Android学习教程之下拉刷新实现代码（11）

package siso.refreshablev;

import android.app.activity;
import android.content.intent;
import android.support.v7.app.appcompatactivity;
import android.os.bundle;
import android.util.log;
import android.view.layoutinflater;
import android.view.view;
import android.widget.textview;

import refreshableview.refreshableview;
import refreshableview.refreshablehelper.refreshablehelper;

public class mainactivity extends activity implements view.onclicklistener {
 private static final string tag = mainactivity.class.getsimplename();

 private refreshableview refreshableview;

 /**
 * called when the activity is first created.
 */
 @override
 public void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.main);
 findviewbyid(r.id.main_tv).setonclicklistener(this);
 refreshableview = (refreshableview) findviewbyid(r.id.main_refresh_view);
 refreshableview.setrefreshablehelper(new refreshablehelper() {

  @override
  public view oninitrefreshheaderview() {
  return layoutinflater.from(mainactivity.this).inflate(r.layout.refresh_head, null);
  }

  @override
  public boolean oninitrefreshheight(int originrefreshheight) {
  refreshableview.setrefreshnormalheight(refreshableview.getoriginrefreshheight() / 3);
  refreshableview.setrefreshingheight(refreshableview.getoriginrefreshheight());
  refreshableview.setrefresharrivedstateheight(refreshableview.getoriginrefreshheight());
  return false;
  }

  @override
  public void onrefreshstatechanged(view refreshview, int refreshstate) {
  textview tv = (textview) refreshview.findviewbyid(r.id.refresh_head_tv);
  switch (refreshstate) {
   case refreshableview.state_refresh_normal:
   tv.settext("正常状态");
   break;
   case refreshableview.state_refresh_not_arrived:
   tv.settext("往下拉可以刷新");
   break;
   case refreshableview.state_refresh_arrived:
   tv.settext("放手可以刷新");
   break;
   case refreshableview.state_refreshing:
   tv.settext("正在刷新");
   new thread(
    new runnable() {
     @override
     public void run() {
     try {
      thread.sleep(1000l);
      runonuithread(new runnable() {
      @override
      public void run() {
       refreshableview.oncompleterefresh();
      }
      });
     } catch (interruptedexception e) {
      log.e(tag, "_", e);
     }
     }
    }
   ).start();
   break;

  }
  }
 });
 }

 @override
 public void onclick(view v) {
 switch (v.getid()) {
  case r.id.main_tv:
  log.d(tag, "content clicked");
  startactivity(new intent(this, refreshablelistactivity.class));
  break;
 }
 }
}

package siso.refreshablev;

import android.app.activity;
import android.os.bundle;
import android.util.log;
import android.view.layoutinflater;
import android.view.view;
import android.widget.arrayadapter;
import android.widget.textview;


import java.util.arraylist;
import java.util.list;

import refreshableview.refreshablelistview;
import refreshableview.refreshableview;
import refreshableview.refreshablehelper.refreshablehelper;


public class refreshablelistactivity extends activity {
 private static final string tag = refreshablelistactivity.class.getsimplename();
 refreshablelistview lv;

 @override
 protected void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.refreshable_list);
 lv = (refreshablelistview) findviewbyid(r.id.refreshable_lv);
 lv.setrefreshablehelper(new refreshablehelper() {

  @override
  public view oninitrefreshheaderview() {
  return layoutinflater.from(refreshablelistactivity.this).inflate(r.layout.refresh_head, null);
  }

  @override
  public boolean oninitrefreshheight(int originrefreshheight) {
  lv.setrefreshnormalheight(lv.getoriginrefreshheight() / 3);
  lv.setrefreshingheight(lv.getoriginrefreshheight());
  lv.setrefresharrivedstateheight(lv.getoriginrefreshheight());
  return false;
  }

  @override
  public void onrefreshstatechanged(view refreshview, int refreshstate) {
  textview tv = (textview) refreshview.findviewbyid(r.id.refresh_head_tv);
  switch (refreshstate) {
   case refreshableview.state_refresh_normal:
   tv.settext("正常状态");
   break;
   case refreshableview.state_refresh_not_arrived:
   tv.settext("往下拉可以刷新");
   break;
   case refreshableview.state_refresh_arrived:
   tv.settext("放手可以刷新");
   break;
   case refreshableview.state_refreshing:
   tv.settext("正在刷新");
   new thread(
    new runnable() {
     @override
     public void run() {
     try {
      thread.sleep(1000l);
      runonuithread(new runnable() {
      @override
      public void run() {
       lv.oncompleterefresh();
      }
      });
     } catch (interruptedexception e) {
      log.e(tag, "_", e);
     }
     }
    }
   ).start();
   break;

