Android实现下拉刷新上拉加载（PullToRefreshLayout）

Posted 2020-07-02 <菜鸟@号>

各个组件位置：  导xutils包gson包配置网络权限

values包下面

strings修改

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">Pull</string>
    <string name="hello_world">Hello world!</string>
    <string name="menu_settings">Settings</string>
    <string name="head">这里是HeadView</string>
    
    <string name="pull_to_refresh">下拉刷新</string>
    <string name="release_to_refresh">释放立即刷新</string>
    <string name="refreshing">正在刷新...</string>
    <string name="refresh_succeed">刷新成功</string>
    <string name="refresh_fail">刷新失败</string>
    <string name="pullup_to_load">上拉加载更多</string>
    <string name="release_to_load">释放立即加载</string>
    <string name="loading">正在加载...</string>
    <string name="load_succeed">加载成功</string>
    <string name="load_fail">加载失败</string>

</resources>

添一个color.xml 在这可以修改颜色

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="white">#FFFFFF</color>
    <color name="black">#000000</color>
    <color name="gray">#f00</color>
    <color name="light_blue">#f00</color>
</resources>

在res文件夹下创个anim文件夹添加动画（两个）

/MainActivity/res/anim/reverse_anim.xml

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="100"
    android:fillAfter="true"
    android:fromDegrees="0"
    android:pivotX="50%"
    android:pivotY="50%"
    android:repeatCount="0"
    android:toDegrees="180" >
 
</rotate>

/MainActivity/res/anim/rotating.xml

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="1500"
    android:fillAfter="true"
    android:fromDegrees="0"
    android:pivotX="50%"
    android:pivotY="50%"
    android:repeatCount="-1"
    android:toDegrees="360" >
 
</rotate>

在res下layout下添加两部局

/MainActivity/res/layout/load_more.xml 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/loadmore_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/gray" >

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:paddingBottom="20dp"
android:paddingTop="20dp" >

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerInParent="true" >

<ImageView
android:id="@+id/pullup_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="60dp"
android:background="@drawable/pullup_icon_big" />

<ImageView
android:id="@+id/loading_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="60dp"
android:background="@drawable/loading"
android:visibility="gone" />

<TextView
android:id="@+id/loadstate_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:text="@string/pullup_to_load"
android:textColor="@color/black"
android:textSize="16sp" />

<ImageView
android:id="@+id/loadstate_iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginRight="8dp"
android:layout_toLeftOf="@id/loadstate_tv"
android:visibility="gone" />
</RelativeLayout>
</RelativeLayout>

</RelativeLayout>

 

/MainActivity/res/layout/refresh_head.xml  

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/head_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/light_blue" >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:paddingBottom="20dp"
        android:paddingTop="20dp" >

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true" >

            <ImageView
                android:id="@+id/pull_icon"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:layout_marginLeft="60dp"
                android:background="@drawable/pull_icon_big" />

            <ImageView
                android:id="@+id/refreshing_icon"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:layout_marginLeft="60dp"
                android:background="@drawable/refreshing"
                android:visibility="gone" />

            <TextView
                android:id="@+id/state_tv"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:text="@string/pull_to_refresh"
                android:textColor="@color/white"
                android:textSize="16sp" />

            <ImageView
                android:id="@+id/state_iv"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:layout_marginRight="8dp"
                android:layout_toLeftOf="@id/state_tv"
                android:visibility="gone" />
        </RelativeLayout>
    </RelativeLayout>

</RelativeLayout>

修改/MainActivity/res/layout/activity_main.xml布局（注意红色包名）

<com.exaple.tong.PullToRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >
<include 
    layout="@layout/refresh_head"
    
    />
    <com.exaple.tong.PullableListView
        android:id="@+id/listview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="@string/hello_world" />
<include 
    layout="@layout/load_more"
    
    />

</com.exaple.tong.PullToRefreshLayout>

 

/MainActivity/res/layout/base.xml  子布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" />

    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="hhh" />

</LinearLayout>

下面在src文件夹下

先创个com.exaple.tong包里面有三个类（固定的直接粘）

/MainActivity/src/com/exaple/tong/Pullable.java   （1）

package com.exaple.tong;
 
public interface Pullable
{
    /**
     * 判断是否可以下拉，如果不需要下拉功能可以直接return false
     *
     * @return true如果可以下拉否则返回false
     */
    boolean canPullDown();
 
