网络请求（listview json解析 数据库存储）【周五01.08】

adapter 包

MyBaseAdapter类

 1 package com.cp.adapter;

import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.cp.day07zuoye.R;
import com.cp.vo.NewsList;
import com.lidroid.xutils.BitmapUtils;

public class MyBaseAdapter extends BaseAdapter{
    private Context con;
    private List<NewsList> list;
    //创建构造器获取上下文菜单和集合
    public MyBaseAdapter(Context con,List<NewsList> list){
        this.con = con;
        this.list = list;
    }
    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if(convertView == null){
            holder = new ViewHolder();
            convertView = LayoutInflater.from(con).inflate(R.layout.list_item, null);
            holder.image = (ImageView) convertView.findViewById(R.id.image);
            holder.title = (TextView) convertView.findViewById(R.id.title);
            holder.intro = (TextView) convertView.findViewById(R.id.intro);
            convertView.setTag(holder);
        }else{
            holder = (ViewHolder) convertView.getTag();
        }
        NewsList news = list.get(position);
        //利用BitmapUtils类加载图片到ImageView上
        BitmapUtils bit = new BitmapUtils(con);
        bit.display(holder.image, news.getPic());
        holder.title.setText(news.getTitle());
        holder.intro.setText(news.getIntro());
        return convertView;
    }
    //内部持有类
    class ViewHolder{
        ImageView image;
        TextView title;
        TextView intro;
    }
}

MyCollBaseAdapter类

package com.cp.adapter;

import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.cp.day07zuoye.R;
import com.cp.vo.Collection;
import com.cp.vo.NewsList;
import com.lidroid.xutils.BitmapUtils;

public class MyCollBaseAdapter extends BaseAdapter{
    private Context con;
    private List<Collection> list;

    public MyCollBaseAdapter(Context con,List<Collection> list){
        this.con = con;
        this.list = list;
    }
    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if(convertView == null){
            holder = new ViewHolder();
            convertView = LayoutInflater.from(con).inflate(R.layout.list_item, null);
            holder.image = (ImageView) convertView.findViewById(R.id.image);
            holder.title = (TextView) convertView.findViewById(R.id.title);
            holder.intro = (TextView) convertView.findViewById(R.id.intro);
            convertView.setTag(holder);
        }else{
            holder = (ViewHolder) convertView.getTag();
        }
        Collection news = list.get(position);
        BitmapUtils bit = new BitmapUtils(con);
        bit.display(holder.image, news.getPic());
        holder.title.setText(news.getTitle());
        holder.intro.setText(news.getIntro());
        return convertView;
    }
    class ViewHolder{
        ImageView image;
        TextView title;
        TextView intro;
    }
}

day07zuoye包

MainActivity

package com.cp.day07zuoye;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;

import com.cp.adapter.MyBaseAdapter;
import com.cp.vo.Collection;
import com.cp.vo.MyData;
import com.cp.vo.NewsList;
import com.google.gson.Gson;
import com.lidroid.xutils.DbUtils;
import com.lidroid.xutils.exception.DbException;

public class MainActivity extends Activity {
    //新闻地址
    public static final String NEWSURL = "http://api.sina.cn/sinago/list.json?channel=hdpic_story&adid=4ad30dabe134695c3d7c3a65977d7e72&from=6042095012&chwm=12050_0001&imei=867064013906290&uid=802909da86d9f5fc&p=1";
    private List<NewsList> news;
    Handler handler = new Handler(){

        public void handleMessage(android.os.Message msg) {
            MyData mydata = parseJson((String)msg.obj);
            news = mydata.getData().getList();
            insertData(news);
            MyBaseAdapter adapter = new MyBaseAdapter(MainActivity.this, news);
            newsList.setAdapter(adapter);
        };
    };
    private ListView newsList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
        