  }
  }
 });

 list<string> data = new arraylist<string>();
 for (int i = 0; i < 30; i++) {
  data.add("item_" + i);
 }
 arrayadapter adapter = new arrayadapter<string>(this, android.r.layout.simple_list_item_1, data);
 lv.setadapter(adapter);
 adapter.notifydatasetchanged();

 }


}

package refreshableview;

import android.content.context;
import android.util.attributeset;
import android.util.log;
import android.view.motionevent;
import android.view.viewparent;
import android.widget.scrollview;


public class nestscrollview extends scrollview {
 private static final string tag = nestscrollview.class.getsimplename();

 public nestscrollview(context context) {
 super(context);
 }

 public nestscrollview(context context, attributeset attrs) {
 super(context, attrs);
 }

 public nestscrollview(context context, attributeset attrs, int defstyle) {
 super(context, attrs, defstyle);
 }

 @override
 public boolean dispatchtouchevent(motionevent ev) {
 log.d(tag, "___[dispatchtouchevent]ev action: " + ev.getaction());
 return super.dispatchtouchevent(ev);
 }

 @override
 public boolean onintercepttouchevent(motionevent ev) {
 super.onintercepttouchevent(ev);
 log.d(tag, "___[onintercepttouchevent]ev action: " + ev.getaction());
 if (motionevent.action_move == ev.getaction()) {
  return true;
 }
 return false;
 }

 float lastdowny;

 @override
 public boolean ontouchevent(motionevent event) {
 super.ontouchevent(event);
 switch (event.getaction()) {
  case motionevent.action_down:
  lastdowny = event.gety();
  parentrequestdisallowintercepttouchevent(true); // 保证事件可往下传递
  log.d(tag, "___down");
  return true;
//  break;
  case motionevent.action_move:
  log.d(tag, "___move, this.getscrolly(): " + this.getscrolly());
  boolean istop = event.gety() - lastdowny > 0 && this.getscrolly() == 0;
  if (istop) { // 允许父控件拦截，即不允许父控件拦截设为false
   parentrequestdisallowintercepttouchevent(false);
   return false;
  } else { // 不允许父控件拦截，即不允许父控件拦截设为true
   parentrequestdisallowintercepttouchevent(true);
   return true;
  }
//  break;
  case motionevent.action_up:
  log.d(tag, "___up, this.getscrolly(): " + this.getscrolly());
  parentrequestdisallowintercepttouchevent(true); // 保证事件可往下传递
  break;
  case motionevent.action_cancel:
  log.d(tag, "___cancel");
  break;
 }
 return false;
 }

 /**
 * 是否允许父控件拦截事件
 * @param disallowintercept
 */
 private void parentrequestdisallowintercepttouchevent(boolean disallowintercept) {
 viewparent vp = getparent();
 if (null == vp) {
  return;
 }
 vp.requestdisallowintercepttouchevent(disallowintercept);
 }

}

package refreshableview;

import android.animation.animator;
import android.animation.animatorlisteneradapter;
import android.animation.valueanimator;
import android.content.context;
import android.util.attributeset;
import android.util.log;
import android.view.motionevent;
import android.view.view;
import android.view.viewgroup;
import android.view.animation.linearinterpolator;
import android.widget.listadapter;
import android.widget.listview;

import refreshableview.refreshablehelper.refreshablehelper;


public class refreshablelistview extends listview {
 private static final string tag = refreshablelistview.class.getsimplename();

 public refreshablelistview(context context) {
 super(context);
 init(context);
 }

 public refreshablelistview(context context, attributeset attrs) {
 super(context, attrs);
 init(context);
 }

 public refreshablelistview(context context, attributeset attrs, int defstyle) {
 super(context, attrs, defstyle);
 init(context);
 }

