11_Android中HttpClient的应用，读取网络xml及xml解析流，Handler的应用，LayoutInflater的使用，SmartImageView的使用

<?xml version="1.0" encoding="UTF-8" ?>

<news>

         <new>

                   <title>3Q大战宣判: 腾讯获赔500万</title>

                   <detail>最高法驳回360上诉, 维持一审宣判.</detail>

                   <comment>6427</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/1.jpg</image>

         </new>

         <new>

                   <title>今日之声:北大雕塑被戴口罩</title>

                   <detail>市民: 因雾霾起诉环保局; 公务员谈"紧日子": 坚决不出去.</detail>

                   <comment>681</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/2.jpg</image>

         </new>

         <new>

                   <title>奥巴马见达赖是装蒜</title>

                   <detail>外文局: 国际民众认可中国大国地位;法院: "流量清零"未侵权.</detail>

                   <comment>1359</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/3.jpg</image>

         </new>

         <new>

                   <title>轻松一刻: 我要沉迷学习不自拔</title>

                   <detail>放假时我醒了不代表我起床了, 如今我起床了不代表我醒了!</detail>

                   <comment>10116</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/4.jpg</image>

         </new>

         <new>

                   <title>男女那些事儿</title>

                   <detail>"妈, 我在东莞被抓, 要2万保释金, 快汇钱到xxx!"</detail>

                   <comment>10339</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/5.jpg</image>

         </new>

         <new>

                   <title>3Q大战宣判: 腾讯获赔500万</title>

                   <detail>最高法驳回360上诉, 维持一审宣判.</detail>

                   <comment>6427</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/1.jpg</image>

         </new>

         <new>

                   <title>今日之声:北大雕塑被戴口罩</title>

                   <detail>市民: 因雾霾起诉环保局; 公务员谈"紧日子": 坚决不出去.</detail>

                   <comment>681</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/2.jpg</image>

         </new>

         <new>

                   <title>奥巴马见达赖是装蒜</title>

                   <detail>外文局: 国际民众认可中国大国地位;法院: "流量清零"未侵权.</detail>

                   <comment>1359</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/3.jpg</image>

         </new>

         <new>

                   <title>轻松一刻: 我要沉迷学习不自拔</title>

                   <detail>放假时我醒了不代表我起床了, 如今我起床了不代表我醒了!</detail>

                   <comment>10116</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/4.jpg</image>

         </new>

         <new>

                   <title>男女那些事儿</title>

                   <detail>"妈, 我在东莞被抓, 要2万保释金, 快汇钱到xxx!"</detail>

                   <comment>10339</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/5.jpg</image>

         </new>

         <new>

                   <title>3Q大战宣判: 腾讯获赔500万</title>

                   <detail>最高法驳回360上诉, 维持一审宣判.</detail>

                   <comment>6427</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/1.jpg</image>

         </new>

         <new>

                   <title>今日之声:北大雕塑被戴口罩</title>

                   <detail>市民: 因雾霾起诉环保局; 公务员谈"紧日子": 坚决不出去.</detail>

                   <comment>681</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/2.jpg</image>

         </new>

         <new>

                   <title>奥巴马见达赖是装蒜</title>

                   <detail>外文局: 国际民众认可中国大国地位;法院: "流量清零"未侵权.</detail>

                   <comment>1359</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/3.jpg</image>

         </new>

         <new>

                   <title>轻松一刻: 我要沉迷学习不自拔</title>

                   <detail>放假时我醒了不代表我起床了, 如今我起床了不代表我醒了!</detail>

                   <comment>10116</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/4.jpg</image>

         </new>

         <new>

                   <title>男女那些事儿</title>

                   <detail>"妈, 我在东莞被抓, 要2万保释金, 快汇钱到xxx!"</detail>

                   <comment>10339</comment>

                   <image>http://10.0.2.2:8080/NetEaseServer/images/5.jpg</image>

         </new>

</news>

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.itheima28.neteasedemo"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="19" />

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

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name="com.itheima28.neteasedemo.MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity" >