    }
    private void init() {
        //找到一个控件
        newsList = (ListView)findViewById(R.id.newsList);
        //在子线程中请求网络
        new Thread(){
            public void run() {
                String json = getJsonFromHttp(NEWSURL);
                Message msg = new Message();
                msg.obj = json;
                handler.sendMessage(msg);
            };
        }.start();
        //listView的条目监听
        newsList.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View view, int position,
                    long arg3) {
                //获取条目所对应的newslist对象
                NewsList n = news.get(position);
                //通过Bundle传递newslist对象
                Intent intent = new Intent(MainActivity.this,NewsInformation.class);
                Bundle b = new Bundle();
                b.putSerializable("news", n);
                intent.putExtras(b);
                startActivity(intent);
            }
            
        });
        
    }
    
    //请求json数据
    public String getJsonFromHttp(String uri){
        URL url;
        StringBuffer sb = new StringBuffer();
        try {
            url = new URL(uri);
            HttpURLConnection httpUrl = (HttpURLConnection) url.openConnection();
            httpUrl.setRequestMethod("GET");
            httpUrl.setConnectTimeout(5000);
            httpUrl.setReadTimeout(5000);
            if(httpUrl.getResponseCode() == 200){
                BufferedReader br = new BufferedReader(new InputStreamReader(httpUrl.getInputStream(),"utf-8"));
                String str = "";
                while((str = br.readLine()) != null){
                    sb.append(str);
                }
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return sb.toString();
    }
    
    //解析json数据
    public MyData parseJson(String json){
        Gson g = new Gson();
        MyData mydata = g.fromJson(json, MyData.class);
        return mydata;
    }

    
    //创建并添加数据到数据库的方法
    public void insertData(List<NewsList> list){
        DbUtils db = DbUtils.create(MainActivity.this, "newsData");
        try {
            db.createTableIfNotExist(NewsList.class);
            db.createTableIfNotExist(Collection.class);
            db.saveAll(list);
        } catch (DbException e) {
            e.printStackTrace();
        }
    }
    
    @Override
    protected void onDestroy() {
        super.onDestroy();
        //Activity销毁时将newslist表中的数据清空
        DbUtils db = DbUtils.create(MainActivity.this, "newsData");
        try {
            db.deleteAll(NewsList.class);
        } catch (DbException e) {
            e.printStackTrace();
        }
    }
    
    
    
    
    

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

}

MyCollection

package com.cp.day07zuoye;

import java.util.List;

import com.cp.adapter.MyBaseAdapter;
import com.cp.adapter.MyCollBaseAdapter;
import com.cp.vo.Collection;
import com.lidroid.xutils.DbUtils;
import com.lidroid.xutils.exception.DbException;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.widget.ListView;

public class MyCollection extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my_collection);
        init();
    }

    private void init() {
        ListView listView = (ListView)findViewById(R.id.myListView);
        //创建适配器
        MyCollBaseAdapter adapter = new MyCollBaseAdapter(MyCollection.this, findAllData());
        //加载适配器
        listView.setAdapter(adapter);
    }
    
    //查询收藏表全查
    public List<Collection> findAllData(){
        DbUtils db = DbUtils.create(MyCollection.this, "newsData");
        List<Collection> list = null;
        try {
            list =  db.findAll(Collection.class);
        } catch (DbException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return list;
    }

}

NewsInformation

package com.cp.day07zuoye;

import java.lang.reflect.InvocationTargetException;
import java.util.List;

import org.apache.commons.beanutils.BeanUtils;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.cp.helper.MyHelper;
import com.cp.vo.Collection;
import com.cp.vo.NewsList;
import com.lidroid.xutils.BitmapUtils;
import com.lidroid.xutils.DbUtils;
import com.lidroid.xutils.db.sqlite.Selector;
import com.lidroid.xutils.exception.DbException;