 /**
 * 刷新状态
 */
 public static final int state_refresh_normal = 0x21;
 public static final int state_refresh_not_arrived = 0x22;
 public static final int state_refresh_arrived = 0x23;
 public static final int state_refreshing = 0x24;
 private int refreshstate;
 // 刷新状态监听
 private refreshablehelper refreshablehelper;
 /**
 * 刷新的view
 */
 private view refreshheaderview;
 /**
 * 刷新的view的真实高度
 */
 private int originrefreshheight;
 /**
 * 有效下拉刷新需要达到的高度
 */
 private int refresharrivedstateheight;
 /**
 * 刷新时显示的高度
 */
 private int refreshingheight;
 /**
 * 正常未刷新高度
 */
 private int refreshnormalheight;

 public void setrefreshablehelper(refreshablehelper refreshablehelper) {
 this.refreshablehelper = refreshablehelper;
 }

 private context context;

 private void init(context context) {
 this.context = context;

 }

 @override
 protected void onsizechanged(int w, int h, int oldw, int oldh) {
 super.onsizechanged(w, h, oldw, oldh);
 log.d(tag, "[onsizechanged]w: " + w + ", h: " + h);
 log.d(tag, "[onsizechanged]oldw: " + oldw + ", oldh: " + oldh);
 log.d(tag, "[onsizechanged]child counts: " + this.getchildcount());

 }

 @override
 public void setadapter(listadapter adapter) {
 if (null == refreshheaderview) {
  addheaderview();
 }
 super.setadapter(adapter);
 }

 private void addheaderview() {
 if (null != refreshablehelper) {
  refreshheaderview = refreshablehelper.oninitrefreshheaderview();
 }
 if (null == refreshheaderview) {
  log.e(tag, "refreshheaderview is null!");
  return;
 }
 this.addheaderview(refreshheaderview);
 // 计算refreshheadview尺寸
 int width = measurespec.makemeasurespec(0, measurespec.unspecified);
 int expandspec = measurespec.makemeasurespec(integer.max_value >> 2, measurespec.at_most);
 refreshheaderview.measure(width, expandspec);

 originrefreshheight = refreshheaderview.getmeasuredheight();

 boolean isusedefault = true;
 if (null != refreshablehelper) {
  isusedefault = refreshablehelper.oninitrefreshheight(originrefreshheight);
 }

 // 初始化各个高度
 if (isusedefault) {
  refresharrivedstateheight = originrefreshheight;
  refreshingheight = originrefreshheight;
  refreshnormalheight = 0;
 }
 log.d(tag, "[onsizechanged]refreshheaderview origin height: " + originrefreshheight);
 changeviewheight(refreshheaderview, refreshnormalheight);

 // 初始化为正常状态
 setrefreshstate(state_refresh_normal);
 }

 @override
 public boolean dispatchtouchevent(motionevent ev) {
 super.dispatchtouchevent(ev);
// if(motionevent.action_move == ev.getaction()){
//  return true;
// }
// return false;
 return true;
 }

 private float lastdowny = float.max_value;

 @override
 public boolean ontouchevent(motionevent ev) {
// super.ontouchevent(ev);
 log.d(tag, "[ontouchevent]ev action: " + ev.getaction());
 switch (ev.getaction()) {
  case motionevent.action_down:
  super.ontouchevent(ev);
  lastdowny = ev.gety();
  log.d(tag, "down --> lastdowny: " + lastdowny);
  break;
  case motionevent.action_move:
  float cury = ev.gety();
  float deltay = cury - lastdowny;
  log.d(tag, "move --> deltay(cury - downy): " + deltay);

  int curheight = refreshheaderview.getmeasuredheight();
  int exceptheight = curheight + (int) (deltay / 2);

//  boolean istop = this.getscrolly() == 0;
  boolean istop = 0 == this.getchildat(0).gettop();
  boolean isdropdown = cury - lastdowny > 0;
  log.d(tag, "istop: " + istop + ", gettop(): " + this.getchildat(0).gettop());
  if (istop) {
   if (refreshstate == state_refresh_normal && !isdropdown) { // 正常状态，手指往上（列表往下滚动）
   super.ontouchevent(ev);
   } else {
   // 如果当前没有处在正在刷新状态，则更新刷新状态
   if (state_refreshing != refreshstate) {
    if (curheight >= refresharrivedstateheight) { // 达到可刷新状态
    setrefreshstate(state_refresh_arrived);
    } else if (curheight == refreshnormalheight) { // 正常状态
    setrefreshstate(state_refresh_normal);
    } else { // 未达到可刷新状态
    setrefreshstate(state_refresh_not_arrived);
    }
    changeviewheight(refreshheaderview, math.max(refreshnormalheight, exceptheight));
   } else {
    super.ontouchevent(ev);
   }

