使用PullToRefreshActivity实现android下拉刷新

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效果图

XML文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical" android:layout_width="match_parent"    android:layout_height="match_parent">    <com.handmark.pulltorefresh.library.PullToRefreshListView        android:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/ptrlv_refresh"        ></com.handmark.pulltorefresh.library.PullToRefreshListView></LinearLayout>

java代码

package com.example.g160628_08;import android.os.AsyncTask;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.Toast;import com.handmark.pulltorefresh.library.PullToRefreshBase;import com.handmark.pulltorefresh.library.PullToRefreshListView;import java.util.ArrayList;import java.util.List;/** * @author Zking-Snail * @time 2017/6/9 16:35 * @Version ${REV} */public class PullToRefreshActivity extends AppCompatActivity {    private PullToRefreshListView ptrlv_refresh;    private List<String> list=new ArrayList<>();    private ArrayAdapter adapter;    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_pulltorefresh);        ptrlv_refresh = (PullToRefreshListView) findViewById(R.id.ptrlv_refresh);        for (int i = 0; i <10 ; i++) {            list.add("静静爱明明和雷雷"+i+"次");        }        adapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1,list);        ptrlv_refresh.setAdapter(adapter);        //给ListView设置下拉刷新的监听        ptrlv_refresh.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {            @Override            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {                new MyTask().execute();            }            @Override            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {            }        });    }    class MyTask extends AsyncTask{        //在后台 获取数据        //内部有线程机制        @Override        protected Object doInBackground(Object[] objects) {            for (int i = 0; i <3 ; i++) {                list.add(0,"明明和雷雷也爱静静"+i+"次");            }            try {                Thread.sleep(1000);            } catch (InterruptedException e) {                e.printStackTrace();            }            return null;        }        //更新UI        @Override        protected void onPostExecute(Object o) {            super.onPostExecute(o);            ptrlv_refresh.onRefreshComplete();            //通知适配器数据 发生改变            adapter.notifyDataSetChanged();        }    }}

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