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

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 = true;
    }

    /*
     * 閿涘牓娼�Javadoc閿涘鏁遍悥鑸靛付娴犺泛鍠呯�姘Ц閸氾箑鍨庨崣鎴滅皑娴犺绱濋梼鍙夘剾娴滃娆㈤崘鑼崐
     * 
     * @see android.view.ViewGroup#dispatchTouchEvent(android.view.MotionEvent)
     */
    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        switch (ev.getActionMasked()) {
        case MotionEvent.ACTION_DOWN:
            downY = ev.getY();
            lastY = downY;
            timer.cancel();
            mEvents = 0;
            releasePull();
            break;
        case MotionEvent.ACTION_POINTER_DOWN:
        case MotionEvent.ACTION_POINTER_UP:
            // 鏉╁洦鎶ゆ径姘卞仯鐟欙妇顫�
            mEvents = -1;
            break;
        case MotionEvent.ACTION_MOVE:
            if (mEvents == 0) {
                if (pullDownY > 0
                        || (((Pullable) pullableView).canPullDown()
                                && canPullDown && state != LOADING)) {
                    // 閸欘垯浜掓稉瀣閿涘本顒滈崷銊ュ鏉炶姤妞傛稉宥堝厴娑撳濯�
                    // 鐎电懓鐤勯梽鍛拨閸斻劏绐涚粋璇蹭粵缂傗晛鐨敍宀勶拷閹存劗鏁ら崝娑欏閻ㄥ嫭鍔呯憴锟�
                    pullDownY = pullDownY + (ev.getY() - lastY) / radio;
                    if (pullDownY < 0) {
                        pullDownY = 0;
                        canPullDown = false;
                        canPullUp = true;
                    }
                    if (pullDownY > getMeasuredHeight())
                        pullDownY = getMeasuredHeight();
                    if (state == REFRESHING) {
                        // 濮濓絽婀崚閿嬫煀閻ㄥ嫭妞傞崐娆捫曢幗鍝バ╅崝锟�
                        isTouch = true;
                    }
                } else if (pullUpY < 0
                        || (((Pullable) pullableView).canPullUp() && canPullUp && state != REFRESHING)) {
                    // 閸欘垯浜掓稉濠冨閿涘本顒滈崷銊ュ煕閺傜増妞傛稉宥堝厴娑撳﹥濯�
                    pullUpY = pullUpY + (ev.getY() - lastY) / radio;
                    if (pullUpY > 0) {
                        pullUpY = 0;
                        canPullDown = true;
                        canPullUp = false;
                    }
                    if (pullUpY < -getMeasuredHeight())
                        pullUpY = -getMeasuredHeight();
                    if (state == LOADING) {
                        // 濮濓絽婀崝鐘烘祰閻ㄥ嫭妞傞崐娆捫曢幗鍝バ╅崝锟�
                        isTouch = true;
                    }
                } else
                    releasePull();
            } else
                mEvents = 0;
            lastY = ev.getY();
            // 閺嶈宓佹稉瀣鐠烘繄顬囬弨鐟板綁濮ｆ柧绶�
            radio = (float) (2 + 2 * Math.tan(Math.PI / 2 / getMeasuredHeight()
                    * (pullDownY + Math.abs(pullUpY))));
            if (pullDownY > 0 || pullUpY < 0)
                requestLayout();
            if (pullDownY > 0) {
                if (pullDownY <= refreshDist
                        && (state == RELEASE_TO_REFRESH || state == DONE)) {
                    // 婵″倹鐏夋稉瀣鐠烘繄顬囧▽陇鎻崚鏉垮煕閺傛壆娈戠捄婵堫瀲娑撴柨缍嬮崜宥囧Ц閹焦妲搁柌濠冩杹閸掗攱鏌婇敍灞炬暭閸欐濮搁幀浣疯礋娑撳濯洪崚閿嬫煀
                    changeState(INIT);
                }
                if (pullDownY >= refreshDist && state == INIT) {
                    // 婵″倹鐏夋稉瀣鐠烘繄顬囨潏鎯у煂閸掗攱鏌婇惃鍕獩缁傝绗栬ぐ鎾冲閻樿埖锟介弰顖氬灥婵濮搁幀浣稿煕閺傚府绱濋弨鐟板綁閻樿埖锟芥稉娲櫞閺�儳鍩涢弬锟�
                    changeState(RELEASE_TO_REFRESH);
                }
            } else if (pullUpY < 0) {
                // 娑撳娼伴弰顖氬灲閺傤厺绗傞幏澶婂鏉炵晫娈戦敍灞芥倱娑撳绱濆▔銊﹀壈pullUpY閺勵垵绀嬮崐锟�
                if (-pullUpY <= loadmoreDist
                        && (state == RELEASE_TO_LOAD || state == DONE)) {
                    changeState(INIT);
                }
                // 娑撳﹥濯洪幙宥勭稊
                if (-pullUpY >= loadmoreDist && state == INIT) {
                    changeState(RELEASE_TO_LOAD);
                }