   }

  } else {
   super.ontouchevent(ev);
  }
  lastdowny = cury;
  break;
  case motionevent.action_up:
  super.ontouchevent(ev);
  lastdowny = float.max_value;
  log.d(tag, "up --> lastdowny: " + lastdowny);
  // 如果是达到刷新状态，则设置正在刷新状态的高度
  if (state_refresh_arrived == refreshstate) { // 达到了刷新的状态
   startheightanimation(refreshheaderview, refreshheaderview.getmeasuredheight(), refreshingheight);
   setrefreshstate(state_refreshing);
  } else if (state_refreshing == refreshstate) { // 正在刷新的状态
   startheightanimation(refreshheaderview, refreshheaderview.getmeasuredheight(), refreshingheight);
  } else {
   // 执行动画后回归正常状态
   startheightanimation(refreshheaderview, refreshheaderview.getmeasuredheight(), refreshnormalheight, normalanimatorlistener);
  }
  break;
 }
 return true;
 }


 /**
 * 刷新完毕后调用此方法
 */
 public void oncompleterefresh() {
 if (state_refreshing == refreshstate) {
  setrefreshstate(state_refresh_normal);
  startheightanimation(refreshheaderview, refreshheaderview.getmeasuredheight(), refreshnormalheight);
 }
 }

 /**
 * 修改当前的刷新状态
 *
 * @param expectrefreshstate
 */
 private void setrefreshstate(int expectrefreshstate) {
 if (expectrefreshstate != refreshstate) {
  refreshstate = expectrefreshstate;
  if (null != refreshablehelper) {
  refreshablehelper.onrefreshstatechanged(refreshheaderview, refreshstate);
  }
 }
 }


 /**
 * 改变某控件的高度
 *
 * @param view
 * @param height
 */
 private void changeviewheight(view view, int height) {
 log.d(tag, "[changeviewheight]change height: " + height);
 viewgroup.layoutparams lp = view.getlayoutparams();
 if (null == lp) {
  lp = new layoutparams(viewgroup.layoutparams.match_parent, 0);
 }
 lp.height = height;
 view.setlayoutparams(lp);
 }

 /**
 * 改变某控件的高度动画
 *
 * @param view
 * @param fromheight
 * @param toheight
 */
 private void startheightanimation(final view view, int fromheight, int toheight) {
 startheightanimation(view, fromheight, toheight, null);
 }

 private void startheightanimation(final view view, int fromheight, int toheight, animator.animatorlistener animatorlistener) {
 if (toheight == view.getmeasuredheight()) {
  return;
 }
 valueanimator heightanimator = valueanimator.ofint(fromheight, toheight);
 heightanimator.addupdatelistener(new valueanimator.animatorupdatelistener() {
  @override
  public void onanimationupdate(valueanimator valueanimator) {
  integer value = (integer) valueanimator.getanimatedvalue();
  if (null == value) return;
  changeviewheight(view, value);
  }
 });
 if (null != animatorlistener) {
  heightanimator.addlistener(animatorlistener);
 }
 heightanimator.setinterpolator(new linearinterpolator());
 heightanimator.setduration(300/*ms*/);
 heightanimator.start();
 }

 animatorlisteneradapter normalanimatorlistener = new animatorlisteneradapter() {
 @override
 public void onanimationend(animator animation) {
  super.onanimationend(animation);
  setrefreshstate(state_refresh_normal); // 回归正常状态
 }
 };

 public void setrefresharrivedstateheight(int refresharrivedstateheight) {
 this.refresharrivedstateheight = refresharrivedstateheight;
 }

 public void setrefreshingheight(int refreshingheight) {
 this.refreshingheight = refreshingheight;
 }

 public void setrefreshnormalheight(int refreshnormalheight) {
 this.refreshnormalheight = refreshnormalheight;
 }

 public int getoriginrefreshheight() {
 return originrefreshheight;
 }

}

package refreshableview;

import android.animation.animator;
import android.animation.animatorlisteneradapter;
import android.animation.valueanimator;
import android.content.context;
import android.content.res.typedarray;
import android.util.attributeset;
import android.util.log;
import android.view.motionevent;
import android.view.view;
import android.view.viewgroup;
import android.view.animation.linearinterpolator;
import android.widget.linearlayout;

