解析html

<span style="font-family: Arial, Helvetica, sans-serif;">package com.xh.tx.html;</span>

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

import android.app.Activity;
import android.os.Bundle;

import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
	
	TextView tv_html_content = null;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	
		tv_html_content = (TextView) findViewById(R.id.tv_html_content);
		
		loadHtml("http://10.0.2.2:8080/baidu/");
		
	}

	//加载html
	private void loadHtml(String uri) {
		
		try {
			final URL url = new URL(uri);
			
			new Thread(new Runnable(){

				@Override
				public void run() {
					
					HttpURLConnection conn = null;
					
					try {
						conn = (HttpURLConnection) url.openConnection();
					
						conn.setConnectTimeout(30000);
						conn.setReadTimeout(30000);
						conn.setRequestMethod("GET");//以get的方式去请求数据，如果没有这句话，默认就是以get方式请求
						
						conn.connect();//连接
						/**
						 * 网络连接是否一定成功? 》》 否定的
						 * 如何判断网络一定成功 >> 在http请求中有一个状态来标示网络是否成功
						 */
						
						if(conn.getResponseCode()==200){
							final String content =releaseInputStream(conn.getInputStream());
							//非要打印一句话
							
							runOnUiThread(new Runnable(){

								@Override
								public void run() {
									if(null==content){
										Toast.makeText(MainActivity.this, "加载网页源代码失败", 0).show();
										
									}else{
										tv_html_content.setText(content);
									}
								}
							});
						}
						
					} catch (MalformedURLException e) {
						
						e.printStackTrace();
					}catch (IOException e) {
						
						e.printStackTrace();
					}
					finally
					{
						if(null != conn)
						{
							conn.disconnect();
						}
					}
				}
			}).start();	
			
		} catch (MalformedURLException e) {
	
			e.printStackTrace();
		}
		
	}
	private String releaseInputStream(InputStream in) throws IOException{
		
		byte [] buffer = new byte[1024];
		ByteArrayOutputStream bytearray = new ByteArrayOutputStream();
		
		int len = 0;
		if(null==in){
			return null;
		}
		else{
			//正常解析
			while((len=in.read(buffer,0,1024))!=-1){
				
				bytearray.write(buffer);	
			}
			String content = bytearray.toString();
			if(content.indexOf("GBK")!=-1){
				
				/**
				 * 总结乱码问题：
				 * 1.项目的编码
				 * 2.网络编码
				 * 3.获取的时候流的编码
				 * 4.数据库的编码
				 */
				
				content = new String (bytearray.toByteArray(),"GBK");
				
			}
			bytearray.close();
		return content;
		}
	}
}