Android官方提供的下拉刷新控件——SwipeRefreshLayout

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.administrator.mydemo.PullActivity">
    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/mpull"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        >
        <ListView
            android:id="@+id/mlist"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
        </ListView>

    </android.support.v4.widget.SwipeRefreshLayout>


</RelativeLayout>

import android.os.Handler;
import android.os.Message;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class PullActivity extends AppCompatActivity {
    private SwipeRefreshLayout swipeRefreshLayout;
    private ListView listView;
    private List list;
    private  SimpleAdapter simpleAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_pull);
        initView();
        setList();
    }

    private void initView(){
        swipeRefreshLayout= (SwipeRefreshLayout) findViewById(R.id.mpull);
        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                //
                new Handler().postDelayed(new Thread(new Runnable() {
                    @Override
                    public void run() {
                        swipeRefreshLayout.setRefreshing(false);

                        //刷新之后发送message
                        Message msg=new Message();
                        msg.what=1;
                        mhandle.sendMessage(msg);

                    }
                }),3000);
            }
        });
        listView= (ListView) findViewById(R.id.mlist);
    }
    private Handler mhandle=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if (msg.what==1){
                Toast.makeText(getApplicationContext(),"刷新成功！",Toast.LENGTH_SHORT).show();
                //下拉之后需要加载的数据
                List mlist=new ArrayList();
                for (int i=0;i<20;i++){
                    Map map=new HashMap();
                    map.put("img",R.drawable.img);
                    map.put("text","下拉数据"+i);
                    mlist.add(map);
                }
                list.addAll(mlist);
                simpleAdapter.notifyDataSetChanged();
            }
        }
    };
    private void setList(){
        list=new ArrayList();
        for (int i=0;i<20;i++){
            Map map=new HashMap();
            map.put("img",R.drawable.img);
            map.put("text","新数据"+i);
            list.add(map);
        }
        simpleAdapter=new SimpleAdapter(this,list,R.layout.list_item,new String[]{"img","text"},new int[]{R.id.my_img,R.id.my_item});
        listView.setAdapter(simpleAdapter);
    }
}