HttpClient请求网络 xml解析

package com.example.myweathertest;

import java.io.IOException;
import java.io.StringReader;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements OnClickListener {
private Button mButtonRequest;
private TextView mTextView;
String city ;
String weather;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mButtonRequest = (Button) findViewById(R.id.button_request);
mTextView = (TextView) findViewById(R.id.textview);
mButtonRequest.setOnClickListener(this);
}

@Override
public void onClick(View view) {
switch (view.getId()){
case R.id.button_request:
sendRequestWithHttpClient();
mTextView.setText(city);
break;
default:
break;
}
}
//新开一个线程请求网络，用HttpClient
public void sendRequestWithHttpClient(){
new Thread(new Runnable() {
@Override
public void run() {

try {
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet("http://php.weather.sina.com.cn/xml.php?city=%B1%B1%BE%A9&password=DJOYnieT8234jlsK&day=0");
HttpResponse httpResponse = httpClient.execute(httpGet);
if(httpResponse.getStatusLine().getStatusCode() == 200){
HttpEntity entity = httpResponse.getEntity();
String response = EntityUtils.toString(entity,"utf-8");
parseXMLWithPull(response);
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}
}).start();
}
//解析得到的数据
private void parseXMLWithPull(String xmlData){
try {
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
XmlPullParser xmlPullParser = factory.newPullParser();
xmlPullParser.setInput(new StringReader(xmlData));
int eventType = xmlPullParser.getEventType();
city = "";
weather = "";
while(eventType != XmlPullParser.END_DOCUMENT){
String nodeName = xmlPullParser.getName();
switch (eventType) {
//开始解析某个节点
case XmlPullParser.START_TAG:
if("city".equals(nodeName)){
city = xmlPullParser.nextText();
}else if("weather".equals(nodeName)){
weather = xmlPullParser.nextText();
}

break;
case XmlPullParser.END_TAG:
if("app".equals(nodeName)){
Log.d("MainActivity","city is" + city);
Log.d("MainActivity","weather is" + weather);
}
break;

default:
break;
}
eventType = xmlPullParser.next();
}

} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}
}