import java.io.InputStream;

 import java.net.HttpURLConnection;

 import java.net.URL;

 import com.wangjialin.internet.utils.StreamTool;

 public class HtmlService {

     /**

      * 获取网页源码

      * @param path 网页路径

      * @return

      */

     public static String getHtml(String path) throws Exception {

         HttpURLConnection conn = (HttpURLConnection)new URL(path).openConnection();

         conn.setConnectTimeout(5000);

         conn.setRequestMethod("GET");

         if(conn.getResponseCode() == 200){

             InputStream inStream = conn.getInputStream();

             byte[] data = StreamTool.read(inStream);

             return new String(data);

         }

         return null;

     }

 }

 import java.io.ByteArrayOutputStream;

 import java.io.InputStream;

 public class StreamTool {

     /**

      * 从流中读取数据

      * @param inStream

      * @return

      */

     public static byte[] read(InputStream inStream) throws Exception{

         ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

         byte[] buffer = new byte[1024];

         int len = 0;

         while((len = inStream.read(buffer)) != -1){

             outputStream.write(buffer, 0, len);

         }

         inStream.close();

         return outputStream.toByteArray();

     }

 }

     public void showhtml(View v) {

         path = pathText.getText().toString();

         try {

             new Thread(new Runnable(){

                 @Override

                 public void run() {

                     // TODO Auto-generated method stub

                     try {

                         html = HtmlService.getHtml(path);

                     } catch (Exception e) {

                         // TODO Auto-generated catch block

                         e.printStackTrace();

                     }

                 }

             }).start();

             textView.setText(html);

         } catch (Exception e) {

             e.printStackTrace();

             Toast.makeText(getApplicationContext(), R.string.error, Toast.LENGTH_LONG).show();

         }

     }