获取网页源码示例_

package com.example.http01;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;


public class MainActivity extends Activity {
	private Button r_b = null;
	private HttpResponse httpResponse = null;
	private HttpEntity httpEntity = null;
	
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    
    r_b = (Button)findViewById(R.id.requestbutton);
    r_b.setOnClickListener(new OnClickListener() {
			
			@Override
			public void onClick(View v) {
				HttpGet httpget = new HttpGet("https://www.baidu.com");
				HttpClient httpclient = new DefaultHttpClient();
				InputStream inputStream = null;
				try{
					httpResponse = httpclient.execute(httpget);
					httpEntity = httpResponse.getEntity();
					inputStream = httpEntity.getContent();
					BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
					String result = "";
					String line = "";
					while((line = reader.readLine()) != null)
						result = result  line;
					System.out.println(result);	
					
				}
				catch(Exception e){
					e.printStackTrace();
				}
				finally{
					try{
						inputStream.close();
					}
					catch(Exception e){
						e.printStackTrace();
					}
				}
			}
    });
  }
  
}