            }
            // 閸ョ姳璐熼崚閿嬫煀閸滃苯濮炴潪鑺ユ惙娴ｆ粈绗夐懗钘夋倱閺冩儼绻樼悰宀嬬礉閹碉拷浜抪ullDownY閸滃ullUpY娑撳秳绱伴崥灞炬娑撳秳璐�閿涘苯娲滃銈堢箹闁插瞼鏁�pullDownY
            // +
            // Math.abs(pullUpY))鐏忓崬褰叉禒銉ょ瑝鐎电懓缍嬮崜宥囧Ц閹椒缍旈崠鍝勫瀻娴滐拷
            if ((pullDownY + Math.abs(pullUpY)) > 8) {
                // 闂冨弶顒涙稉瀣鏉╁洨鈻兼稉顓☆嚖鐟欙箑褰傞梹鎸庡瘻娴滃娆㈤崪宀�仯閸戣绨ㄦ禒锟�
                ev.setAction(MotionEvent.ACTION_CANCEL);
            }
            break;
        case MotionEvent.ACTION_UP:
            if (pullDownY > refreshDist || -pullUpY > loadmoreDist)
            // 濮濓絽婀崚閿嬫煀閺冭泛绶氭稉瀣閿涘牊顒滈崷銊ュ鏉炶姤妞傚锟界瑐閹峰绱氶敍宀勫櫞閺�儳鎮楁稉瀣婢惰揪绱欐稉濠冨婢惰揪绱氭稉宥夋閽橈拷
            {
                isTouch = false;
            }
            if (state == RELEASE_TO_REFRESH) {
                changeState(REFRESHING);
                // 閸掗攱鏌婇幙宥勭稊
                if (mListener != null)
                    mListener.onRefresh(this);
            } else if (state == RELEASE_TO_LOAD) {
                changeState(LOADING);
                // 閸旂姾娴囬幙宥勭稊
                if (mListener != null)
                    mListener.onLoadMore(this);
            }
            hide();
        default:
            break;
        }
        // 娴滃娆㈤崚鍡楀絺娴溿倗绮伴悥鍓佽
        super.dispatchTouchEvent(ev);
        return true;
    }

    /**
     * @author chenjing 閼奉亜濮╁Ο鈩冨珯閹靛瀵氬鎴濆З閻ㄥ墖ask
     * 
     */
    private class AutoRefreshAndLoadTask extends
            AsyncTask<Integer, Float, String> {

        @Override
        protected String doInBackground(Integer... params) {
            while (pullDownY < 4 / 3 * refreshDist) {
                pullDownY += MOVE_SPEED;
                publishProgress(pullDownY);
                try {
                    Thread.sleep(params[0]);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            return null;
        }

        @Override
        protected void onPostExecute(String result) {
            changeState(REFRESHING);
            // 閸掗攱鏌婇幙宥勭稊
            if (mListener != null)
                mListener.onRefresh(PullToRefreshLayout.this);
            hide();
        }

