Android 解析網頁 (html parser) 取資料，使用 HtmlCleaner

HtmlCleaner

這篇文章是為了解決這篇回應遇到的問題，想說寫下來方便其他遇到同樣問題的人可以參考。

使用的工具

HtmlCleaner
請將 HtmlCleaner 官網中下載的 *.jar 檔加入專案中的 libs 目錄。

程式碼

用來儲存資料的值物件，Price.java

public class Price {
 /**
  * 按盤價
  */
 private String priceNow;
 /**
  * 最高
  */
 private String highest;
 /**
  * 最低
  */
 private String lowest;
 
 public String getPriceNow() {
  return priceNow;
 }
 public void setPriceNow(String priceNow) {
  this.priceNow = priceNow;
 }
 public String getHighest() {
  return highest;
 }
 public void setHighest(String highest) {
  this.highest = highest;
 }
 public String getLowest() {
  return lowest;
 }
 public void setLowest(String lowest) {
  this.lowest = lowest;
 }
}

工具類別，Utility.java

public class Utility {
 
 public static final String DATA_URL = "http://www.etnet.com.hk/mobile/tc/quote.php?code=";
 
 /**
  * Get method
  * @param _url
  * @return
  */
 public static String getHtmlByGet(String _url){ 
  
  String result = "";
  
  DefaultHttpClient client = new DefaultHttpClient();
  try {
   
         HttpGet get = new HttpGet(_url);
         
            HttpResponse response = client.execute(get); 
            
            HttpEntity resEntity = response.getEntity();
            
            if (resEntity != null) {
             result = toUTF8(resEntity.getContent());
            }
            
            
            
  } catch (Exception e) {
         e.printStackTrace();
     } finally {
      client.getConnectionManager().shutdown();
     }
 
      
  return result;
 }
 
 
 
 /**
  * 取得即時報價
  * @param code
  */
 public static Price getPrice(String code){
  Price price = new Price();
  
  String html = getHtmlByGet(DATA_URL + code);
  
  TagNode tagNode;

  try {
   
   tagNode = new HtmlCleaner().clean(html);
   
   //按盤價
   TagNode[] nodePriceNow = tagNode.getElementsByAttValue("class", "quoteNominalRight bigdown2", true, false);
   String priceNow = nodePriceNow[0].getText().toString();
   price.setPriceNow(priceNow);
   
   TagNode[] nodeQuoteOther = tagNode.getElementsByAttValue("class", "quoteOther", true, false);
   String highest = nodeQuoteOther[1].getText().toString();
   String lowest = nodeQuoteOther[3].getText().toString();
   price.setHighest(highest);
   price.setLowest(lowest);

  } catch (Exception e) {
   e.printStackTrace();
  }
  
  return price;
 }
 
 private static String toUTF8(InputStream is){
  //InputStream is = resEntity.getContent();
        InputStreamReader isr = null;
        StringBuffer buffer = new StringBuffer();
  try {
   isr = new InputStreamReader(is, "utf-8");
   
   Reader in = new BufferedReader(isr);
         
   int ch;
   while((ch = in.read()) != -1){
    buffer.append((char)ch);
   }
   
   isr.close();
   is.close();
  } catch (UnsupportedEncodingException e) {
   e.printStackTrace();
  } catch (IOException e){
   e.printStackTrace();
  }
        
  
  return buffer.toString();
 }
}

執行 MainActivity.java

public class MainActivity extends Activity {

 private TextView txtResult;
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        initView();
        getData();
    }

 private void initView() {
  txtResult = (TextView) findViewById(R.id.txtResult);
 }

 private void getData() {
  Price price = Utility.getPrice("1");
  String result = "按盤價" + price.getPriceNow() + "\n最高" + price.getHighest() + "\n最低" + price.getLowest();
  txtResult.setText(result);
 }
}

執行結果

因為隨手寫的，所以可能會有誤，直接下載程式碼回去研究吧。
程式碼下載：HtmlParserDemo.zip

本文網址：https://blog.tonycube.com/2012/10/androidhtml-parserhtmlcleaner.html
由 Tony Blog 撰寫，請勿全文複製，轉載時請註明出處及連結，謝謝 😀