import refreshableview.refreshablehelper.refreshablehelper;
import siso.refreshablev.r;

public class refreshableview extends linearlayout {
 private static final string tag = refreshableview.class.getsimplename();

 public refreshableview(context context) {
 super(context);
 init(context);
 }

 public refreshableview(context context, attributeset attrs) {
 super(context, attrs);

 typedarray a = context.obtainstyledattributes(attrs, r.styleable.refreshableview);
 for (int i = 0, len = a.length(); i < len; i++) {
  int attrindex = a.getindex(i);
  switch (attrindex) {
  case r.styleable.refreshableview_interceptallmoveevents:
   interceptallmoveevents = a.getboolean(i, false);
   break;
  }
 }
 a.recycle();

 init(context);
 }

 public refreshableview(context context, attributeset attrs, int defstyle) {
 super(context, attrs, defstyle);
 init(context);
 }

 /**
 * 刷新状态
 */
 public static final int state_refresh_normal = 0x21;
 public static final int state_refresh_not_arrived = 0x22;
 public static final int state_refresh_arrived = 0x23;
 public static final int state_refreshing = 0x24;
 private int refreshstate;
 // 刷新状态监听
 private refreshablehelper refreshablehelper;

 public void setrefreshablehelper(refreshablehelper refreshablehelper) {
 this.refreshablehelper = refreshablehelper;
 }

 private context context;
 /**
 * 刷新的view
 */
 private view refreshheaderview;
 /**
 * 刷新的view的真实高度
 */
 private int originrefreshheight;
 /**
 * 有效下拉刷新需要达到的高度
 */
 private int refresharrivedstateheight;
 /**
 * 刷新时显示的高度
 */
 private int refreshingheight;
 /**
 * 正常未刷新高度
 */
 private int refreshnormalheight;


 /**
 * 默认不允许拦截（即，往子view传递事件），该属性只有在interceptallmoveevents为false的时候才有效
 */
 private boolean disallowintercept = true;
 /**
 * xml中可设置它的值为false，表示不把移动的事件传递给子控件
 */
 private boolean interceptallmoveevents;

 private void init(context context) {
 this.context = context;
 this.setorientation(vertical);

// log.d(tag, "[init]originrefreshheight: " + refreshheaderview.getmeasuredheight());
 }

 @override
 protected void onsizechanged(int w, int h, int oldw, int oldh) {
 super.onsizechanged(w, h, oldw, oldh);

 if (null != refreshablehelper) {
  refreshheaderview = refreshablehelper.oninitrefreshheaderview();
 }
// refreshheaderview = layoutinflater.from(context).inflate(r.layout.refresh_head, null);
 if (null == refreshheaderview) {
  log.e(tag, "refreshheaderview is null!");
  return;
 }
 this.removeview(refreshheaderview);
 this.addview(refreshheaderview, 0);

 // 计算refreshheadview尺寸
 int width = measurespec.makemeasurespec(0, measurespec.unspecified);
 int expandspec = measurespec.makemeasurespec(integer.max_value >> 2, measurespec.at_most);
 refreshheaderview.measure(width, expandspec);

 log.d(tag, "[onsizechanged]w: " + w + ", h: " + h);
 log.d(tag, "[onsizechanged]oldw: " + oldw + ", oldh: " + oldh);
 log.d(tag, "[onsizechanged]child counts: " + this.getchildcount());
 originrefreshheight = refreshheaderview.getmeasuredheight();

 boolean isusedefault = true;
 if (null != refreshablehelper) {
  isusedefault = refreshablehelper.oninitrefreshheight(originrefreshheight);
 }

 // 初始化各个高度
 if (isusedefault) {
  refresharrivedstateheight = originrefreshheight;
  refreshingheight = originrefreshheight;
  refreshnormalheight = 0;
 }
 log.d(tag, "[onsizechanged]refreshheaderview origin height: " + originrefreshheight);
 changeviewheight(refreshheaderview, refreshnormalheight);

 // 初始化为正常状态
 setrefreshstate(state_refresh_normal);

 }

 @override
 public boolean dispatchtouchevent(motionevent ev) {
 log.d(tag, "[dispatchtouchevent]ev action: " + ev.getaction());
 return super.dispatchtouchevent(ev);
 }