    /**
     * 判断是否可以上拉，如果不需要上拉功能可以直接return false
     *
     * @return true如果可以上拉否则返回false
     */
    boolean canPullUp();
}

/MainActivity/src/com/exaple/tong/PullableListView.java    （2）

package com.exaple.tong;



import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.ListView;

public class PullableListView extends ListView implements Pullable
{

public PullableListView(Context context)
{
super(context);
}

public PullableListView(Context context, AttributeSet attrs)
{
super(context, attrs);
}

public PullableListView(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
}

@Override
public boolean canPullDown()
{
if (getCount() == 0)
{
// 娌℃湁item鐨勬椂鍊欎篃鍙互涓嬫媺鍒锋柿
return true;
} else if (getFirstVisiblePosition() == 0
&& getChildAt(0).getTop() >= 0)
{
// 婊戝埌ListView鐨勯《閮ㄤ簡
return true;
} else
return false;
}

@Override
public boolean canPullUp()
{
if (getCount() == 0)
{
// 娌℃湁item鐨勬椂鍊欎篃鍙互涓婃媺鍔犺浿
return true;
} else if (getLastVisiblePosition() == (getCount() - 1))
{
// 婊戝埌搴曢儴浜?
if (getChildAt(getLastVisiblePosition() - getFirstVisiblePosition()) != null
&& getChildAt(
getLastVisiblePosition()
- getFirstVisiblePosition()).getBottom() <= getMeasuredHeight())
return true;
}
return false;
}
}

/MainActivity/src/com/exaple/tong/PullToRefreshLayout.java    （3）

package com.exaple.tong;

import java.util.Timer;
import java.util.TimerTask;

import com.exmple.pull.R;

import android.app.Activity;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AnimationUtils;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.widget.RelativeLayout;
import android.widget.TextView;

/**
 * 閼奉亜鐣炬稊澶屾畱鐢啫鐪敍宀?暏閺夈儳顓搁悶鍡曠瑏娑擃亜鐡欓幒褌娆㈤敍灞藉従娑擃厺绔存稉顏呮Ц娑撳濯烘径杈剧礉娑擄拷閲滈弰顖氬瘶閸氼偄鍞寸?鍦
 * 畱pullableView閿涘牆褰叉禒銉︽Ц鐎圭偟骞嘝ullable閹恒儱褰涢惃鍕畱娴犺缍峍iew閿涘绱?
 * 鏉╂ɑ婀佹稉锟介嚋娑撳﹥濯烘径杈剧礉閺囨潙顦跨拠锕佇掔憴浣稿触鐎诡晭ttp
 * ://blog.csdn.net/zhongkejingwang/article/details/38868463
 * 
 * @author 闂勫牓娼?
 */
public class PullToRefreshLayout extends RelativeLayout {
    public static final String TAG = "PullToRefreshLayout";
    // 閸掓繂顫愰悩鑸碉拷
    public static final int INIT = 0;
    // 闁插﹥鏂侀崚閿嬫煀
    public static final int RELEASE_TO_REFRESH = 1;
    // 濮濓絽婀崚閿嬫煀
    public static final int REFRESHING = 2;
    // 闁插﹥鏂侀崝鐘烘祰
    public static final int RELEASE_TO_LOAD = 3;
    // 濮濓絽婀崝鐘烘祰
    public static final int LOADING = 4;
    // 閹垮秳缍旂?灞剧槸
    public static final int DONE = 5;
    // 瑜版挸澧犻悩鑸碉拷
    private int state = INIT;
    // 閸掗攱鏌婇崶鐐剁殶閹恒儱褰?
    private OnRefreshListener mListener;
    // 閸掗攱鏌婇幋鎰
    public static final int SUCCEED = 0;
    // 閸掗攱鏌婃径杈Е
    public static final int FAIL = 1;
    // 閹稿绗匶閸ф劖鐖ｉ敍灞肩瑐娑擄拷閲滄禍瀣╂閻愮瓬閸ф劖鐖?
    private float downY, lastY;

    // 娑撳濯洪惃鍕獩缁傛眹锟藉▔銊﹀壈閿涙ullDownY閸滃ullUpY娑撳秴褰查懗钘夋倱閺冩湹绗夋稉锟?
    public float pullDownY = 0;
    // 娑撳﹥濯洪惃鍕獩缁傦拷
    private float pullUpY = 0;