    <ListView

        android:id="@+id/lv_news"

        android:layout_width="match_parent"

        android:layout_height="match_parent" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:padding="5dip" >

    <com.loopj.android.image.SmartImageView

        android:id="@+id/siv_listview_item_icon"

        android:layout_width="100dip"

        android:layout_height="60dip"

        android:src="@drawable/a" />

    <TextView

        android:id="@+id/tv_listview_item_title"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginLeft="3dip"

        android:layout_toRightOf="@id/siv_listview_item_icon"

        android:singleLine="true"

        android:text="3Q大战宣判: 腾讯获赔500万"

        android:textColor="@android:color/black"

        android:textSize="17sp" />

    <TextView

        android:id="@+id/tv_listview_item_detail"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@id/tv_listview_item_title"

        android:layout_below="@id/tv_listview_item_title"

        android:layout_marginTop="3dip"

        android:text="啊发送旅客登机挥发速度发送旅客登机"

        android:textColor="@android:color/darker_gray"

        android:textSize="14sp" />

    <TextView

        android:id="@+id/tv_listview_item_comment"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentBottom="true"

        android:layout_alignParentRight="true"

        android:text="668跟帖"

        android:textColor="#FF0000"

        android:textSize="12sp" />

</RelativeLayout>

package com.loopj.android.image;

import android.content.Context;

import android.graphics.Bitmap;

public class BitmapImage implements SmartImage {

    private Bitmap bitmap;

    public BitmapImage(Bitmap bitmap) {

        this.bitmap = bitmap;

    }

    public Bitmap getBitmap(Context context) {

        return bitmap;

    }

}

package com.loopj.android.image;

import java.io.InputStream;

import android.content.ContentUris;

import android.content.ContentResolver;

import android.content.Context;

import android.provider.ContactsContract;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.net.Uri;

public class ContactImage implements SmartImage {

    private long contactId;

    public ContactImage(long contactId) {

        this.contactId = contactId;

    }

    public Bitmap getBitmap(Context context) {

        Bitmap bitmap = null;

        ContentResolver contentResolver = context.getContentResolver();

        try {

            Uri uri = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, contactId);

            InputStream input = ContactsContract.Contacts.openContactPhotoInputStream(contentResolver, uri);

            if(input != null) {

                bitmap = BitmapFactory.decodeStream(input);

            }

        } catch(Exception e) {

            e.printStackTrace();

        }

        return bitmap;

    }

}

package com.loopj.android.image;

import android.content.Context;

import android.graphics.Bitmap;

public interface SmartImage {

    public Bitmap getBitmap(Context context);

}

package com.loopj.android.image;

import android.content.Context;

import android.graphics.Bitmap;

import android.os.Handler;

import android.os.Message;

public class SmartImageTask implements Runnable {

    private static final int BITMAP_READY = 0;

    private boolean cancelled = false;

    private OnCompleteHandler onCompleteHandler;

    private SmartImage image;

    private Context context;

    public static class OnCompleteHandler extends Handler {

        @Override

        public void handleMessage(Message msg) {

            Bitmap bitmap = (Bitmap)msg.obj;

            onComplete(bitmap);

        }

        public void onComplete(Bitmap bitmap){};

    }

    public abstract static class OnCompleteListener {

        public abstract void onComplete();

    }

    public SmartImageTask(Context context, SmartImage image) {

        this.image = image;

        this.context = context;

    }

    @Override

    public void run() {

        if(image != null) {

            complete(image.getBitmap(context));

            context = null;

        }

    }

    public void setOnCompleteHandler(OnCompleteHandler handler){

        this.onCompleteHandler = handler;

    }

    public void cancel() {

        cancelled = true;

    }

    public void complete(Bitmap bitmap){

        if(onCompleteHandler != null && !cancelled) {

            onCompleteHandler.sendMessage(onCompleteHandler.obtainMessage(BITMAP_READY, bitmap));

        }

    }

}

package com.loopj.android.image;

import android.content.Context;

import android.graphics.Bitmap;

import android.util.AttributeSet;

import android.widget.ImageView;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

public class SmartImageView extends ImageView {

    private static final int LOADING_THREADS = 4;

    private static ExecutorService threadPool = Executors.newFixedThreadPool(LOADING_THREADS);

    private SmartImageTask currentTask;

    public SmartImageView(Context context) {

        super(context);

