.write(data); 
  17.                 fs.close(); 
  18.             }else
  19.                 System.out.println("请求失败"); 
  20.             } 
  21.         } 
  22.     } 
  23.      
  24.     public byte[] readStream(InputStream is)throws Exception { 
  25.         ByteArrayOutputStream os = new ByteArrayOutputStream(); 
  26.         byte[] buffer = newbyte[2048]; 
  27.         int len = 0
  28.         while((len = is.read(buffer)) != -1){ 
  29.             os.write(buffer,0,len); 
  30.         } 
  31.         is.close(); 
  32.         return os.toByteArray(); 
  33.     } 

2:把本地的表情都放进android的资源文件里----drawable下面(这个就不用多说了,直接选取所有文件复制就行了)

3:

3.1访问新浪的表情接口,把返回的信息如下:

[html] view plaincopyprint?
  1.      <emotion> 
  2. <phrase>[嘻嘻]</phrase> 
  3. <type>face</type> 
  4. <url>http://img.t.sinajs.cn/t35/style/images/common/face/ext/normal/c2/tooth.gif 
  5. </url> 
  6. <is_hot>false</is_hot> 
  7. <is_common>true</is_common> 
  8. <order_number>0</order_number> 
  9. <category></category> 
  10. lt;/emotion> 


3.2 储存在一个Emotion.java里。Emotion.java代码如下:

[java] view plaincopyprint?
  1. package com.uim.microblog.model; 
  2.  
  3. import java.io.Serializable; 
  4.  
  5. public class Emotionsimplements Serializable { 
  6.  
  7.     /**
  8.      *
  9.      */ 
  10.     private staticfinallong serialVersionUID = 1L; 
  11.      
  12.     private String phrase;//表情使用的替代文字 
  13.     private String type; 
  14.     private String url;//表情图片存放的位置 
  15.     private String isHot;//是否为热门表情 
  16.     private String isCommon;//是否属于通用 
  17.     private String orderNumber;//该表情在系统中的排序号码 
  18.     private String category;//表情分类 
  19.     private String imageName;//表情名称 
  20.      
  21.     public String getImageName() { 
  22.         return imageName; 
  23.     } 
  24.     public void setImageName(String imageName) { 
  25.         this.imageName = imageName; 
  26.     } 
  27.     public String getPhrase() { 
  28.         return phrase; 
  29.     } 
  30.     public void setPhrase(String phrase) { 
  31.         this.phrase = phrase; 
  32.     } 
  33.     public String getType() { 
  34.         return type; 
  35.     } 
  36.     public void setType(String type) { 
  37.         this.type = type; 
  38.     } 
  39.     public String getUrl() { 
  40.         return url; 
  41.     } 
  42.     public void setUrl(String url) { 
  43.         this.url = url; 
  44.     } 
  45.     public String getIsHot() { 
  46.         return isHot; 
  47.     } 
  48.     public void setIsHot(String isHot) { 
  49.         this.isHot = isHot; 
  50.     } 
  51.     public String getIsCommon() { 
  52.         return isCommon; 
  53.     } 
  54.     public void setIsCommon(String isCommon) { 
  55.         this.isCommon = isCommon; 
  56.     } 
  57.     public String getOrderNumber() { 
  58.         return orderNumber; 
  59.     } 
  60.     public void setOrderNumber(String orderNumber) { 
  61.         this.orderNumber = orderNumber; 
  62.     } 
  63.     public String getCategory() { 
  64.         return category; 
  65.     } 
  66.     public void setCategory(String category) { 
  67.         this.category = category; 
  68.     } 
  69.          

3.2 储存在一个Emotion.java里。Emotion.java代码如下:

[java] view plaincopyprint?
  1. package com.uim.microblog.net.handler; 
  2.  
  3. import java.util.ArrayList; 
  4. import java.util.List; 
  5.  
  6. import org.xml.sax.Attributes; 
  7. import org.xml.sax.SAXException; 
  8. import org.xml.sax.helpers.DefaultHandler; 
  9.  
  10. import com.uim.microblog.model.Emotions; 
  11. import com.uim.microblog.model.ResponseResult; 
  12.  
  13. public class BlogEmotionsHandlerextends DefaultHandler { 
  14.      
  15.     private List<Emotions> list; 
  16.      
  17.     private Emotions emotions; 
  18.     private ResponseResult responseresult; 
  19.      
  20.     private String tag = null;//正在解析的元素 
  21.      
  22.      
  23.     public List<Emotions> getEmotionsList(){ 
  24.         return list; 
  25.     } 
  26.  
  27.     @Override 
  28.     public void characters(char[] ch,int start,int length) 
  29.             throws SAXException { 
  30.         if (tag != null) { 
  31.             String textArea = new String(ch,start,length); 
  32.              
  33.             /**开始解析表情数据*/ 
  34.             if ("phrase".equals(tag)) { 
  35.                 emotions.setPhrase(textArea); 
  36.             } else if ("type".equals(tag)) { 
  37.                 emotions.setType(textArea); 
  38.             } else if ("url".equals(tag)) { 
  39.                 try
  40.                     emotions.setUrl(textArea); 
  41.                     String imageName = textArea.substring(textArea.lastIndexOf("/") +1,textArea.length() -4); 
  42.                     emotions.setImageName(imageName); 
  43.                 } catch (Exception e) { 
  44.                     e.printStackTrace(); 
  45.                 } 
  46.             } else if ("is_hot".equals(tag)) { 
  47.                 emotions.setIsHot(textArea); 
  48.             } else if ("is_common".equals(tag)) { 
  49.                 emotions.setIsCommon(textArea); 
  50.             } else if ("order_number".equals(tag)) { 
  51.                 emotions.setOrderNumber(textArea); 
  52.             } else if ("category".equals(tag)) { 
  53.                 emotions.setCategory(textArea); 
  54.             } else if ("retn".equals(tag)) { 
  55.                 responseresult.setRetn(textArea); 
  56.             } else if ("desc".equals(tag)) { 
  57.                 responseresult.setDesc(textArea); 
  58.             } 
  59.         } 
  60.          
  61.     } 
  62.  
  63.     @Override 
  64.     public void endDocument()throws SAXException { 
  65.         super.endDocument(); 
  66.     } 
  67.  
  68.     @Override 
  69.     public void endElement(String uri, String localName, String qName) 
  70.             throws SAXException { 
  71.         tag = null
  72.         if ("mb".equals(localName)) { 
  73.              
  74.         } else if ("emotions".equals(localName)) { 
  75.             responseresult =null
  76.         } else if ("emotion".equals(localName)) { 
  77.             list.add(emotions); 
  78.              
  79.             emotions = null
  80.         }  
  81.     } 
  82.  
  83.     @Override 
  84.     public void startDocument()throws SAXException { 
  85.         list = new ArrayList<Emotions>(); 
  86.     } 
  87.  
  88.     @Override 
  89.     public void startElement(String uri, String localName, String qName, 
  90.             Attributes attributes) throws SAXException { 
  91.         if ("mb".equals(localName)) { 
  92.             responseresult = new ResponseResult(); 
  93.         } else if ("emotions".equals(localName)) { 
  94.              
  95.         } else if ("emotion".equals(localName)) { 
  96.             emotions = new Emotions(); 
  97.         }  
  98.          
  99.         tag = localName; 
  100.     } 
  101.      
  102.      
  103.  


3.4sax解析

[java] view plaincopyprint?
  1. public List<Emotions> getEmotion(){ 
  2.         BlogGetData getdata = new BlogGetData(); 
  3.         String result = getdata.blogEmotionsServlet(); 
  4.         try
  5.             //生成SAX解析对象 
  6.             parser = SAXParserFactory.newInstance().newSAXParser(); 
  7.             //生成xml读取器 
  8.             reader = parser.getXMLReader(); 
  9.             BlogEmotionsHandler handler = new BlogEmotionsHandler(); 
  10.             //设置Handler 
  11.             reader.setContentHandler(handler); 
  12.             //指定文件,进行解析 
  13.             reader.parse(new InputSource(new StringReader(result))); 
  14.             //获取 List<Emotions> 
  15.             emotionList = handler.getEmotionsList(); 
  16.         } catch (ParserConfigurationException e) { 
  17.             e.printStackTrace(); 
  18.         } catch (SAXException e) { 
  19.             e.printStackTrace(); 
  20.         } catch (IOException e) { 
  21.             e.printStackTrace(); 
  22.         } 
  23.          
  24.         return emotionList; 
  25.     } 


4:

4.1实现表情选择器---GridView

[html] view plaincopyprint?
  1. <GridView 
  2.             android:id="@+id/blog_sendmsg_gvemotion" 
  3.             android:layout_width="fill_parent" 
  4.             android:layout_height="150sp" 
  5.             android:scrollbars="vertical" 
  6.             android:numColumns="auto_fit" 
  7.             android:verticalSpacing="15dp" 
  8.             android:background="@color/blog_list_back" 
  9.             android:stretchMode="columnWidth" 
  10.             android:gravity="center" 
  11.             android:visibility="gone" 
  12.             android:columnWidth="40dp"> 
  13.     </GridView> 


4.2 GridView的item-----gridview_emotion_item.xml

[html] view plaincopyprint?
  1. <?xmlversion="1.0"encoding="utf-8"?> 
  2. <LinearLayout 
  3.   xmlns:android="http://schemas.android.com/apk/res/android" 
  4.   android:layout_width="fill_parent" 
  5.   android:layout_height="fill_parent"> 
  6.   <ImageView 
  7.     android:id="@+id/blog_sendmsg_emotion" 
  8.     android:layout_width="wrap_content" 
  9.     android:layout_height="wrap_content" 
  10.     android:layout_weight="50" 
  11.     android:layout_gravity="center"> 
  12.   </ImageView> 
  13. </LinearLayout> 

