Android View 下拉上拉刷新 適合各種控件

package com.example.xrefreshview;

import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
import android.view.WindowManager;
// Demo 下載地址   http://download.csdn.net/detail/u014540181/9587980
//android  View 下拉上拉刷新  適合各種控件
//http://blog.csdn.net/u014540181   關注我的博客，相互交流，學習，進步，祝你生活工作愉快
//2016-07-27  19:45
public class MainActivity extends Activity {
    private MeasureListView list_v;
    private ScrollViewAdapter  adapter;
    private List list;
    private Context mContext;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mContext = this;
        list = new ArrayList();
        for (int i = 0; i < 5; i++) {
            list.add("=="+i);
        }
        adapter = new ScrollViewAdapter(mContext, list);
        list_v = (MeasureListView) findViewById(R.id.list_v);
        list_v.setAdapter(adapter);

        ((PullToRefreshLayout) findViewById(R.id.refresh_view))
        .setOnRefreshListener(new MyListener());
    }
}

// MainActivity 的布局文件


    
    

    

        

            


            

                

                

                
                
                
                
            
        
    

    

package com.example.xrefreshview;

import java.util.Timer;
import java.util.TimerTask;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.RectF;
import android.graphics.Shader.TileMode;
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;

/**
 * 自定義的布局，用來管理三個子控件，其中一個是下拉頭，一個是包含內容的pullableView（可以是實現Pullable接口的的任何View），
 * 還有一個上拉頭，更多詳解見博客http://blog.csdn.net/zhongkejingwang/article/details/38868463
 * 
 * @author 陳靖
 */
public class PullToRefreshLayout extends RelativeLayout
{
    public static final String TAG = "PullToRefreshLayout";
    // 初始狀態
    public static final int INIT = 0;
    // 釋放刷新
    public static final int RELEASE_TO_REFRESH = 1;
    // 正在刷新
    public static final int REFRESHING = 2;
    // 釋放加載
    public static final int RELEASE_TO_LOAD = 3;
    // 正在加載
    public static final int LOADING = 4;
    // 操作完畢
    public static final int DONE = 5;
    // 當前狀態
    private int state = INIT;
    // 刷新回調接口
    private OnRefreshListener mListener;
    // 刷新成功
    public static final int SUCCEED = 0;
    // 刷新失敗
    public static final int FAIL = 1;
    // 按下Y坐標，上一個事件點Y坐標
    private float downY, lastY;

    // 下拉的距離。注意：pullDownY和pullUpY不可能同時不為0
    public float pullDownY = 0;
    // 上拉的距離
    private float pullUpY = 0;

    // 釋放刷新的距離
    private float refreshDist = 200;
    // 釋放加載的距離
    private float loadmoreDist = 200;

    private MyTimer timer;
    // 回滾速度
    public float MOVE_SPEED = 8;
    // 第一次執行布局
    private boolean isLayout = false;
    // 在刷新過程中滑動操作
    private boolean isTouch = false;
    // 手指滑動距離與下拉頭的滑動距離比，中間會隨正切函數變化
    private float radio = 2;

    // 下拉箭頭的轉180°動畫
    private RotateAnimation rotateAnimation;
    // 均勻旋轉動畫
    private RotateAnimation refreshingAnimation;

    // 下拉頭
    private View refreshView;
    // 下拉的箭頭
    private View pullView;
    // 正在刷新的圖標
    private View refreshingView;
    // 刷新結果圖標
    private View refreshStateImageView;
    // 刷新結果：成功或失敗
    private TextView refreshStateTextView;

    // 上拉頭
    private View loadmoreView;
    // 上拉的箭頭
    private View pullUpView;
    // 正在加載的圖標
    private View loadingView;
    // 加載結果圖標
    private View loadStateImageView;
    // 加載結果：成功或失敗
    private TextView loadStateTextView;

    // 實現了Pullable接口的View
    private View pullableView;
    // 過濾多點觸碰
    private int mEvents;
    // 這兩個變量用來控制pull的方向，如果不加控制，當情況滿足可上拉又可下拉時沒法下拉
    private boolean canPullDown = true;
    private boolean canPullUp = true;

