获取网路xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.g160628_android_y230_jiexixml.MainActivity">
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="获取xml"
        android:onClick="getxml"
        />


</LinearLayout>


import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

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

 public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.i("test","dwdw");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public void getxml(View view){
            new mytask().execute();
    }
    class  mytask extends AsyncTask{

        @Override
        protected Object doInBackground(Object[] params) {
            //获取xml网路数据
            String path="http://193.168.1.76:8080/students.xml";
            try {
                URL url=new URL(path);
                HttpURLConnection httpURLConnection= (HttpURLConnection) url.openConnection();
                //设置请求方式
                httpURLConnection.setRequestMethod("GET");
                //设置超时的时间
                httpURLConnection.setConnectTimeout(5000);
                //获取结果码
               int code= httpURLConnection.getResponseCode();
                if(code==200){
                    //获取数据
                    InputStream is=httpURLConnection.getInputStream();
                    int len=0;
                    byte []bs=new byte[1024];
                    StringBuffer stringBuffer=new StringBuffer();
                    while((len=is.read())!=-1){
                            String s=new String(bs,0,len);
                            stringBuffer.append(s);
                        Log.i("test",stringBuffer.toString());
                        is.close();
                    }
                }
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(Object o) {
            super.onPostExecute(o);
        }

    }
}