PullToRefresh的使用

主界面↓

 package com.wangzhen.pulltorefresh;

 import java.util.ArrayList;
 import java.util.List;

 import com.handmark.pulltorefresh.library.PullToRefreshBase;
 import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
 import com.handmark.pulltorefresh.library.PullToRefreshListView;
 import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
 import com.lidroid.xutils.ViewUtils;
 import com.lidroid.xutils.view.annotation.ContentView;
 import com.lidroid.xutils.view.annotation.ViewInject;
 import com.wangzhen.adapter.MessageAdapter;
 import com.wangzhen.bean.NewsBean;
 import com.wangzhen.listener.HttpDataListener;
 import com.wangzhen.tasks.LoadNewsTask;

 import android.support.v7.app.ActionBarActivity;
 import android.text.format.DateUtils;
 import android.widget.ListView;
 import android.content.Context;
 import android.os.Bundle;

 @ContentView(R.layout.activity_main)
 public class MainActivity extends ActionBarActivity {

     @ViewInject(R.id.ListView_PullToRefresh)
     private PullToRefreshListView ListView_PullToRefresh;

     Context mContext;
     MessageAdapter adapter;
     private HttpDataListener mDataListener;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         ViewUtils.inject(this);
         mContext = this;

         Setup();
         InitListener();

         List<NewsBean> list = new ArrayList<NewsBean>();
         for (int i = 0; i < 5; i++) {
             NewsBean bean = new NewsBean();
             bean.setNewsImageURL("");
             bean.setNewsTitle("标题" + (i + 1));
             bean.setNewsContent("内容" + (i + 1));
             list.add(bean);
         }
         adapter = new MessageAdapter(mContext, list);
         ListView_PullToRefresh.setAdapter(adapter);

         ListView_PullToRefresh
                 .setOnRefreshListener(new OnRefreshListener<ListView>() {

                     @Override
                     public void onRefresh(
                             PullToRefreshBase<ListView> refreshView) {
                         String time = DateUtils.formatDateTime(mContext,
                                 System.currentTimeMillis(),
                                 DateUtils.FORMAT_SHOW_TIME
                                         | DateUtils.FORMAT_SHOW_DATE
                                         | DateUtils.FORMAT_ABBREV_ALL);

                         // 下拉刷新
                         if (refreshView.isShownHeader()) {
                             // 设置刷新标签
                             ListView_PullToRefresh.getLoadingLayoutProxy()
                                     .setRefreshingLabel("正在刷新");
                             // 设置刷新标签
                             ListView_PullToRefresh.getLoadingLayoutProxy()
                                     .setPullLabel("下拉刷新");
                             // 设置刷新标签
                             ListView_PullToRefresh.getLoadingLayoutProxy()
                                     .setReleaseLabel("释放开始刷新");
                             // 设置上一次刷新的提示标签
                             refreshView.getLoadingLayoutProxy()
                                     .setLastUpdatedLabel("最后更新时间：" + time);
                         }
                         // 上拉加载
                         if (refreshView.isShownFooter()) {
                             // 设置刷新标签
                             ListView_PullToRefresh.getLoadingLayoutProxy()
                                     .setRefreshingLabel("正在加载");
                             // 设置刷新标签
                             ListView_PullToRefresh.getLoadingLayoutProxy()
                                     .setPullLabel("上拉加载更多");
                             // 设置刷新标签
                             ListView_PullToRefresh.getLoadingLayoutProxy()
                                     .setReleaseLabel("释放开始加载");
                             // 设置上一次刷新的提示标签
                             refreshView.getLoadingLayoutProxy()
                                     .setLastUpdatedLabel("最后加载时间：" + time);
                         }
                         new LoadNewsTask(ListView_PullToRefresh, mDataListener)
                                 .execute();
                     }
                 });
     }

     /**
      * 初始化监听器
      */
     private void InitListener() {
         mDataListener = new HttpDataListener() {

             @Override
             public void ParseResponse(List<NewsBean> list) {
                 if (list == null) {
                     return;
                 }
                 adapter.AddData(list);
                 adapter.notifyDataSetChanged();
             }
         };
     }

     /**
      * 对下拉刷新和上拉加载进行设置
      */
     private void Setup() {
         /**
          * PullToRefresh刷新模式
          * Both：上拉刷新和下拉刷新都支持
          * DIABLED：禁用上拉下拉刷新
          * PULL_FROM_START:仅支持下拉刷新
          * PULL_FROM_END:仅支持上拉加载
          * MANUAL_REFRESH_ONLY:只允许手动触发
          */
         ListView_PullToRefresh.setMode(Mode.BOTH);
     }
 }

HTTP接口↓

 package com.wangzhen.listener;

 import java.util.List;

 import com.wangzhen.bean.NewsBean;

 /**
  * HTTP请求接口
  * @author Administrator
  *
  */
 public interface HttpDataListener {