        @Override
        protected void onProgressUpdate(Float... values) {
            if (pullDownY > refreshDist)
                changeState(RELEASE_TO_REFRESH);
            requestLayout();
        }

    }

    /**
     * 閼奉亜濮╅崚閿嬫煀
     */
    public void autoRefresh() {
        AutoRefreshAndLoadTask task = new AutoRefreshAndLoadTask();
        task.execute(20);
    }

    /**
     * 閼奉亜濮╅崝鐘烘祰
     */
    public void autoLoad() {
        pullUpY = -loadmoreDist;
        requestLayout();
        changeState(LOADING);
        // 閸旂姾娴囬幙宥勭稊
        if (mListener != null)
            mListener.onLoadMore(this);
    }

    private void initView() {
        // 閸掓繂顫愰崠鏍︾瑓閹峰绔风仦锟�
        pullView = refreshView.findViewById(R.id.pull_icon);
        refreshStateTextView = (TextView) refreshView
                .findViewById(R.id.state_tv);
        refreshingView = refreshView.findViewById(R.id.refreshing_icon);
        refreshStateImageView = refreshView.findViewById(R.id.state_iv);
        // 閸掓繂顫愰崠鏍︾瑐閹峰绔风仦锟�
        pullUpView = loadmoreView.findViewById(R.id.pullup_icon);
        loadStateTextView = (TextView) loadmoreView
                .findViewById(R.id.loadstate_tv);
        loadingView = loadmoreView.findViewById(R.id.loading_icon);
        loadStateImageView = loadmoreView.findViewById(R.id.loadstate_iv);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        Log.d("Test", "Test");
        if (!isLayout) {
            // 鏉╂瑩鍣烽弰顖滎儑娑擄拷顐兼潻娑欐降閻ㄥ嫭妞傞崐娆忎粵娑擄拷绨洪崚婵嗩潗閸栵拷
            refreshView = getChildAt(0);
            pullableView = getChildAt(1);
            loadmoreView = getChildAt(2);
            isLayout = true;
            initView();
            refreshDist = ((ViewGroup) refreshView).getChildAt(0)
                    .getMeasuredHeight();
            loadmoreDist = ((ViewGroup) loadmoreView).getChildAt(0)
                    .getMeasuredHeight();
        }
        // 閺�懓褰夌�鎰付娴犲墎娈戠敮鍐ㄧ湰閿涘矁绻栭柌宀�纯閹恒儳鏁�pullDownY +
        // pullUpY)娴ｆ粈璐熼崑蹇曅╅柌蹇ョ礉鏉╂瑦鐗辩亸鍗炲讲娴犮儰绗夌�鐟扮秼閸撳秶濮搁幀浣风稊閸栧搫鍨�
        refreshView.layout(0,
                (int) (pullDownY + pullUpY) - refreshView.getMeasuredHeight(),
                refreshView.getMeasuredWidth(), (int) (pullDownY + pullUpY));
        pullableView.layout(0, (int) (pullDownY + pullUpY),
                pullableView.getMeasuredWidth(), (int) (pullDownY + pullUpY)
                        + pullableView.getMeasuredHeight());
        loadmoreView.layout(0,
                (int) (pullDownY + pullUpY) + pullableView.getMeasuredHeight(),
                loadmoreView.getMeasuredWidth(),
                (int) (pullDownY + pullUpY) + pullableView.getMeasuredHeight()
                        + loadmoreView.getMeasuredHeight());
    }

    class MyTimer {
        private Handler handler;
        private Timer timer;
        private MyTask mTask;

        public MyTimer(Handler handler) {
            this.handler = handler;
            timer = new Timer();
        }

        public void schedule(long period) {
            if (mTask != null) {
                mTask.cancel();
                mTask = null;
            }
            mTask = new MyTask(handler);
            timer.schedule(mTask, 0, period);
        }

        public void cancel() {
            if (mTask != null) {
                mTask.cancel();
                mTask = null;
            }
        }

        class MyTask extends TimerTask {
            private Handler handler;

            public MyTask(Handler handler) {
                this.handler = handler;
            }

