//解析html
package com.xh.tx.html;
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.view.Menu;import android.view.MenuItem;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 public 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 e1) { e1.printStackTrace(); } } public 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 || content.indexOf("gbk") != -1) { //content = new String(content.getBytes(),"gbk"); //中国 》》 01 10 //只针对网页 解决乱码问题 /** * 总结乱码问题: * 以后做项目统一几个编码 * 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; } }}