    }

    public SmartImageView(Context context, AttributeSet attrs) {

        super(context, attrs);

    }

    public SmartImageView(Context context, AttributeSet attrs, int defStyle) {

        super(context, attrs, defStyle);

    }

    // Helpers to set image by URL

    public void setImageUrl(String url) {

        setImage(new WebImage(url));

    }

    public void setImageUrl(String url, SmartImageTask.OnCompleteListener completeListener) {

        setImage(new WebImage(url), completeListener);

    }

    public void setImageUrl(String url, final Integer fallbackResource) {

        setImage(new WebImage(url), fallbackResource);

    }

    public void setImageUrl(String url, final Integer fallbackResource, SmartImageTask.OnCompleteListener completeListener) {

        setImage(new WebImage(url), fallbackResource, completeListener);

    }

    public void setImageUrl(String url, final Integer fallbackResource, final Integer loadingResource) {

        setImage(new WebImage(url), fallbackResource, loadingResource);

    }

    public void setImageUrl(String url, final Integer fallbackResource, final Integer loadingResource, SmartImageTask.OnCompleteListener completeListener) {

        setImage(new WebImage(url), fallbackResource, loadingResource, completeListener);

    }

    // Helpers to set image by contact address book id

    public void setImageContact(long contactId) {

        setImage(new ContactImage(contactId));

    }

    public void setImageContact(long contactId, final Integer fallbackResource) {

        setImage(new ContactImage(contactId), fallbackResource);

    }

    public void setImageContact(long contactId, final Integer fallbackResource, final Integer loadingResource) {

        setImage(new ContactImage(contactId), fallbackResource, fallbackResource);

    }

    // Set image using SmartImage object

    public void setImage(final SmartImage image) {

        setImage(image, null, null, null);

    }

    public void setImage(final SmartImage image, final SmartImageTask.OnCompleteListener completeListener) {

        setImage(image, null, null, completeListener);

    }

    public void setImage(final SmartImage image, final Integer fallbackResource) {

        setImage(image, fallbackResource, fallbackResource, null);

    }

    public void setImage(final SmartImage image, final Integer fallbackResource, SmartImageTask.OnCompleteListener completeListener) {

        setImage(image, fallbackResource, fallbackResource, completeListener);

    }

    public void setImage(final SmartImage image, final Integer fallbackResource, final Integer loadingResource) {

        setImage(image, fallbackResource, loadingResource, null);

    }

    public void setImage(final SmartImage image, final Integer fallbackResource, final Integer loadingResource, final SmartImageTask.OnCompleteListener completeListener) {

        // Set a loading resource

        if(loadingResource != null){

            setImageResource(loadingResource);

        }

        // Cancel any existing tasks for this image view

        if(currentTask != null) {

            currentTask.cancel();

            currentTask = null;

        }

        // Set up the new task

        currentTask = new SmartImageTask(getContext(), image);

        currentTask.setOnCompleteHandler(new SmartImageTask.OnCompleteHandler() {

            @Override

            public void onComplete(Bitmap bitmap) {

                if(bitmap != null) {

                    setImageBitmap(bitmap);

                } else {

                    // Set fallback resource

                    if(fallbackResource != null) {

                        setImageResource(fallbackResource);

                    }

                }

                if(completeListener != null){

                    completeListener.onComplete();

                }

            }

        });

        // Run the task in a threadpool

        threadPool.execute(currentTask);

    }

    public static void cancelAllTasks() {

        threadPool.shutdownNow();

        threadPool = Executors.newFixedThreadPool(LOADING_THREADS);

    }

}

package com.loopj.android.image;

import java.io.InputStream;

import java.net.URL;

import java.net.URLConnection;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

public class WebImage implements SmartImage {

    private static final int CONNECT_TIMEOUT = 5000;

    private static final int READ_TIMEOUT = 10000;

    private static WebImageCache webImageCache;

    private String url;

    public WebImage(String url) {

        this.url = url;

