android listview分页

layout中的 list_item.xml源码：

 

01<spanstyle="font-size:13px;"><?xmlversion="1.0"encoding="utf-8"?>

02<LinearLayout

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

04  android:layout_width="fill_parent"

05  android:layout_height="fill_parent"

06  android:orientation="vertical">

07  <TextView

08     android:id="@+id/newstitle"

09     android:layout_width="fill_parent"

10     android:layout_height="wrap_content"/>

11  <TextView

12     android:id="@+id/newscontent"

13     android:layout_width="fill_parent"

14     android:layout_height="wrap_content"/>

15</LinearLayout></span>

layout中loadmore.xml源码

01<?xmlversion="1.0"encoding="utf-8"?>

02<LinearLayout

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

04  android:layout_width="fill_parent"

05  android:layout_height="fill_parent">

06  <Button

07      android:id="@+id/loadMoreButton"

08      android:layout_width="fill_parent"

09      android:layout_height="wrap_content"

10      android:text="查看更多..."/>

11</LinearLayout>

layout中main.xml源码：

 

01<?xmlversion="1.0"encoding="utf-8"?>

02<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"

03    android:orientation="vertical"

04    android:layout_width="fill_parent"

05    android:layout_height="fill_parent">

06    <ListView

07       android:id="@+id/lvNews"

08       android:layout_width="fill_parent"

09       android:layout_height="wrap_content"/>

10</LinearLayou

包 com.andyidea.bean中News.java类源码：

 

01package com.andyidea.bean;

02 

03/**

04* 新闻实体类

05* @author Andy.Chen

06* @mail [e-mail]

07*

08*/

09public class News {

10   

11    privateString title;    //标题

12    privateString content;  //内容

13   

14    publicString getTitle() {

15        returntitle;

16    }

17    publicvoid setTitle(String title) {

18        this.title = title;

19    }

20    publicString getContent() {

21        returncontent;

22    }

23    publicvoid setContent(String content) {

24        this.content = content;

25    }

26 

27}

包com.andyidea.listview中paginationListViewActivity.java类源码：

 

001package com.andyidea.listview;

002 

003import java.util.ArrayList;

004import java.util.List;

005 

006import com.andyidea.bean.News;

007 

008import android.app.Activity;

009import android.os.Bundle;

010import android.os.Handler;

011import android.util.Log;

012import android.view.View;

013import android.view.ViewGroup;

014import android.widget.AbsListView;

015import android.widget.AbsListView.OnScrollListener;

016import android.widget.BaseAdapter;

017import android.widget.Button;

018import android.widget.ListView;

019import android.widget.TextView;

020import android.widget.Toast;

021 

022public class PaginationListViewActivity extendsActivity implementsOnScrollListener {

023   

024    privateListView listView; 

025    privateint visibleLastIndex =0;   //最后的可视项索引 

026    privateint visibleItemCount;      // 当前窗口可见项总数 

027    privateint datasize = 38;          //模拟数据集的条数

028    privatePaginationAdapter adapter; 

029    privateView loadMoreView; 

030    privateButton loadMoreButton; 

031    privateHandler handler = newHandler();

032   

033    /** Called when the activity is first created. */

034    @Override

035    publicvoid onCreate(Bundle savedInstanceState) {

036        super.onCreate(savedInstanceState);

037        setContentView(R.layout.main);

038       

039        loadMoreView = getLayoutInflater().inflate(R.layout.loadmore,null);

040        loadMoreButton = (Button)loadMoreView.findViewById(R.id.loadMoreButton);

041        loadMoreButton.setOnClickListener(newView.OnClickListener() {

042           

043            @Override

044            publicvoid onClick(View v) {

045                loadMoreButton.setText("正在加载中...");  //设置按钮文字

046                handler.postDelayed(newRunnable() {

047                   

048                    @Override

049                    publicvoid run() {

050                        loadMoreData();

051                        adapter.notifyDataSetChanged();

052                        loadMoreButton.setText("查看更多..."); //恢复按钮文字

053                    }

054                },2000);