 @override
 public boolean onintercepttouchevent(motionevent ev) {
 log.d(tag, "[onintercepttouchevent]ev action: " + ev.getaction());
 if (!interceptallmoveevents) {
  return !disallowintercept;
 }
 // 如果设置了拦截所有move事件，即interceptallmoveevents为true
 if (motionevent.action_move == ev.getaction()) {
  return true;
 }
 return false;
 }

 @override
 public void requestdisallowintercepttouchevent(boolean disallowintercept) {
 if (this.disallowintercept == disallowintercept) {
  return;
 }
 this.disallowintercept = disallowintercept;
 super.requestdisallowintercepttouchevent(disallowintercept);
 }

 private float downy = float.max_value;

 @override
 public boolean ontouchevent(motionevent event) {
// super.ontouchevent(event);
 log.d(tag, "[ontouchevent]ev action: " + event.getaction());
 switch (event.getaction()) {
  case motionevent.action_down:
  downy = event.gety();
  log.d(tag, "down --> downy: " + downy);
  requestdisallowintercepttouchevent(true); // 保证事件可往下传递
  break;
  case motionevent.action_move:

  float cury = event.gety();
  float deltay = cury - downy;
  // 是否是有效的往下拖动事件（则需要显示加载header）
  boolean isdropdownvalidate = float.max_value != downy;
  /**
   * 修改拦截设置
   * 如果是有效往下拖动事件，则事件需要在本viewgroup中处理，所以需要拦截不往子控件传递，即不允许拦截设为false
   * 如果不是有效往下拖动事件，则事件传递给子控件处理，所以不需要拦截，并往子控件传递，即不允许拦截设为true
   */
  requestdisallowintercepttouchevent(!isdropdownvalidate);

  downy = cury;
  log.d(tag, "move --> deltay(cury - downy): " + deltay);
  int curheight = refreshheaderview.getmeasuredheight();
  int exceptheight = curheight + (int) (deltay / 2);

  // 如果当前没有处在正在刷新状态，则更新刷新状态
  if (state_refreshing != refreshstate) {
   if (curheight >= refresharrivedstateheight) { // 达到可刷新状态
   setrefreshstate(state_refresh_arrived);
   } else { // 未达到可刷新状态
   setrefreshstate(state_refresh_not_arrived);
   }
  }
  if (isdropdownvalidate) {
   changeviewheight(refreshheaderview, math.max(refreshnormalheight, exceptheight));
  } else { // 防止从子控件修改拦截后引发的downy为float.max_value的问题
   changeviewheight(refreshheaderview, math.max(curheight, exceptheight));
  }

  break;
  case motionevent.action_up:
  downy = float.max_value;
  log.d(tag, "up --> downy: " + downy);
  requestdisallowintercepttouchevent(true); // 保证事件可往下传递
  // 如果是达到刷新状态，则设置正在刷新状态的高度
  if (state_refresh_arrived == refreshstate) { // 达到了刷新的状态
   startheightanimation(refreshheaderview, refreshheaderview.getmeasuredheight(), refreshingheight);
   setrefreshstate(state_refreshing);
  } else if (state_refreshing == refreshstate) { // 正在刷新的状态
   startheightanimation(refreshheaderview, refreshheaderview.getmeasuredheight(), refreshingheight);
  } else {
   // 执行动画后回归正常状态
   startheightanimation(refreshheaderview, refreshheaderview.getmeasuredheight(), refreshnormalheight, normalanimatorlistener);
  }

  break;
  case motionevent.action_cancel:
  log.d(tag, "cancel");
  break;
 }
 return true;
 }

 /**
 * 刷新完毕后调用此方法
 */
 public void oncompleterefresh() {
 if (state_refreshing == refreshstate) {
  setrefreshstate(state_refresh_normal);
  startheightanimation(refreshheaderview, refreshheaderview.getmeasuredheight(), refreshnormalheight);
 }
 }

 /**
 * 修改当前的刷新状态
 *
 * @param expectrefreshstate
 */
 private void setrefreshstate(int expectrefreshstate) {
 if (expectrefreshstate != refreshstate) {
  refreshstate = expectrefreshstate;
  if (null != refreshablehelper) {
  refreshablehelper.onrefreshstatechanged(refreshheaderview, refreshstate);
  }
 }
 }