public class NewsInformation extends Activity implements OnClickListener {

    private NewsList newslist;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_news_information);
        init();
    }
    private void init() {
        //获取控件
        ImageView image = (ImageView)findViewById(R.id.info_image);
        TextView infoTitle = (TextView)findViewById(R.id.info_title);
        TextView infoLongTitle = (TextView)findViewById(R.id.info_longtitle);
        TextView infoIntro = (TextView)findViewById(R.id.info_intro);
        Button collection = (Button)findViewById(R.id.collection);
        Button mine = (Button)findViewById(R.id.mine);
        Button back = (Button)findViewById(R.id.back);
        //注册监听
        collection.setOnClickListener(this);
        mine.setOnClickListener(this);
        back.setOnClickListener(this);
        //得到Intent
        Intent intent = getIntent();
        //得到Bundle
        Bundle b = intent.getExtras();
        //得到传递过来的对象
        newslist = (NewsList) b.getSerializable("news");
        //给各个控件赋值
        BitmapUtils bit = new BitmapUtils(NewsInformation.this);
        bit.display(image, newslist.getKpic());
        infoTitle.setText(newslist.getTitle());
        infoLongTitle.setText(newslist.getLong_title());
        infoIntro.setText(newslist.getIntro());
        
    }
    //按钮监听
    @Override
    public void onClick(View v) {
        switch(v.getId()){
        case R.id.collection:
            //点击收藏保存到收藏表中
            DbUtils db = DbUtils.create(NewsInformation.this, "newsData");
            try {
                Collection  c = new Collection();
                //commons-beanutils-1.8.3.jar
                //BeanUtils.copyProperties(c,newslist);
                c.setPic(newslist.getPic());
                c.setTitle(newslist.getTitle());
                c.setIntro(newslist.getIntro());
                c.setId(newslist.getId());
                //如果收藏过就吐司提示不再收藏
                if(findData(c.getId())){
                    Toast.makeText(NewsInformation.this, "已经收藏过", 0).show();
                    return;
                }
                db.save(c);
                Toast.makeText(NewsInformation.this, "收藏成功", 0).show();
            } catch (DbException e) {
                e.printStackTrace();
            } 
            break;
        case R.id.mine:
            //跳转到我的收藏界面
            Intent intent = new Intent(NewsInformation.this,MyCollection.class);
            startActivity(intent);
            break;
        case R.id.back:
            //返回
            finish();
            break;
        }
    }
    
    
    //根据id查询数据库的方法
    public boolean findData(String id){
        boolean b = false;
        DbUtils db = DbUtils.create(NewsInformation.this, "newsData");
        MyHelper helper = new MyHelper(NewsInformation.this, "newsData", null, 1);
        SQLiteDatabase sdb = helper.getReadableDatabase();
        
        try {
            //Cursor c = (Cursor) db.findAll(Selector.from(Collection.class).where("id", "=", id));
            Cursor c = sdb.query("com_cp_vo_Collection", null, "id = ?", new String[]{id}, null, null, null);
            b = c.moveToNext();
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            sdb.close();
        }
        return b;
    }
    
    


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_news_information, menu);
        return true;
    }

}

helper包

MyHelper类
 1 package com.cp.helper;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;

public class MyHelper extends SQLiteOpenHelper{

    public MyHelper(Context context, String name, CursorFactory factory,
            int version) {
        super(context, name, factory, version);
        // TODO Auto-generated constructor stub
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // TODO Auto-generated method stub
        
    }

}

vo

Collection

package com.cp.vo;