055               

056            }

057        });

058       

059        listView = (ListView)findViewById(R.id.lvNews);

060        listView.addFooterView(loadMoreView);   //设置列表底部视图

061        initializeAdapter();

062        listView.setAdapter(adapter);

063        listView.setOnScrollListener(this);

064    }

065   

066    @Override

067    publicvoid onScrollStateChanged(AbsListView view,int scrollState) {

068        intitemsLastIndex = adapter.getCount()-1; //数据集最后一项的索引 

069        intlastIndex = itemsLastIndex + 1;

070        if(scrollState == OnScrollListener.SCROLL_STATE_IDLE

071                && visibleLastIndex == lastIndex) {

072            // 如果是自动加载,可以在这里放置异步加载数据的代码

073        }

074    }

075 

076 

077    @Override

078    publicvoid onScroll(AbsListView view,int firstVisibleItem,

079            intvisibleItemCount, inttotalItemCount) {

080        this.visibleItemCount = visibleItemCount;

081        visibleLastIndex = firstVisibleItem + visibleItemCount -1;

082       

083        Log.e("========================= ","========================");

084        Log.e("firstVisibleItem = ",firstVisibleItem+"");

085        Log.e("visibleItemCount = ",visibleItemCount+"");

086        Log.e("totalItemCount = ",totalItemCount+"");

087        Log.e("========================= ","========================");

088       

089        //如果所有的记录选项等于数据集的条数，则移除列表底部视图

090        if(totalItemCount == datasize+1){

091            listView.removeFooterView(loadMoreView);

092            Toast.makeText(this,"数据全部加载完!", Toast.LENGTH_LONG).show();

093        }

094    }

095   

096    /**

097     * 初始化ListView的适配器

098     */

099    privatevoid initializeAdapter(){

100        List<News> news =new ArrayList<News>();

101        for(inti=1;i<=10;i++){

102            News items =new News();

103            items.setTitle("Title"+i);

104            items.setContent("This is News Content"+i);

105            news.add(items);

106        }

107        adapter =new PaginationAdapter(news);

108    }

109   

110    /**

111     * 加载更多数据

112     */

113    privatevoid loadMoreData(){

114        intcount = adapter.getCount();

115       

116        if(count+10<= datasize){

117            for(inti=count+1; i<=count+10; i++){

118                News item =new News();

119                item.setTitle("Title"+i);

120                item.setContent("This is News Content"+i);

121                adapter.addNewsItem(item);

122            }

123        }else{

124            for(inti=count+1; i<=datasize; i++){

125                News item =new News();

126                item.setTitle("Title"+i);

127                item.setContent("This is News Content"+i);

128                adapter.addNewsItem(item);

129            }

130        }

131       

132    }

133   

134   

135    classPaginationAdapter extendsBaseAdapter{

136       

137        List<News> newsItems;

138       

139        publicPaginationAdapter(List<News> newsitems){

140            this.newsItems = newsitems;

141        }

142 

143        @Override

144        publicint getCount() {

145            returnnewsItems.size();

146        }

147 

148        @Override

149        publicObject getItem(intposition) {

150            returnnewsItems.get(position);

151        }

152 

153        @Override

154        publiclong getItemId(intposition) {

155            returnposition;

156        }

157 

158        @Override

159        publicView getView(intposition, View view, ViewGroup parent) {

160            if(view ==null){

161                view = getLayoutInflater().inflate(R.layout.list_item,null);

162            }

163           

164            //新闻标题

165            TextView tvTitle = (TextView)view.findViewById(R.id.newstitle);

166            tvTitle.setText(newsItems.get(position).getTitle());

167            //新闻内容

168            TextView tvContent = (TextView)view.findViewById(R.id.newscontent);

169            tvContent.setText(newsItems.get(position).getContent());

170           

171            returnview;

172        }

173       

174        /**

175         * 添加数据列表项

176         * @param newsitem

177         */

178        publicvoid addNewsItem(News newsitem){

179            newsItems.add(newsitem);

180        }

181       

182    }

183 

184}