4.3代码加载表情图片到GridView进行显示

[java] view plaincopyprint?
  1. public void addexpression(View view){ 
  2.         if (expressionGriView.getVisibility() == View.GONE) { 
  3.             expressionGriView.setVisibility(View.VISIBLE); 
  4.              
  5.             emotionList = BlogHomeActivity.emotions; 
  6.             ArrayList<HashMap<String, Object>> lstImageItem = new ArrayList<HashMap<String, Object>>(); 
  7.               
  8.               for(int i=0;i<70;i++)   
  9.               {  
  10.                 emtions = emotionList.get(i);    
  11.                 if (emtions !=null) { 
  12.                     HashMap<String, Object> map = new HashMap<String, Object>(); 
  13.                  
  14.                     Field f; 
  15.                     try
  16.                         f = (Field)R.drawable.class.getDeclaredField(emtions.getImageName()); 
  17.                         int j = f.getInt(R.drawable.class);  
  18.                         map.put("ItemImage", j);//添加图像资源的ID  
  19.                         lstImageItem.add(map);   
  20.                     } catch (SecurityException e) { 
  21.                         e.printStackTrace(); 
  22.                     } catch (NoSuchFieldException e) { 
  23.                         e.printStackTrace(); 
  24.                     }catch (IllegalArgumentException e) { 
  25.                         e.printStackTrace(); 
  26.                     } catch (IllegalAccessException e) { 
  27.                         e.printStackTrace(); 
  28.                     } 
  29.                      
  30.                 }   
  31.                  
  32.               }   
  33.                
  34.             //生成适配器的ImageItem <====> 动态数组的元素,两者一一对应  
  35.               SimpleAdapter saImageItems = new SimpleAdapter(this,  
  36.                                                         lstImageItem,//数据来源   
  37.                                                         R.layout.blog_emotion_list, 
  38.                                                            
  39.                                                         //动态数组与ImageItem对应的子项           
  40.                                                         new String[] {"ItemImage"},    
  41.                                                            
  42.                                                         //ImageItem的XML文件里面的一个ImageView 
  43.                                                         new int[] {R.id.blog_sendmsg_emotion});   
  44.                
  45.               expressionGriView.setAdapter(saImageItems);   
  46.         } else
  47.             expressionGriView.setVisibility(View.GONE); 
  48.         } 
  49.          
  50.     } 


5:实现点击GridView的每一个item,处理根据item的index查找对应的表情code,然后再把code利用正则把code转换为相对应的表情图片,最后表情插入EditText进行发送

5.1:code转换为图片:

[java] view plaincopyprint?
  1. public SpannableString txtToImg(String content){ 
  2.         SpannableString ss = new SpannableString(content); 
  3.         int starts = 0
  4.         int end = 0
  5.          
  6.         if(content.indexOf("[", starts) != -1 && content.indexOf("]", end) != -1){ 
  7.             starts = content.indexOf("[", starts); 
  8.             end = content.indexOf("]", end); 
  9.             String phrase = content.substring(starts,end + 1); 
  10.             String imageName = ""
  11.             List<Emotions> list = BlogHomeActivity.emotions; 
  12.             for (Emotions emotions : list) { 
  13.                 if (emotions.getPhrase().equals(phrase)) { 
  14.                     imageName = emotions.getImageName(); 
  15.                 } 
  16.             } 
  17.              
  18.             try
  19.                 Field f = (Field)R.drawable.class.getDeclaredField(imageName); 
  20.                 int i= f.getInt(R.drawable.class); 
  21.                 Drawable drawable = BlogSendMsgActivity.this.getResources().getDrawable(i);   
  22.                 if (drawable != null) { 
  23.                     drawable.setBounds(0,0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());  
  24.                     ImageSpan span = new ImageSpan(drawable, ImageSpan.ALIGN_BASELINE);   
  25.                     ss.setSpan(span, starts,end + 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);   
  26.                 } 
  27.             } catch (SecurityException e) { 
  28.                 e.printStackTrace(); 
  29.             } catch (NoSuchFieldException e) { 
  30.                 e.printStackTrace(); 
  31.             } catch (IllegalArgumentException e) { 
  32.                 e.printStackTrace(); 
  33.             } catch (IllegalAccessException e) { 
  34.                  
  35.             } 
  36.  
  37.         } 
  38.         return ss; 
  39.     } 


5.2:插入EditText

[java] view plaincopyprint?
  1. emtions = emotionList.get(position);//获取表情bean 
  2.                   int cursor = etcontent.getSelectionStart(); 
  3.                   etcontent.getText().insert(cursor, txtToImg(emtions.getPhrase())); 


写完收工,给个效果图:


转自:http://jspjson.iteye.com/blog/1109222

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