import com.lidroid.xutils.db.annotation.Id;
//收藏表类
public class Collection {
    @Id
    private int n_id;
    private int articlePubDate;
    private String bpic;
    private String category;
    private int comment;
    private CommentCountInfo comment_count_info;
    private String comments;
    private String feedShowStyle;
    private String id;
    private String intro;
    private String kpic;
    private String link;
    private String long_title;
    private String pic;
    private MyPics pics;
    private long pubDate;
    private String source;
    private String title;
    public int getArticlePubDate() {
        return articlePubDate;
    }
    public void setArticlePubDate(int articlePubDate) {
        this.articlePubDate = articlePubDate;
    }
    public String getBpic() {
        return bpic;
    }
    public void setBpic(String bpic) {
        this.bpic = bpic;
    }
    public String getCategory() {
        return category;
    }
    public void setCategory(String category) {
        this.category = category;
    }
    public int getComment() {
        return comment;
    }
    public void setComment(int comment) {
        this.comment = comment;
    }
    public CommentCountInfo getComment_count_info() {
        return comment_count_info;
    }
    public void setComment_count_info(CommentCountInfo comment_count_info) {
        this.comment_count_info = comment_count_info;
    }
    public String getComments() {
        return comments;
    }
    public void setComments(String comments) {
        this.comments = comments;
    }
    public String getFeedShowStyle() {
        return feedShowStyle;
    }
    public void setFeedShowStyle(String feedShowStyle) {
        this.feedShowStyle = feedShowStyle;
    }
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getIntro() {
        return intro;
    }
    public void setIntro(String intro) {
        this.intro = intro;
    }
    public String getKpic() {
        return kpic;
    }
    public void setKpic(String kpic) {
        this.kpic = kpic;
    }
    public String getLink() {
        return link;
    }
    public void setLink(String link) {
        this.link = link;
    }
    public String getLong_title() {
        return long_title;
    }
    public void setLong_title(String long_title) {
        this.long_title = long_title;
    }
    public String getPic() {
        return pic;
    }
    public void setPic(String pic) {
        this.pic = pic;
    }
    public MyPics getPics() {
        return pics;
    }
    public void setPics(MyPics pics) {
        this.pics = pics;
    }
    public long getPubDate() {
        return pubDate;
    }
    public void setPubDate(long pubDate) {
        this.pubDate = pubDate;
    }
    public String getSource() {
        return source;
    }
    public void setSource(String source) {
        this.source = source;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
}

CommentCountInfo

package com.cp.vo;

import java.io.Serializable;

public class CommentCountInfo implements Serializable {
    private int comment_status;
    private int praise;
    private int dispraise;
    private int qreply;
    private int show;
    private int total;
    public int getComment_status() {
        return comment_status;
    }
    public void setComment_status(int comment_status) {
        this.comment_status = comment_status;
    }
    public int getPraise() {
        return praise;
    }
    public void setPraise(int praise) {
        this.praise = praise;
    }
    public int getDispraise() {
        return dispraise;
    }
    public void setDispraise(int dispraise) {
        this.dispraise = dispraise;
    }
    public int getQreply() {
        return qreply;
    }
    public void setQreply(int qreply) {
        this.qreply = qreply;
    }
    public int getShow() {
        return show;
    }
    public void setShow(int show) {
        this.show = show;
    }
    public int getTotal() {
        return total;
    }
    public void setTotal(int total) {
        this.total = total;
    }
    @Override
    public String toString() {
        return "CommentCountInfo [comment_status=" + comment_status
                + ", praise=" + praise + ", dispraise=" + dispraise
                + ", qreply=" + qreply + ", show=" + show + ", total=" + total
                + "]";
    }
    
}

MyContent

package com.cp.vo;

import java.util.List;

public class MyContent {
    private String is_intro;
    private List<NewsList> list;
    public List<NewsList> getList() {
        return list;
    }
    public void setList(List<NewsList> list) {
        this.list = list;
    }
    public String getIs_intro() {
        return is_intro;
    }
    public void setIs_intro(String is_intro) {
        this.is_intro = is_intro;
    }
    @Override
    public String toString() {
        return "MyContent [is_intro=" + is_intro + ", list=" + list + "]";
    }
    
}

MyData

package com.cp.vo;

public class MyData {
    private MyContent data;
    private int status;
    public MyContent getData() {
        return data;
    }
    public void setData(MyContent data) {
        this.data = data;
    }
    public int getStatus() {
        return status;
    }
    public void setStatus(int status) {
        this.status = status;
    }
    @Override
    public String toString() {
        return "MyData [data=" + data + ", status=" + status + "]";
    }
    
