android18

【获取网页源码】

 1 package cn.itcast.htmlviewer;
 2 
 3 import cn.itcast.service.PageService;
 4 import android.app.Activity;
 5 import android.os.Bundle;
 6 import android.view.View;
 7 import android.widget.Button;
 8 import android.widget.EditText;
 9 import android.widget.TextView;
10 import android.widget.Toast;
11 
12 public class MainActivity extends Activity {
13     private EditText pathText;
14     private TextView codeView;
15     
16     @Override
17     public void onCreate(Bundle savedInstanceState) {
18         super.onCreate(savedInstanceState);
19         setContentView(R.layout.main);
20         
21         pathText = (EditText) this.findViewById(R.id.pagepath);
22         codeView = (TextView) this.findViewById(R.id.codeView);
23         Button button = (Button) this.findViewById(R.id.button);
24         button.setOnClickListener(new ButtonClickListener());
25     }
26     
27     private final class ButtonClickListener implements View.OnClickListener{
28 
29         public void onClick(View v) {
30             String path = pathText.getText().toString();
31             try{
32                 String html = PageService.getHtml(path);
33                 codeView.setText(html);
34             }catch (Exception e) {
35                 e.printStackTrace();
36                 Toast.makeText(getApplicationContext(), R.string.error, 1).show();
37             }
38         }
39         
40     }
41 }

View Code

 1 package cn.itcast.service;
 2 
 3 import java.io.InputStream;
 4 import java.net.HttpURLConnection;
 5 import java.net.URL;
 6 
 7 import cn.itcast.utils.StreamTool;
 8 
 9 public class PageService {
10     /**
11      * 获取网页HTML源代码
12      * @param path 网页路径
13      * @return
14      */
15     public static String getHtml(String path) throws Exception{
16         URL url = new URL(path);
17         HttpURLConnection conn = (HttpURLConnection) url.openConnection();
18         conn.setConnectTimeout(5000);
19         conn.setRequestMethod("GET");
20         if(conn.getResponseCode() == 200){
21             InputStream inStream = conn.getInputStream();
22             byte[] data = StreamTool.read(inStream);
23             String html = new String(data, "UTF-8");
24             return html;
25         }
26         return null;
27     }
28 
29 }

View Code

 1 package cn.itcast.utils;
 2 
 3 import java.io.ByteArrayOutputStream;
 4 import java.io.InputStream;
 5 
 6 public class StreamTool {
 7     /**
 8      * 读取流中的数据
 9      * @param inStream
10      * @return
11      * @throws Exception
12      */
13     public static byte[] read(InputStream inStream) throws Exception{
14         ByteArrayOutputStream outStream = new ByteArrayOutputStream();
15         byte[] buffer = new byte[1024];
16         int len = 0;
17         while( (len = inStream.read(buffer)) != -1){
18             outStream.write(buffer, 0, len);
19         }
20         inStream.close();
21         return outStream.toByteArray();
22     }
23 
24 }

View Code