新闻客户端

package com.example.news;

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import com.loopj.android.image.SmartImageView;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.util.Xml;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity {
    private List<News> list;
    private ListView lv;
    
    Handler handler = new Handler(){
        public void handleMessage(android.os.Message msg) {
            switch (msg.what) {
            case 1:
                lv = (ListView) findViewById(R.id.lv);
                lv.setAdapter(new MyAdapter());
                
                break;

            }
        };
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //因为这里解析xml文件是在子线程里做的，而lv.setAdapter(new MyAdapter());是在主线程里做的
        //如果主线程先执行的话，子线程xml还没有解析完，就会报空指针异常
        //lv.setAdapter(new MyAdapter());
        getInfo();
        
    }
    private class MyAdapter extends BaseAdapter{

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return list.size();
        }

        @Override
        public Object getItem(int arg0) {
            // TODO Auto-generated method stub
            return null;
        }

        @Override
        public long getItemId(int arg0) {
            // TODO Auto-generated method stub
            return 0;
        }

        @Override
        public View getView(int arg0, View view, ViewGroup arg2) {
            News news  = list.get(arg0);
            ViewHolder myHolder;
            View v=null;
            if(view == null){
                v = View.inflate(MainActivity.this, R.layout.item_lv, null);
                myHolder = new ViewHolder();
                myHolder.img = (SmartImageView) v.findViewById(R.id.img);
                myHolder.tv_title = (TextView) v.findViewById(R.id.tv_title);
                myHolder.tv_show = (TextView) v.findViewById(R.id.tv_show);
                myHolder.tv_num = (TextView) v.findViewById(R.id.tv_num);
                v.setTag(myHolder);
            }else{
                v = view;
                myHolder = (ViewHolder) v.getTag();
            }
            
            myHolder.tv_title.setText(news.getTitle());
            myHolder.tv_show.setText(news.getDetail());
            myHolder.tv_num.setText(news.getComment()+"条评论");
            myHolder.img.setImageUrl(news.getImage());
            
            return v;
        }
        class ViewHolder{
            SmartImageView img ;
            TextView tv_title ;
            TextView tv_show;
            TextView tv_num;
        }
        
    }

    private void getInfo() {
        Thread t = new Thread() {
            @Override
            public void run() {
                String path = "http://192.168.0.111:8080/images/news.xml";
                try {
                    URL url = new URL(path);
                    HttpURLConnection conn = (HttpURLConnection) url
                            .openConnection();
                    conn.setRequestMethod("GET");
                    conn.setConnectTimeout(5000);
                    conn.setReadTimeout(5000);
                    if (conn.getResponseCode() == 200) {
                        InputStream in = conn.getInputStream();
                        //pull解析xml文件
                        parseNews(in);

                    } else {

                    }

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

        };
        t.start();
    }

    private void parseNews(InputStream in) {
        XmlPullParser xp = Xml.newPullParser();
        try {
            // 初始化
            xp.setInput(in, "utf-8");
            // 返回节点类型
            int type = xp.getEventType();
            News news = null;
            while (type != XmlPullParser.END_DOCUMENT) {
                switch (type) {
                case XmlPullParser.START_TAG:
                    if ("newslist".equals(xp.getName())) {
                        list = new ArrayList<News>();
                    } else if ("news".equals(xp.getName())) {
                        news = new News();
                    } else if ("title".equals(xp.getName())) {
                        news.setTitle(xp.nextText());
                    } else if ("detail".equals(xp.getName())) {
                        news.setDetail(xp.nextText());
                    } else if ("comment".equals(xp.getName())) {
                        news.setComment(xp.nextText());
                    } else if ("image".equals(xp.getName())) {
                        news.setImage(xp.nextText());
                    }

                    break;
                case XmlPullParser.END_TAG:
                    if ("news".equals(xp.getName())) {
                        list.add(news);
                    }
                    break;

                }

                // 移动到下一个节点
                type = xp.next();
            }
//            for (int i = 0; i < list.size(); i++) {
//                
//                System.out.println(list.get(i).toString());
//            }
            //必须得在解析之后才能给listview设置适配器
            handler.sendEmptyMessage(1);
            

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

}

<?xml version="1.0" encoding="UTF-8"?>
-<newslist> -<news> <title>黑马52期就业快报</title> <detail>热烈祝贺黑马52期平均薪水突破13k</detail> <comment>15687</comment> <image>http://192.168.0.111:8080/images/6.jpg</image> </news> -<news> <title>程序员因写代码太乱被杀害</title> <detail>凶手是死者同事，维护死者代码时完全看不懂而痛下杀手</detail> <comment>16359</comment> <image>http://192.168.0.111:8080/images/7.jpg</image> </news> -<news> <title>产品经理因频繁改需求被杀害</title> <detail>凶手是一名程序员，因死者对项目需求频繁改动而痛下杀手</detail> <comment>14112</comment> <image>http://192.168.0.111:8080/images/7.jpg</image> </news> -<news> <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://192.168.0.111:8080/images/1.jpg</image> </news> -<news> <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://192.168.0.111:8080/images/2.jpg</image> </news> -<news> <title>奥巴马见是装蒜</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://192.168.0.111:8080/images/3.jpg</image> </news> -<news> <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>11616</comment> <image>http://192.168.0.111:8080/images/4.jpg</image> </news> -<news> <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://192.168.0.111:8080/images/5.jpg</image> </news> -<news> <title>赵帅哥语录一</title> <detail>少壮不努力，老大做IT</detail> <comment>14612</comment> <image>http://192.168.0.111:8080/images/8.jpg</image> </news> -<news> <title>赵帅哥语录二</title> <detail>问君能有几多愁，恰似调完代码改需求</detail> <comment>13230</comment> <image>http://192.168.0.111:8080/images/8.jpg</image> </news> -<news> <title>赵帅哥语录三</title> <detail>觉得我帅的人工资一般都比较高</detail> <comment>9928</comment> <image>http://192.168.0.111:8080/images/8.jpg</image> </news> -<news> <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://192.168.0.111:8080/images/2.jpg</image> </news> -<news> <title>奥巴马是装蒜</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://192.168.0.111:8080/images/3.jpg</image> </news> </newslist>

package com.example.news;

public class News {
    private String title;
    private String detail;
    private String comment;
    private String image;
    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 String getComment() {
        return comment;
    }
    public void setComment(String comment) {
        this.comment = comment;
    }
    public String getImage() {
        return image;
    }
    public void setImage(String image) {
        this.image = image;
    }
    @Override
    public String toString() {
        return "News [title=" + title + ", detail=" + detail + ", comment="
                + comment + ", image=" + image + "]";
    }
    
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal" >

    <com.loopj.android.image.SmartImageView
        android:id="@+id/img"
        android:layout_width="90dp"
        android:layout_height="90dp"
        android:src="@drawable/ic_launcher" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/tv_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:singleLine="true"
            android:text="阿是讲道理费劲啊实例叠加飞拉萨的减肥蓝色"
            android:textSize="25sp" />


        <TextView
            android:id="@+id/tv_show"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:lines="2"
            android:text="阿是讲道理费劲啊实例叠sfasfasdfasdasdfasdfasdfas加飞拉萨的减肥蓝色"
            android:textColor="@android:color/darker_gray" />
        
        <TextView
            android:id="@+id/tv_num"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:singleLine="true"
            android:text="1000条评论"
            android:textColor="#ff0000" 
            android:gravity="right"/>
    </LinearLayout>

</LinearLayout>