解析html

Mainfest.xml 中：

 <uses-permission android:name="android.permission.INTERNET"/>

java代码：

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() {   //runOnUiThread UI线程

@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 (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;
}
}


}