    
}

MyPics

package com.cp.vo;

import java.io.Serializable;
import java.util.List;

public class MyPics implements Serializable{
    private List<Pics> list;
    private int picTemplate;
    private int total;
    public List<Pics> getList() {
        return list;
    }
    public void setList(List<Pics> list) {
        this.list = list;
    }
    public int getPicTemplate() {
        return picTemplate;
    }
    public void setPicTemplate(int picTemplate) {
        this.picTemplate = picTemplate;
    }
    public int getTotal() {
        return total;
    }
    public void setTotal(int total) {
        this.total = total;
    }
    @Override
    public String toString() {
        return "MyPics [list=" + list + ", picTemplate=" + picTemplate
                + ", total=" + total + "]";
    }
    
}

NewsList

package com.cp.vo;

import java.io.Serializable;

import com.lidroid.xutils.db.annotation.Id;

public class NewsList implements Serializable {
    @Id
    private int n_id;
    private int articlePubDate;
    private String bpic;
    private String category;
    private int comment;
    private CommentCountInfo comment_count_info;
    private String comments;
    private String feedShowStyle;
    private String id;
    private String intro;
    private String kpic;
    private String link;
    private String long_title;
    private String pic;
    private MyPics pics;
    private long pubDate;
    private String source;
    private String title;
    public int getArticlePubDate() {
        return articlePubDate;
    }
    public void setArticlePubDate(int articlePubDate) {
        this.articlePubDate = articlePubDate;
    }
    public String getBpic() {
        return bpic;
    }
    public void setBpic(String bpic) {
        this.bpic = bpic;
    }
    public String getCategory() {
        return category;
    }
    public void setCategory(String category) {
        this.category = category;
    }
    public int getComment() {
        return comment;
    }
    public void setComment(int comment) {
        this.comment = comment;
    }
    public CommentCountInfo getComment_count_info() {
        return comment_count_info;
    }
    public void setComment_count_info(CommentCountInfo comment_count_info) {
        this.comment_count_info = comment_count_info;
    }
    public String getComments() {
        return comments;
    }
    public void setComments(String comments) {
        this.comments = comments;
    }
    public String getFeedShowStyle() {
        return feedShowStyle;
    }
    public void setFeedShowStyle(String feedShowStyle) {
        this.feedShowStyle = feedShowStyle;
    }
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getIntro() {
        return intro;
    }
    public void setIntro(String intro) {
        this.intro = intro;
    }
    public String getKpic() {
        return kpic;
    }
    public void setKpic(String kpic) {
        this.kpic = kpic;
    }
    public String getLink() {
        return link;
    }
    public void setLink(String link) {
        this.link = link;
    }
    public String getLong_title() {
        return long_title;
    }
    public void setLong_title(String long_title) {
        this.long_title = long_title;
    }
    public String getPic() {
        return pic;
    }
    public void setPic(String pic) {
        this.pic = pic;
    }
    public MyPics getPics() {
        return pics;
    }
    public void setPics(MyPics pics) {
        this.pics = pics;
    }
    public long getPubDate() {
        return pubDate;
    }
    public void setPubDate(long pubDate) {
        this.pubDate = pubDate;
    }
    public String getSource() {
        return source;
    }
    public void setSource(String source) {
        this.source = source;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    
}

Pics

package com.cp.vo;

import java.io.Serializable;

public class Pics implements Serializable {
    private String alt;
    private String kpic;
    private String pic;
    public String getAlt() {
        return alt;
    }
    public void setAlt(String alt) {
        this.alt = alt;
    }
    public String getKpic() {
        return kpic;
    }
    public void setKpic(String kpic) {
        this.kpic = kpic;
    }
    public String getPic() {
        return pic;
    }
    public void setPic(String pic) {
        this.pic = pic;
    }
    @Override
    public String toString() {
        return "Pics [alt=" + alt + ", kpic=" + kpic + ", pic=" + pic + "]";
    }
    
    
}