            @Override
            public void run() {
                handler.obtainMessage().sendToTarget();
            }

        }
    }

    /**
     * 閸掗攱鏌婇崝鐘烘祰閸ョ偠鐨熼幒銉ュ經
     * 
     * @author chenjing
     * 
     */
    public interface OnRefreshListener {
        /**
         * 閸掗攱鏌婇幙宥勭稊
         */
        void onRefresh(PullToRefreshLayout pullToRefreshLayout);

        /**
         * 閸旂姾娴囬幙宥勭稊
         */
        void onLoadMore(PullToRefreshLayout pullToRefreshLayout);

    }

}

下面是MainActivity

/MainActivity/src/com/exmple/pull/MainActivity.java

package com.exmple.pull;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.Window;

import com.chen.listTongyong.Base1;
import com.eample.vo.MyData;
import com.eample.vo.Super;
import com.exaple.tong.PullToRefreshLayout;
import com.exaple.tong.PullableListView;
import com.exaple.tong.PullToRefreshLayout.OnRefreshListener;
import com.google.gson.Gson;

public class MainActivity extends Activity {

    Handler h = new Handler() {
        public void handleMessage(Message msg) {
            if (msg.what == 1) {
                String result = (String) msg.obj;
                Gson g = new Gson();
                Super ms = g.fromJson(result, Super.class);
                List<MyData> data = ms.getData();
                list = data;
                ba = new Base1(MainActivity.this, list);
                plistview.setAdapter(ba);
            }
            if (msg.what == 2) {
                String result = (String) msg.obj;
                Gson g = new Gson();
                Super ms = g.fromJson(result, Super.class);
                List<MyData> data = ms.getData();
                list.addAll(data);
                ba.notifyDataSetChanged();
            }

        }

    };

    int page = 1;
    String url = "http://api.expoon.com/AppNews/getNewsList/type/1/p/";
    private List<MyData> list = new ArrayList<MyData>();
    private Base1 ba;
    private PullableListView plistview;
    private PullToRefreshLayout layout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 设置隐藏标题
        requestWindowFeature(Window.FEATURE_NO_TITLE);

       
        setContentView(R.layout.activity_main);
        //找控件
        plistview = (PullableListView) findViewById(R.id.listview);
        layout = (PullToRefreshLayout) findViewById(R.id.layout);
         //刚进去显示数据
        setJson(page);
        layout.setOnRefreshListener(new OnRefreshListener() {
              //下拉刷新
            @Override
            public void onRefresh(PullToRefreshLayout pullToRefreshLayout) {
                h.postDelayed(new Runnable() {

                    @Override
                    public void run() {
                        int page = 1;
                        setJson(page);
                        layout.refreshFinish(PullToRefreshLayout.SUCCEED);

                    }
                }, 10);

            }
            //加载更多
            @Override
            public void onLoadMore(PullToRefreshLayout pullToRefreshLayout) {
                h.postDelayed(new Runnable() {

                    @Override
                    public void run() {

                        page++;
                        new Thread() {
                            public void run() {
                                String string = NetUtil.getData(url + page);

                                h.sendMessage(h.obtainMessage(2, string));
                            }
                        }.start();
                        layout.loadmoreFinish(PullToRefreshLayout.SUCCEED);

                    }
                }, 10);

            }
        });

    }
    
    private void setJson(final int pa) {
        new Thread() {
            public void run() {
                String string = NetUtil.getData(url + pa);

                h.sendMessage(h.obtainMessage(1, string));
            }
        }.start();