    // 闁插﹥鏂侀崚閿嬫煀閻ㄥ嫯绐涚粋锟?
    private float refreshDist = 200;
    // 闁插﹥鏂侀崝鐘烘祰閻ㄥ嫯绐涚粋锟?
    private float loadmoreDist = 200;

    private MyTimer timer;
    // 閸ョ偞绮撮柅鐔峰
    public float MOVE_SPEED = 8;
    // 缁楊兛绔村▎鈩冨⒔鐞涘苯绔风仦锟?
    private boolean isLayout = false;
    // 閸︺劌鍩涢弬鎷岀箖缁嬪鑵戝鎴濆З閹垮秳缍?
    private boolean isTouch = false;
    // 閹靛瀵氬鎴濆З鐠烘繄顬囨稉搴濈瑓閹峰銇旈惃鍕拨閸斻劏绐涚粋缁樼槷閿涘奔鑵戦梻缈犵窗闂呭繑顒滈崚鍥у毐閺佹澘褰夐崠锟?
    private float radio = 2;

    // 娑撳濯虹粻顓炪仈閻ㄥ嫯娴?80鎺抽崝銊ф暰
    private RotateAnimation rotateAnimation;
    // 閸у洤瀵戦弮瀣祮閸斻劎鏁?
    private RotateAnimation refreshingAnimation;

    // 娑撳濯烘径锟?
    private View refreshView;
    // 娑撳濯洪惃鍕唲婢讹拷
    private View pullView;
    // 濮濓絽婀崚閿嬫煀閻ㄥ嫬娴橀弽锟?
    private View refreshingView;
    // 閸掗攱鏌婄紒鎾寸亯閸ョ偓鐖?
    private View refreshStateImageView;
    // 閸掗攱鏌婄紒鎾寸亯閿涙碍鍨氶崝鐔稿灗婢惰精瑙?
    private TextView refreshStateTextView;

    // 娑撳﹥濯烘径锟?
    private View loadmoreView;
    // 娑撳﹥濯洪惃鍕唲婢讹拷
    private View pullUpView;
    // 濮濓絽婀崝鐘烘祰閻ㄥ嫬娴橀弽锟?
    private View loadingView;
    // 閸旂姾娴囩紒鎾寸亯閸ョ偓鐖?
    private View loadStateImageView;
    // 閸旂姾娴囩紒鎾寸亯閿涙碍鍨氶崝鐔稿灗婢惰精瑙?
    private TextView loadStateTextView;

    // 鐎圭偟骞囨禍鍝杣llable閹恒儱褰涢惃鍒卛ew
    private View pullableView;
    // 鏉╁洦鎶ゆ径姘卞仯鐟欙妇顫?
    private int mEvents;
    // 鏉╂瑤琚辨稉顏勫綁闁插繒鏁ら弶銉﹀付閸掔ull閻ㄥ嫭鏌熼崥鎴礉婵″倹鐏夋稉宥呭閹貉冨煑閿涘苯缍嬮幆鍛枌濠娐ゅ喕閸欘垯绗傞幏澶婂嫉閸欘垯绗呴幏澶嬫濞屸剝纭舵稉瀣
    private boolean canPullDown = true;
    private boolean canPullUp = true;

    private Context mContext;

    /**
     * 閹笛嗩攽閼奉亜濮╅崶鐐寸泊閻ㄥ埅andler
     */
    Handler updateHandler = new Handler() {

        @Override
        public void handleMessage(Message msg) {
            // 閸ョ偛鑴婇柅鐔峰闂呭繋绗呴幏澶庣獩缁傜北oveDeltaY婢х偛銇囬懓灞筋杻婢讹拷
            MOVE_SPEED = (float) (8 + 5 * Math.tan(Math.PI / 2
                    / getMeasuredHeight() * (pullDownY + Math.abs(pullUpY))));
            if (!isTouch) {
                // 濮濓絽婀崚閿嬫煀閿涘奔绗栧▽鈩冩箒瀵帮拷绗傞幒銊ф畱鐠囨繂鍨幃顒?粻閿涘本妯夌粈锟藉锝呮躬閸掗攱鏌?.."
                if (state == REFRESHING && pullDownY <= refreshDist) {
                    pullDownY = refreshDist;
                    timer.cancel();
                } else if (state == LOADING && -pullUpY <= loadmoreDist) {
                    pullUpY = -loadmoreDist;
                    timer.cancel();
                }