    }

    public Bitmap getBitmap(Context context) {

        // Don't leak context

        if(webImageCache == null) {

            webImageCache = new WebImageCache(context);

        }

        // Try getting bitmap from cache first

        Bitmap bitmap = null;

        if(url != null) {

            bitmap = webImageCache.get(url);

            if(bitmap == null) {

                bitmap = getBitmapFromUrl(url);

                if(bitmap != null){

                    webImageCache.put(url, bitmap);

                }

            }

        }

        return bitmap;

    }

    private Bitmap getBitmapFromUrl(String url) {

        Bitmap bitmap = null;

        try {

            URLConnection conn = new URL(url).openConnection();

            conn.setConnectTimeout(CONNECT_TIMEOUT);

            conn.setReadTimeout(READ_TIMEOUT);

            bitmap = BitmapFactory.decodeStream((InputStream) conn.getContent());

        } catch(Exception e) {

            e.printStackTrace();

        }

        return bitmap;

    }

    public static void removeFromCache(String url) {

        if(webImageCache != null) {

            webImageCache.remove(url);

        }

    }

}

                                      package com.loopj.android.image;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.lang.ref.SoftReference;

import java.util.concurrent.ConcurrentHashMap;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.Bitmap.CompressFormat;

import android.graphics.BitmapFactory;

public class WebImageCache {

    private static final String DISK_CACHE_PATH = "/web_image_cache/";

    private ConcurrentHashMap<String, SoftReference<Bitmap>> memoryCache;

    private String diskCachePath;

    private boolean diskCacheEnabled = false;

    private ExecutorService writeThread;

    public WebImageCache(Context context) {

        // Set up in-memory cache store

        memoryCache = new ConcurrentHashMap<String, SoftReference<Bitmap>>();

        // Set up disk cache store

        Context appContext = context.getApplicationContext();

        diskCachePath = appContext.getCacheDir().getAbsolutePath() + DISK_CACHE_PATH;

        File outFile = new File(diskCachePath);

        outFile.mkdirs();

        diskCacheEnabled = outFile.exists();

        // Set up threadpool for image fetching tasks

        writeThread = Executors.newSingleThreadExecutor();

    }

    public Bitmap get(final String url) {

        Bitmap bitmap = null;

        // Check for image in memory

        bitmap = getBitmapFromMemory(url);

        // Check for image on disk cache

        if(bitmap == null) {

            bitmap = getBitmapFromDisk(url);

            // Write bitmap back into memory cache

            if(bitmap != null) {

                cacheBitmapToMemory(url, bitmap);

            }

        }

        return bitmap;

    }

    public void put(String url, Bitmap bitmap) {

        cacheBitmapToMemory(url, bitmap);

        cacheBitmapToDisk(url, bitmap);

    }

    public void remove(String url) {

        if(url == null){

            return;

        }

        // Remove from memory cache

        memoryCache.remove(getCacheKey(url));

        // Remove from file cache

        File f = new File(diskCachePath, getCacheKey(url));

        if(f.exists() && f.isFile()) {

            f.delete();

        }

    }

    public void clear() {

        // Remove everything from memory cache

        memoryCache.clear();

        // Remove everything from file cache

        File cachedFileDir = new File(diskCachePath);

        if(cachedFileDir.exists() && cachedFileDir.isDirectory()) {

            File[] cachedFiles = cachedFileDir.listFiles();

            for(File f : cachedFiles) {

                if(f.exists() && f.isFile()) {

                    f.delete();

                }

            }

        }

    }

    private void cacheBitmapToMemory(final String url, final Bitmap bitmap) {

        memoryCache.put(getCacheKey(url), new SoftReference<Bitmap>(bitmap));

    }

    private void cacheBitmapToDisk(final String url, final Bitmap bitmap) {

        writeThread.execute(new Runnable() {

            @Override

            public void run() {

                if(diskCacheEnabled) {

                    BufferedOutputStream ostream = null;

                    try {

                        ostream = new BufferedOutputStream(new FileOutputStream(new File(diskCachePath, getCacheKey(url))), 2*1024);

