Android使用PullToRefresh实现上拉加载和下拉刷新效果的代码

apply plugin: 'com.android.library'android {compileSdkVersion 23buildToolsVersion "24.0.0"defaultConfig {minSdkVersion 18targetSdkVersion 23}buildTypes {release {minifyEnabled falseproguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'}}}

<?xml version="1.0" encoding="utf-8"?><RelativeLayout  xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  xmlns:app="http://schemas.android.com/apk/res-auto"  android:layout_width="match_parent"  android:layout_height="match_parent"  tools:context="com.example.nanchen.pulltorefreshdemo.MainActivity">  <com.handmark.pulltorefresh.library.PullToRefreshListView    android:layout_width="match_parent"    android:layout_height="match_parent"    android:id="@+id/main_pull_refresh_lv"    app:ptrAnimationStyle="flip"    app:ptrHeaderBackground="@android:color/transparent"    app:ptrHeaderTextColor="#919191"/></RelativeLayout>

package com.example.nanchen.pulltorefreshdemo;/** * Created by 南尘 on 16-7-20. */public class Music {  private String title;  private String singer;  public Music() {  }  public Music(String title, String singer) {    this.title = title;    this.singer = singer;  }  public String getTitle() {    return title;  }  public void setTitle(String title) {    this.title = title;  }  public String getSinger() {    return singer;  }  public void setSinger(String singer) {    this.singer = singer;  }}

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:layout_marginLeft="20dp"android:layout_marginRight="20dp"><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/item_title"android:text="歌曲1"android:textSize="20sp"android:layout_alignParentLeft="true"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/item_singer"android:textSize="20sp"android:text="歌手1"android:layout_alignParentRight="true"/></RelativeLayout>

package com.example.nanchen.pulltorefreshdemo;import android.content.Context;import android.os.AsyncTask;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ListView;import android.widget.TextView;import com.handmark.pulltorefresh.library.ILoadingLayout;import com.handmark.pulltorefresh.library.PullToRefreshBase;import com.handmark.pulltorefresh.library.PullToRefreshListView;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {  private PullToRefreshListView refresh_lv;  private List<Music> list;  private DataAdapter adapter;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    refresh_lv = (PullToRefreshListView) findViewById(R.id.main_pull_refresh_lv);    list = new ArrayList<>();    //设置可上拉刷新和下拉刷新    refresh_lv.setMode(PullToRefreshBase.Mode.BOTH);    //设置刷新时显示的文本    ILoadingLayout startLayout = refresh_lv.getLoadingLayoutProxy(true,false);    startLayout.setPullLabel("正在下拉刷新...");    startLayout.setRefreshingLabel("正在玩命加载中...");    startLayout.setReleaseLabel("放开以刷新");    ILoadingLayout endLayout = refresh_lv.getLoadingLayoutProxy(false,true);    endLayout.setPullLabel("正在上拉刷新...");    endLayout.setRefreshingLabel("正在玩命加载中...");    endLayout.setReleaseLabel("放开以刷新");    refresh_lv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {      @Override      public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {        new LoadDataAsyncTask(MainActivity.this).execute();      }      @Override      public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {        new LoadDataAsyncTask(MainActivity.this).execute();      }    });    loadData();    adapter = new DataAdapter(this,list);    refresh_lv.setAdapter(adapter);  }  private int count = 1;  private void loadData(){    for (int i = 0; i < 10; i++) {      list.add(new Music("歌曲"+count,"歌手"+count));      count++;    }  }  /**   * 异步下载任务   */  private static class LoadDataAsyncTask extends AsyncTask<Void,Void,String>{    private MainActivity mainActivity;    public LoadDataAsyncTask(MainActivity mainActivity) {      this.mainActivity = mainActivity;    }    @Override    protected String doInBackground(Void... params) {      try {        Thread.sleep(2000);        mainActivity.loadData();        return "seccess";      } catch (InterruptedException e) {        e.printStackTrace();      }      return null;    }    /**     * 完成时的方法     */    @Override    protected void onPostExecute(String s) {      super.onPostExecute(s);      if (s.equals("seccess")){        mainActivity.adapter.notifyDataSetChanged();        mainActivity.refresh_lv.onRefreshComplete();//刷新完成      }    }  }  /**   * 自定义适配器   */  private static class DataAdapter extends BaseAdapter{    private Context context;    private List<Music> list;    public DataAdapter(Context context, List<Music> list) {      this.context = context;      this.list = list;    }    @Override    public int getCount() {      if (list != null){        return list.size();      }      return 0;    }    @Override    public Object getItem(int position) {      return list.get(position);    }    @Override    public long getItemId(int position) {      return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {      ViewHolder vh;      if (convertView == null){        convertView = LayoutInflater.from(context).inflate(R.layout.list_item,parent,false);        vh = new ViewHolder();        vh.tv_title = (TextView) convertView.findViewById(R.id.item_title);        vh.tv_singer = (TextView) convertView.findViewById(R.id.item_singer);        convertView.setTag(vh);      }else{        vh = (ViewHolder) convertView.getTag();      }      Music music = (Music) getItem(position);      vh.tv_title.setText(music.getTitle());      vh.tv_singer.setText(music.getSinger());      return convertView;    }    class ViewHolder{      TextView tv_title;      TextView tv_singer;    }  }}