首先要知道刷新有三个状态，

1是下拉中

2是松开刷新

3是正在刷新

还有一个非常重要的是回调接口，这个接口是正在刷新的时候外界需要做的事。

然后外界再把状态重置。

回调接口需要三个属性，

    private OnRefLisner listener;

    public void setOnRefLisner(OnRefLisner listener){

        this.listener = listener;

    }

    //回调接口

    public interface OnRefLisner{

        void setPullRfe();

    }

package com.example.listviewf5;import java.text.SimpleDateFormat;import android.content.Context;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.view.animation.RotateAnimation;import android.widget.ImageView;import android.widget.ListView;import android.widget.ProgressBar;import android.widget.TextView;public class MyListView extends ListView {    private View v;    private int headHeight;// 头部的高度    private int downY;// 按下时候Y坐标    private final int PULL_REF = 0;// 下拉    private final int REL_REF = 1;// 松开刷新    private final int REFING = 2;// 刷新中    private int currentState = PULL_REF;    private TextView tv;    private TextView tvtiem;    private ImageView img;    private ProgressBar pb;    //旋转动画    private RotateAnimation upAnimation,downAnimation;    public MyListView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        // TODO Auto-generated constructor stub        initView(context);    }    public MyListView(Context context, AttributeSet attrs) {        super(context, attrs);        // TODO Auto-generated constructor stub        initView(context);    }    public MyListView(Context context) {        super(context);        // TODO Auto-generated constructor stub        initView(context);    }    /**     * 加载顶部布局文件     *      * @param context     */    private void initView(Context context) {        // LayoutInflater in =LayoutInflater.from(context);        // v = in.inflate(R.layout.head,null);        v = View.inflate(context, R.layout.head, null);        this.addHeaderView(v);        v.measure(0, 0);// 通知系统测量宽高        headHeight = v.getMeasuredHeight();// 得到测量后的高度        v.setPadding(0, -headHeight, 0, 0);// 进行隐藏head,就是把paddingtop设置成负高度        tv = (TextView) v.findViewById(R.id.head_tv);        tvtiem = (TextView) v.findViewById(R.id.head_tvtime);        img = (ImageView) v.findViewById(R.id.head_img);        pb = (ProgressBar) v.findViewById(R.id.pb);        initHeadRotateAnimation();            }    private void initHeadRotateAnimation() {        upAnimation = new RotateAnimation(0, -180,                 RotateAnimation.RELATIVE_TO_SELF, 0.5f,                RotateAnimation.RELATIVE_TO_SELF, 0.5f);        upAnimation.setDuration(300);        upAnimation.setFillAfter(true);        downAnimation = new RotateAnimation(-180, -360,                 RotateAnimation.RELATIVE_TO_SELF, 0.5f,                RotateAnimation.RELATIVE_TO_SELF, 0.5f);        downAnimation.setDuration(300);        downAnimation.setFillAfter(true);            }    @Override    public boolean onTouchEvent(MotionEvent ev) {        switch (ev.getAction()) {        case MotionEvent.ACTION_DOWN:            downY = (int) ev.getY();            break;        case MotionEvent.ACTION_MOVE:            //如果是正在刷新状态滑动没有            if(currentState==REFING){                break;            }                            int deltaY = (int) (ev.getY() - downY);// 得到移动的距离            int currentHeight = -headHeight + deltaY;            // 判断当前的距离是不是大于headHeight 并且显示的是第一个位置            if (currentHeight > -headHeight && getFirstVisiblePosition() == 0) {                v.setPadding(0, currentHeight, 0, 0);// 展现头部                if (currentHeight >= 0 && currentState == PULL_REF) {                    currentState = REL_REF;                    refHeadView();                } else if (currentHeight < 0 && currentState == REL_REF) {                    currentState = PULL_REF;                    refHeadView();                }                return true;// 拦截事件不让listview处理            }            break;        case MotionEvent.ACTION_UP:            //判断当前是不是要刷新状态            if(currentState==PULL_REF){                v.setPadding(0, -headHeight, 0, 0);            }else if(currentState==REL_REF){                currentState=REFING;                v.setPadding(0,0, 0, 0);                refHeadView();                if(listener!=null){                    listener.setPullRfe();                }            }            break;        }        return super.onTouchEvent(ev);    }    private void refHeadView() {        switch (currentState) {        case PULL_REF:            tv.setText("下拉刷新");            img.startAnimation(downAnimation);            break;        case REL_REF:            tv.setText("松开刷新");            img.startAnimation(upAnimation);            break;        case REFING:            tv.setText("正在刷新……");            img.setVisibility(View.GONE);            img.clearAnimation();            pb.setVisibility(View.VISIBLE);            break;        default:            break;        }    }    //刷新完成要把控件和状态重置    public void completeRef(){        v.setPadding(0, -headHeight, 0, 0);// 展现头部        currentState=PULL_REF;        tv.setText("下拉刷新");        img.setVisibility(View.VISIBLE);        pb.setVisibility(View.GONE);        SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");        String date = sDateFormat.format(new java.util.Date());        tvtiem.setText("最后刷新:"+date);            }    private OnRefLisner listener;    public void setOnRefLisner(OnRefLisner listener){        this.listener = listener;    }    //回调接口    public interface OnRefLisner{        void setPullRfe();     }}

package com.example.listviewf5;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import com.example.listviewf5.MyListView.OnRefLisner;import android.os.Bundle;import android.os.Handler;import android.app.Activity;import android.view.Menu;import android.widget.ListView;import android.widget.SimpleAdapter;import android.widget.Toast;public class MainActivity extends Activity {    private MyListView lv;    private List