                        bitmap.compress(CompressFormat.PNG, 100, ostream);

                    } catch (FileNotFoundException e) {

                        e.printStackTrace();

                    } finally {

                        try {

                            if(ostream != null) {

                                ostream.flush();

                                ostream.close();

                            }

                        } catch (IOException e) {}

                    }

                }

            }

        });

    }

    private Bitmap getBitmapFromMemory(String url) {

        Bitmap bitmap = null;

        SoftReference<Bitmap> softRef = memoryCache.get(getCacheKey(url));

        if(softRef != null){

            bitmap = softRef.get();

        }

        return bitmap;

    }

    private Bitmap getBitmapFromDisk(String url) {

        Bitmap bitmap = null;

        if(diskCacheEnabled){

            String filePath = getFilePath(url);

            File file = new File(filePath);

            if(file.exists()) {

                bitmap = BitmapFactory.decodeFile(filePath);

            }

        }

        return bitmap;

    }

    private String getFilePath(String url) {

        return diskCachePath + getCacheKey(url);

    }

    private String getCacheKey(String url) {

        if(url == null){

            throw new RuntimeException("Null url passed in");

        } else {

            return url.replaceAll("[.:/,%?&=]", "+").replaceAll("[+]+", "+");

        }

    }

}

package com.itheima28.neteasedemo.domain;

/**

 * @author andong

 * 新闻信息实体类

 */

public class NewInfo {

    private String title; // 标题

    private String detail; // 详细

    private Integer comment; // 跟帖数量

    private String imageUrl; // 图片连接

    @Override

    public String toString() {

       return "NewInfo [title=" + title + ", detail=" + detail + ", comment="

              + comment + ", imageUrl=" + imageUrl + "]";

    }

    public NewInfo(String title, String detail, Integer comment, String imageUrl) {

       super();

       this.title = title;

       this.detail = detail;

       this.comment = comment;

       this.imageUrl = imageUrl;

    }

    public NewInfo() {

       super();

       // TODO Auto-generated constructor stub

    }

    public String getTitle() {

       return title;

    }

    public void setTitle(String title) {

       this.title = title;

    }

    public String getDetail() {

       return detail;

    }

    public void setDetail(String detail) {

       this.detail = detail;

    }

    public Integer getComment() {

       return comment;

    }

    public void setComment(Integer comment) {

       this.comment = comment;

    }

    public String getImageUrl() {

       return imageUrl;

    }

    public void setImageUrl(String imageUrl) {

       this.imageUrl = imageUrl;

    }

}

package com.itheima28.neteasedemo;

import java.io.InputStream;

import java.util.ArrayList;

import java.util.List;

import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.impl.client.DefaultHttpClient;

import org.xmlpull.v1.XmlPullParser;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.util.Log;

import android.util.Xml;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.Toast;

import com.itheima28.neteasedemo.domain.NewInfo;

import com.loopj.android.image.SmartImageView;

public class MainActivity extends Activity {

    private static final String TAG = "MainActivity";

    private final int SUCCESS = 0;

    private final int FAILED = 1;

    private ListView lvNews;

    private List<NewInfo> newInfoList;

    private Handler handler = new Handler() {

       /**

         * 接收消息

         */

       @Override

       public void handleMessage(Message msg) {

           switch (msg.what) {

           case SUCCESS:// 访问成功, 有数据

              // 给Listview列表绑定数据

              newInfoList = (List<NewInfo>) msg.obj;

              MyAdapter adapter = new MyAdapter();

              lvNews.setAdapter(adapter);

              break;

           case FAILED:  // 无数据

              Toast.makeText(MainActivity.this, "当前网络崩溃了.", 0).show();

              break;

           default:

              break;

           }

       }

    };

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        init();

    }

    private void init() {

       lvNews = (ListView) findViewById(R.id.lv_news);

       // 抓取新闻数据

       new Thread(new Runnable() {

           @Override

           public void run() {

              // 获得新闻集合

              List<NewInfo> newInfoList = getNewsFromInternet();

              Message msg = new Message();

              if(newInfoList != null) {

                  msg.what = SUCCESS;

                  msg.obj = newInfoList;