    }

}

/MainActivity/src/com/exmple/pull/NetUtil.java 请求数据

package com.exmple.pull;

import java.io.IOException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.DefaultedHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.util.EntityUtils;

public class NetUtil {
    public static String getData(String str){
        
        String str1="";
        HttpGet get=new HttpGet(str);
        HttpParams parmas=new BasicHttpParams();
        HttpConnectionParams.setConnectionTimeout(parmas, 5000);
        HttpConnectionParams.setSoTimeout(parmas, 5000);
        HttpClient client=new DefaultHttpClient(parmas);
        try {
            HttpResponse execute = client.execute(get);
            if(execute.getStatusLine().getStatusCode()==200)
            {
                HttpEntity entity=execute.getEntity();
                str1=EntityUtils.toString(entity, "UTF-8");
            }
        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return str1;
    }

}

下面是list集合的vo包（两个）

/MainActivity/src/com/eample/vo/Super.java （1）

package com.eample.vo;

import java.util.List;

public class Super {
    List<MyData> data;
    String info;
    int status;
    public List<MyData> getData() {
        return data;
    }
    public void setData(List<MyData> data) {
        this.data = data;
    }
    public String getInfo() {
        return info;
    }
    public void setInfo(String info) {
        this.info = info;
    }
    public int getStatus() {
        return status;
    }
    public void setStatus(int status) {
        this.status = status;
    }
    @Override
    public String toString() {
        return "Super [data=" + data + ", info=" + info + ", status=" + status
                + "]";
    }
    public Super(List<MyData> data, String info, int status) {
        super();
        this.data = data;
        this.info = info;
        this.status = status;
    }
    public Super() {
        super();
        // TODO Auto-generated constructor stub
    }
    
    

}

/MainActivity/src/com/eample/vo/MyData.java （2）

package com.eample.vo;

public class MyData {
    String news_id;
    String news_summary;
    String news_title;
    String pic_url;
    public String getNews_id() {
        return news_id;
    }
    public void setNews_id(String news_id) {
        this.news_id = news_id;
    }
    public String getNews_summary() {
        return news_summary;
    }
    public void setNews_summary(String news_summary) {
        this.news_summary = news_summary;
    }
    public String getNews_title() {
        return news_title;
    }
    public void setNews_title(String news_title) {
        this.news_title = news_title;
    }
    public String getPic_url() {
        return pic_url;
    }
    public void setPic_url(String pic_url) {
        this.pic_url = pic_url;
    }
    @Override
    public String toString() {
        return "MyData [news_id=" + news_id + ", news_summary=" + news_summary
                + ", news_title=" + news_title + ", pic_url=" + pic_url + "]";
    }
    public MyData(String news_id, String news_summary, String news_title,
            String pic_url) {
        super();
        this.news_id = news_id;
        this.news_summary = news_summary;
        this.news_title = news_title;
        this.pic_url = pic_url;
    }
    public MyData() {
        super();
        // TODO Auto-generated constructor stub
    }

}

下面是listview适配器

/MainActivity/src/com/chen/listTongyong/Base1.java

package com.chen.listTongyong;

import java.util.List;

import com.eample.vo.MyData;
import com.exaple.tong.PullToRefreshLayout;
import com.exaple.tong.PullToRefreshLayout.OnRefreshListener;
import com.exmple.pull.R;
import com.lidroid.xutils.BitmapUtils;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.PopupWindow;
import android.widget.TextView;


public class Base1 extends BaseAdapter {
    Context co;
    List<MyData> list;
    private View view;
    private ViewHolder vh;

    public Base1(Context co, List<MyData> list) {
        super();
        this.co = co;
        this.list = list;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            view = View.inflate(co, R.layout.base, null);
            vh = new ViewHolder();
            vh.image = (ImageView) view.findViewById(R.id.image);
            vh.text = (TextView) view.findViewById(R.id.text);
            view.setTag(vh);

        } else {
            view = convertView;
            vh = (ViewHolder) view.getTag();

        }
        
        vh.text.setText(list.get(position).getNews_title());
        BitmapUtils bit = new BitmapUtils(co);
        bit.display(vh.image, list.get(position).getPic_url());

        return view;
    }

    public class ViewHolder {
        TextView text;
        ImageView image;

    }

    

}

posted @ 2016-03-31 12:34 无名“ 阅读(607) 评论(0) 编辑收藏举报

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