            }
            if (pullDownY > 0)
                pullDownY -= MOVE_SPEED;
            else if (pullUpY < 0)
                pullUpY += MOVE_SPEED;
            if (pullDownY < 0) {
                // 瀹告彃鐣幋鎰礀瀵拷
                pullDownY = 0;
                pullView.clearAnimation();
                // 闂呮劘妫屾稉瀣婢跺瓨妞傞張澶婂讲閼冲?绻曢崷銊ュ煕閺傚府绱濋崣顏呮箒瑜版挸澧犻悩鑸碉拷娑撳秵妲稿锝呮躬閸掗攱鏌婇弮鑸靛閺?懓褰夐悩鑸碉拷
                if (state != REFRESHING && state != LOADING)
                    changeState(INIT);
                timer.cancel();
                requestLayout();
            }
            if (pullUpY > 0) {
                // 瀹告彃鐣幋鎰礀瀵拷
                pullUpY = 0;
                pullUpView.clearAnimation();
                // 闂呮劘妫屾稉濠冨婢跺瓨妞傞張澶婂讲閼冲?绻曢崷銊ュ煕閺傚府绱濋崣顏呮箒瑜版挸澧犻悩鑸碉拷娑撳秵妲稿锝呮躬閸掗攱鏌婇弮鑸靛閺?懓褰夐悩鑸碉拷
                if (state != REFRESHING && state != LOADING)
                    changeState(INIT);
                timer.cancel();
                requestLayout();
            }
            Log.d("handle", "handle");
            // 閸掗攱鏌婄敮鍐ㄧ湰,娴兼俺鍤滈崝銊ㄧ殶閻⑩暙nLayout
            requestLayout();
            // 濞屸剝婀侀幏鏍ㄥ閹存牞锟介崶鐐茶剨鐎瑰本鍨?
            if (pullDownY + Math.abs(pullUpY) == 0)
                timer.cancel();
        }

    };

    public void setOnRefreshListener(OnRefreshListener listener) {
        mListener = listener;
    }

    public PullToRefreshLayout(Context context) {
        super(context);
        initView(context);
    }

    public PullToRefreshLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        initView(context);
    }

    public PullToRefreshLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        initView(context);
    }

    private void initView(Context context) {
        mContext = context;
        timer = new MyTimer(updateHandler);
        rotateAnimation = (RotateAnimation) AnimationUtils.loadAnimation(
                context, R.anim.reverse_anim);
        refreshingAnimation = (RotateAnimation) AnimationUtils.loadAnimation(
                context, R.anim.rotating);
        // 濞ｈ濮為崠锟斤拷鏉烆剙濮╅崝銊ф暰
        LinearInterpolator lir = new LinearInterpolator();
        rotateAnimation.setInterpolator(lir);
        refreshingAnimation.setInterpolator(lir);
    }

    private void hide() {
        timer.schedule(5);
    }

    /**
     * 鐎瑰本鍨氶崚閿嬫煀閹垮秳缍旈敍灞炬▔缁?搫鍩涢弬鎵波閺嬫嚎锟藉▔銊﹀壈閿涙艾鍩涢弬鏉跨暚閹存劕鎮楁稉锟界暰鐟曚浇鐨熼悽銊ㄧ箹娑擃亝鏌熷▔锟?
     */
    /**
     * @param refreshResult
     *            PullToRefreshLayout.SUCCEED娴狅綀銆冮幋鎰閿涘ullToRefreshLayout.
     *            FAIL娴狅綀銆冩径杈Е
     */
    public void refreshFinish(int refreshResult) {
        refreshingView.clearAnimation();
        refreshingView.setVisibility(View.GONE);
        switch (refreshResult) {
        case SUCCEED:
            // 閸掗攱鏌婇幋鎰
            refreshStateImageView.setVisibility(View.VISIBLE);
            refreshStateTextView.setText(R.string.refresh_succeed);
            refreshStateImageView
                    .setBackgroundResource(R.drawable.refresh_succeed);
            break;
        case FAIL:
        default:
            // 閸掗攱鏌婃径杈Е
            refreshStateImageView.setVisibility(View.VISIBLE);
            refreshStateTextView.setText(R.string.refresh_fail);
            refreshStateImageView
                    .setBackgroundResource(R.drawable.refresh_failed);
            break;
        }
        if (pullDownY > 0) {
            // 閸掗攱鏌婄紒鎾寸亯閸嬫粎鏆?缁夛拷
            new Handler() {
                @Override
                public void handleMessage(Message msg) {
                    changeState(DONE);
                    hide();
                }
            }.sendEmptyMessageDelayed(0, 1000);
        } else {
            changeState(DONE);
            hide();
        }
    }