              } else {

                  msg.what = FAILED;

              }

              handler.sendMessage(msg);

           }

       }).start();

    }

    /**

     * 返回新闻信息

     */

    private List<NewInfo> getNewsFromInternet() {

       HttpClient client = null;

       try {

           // 定义一个客户端

           client = new DefaultHttpClient();

           // 定义get方法

           HttpGet get = new HttpGet("http://114.215.142.191:8080/NetEaseServer/new.xml");

           // 执行请求

           HttpResponse response = client.execute(get);

           int statusCode = response.getStatusLine().getStatusCode();

           if(statusCode == 200) {

              InputStream is = response.getEntity().getContent();

              List<NewInfo> newInfoList = getNewListFromInputStream(is);

              return newInfoList;

           } else {

              Log.i(TAG, "访问失败: " + statusCode);

           }

       } catch (Exception e) {

           e.printStackTrace();

       } finally {

           if(client != null) {

              client.getConnectionManager().shutdown();     // 关闭和释放资源

           }

       }

       return null;

    }

    /**

     * 从流中解析新闻集合

     * @param is

     * @return

     */

    private List<NewInfo> getNewListFromInputStream(InputStream is) throws Exception {

       XmlPullParser parser = Xml.newPullParser();   // 创建一个pull解析器

       parser.setInput(is, "utf-8");   // 指定解析流, 和编码

       int eventType = parser.getEventType();

       List<NewInfo> newInfoList = null;

       NewInfo newInfo = null;

       while(eventType != XmlPullParser.END_DOCUMENT) { // 如果没有到结尾处, 继续循环

           String tagName = parser.getName(); // 节点名称

           switch (eventType) {

           case XmlPullParser.START_TAG: // <news>

              if("news".equals(tagName)) {

                  newInfoList = new ArrayList<NewInfo>();

              } else if("new".equals(tagName)) {

                  newInfo = new NewInfo();

              } else if("title".equals(tagName)) {

                  newInfo.setTitle(parser.nextText());

              } else if("detail".equals(tagName)) {

                  newInfo.setDetail(parser.nextText());

              } else if("comment".equals(tagName)) {

                  newInfo.setComment(Integer.valueOf(parser.nextText()));

              } else if("image".equals(tagName)) {

                  newInfo.setImageUrl(parser.nextText());

               }

              break;

           case XmlPullParser.END_TAG: // </news>

              if("new".equals(tagName)) {

                  newInfoList.add(newInfo);

              }

              break;

           default:

              break;

           }

           eventType = parser.next();      // 取下一个事件类型

       }

       return newInfoList;

    }

    class MyAdapter extends BaseAdapter {

       /**

        * 返回列表的总长度

        */

       @Override

       public int getCount() {

           return newInfoList.size();

       }

       /**

        * 返回一个列表的子条目的布局

        */

       @Override

       public View getView(int position, View convertView, ViewGroup parent) {

           View view = null;

           if(convertView == null) {

              LayoutInflater inflater = getLayoutInflater();

              view = inflater.inflate(R.layout.listview_item, null);

           } else {

              view = convertView;

           }

           // 重新赋值, 不会产生缓存对象中原有数据保留的现象

           SmartImageView sivIcon = (SmartImageView) view.findViewById(R.id.siv_listview_item_icon);

           TextView tvTitle = (TextView) view.findViewById(R.id.tv_listview_item_title);

           TextView tvDetail = (TextView) view.findViewById(R.id.tv_listview_item_detail);

           TextView tvComment = (TextView) view.findViewById(R.id.tv_listview_item_comment);

           NewInfo newInfo = newInfoList.get(position);

           sivIcon.setImageUrl(newInfo.getImageUrl());      // 设置图片

           tvTitle.setText(newInfo.getTitle());

           tvDetail.setText(newInfo.getDetail());

           tvComment.setText(newInfo.getComment() + "跟帖");

           return view;

       }

       @Override

       public Object getItem(int position) {

           return null;

       }

       @Override

       public long getItemId(int position) {

           return 0;

       }        

    }

}