 /**
 * 改变某控件的高度
 *
 * @param view
 * @param height
 */
 private void changeviewheight(view view, int height) {
 log.d(tag, "[changeviewheight]change height: " + height);
 viewgroup.layoutparams lp = view.getlayoutparams();
 lp.height = height;
 view.setlayoutparams(lp);
 }

 /**
 * 改变某控件的高度动画
 *
 * @param view
 * @param fromheight
 * @param toheight
 */
 private void startheightanimation(final view view, int fromheight, int toheight) {
 startheightanimation(view, fromheight, toheight, null);
 }

 private void startheightanimation(final view view, int fromheight, int toheight, animator.animatorlistener animatorlistener) {
 if (toheight == view.getmeasuredheight()) {
  return;
 }
 valueanimator heightanimator = valueanimator.ofint(fromheight, toheight);
 heightanimator.addupdatelistener(new valueanimator.animatorupdatelistener() {
  @override
  public void onanimationupdate(valueanimator valueanimator) {
  integer value = (integer) valueanimator.getanimatedvalue();
  if (null == value) return;
  changeviewheight(view, value);
  }
 });
 if (null != animatorlistener) {
  heightanimator.addlistener(animatorlistener);
 }
 heightanimator.setinterpolator(new linearinterpolator());
 heightanimator.setduration(300/*ms*/);
 heightanimator.start();
 }

 animatorlisteneradapter normalanimatorlistener = new animatorlisteneradapter() {
 @override
 public void onanimationend(animator animation) {
  super.onanimationend(animation);
  setrefreshstate(state_refresh_normal); // 回归正常状态
 }
 };

 public void setrefresharrivedstateheight(int refresharrivedstateheight) {
 this.refresharrivedstateheight = refresharrivedstateheight;
 }

 public void setrefreshingheight(int refreshingheight) {
 this.refreshingheight = refreshingheight;
 }

 public void setrefreshnormalheight(int refreshnormalheight) {
 this.refreshnormalheight = refreshnormalheight;
 }

 public int getoriginrefreshheight() {
 return originrefreshheight;
 }
}

package refreshableview.refreshablehelper;

import android.view.view;


public interface refreshablehelper {
 /**
 * 初始化刷新view
 *
 * @return
 */
 view oninitrefreshheaderview();

 /**
 * 初始化各个尺寸高度
 *
 * @param originrefreshheight
 * @return
 */
 boolean oninitrefreshheight(int originrefreshheight);

 /**
 * 刷新状态改变
 *
 * @param refreshview
 * @param refreshstate
 */
 void onrefreshstatechanged(view refreshview, int refreshstate);
}

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:rv="http://schemas.android.com/tools"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent">
 <refreshableview.refreshableview
  android:id="@+id/main_refresh_view"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  rv:interceptallmoveevents="false"
  >
 <refreshableview.nestscrollview android:layout_width="match_parent" android:layout_height="wrap_content"
  android:fillviewport="true"
  >

  <textview
   android:id="@+id/main_tv"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:gravity="center"
   android:padding="20dp"
   android:textsize="18sp"
   android:text="下拉刷新\n\n\n\n\n\n\n\n\n\n\n下拉刷新\n下拉刷新\n\n\n\n\n\n\n\n\n\n\n下拉刷新\n下拉刷新\n\n\n\n\n\n\n\n\n\n\n下拉刷新\n下拉刷新\n\n\n\n\n\n\n\n\n\n\n下拉刷新---下拉刷新\n\n\n\n\n\n\n\n\n\n\n"
   />

 </refreshableview.nestscrollview>
 </refreshableview.refreshableview>

</linearlayout>

<?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"
 android:paddingbottom="@dimen/activity_vertical_margin"
 android:paddingleft="@dimen/activity_horizontal_margin"
 android:paddingright="@dimen/activity_horizontal_margin"
 android:paddingtop="@dimen/activity_vertical_margin"
 tools:context="siso.refreshablev.refreshablelistactivity">

</relativelayout>

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="70dp"
  android:gravity="center"
  android:background="#aa000000"
 >
 <textview
  android:id="@+id/refresh_head_tv"
  android:layout_width="fill_parent"
  android:layout_height="70dp"
  android:gravity="center"
  android:background="#aabbcc"
  android:textsize="18sp"
  android:text="refreshing"
  />

</linearlayout>

<?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">


 <refreshableview.refreshablelistview
  android:id="@+id/refreshable_lv"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:cachecolorhint="@android:color/transparent"
  />

</linearlayout>