    /**
     * 閸旂姾娴囩?灞剧槸閿涘本妯夌粈鍝勫鏉炵晫绮ㄩ弸婧匡拷濞夈劍鍓伴敍姘鏉炶棄鐣幋鎰倵娑擄拷鐣剧憰浣界殶閻€劏绻栨稉顏呮煙濞夛拷
     * 
     * @param refreshResult
     *            PullToRefreshLayout.SUCCEED娴狅綀銆冮幋鎰閿涘ullToRefreshLayout.
     *            FAIL娴狅綀銆冩径杈Е
     */
    public void loadmoreFinish(int refreshResult) {
        loadingView.clearAnimation();
        loadingView.setVisibility(View.GONE);
        switch (refreshResult) {
        case SUCCEED:
            // 閸旂姾娴囬幋鎰
            loadStateImageView.setVisibility(View.VISIBLE);
            loadStateTextView.setText(R.string.load_succeed);
            loadStateImageView.setBackgroundResource(R.drawable.load_succeed);
            break;
        case FAIL:
        default:
            // 閸旂姾娴囨径杈Е
            loadStateImageView.setVisibility(View.VISIBLE);
            loadStateTextView.setText(R.string.load_fail);
            loadStateImageView.setBackgroundResource(R.drawable.load_failed);
            break;
        }
        if (pullUpY < 0) {
            // 閸掗攱鏌婄紒鎾寸亯閸嬫粎鏆?缁夛拷
            new Handler() {
                @Override
                public void handleMessage(Message msg) {
                    changeState(DONE);
                    hide();
                }
            }.sendEmptyMessageDelayed(0, 1000);
        } else {
            changeState(DONE);
            hide();
        }
    }

    private void changeState(int to) {
        state = to;
        switch (state) {
        case INIT:
            // 娑撳濯虹敮鍐ㄧ湰閸掓繂顫愰悩鑸碉拷
            refreshStateImageView.setVisibility(View.GONE);
            refreshStateTextView.setText(R.string.pull_to_refresh);
            pullView.clearAnimation();
            pullView.setVisibility(View.VISIBLE);
            // 娑撳﹥濯虹敮鍐ㄧ湰閸掓繂顫愰悩鑸碉拷
            loadStateImageView.setVisibility(View.GONE);
            loadStateTextView.setText(R.string.pullup_to_load);
            pullUpView.clearAnimation();
            pullUpView.setVisibility(View.VISIBLE);
            break;
        case RELEASE_TO_REFRESH:
            // 闁插﹥鏂侀崚閿嬫煀閻樿埖锟?
            refreshStateTextView.setText(R.string.release_to_refresh);
            pullView.startAnimation(rotateAnimation);
            break;
        case REFRESHING:
            // 濮濓絽婀崚閿嬫煀閻樿埖锟?
            pullView.clearAnimation();
            refreshingView.setVisibility(View.VISIBLE);
            pullView.setVisibility(View.INVISIBLE);
            refreshingView.startAnimation(refreshingAnimation);
            refreshStateTextView.setText(R.string.refreshing);
            break;
        case RELEASE_TO_LOAD:
            // 闁插﹥鏂侀崝鐘烘祰閻樿埖锟?
            loadStateTextView.setText(R.string.release_to_load);
            pullUpView.startAnimation(rotateAnimation);
            break;
        case LOADING:
            // 濮濓絽婀崝鐘烘祰閻樿埖锟?
            pullUpView.clearAnimation();
            loadingView.setVisibility(View.VISIBLE);
            pullUpView.setVisibility(View.INVISIBLE);
            loadingView.startAnimation(refreshingAnimation);
            loadStateTextView.setText(R.string.loading);
            break;
        case DONE:
            // 閸掗攱鏌婇幋鏍у鏉炶棄鐣В鏇礉閸熴儵鍏樻稉宥呬粵
            break;
        }
    }

    /**
     * 娑撳秹妾洪崚鏈电瑐閹峰鍨ㄦ稉瀣
     */
    private void releasePull() {
        canPullDown = true;
        canPullUp = tru