xml中引用PullToRefreshListView

在xml中引用

<com.handmark.pulltorefresh.library.PullToRefreshListView          xmlns:ptr="http://schemas.android.com/apk/res-auto"          android:id="@+id/pull_refresh_list"          android:layout_width="fill_parent"          android:layout_height="fill_parent"          android:cacheColorHint="#00000000"          android:fadingEdge="none"          ptr:ptrDrawable="@drawable/default_ptr_rotate"         android:fastScrollEnabled="false"          android:footerDividersEnabled="false"          ptr:ptrMode="both"        android:headerDividersEnabled="false"          android:smoothScrollbar="true" >      </com.handmark.pulltorefresh.library.PullToRefreshListView>

代码中，MainActivity

package com.bw.yangzhengzheng20160517;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.text.format.DateUtils;import com.bw.asynctask.MyAsyncTask;import com.handmark.pulltorefresh.library.PullToRefreshBase;import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener2;import com.handmark.pulltorefresh.library.PullToRefreshListView;public class MainActivity extends Activity {    private PullToRefreshListView pull_refresh_list;    private Handler handler = new Handler(){        public void handleMessage(android.os.Message msg) {        };    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        pull_refresh_list = (PullToRefreshListView) findViewById(R.id.pull_refresh_list);        pull_refresh_list.setOnRefreshListener(new OnRefreshListener2() {            @Override            public void onPullDownToRefresh(PullToRefreshBase refreshView) {                handler.postDelayed(new Runnable() {                    public void run() {                        MyAsyncTask task2 = new MyAsyncTask(MainActivity.this,pull_refresh_list);                        task2.execute("http://apis.juhe.cn/goodbook/query?key=9d6ef8c31647a206e05fcaff70527182&catalog_id=242&pn=20&rn=20&dtype=xml");                        onLoad();                        pull_refresh_list.onRefreshComplete();                    }                }, 2000);            }            @Override            public void onPullUpToRefresh(PullToRefreshBase refreshView) {                handler.postDelayed(new Runnable() {                    public void run() {                        MyAsyncTask task3 = new MyAsyncTask(MainActivity.this,pull_refresh_list);                        task3.execute("http://apis.juhe.cn/goodbook/query?key=9d6ef8c31647a206e05fcaff70527182&catalog_id=242&pn=30&rn=20&dtype=xml");                        onLoad();                        pull_refresh_list.onRefreshComplete();                    }                }, 2000);            }        });    }    public void requestData() {        MyAsyncTask task = new MyAsyncTask(this,pull_refresh_list);        task.execute("http://apis.juhe.cn/goodbook/query?key=9d6ef8c31647a206e05fcaff70527182&catalog_id=242&pn=0&rn=20&dtype=xml");    }    /*     * 当前时间     */    private void onLoad() {        String label = DateUtils.formatDateTime(getApplicationContext(),                System.currentTimeMillis(), DateUtils.FORMAT_SHOW_TIME                        | DateUtils.FORMAT_SHOW_DATE                        | DateUtils.FORMAT_ABBREV_ALL);        // Update the LastUpdatedLabel        pull_refresh_list.getLoadingLayoutProxy().setLastUpdatedLabel(label);    }}

MyAsyncTask中

package com.bw.asynctask;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.ProtocolException;import java.net.URL;import java.util.ArrayList;import java.util.List;import org.xmlpull.v1.XmlPullParser;import org.xmlpull.v1.XmlPullParserException;import android.R.integer;import android.content.Context;import android.os.AsyncTask;import android.util.Xml;import com.bw.adapter.MyAdapter;import com.bw.bean.Books;import com.handmark.pulltorefresh.library.PullToRefreshListView;public class MyAsyncTask extends AsyncTask<String, integer, List<Books>> {    private Context context;    private PullToRefreshListView pull_refresh_list;    private List<Books> list;    public MyAsyncTask(Context context, PullToRefreshListView pull_refresh_list) {        super();        this.context = context;        this.pull_refresh_list = pull_refresh_list;    }    @Override    protected List<Books> doInBackground(String... params) {            try {                //获取URL                URL url = new URL(params[0]);                //获取HttpURLConnection                HttpURLConnection conn = (HttpURLConnection) url.openConnection();                //设置请求超时时间                conn.setConnectTimeout(10000);                conn.setDoOutput(true);                conn.setDoInput(true);                conn.setUseCaches(false);                conn.setRequestMethod("GET");                conn.connect();                if(conn.getResponseCode() == 200){                    InputStream is = conn.getInputStream();                    pullParserXML(is);                    return list;                }            } catch (MalformedURLException e) {                e.printStackTrace();            } catch (ProtocolException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            }        return null;    }    @Override    protected void onPostExecute(List<Books> result) {        super.onPostExecute(result);        pull_refresh_list.setAdapter(new MyAdapter(context,list));    }    private void pullParserXML(InputStream is) {        try {            XmlPullParser parser = Xml.newPullParser();            parser.setInput(is, "utf-8");            int event = parser.getEventType();            boolean flag = true;            String tagname = "";            Books book = null;            while(flag){                switch (event) {                case XmlPullParser.START_DOCUMENT:                    list = new ArrayList<Books>();                    break;                case XmlPullParser.START_TAG:                    tagname = parser.getName();                    if(tagname.equals("item")){                        book = new Books();                    }                      break;                case XmlPullParser.TEXT:                    if(tagname.equals("title")){                        book.setTitle(parser.getText());                    }else if(tagname.equals("sub1")){                        book.setSub1(parser.getText());                    }else if(tagname.equals("img")){                        book.setImg(parser.getText());                    }else if(tagname.equals("reading")){                        book.setReading(parser.getText());                    }else if(tagname.equals("bytime")){                        book.setBytime(parser.getText());                    }                    break;                case XmlPullParser.END_TAG:                    tagname = parser.getName();                    if(tagname.equals("item")){                        list.add(book);                    }                    tagname = "";                    break;                case XmlPullParser.END_DOCUMENT:                    flag = false;                    break;                }                event = parser.next();            }        } catch (XmlPullParserException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }}