android18

【获取网页源码】

package cn.itcast.htmlviewer;

import cn.itcast.service.PageService;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
    private EditText pathText;
    private TextView codeView;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        pathText = (EditText) this.findViewById(R.id.pagepath);
        codeView = (TextView) this.findViewById(R.id.codeView);
        Button button = (Button) this.findViewById(R.id.button);
        button.setOnClickListener(new ButtonClickListener());
    }
    
    private final class ButtonClickListener implements View.OnClickListener{

        public void onClick(View v) {
            String path = pathText.getText().toString();
            try{
                String html = PageService.getHtml(path);
                codeView.setText(html);
            }catch (Exception e) {
                e.printStackTrace();
                Toast.makeText(getApplicationContext(), R.string.error, 1).show();
            }
        }
        
    }
}

package cn.itcast.service;

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

import cn.itcast.utils.StreamTool;

public class PageService {
    /**
     * 获取网页HTML源代码
     * @param path 网页路径
     * @return
     */
    public static String getHtml(String path) throws Exception{
        URL url = new URL(path);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setConnectTimeout(5000);
        conn.setRequestMethod("GET");
        if(conn.getResponseCode() == 200){
            InputStream inStream = conn.getInputStream();
            byte[] data = StreamTool.read(inStream);
            String html = new String(data, "UTF-8");
            return html;
        }
        return null;
    }

}

package cn.itcast.utils;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;

public class StreamTool {
    /**
     * 读取流中的数据
     * @param inStream
     * @return
     * @throws Exception
     */
    public static byte[] read(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();
    }

}