     /***
      * 解析服务器返回结果
      *
      * @param list
      */
     public abstract void ParseResponse(List<NewsBean> list);
 }

异步加载类↓

 package com.wangzhen.tasks;

 import java.util.ArrayList;
 import java.util.List;

 import com.handmark.pulltorefresh.library.PullToRefreshListView;
 import com.wangzhen.bean.NewsBean;
 import com.wangzhen.listener.HttpDataListener;

 import android.os.AsyncTask;

 /**
  * 异步加载新闻
  *
  * @author Administrator
  *
  */
 public class LoadNewsTask extends AsyncTask<String, Void, List<NewsBean>> {

     PullToRefreshListView mListView;
     HttpDataListener mListener;

     public LoadNewsTask(PullToRefreshListView listView,
             HttpDataListener listener) {
         mListView = listView;
         mListener = listener;
     }

     @Override
     protected void onPostExecute(List<NewsBean> result) {
         super.onPostExecute(result);
         mListView.onRefreshComplete();
         mListener.ParseResponse(result);
     }

     @Override
     protected List<NewsBean> doInBackground(String... params) {
         try {
             Thread.sleep(2000);
         } catch (InterruptedException e) {
             e.printStackTrace();
         }
         return GenerateData();
     }

     /**
      * 生成数据
      *
      * @return
      */
     private List<NewsBean> GenerateData() {
         List<NewsBean> list = new ArrayList<NewsBean>();
         for (int i = 0; i < 5; i++) {
             NewsBean bean = new NewsBean();
             bean.setNewsImageURL("");
             bean.setNewsTitle("添加标题" + (i + 1));
             bean.setNewsContent("添加内容" + (i + 1));
             list.add(bean);
         }
         return list;
     }

 }

消息适配器↓

 package com.wangzhen.adapter;

 import java.util.List;

 import com.wangzhen.bean.NewsBean;
 import com.wangzhen.pulltorefresh.R;

 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;

 /**
  * 新闻适配器
  *
  * @author Administrator
  *
  */
 public class MessageAdapter extends BaseAdapter {

     Context mContext;
     LayoutInflater mInflater;

     List<NewsBean> mData = null;

     public MessageAdapter(Context context, List<NewsBean> list) {
         mContext = context;
         mInflater = LayoutInflater.from(mContext);
         mData = list;
     }

     /**
      * 增加数据源
      *
      * @param data
      */
     public void AddData(List<NewsBean> list) {
         for (NewsBean bean : list) {
             this.mData.add(bean);
         }
     }

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

     @Override
     public NewsBean getItem(int position) {
         // TODO Auto-generated method stub
         return mData.get(position);
     }

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

     @Override
     public View getView(int position, View convertView, ViewGroup parent) {
         ViewHolder holder;
         if (convertView == null) {
             holder = new ViewHolder();
             convertView = mInflater.inflate(R.layout.item_layout, null);
             holder.mImageView_Icon = (ImageView) convertView
                     .findViewById(R.id.ImageView_Icon);
             holder.mTextView_Title = (TextView) convertView
                     .findViewById(R.id.TextView_Title);
             holder.mTextView_Content = (TextView) convertView
                     .findViewById(R.id.TextView_Content);
             convertView.setTag(holder);

         } else {
             holder = (ViewHolder) convertView.getTag();
         }

         holder.mImageView_Icon.setImageResource(R.drawable.ic_launcher);
         holder.mTextView_Title.setText(mData.get(position).getNewsTitle());
         holder.mTextView_Content.setText(mData.get(position).getNewsContent());

         return convertView;
     }

     class ViewHolder {
         ImageView mImageView_Icon;
         TextView mTextView_Title;
         TextView mTextView_Content;
     }

 }

实体类↓

 package com.wangzhen.bean;

 /**
  * 实体类
  *
  * @author Administrator
  *
  */
 public class NewsBean {

     private String NewsImageURL;
     private String NewsTitle;
     private String NewsContent;

     public String getNewsImageURL() {
         return NewsImageURL;
     }

     public void setNewsImageURL(String newsImageURL) {
         NewsImageURL = newsImageURL;
     }

     public String getNewsTitle() {
         return NewsTitle;
     }

     public void setNewsTitle(String newsTitle) {
         NewsTitle = newsTitle;
     }

     public String getNewsContent() {
         return NewsContent;
     }

     public void setNewsContent(String newsContent) {
         NewsContent = newsContent;
     }

 }

在PullToRefreshBase文件里要添加以下代码：

 // 判别头部是否展示出来，如果展示出来代表下拉使得头部展示。true为下拉
     public boolean isShownHeader() {
         return getHeaderLayout().isShown();
     }

     // 判别低部是否展示出来，如果展示出来代表上拉使得低部展示。true为上拉
     public boolean isShownFooter() {
         return getFooterLayout().isShown();
     }