Android从网页的源码中特定标签中取值

最近想要做一个关于彩票的项目，好用的彩票接口都要收费，免费的次数也有限，于是从网上找到相关开奖网页，想从网页的代码中获得想要的数据，直接上代码。

import android.app.Activity;
import android.os.Bundle;
import android.os.StrictMode;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;



public class MainActivity extends Activity {
    private String path = "http://baidu.lecai.com/lottery/draw/list/528/?agentId=5572";
    ListView listview;

    List<String> time=new ArrayList<>();
    List<String> number=new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //加上这两句代码 好像可以在主线程中进行网络访问
/**************************************************/ 
        StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
                .detectDiskReads().detectDiskWrites().detectNetwork()
                .penaltyLog().build());
        StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
                .detectLeakedSqlLiteObjects().detectLeakedClosableObjects()
                .penaltyLog().penaltyDeath().build());
/**************************************************/ 

        listview = (ListView) this.findViewById(R.id.ls);
                try {

        String htmlContent  =  HtmlService.getHtml(path);

                    //彩票开奖时间
    Pattern p = Pattern.compile("<td class=\"td1\">(.*?)</td>");
                    Matcher m = p.matcher(htmlContent);
                    while(m.find()){
                        time.add(m.group(1));
                    }
                    time.remove(time.get(0));
  ArrayAdapter<String> timeAdapter=new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_1,time);
                    listview.setAdapter(timeAdapter);

                } catch (Exception e) {
                 System.out.println("程序发生了异常");
                }

        //彩票开奖号码
//        Pattern p = Pattern.compile("<span class=\"ball_1\">(.*?)</span>");
//        Matcher m = p.matcher(htmlContent);
//        while(m.find()){
//            number.add(m.group(1));
//        }
//        ArrayAdapter<String> timeAdapter=new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_1,number);
//        listview.setAdapter(timeAdapter);
////                    textView.setText(m.group(1));
//
//    } catch (Exception e) {
//        //  textView.setText("程序出现异常："+e.toString());
//    }

    }

}



import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;


public class HtmlService {
    public static String getHtml(String path) throws Exception {
        // 通过网络地址创建URL对象
        URL url = new URL(path);
        // 根据URL
        // 打开连接，URL.openConnection函数会根据URL的类型，返回不同的URLConnection子类的对象，这里URL是一个http，因此实际返回的是HttpURLConnection
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        // 设定URL的请求类别，有POST、GET 两类
        conn.setRequestMethod("GET");
        //设置从主机读取数据超时（单位：毫秒）
        conn.setConnectTimeout(5000);
        //设置连接主机超时（单位：毫秒）
        conn.setReadTimeout(5000);
        // 通过打开的连接读取的输入流,获取html数据
        InputStream inStream = conn.getInputStream();
        // 得到html的二进制数据
        byte[] data = readInputStream(inStream);
        // 是用指定的字符集解码指定的字节数组构造一个新的字符串
        String html = new String(data, "utf-8");
        return html;
    }

    /**
     * 读取输入流，得到html的二进制数据
     *
     * @param inStream
     * @return
     * @throws Exception
     */
    public static byte[] readInputStream(InputStream inStream) throws Exception {
        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int len = 0;
        while ((len = inStream.read(buffer)) != -1) {
            outStream.write(buffer, 0, len);
        }
        inStream.close();
        return outStream.toByteArray();
    }

}

还需要导入几个jar包，jsuop.jar,org.apache.http jar包