    /**
     * 執行自動回滾的handler
     */
    Handler updateHandler = new Handler()
    {

        @Override
        public void handleMessage(Message msg)
        {
            // 回彈速度隨下拉距離moveDeltaY增大而增大
            MOVE_SPEED = (float) (8 + 5 * Math.tan(Math.PI / 2
                    / getMeasuredHeight() * (pullDownY + Math.abs(pullUpY))));
            if (!isTouch)
            {
                // 正在刷新，且沒有往上推的話則懸停，顯示"正在刷新..."
                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)
            {
                // 已完成回彈
                pullDownY = 0;
                pullView.clearAnimation();
                // 隱藏下拉頭時有可能還在刷新，只有當前狀態不是正在刷新時才改變狀態
                if (state != REFRESHING && state != LOADING)
                    changeState(INIT);
                timer.cancel();
            }
            if (pullUpY > 0)
            {
                // 已完成回彈
                pullUpY = 0;
                pullUpView.clearAnimation();
                // 隱藏下拉頭時有可能還在刷新，只有當前狀態不是正在刷新時才改變狀態
                if (state != REFRESHING && state != LOADING)
                    changeState(INIT);
                timer.cancel();
            }
            // 刷新布局,會自動調用onLayout
            requestLayout();
        }

    };

    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)
    {
        timer = new MyTimer(updateHandler);
        rotateAnimation = (RotateAnimation) AnimationUtils.loadAnimation(
                context, R.anim.reverse_anim);
        refreshingAnimation = (RotateAnimation) AnimationUtils.loadAnimation(
                context, R.anim.rotating);
        // 添加勻速轉動動畫
        LinearInterpolator lir = new LinearInterpolator();
        rotateAnimation.setInterpolator(lir);
        refreshingAnimation.setInterpolator(lir);
    }

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

    /**
     * 完成刷新操作，顯示刷新結果。注意：刷新完成後一定要調用這個方法
     */
    /**
     * @param refreshResult
     *            PullToRefreshLayout.SUCCEED代表成功，PullToRefreshLayout.FAIL代表失敗
     */
    public void refreshFinish(int refreshResult)
    {
        refreshingView.clearAnimation();
        refreshingView.setVisibility(View.GONE);
        switch (refreshResult)
        {
        case SUCCEED:
            // 刷新成功
            refreshStateImageView.setVisibility(View.VISIBLE);
            refreshStateTextView.setText(R.string.refresh_succeed);
            refreshStateImageView
                    .setBackgroundResource(R.drawable.refresh_succeed);
            break;
        case FAIL:
        default:
            // 刷新失敗
            refreshStateImageView.setVisibility(View.VISIBLE);
            refreshStateTextView.setText(R.string.refresh_fail);
            refreshStateImageView
                    .setBackgroundResource(R.drawable.refresh_failed);
            break;
        }
        // 刷新結果停留1秒
        new Handler()
        {
            @Override
            public void handleMessage(Message msg)
            {
                changeState(DONE);
                hide();
            }
        }.sendEmptyMessageDelayed(0, 1000);
    }

    /**
     * 加載完畢，顯示加載結果。注意：加載完成後一定要調用這個方法
     * 
     * @param refreshResult
     *            PullToRefreshLayout.SUCCEED代表成功，PullToRefreshLayout.FAIL代表失敗
     */
    public void loadmoreFinish(int refreshResult)
    {
        loadingView.clearAnimation();
        loadingView.setVisibility(View.GONE);
        switch (refreshResult)
        {
        case SUCCEED:
            // 加載成功
            loadStateImageView.setVisibility(View.VISIBLE);
            loadStateTextView.setText(R.string.load_succeed);
            loadStateImageView.setBackgroundResource(R.drawable.load_succeed);
            break;
        case FAIL:
        default:
            // 加載失敗
            loadStateImageView.setVisibility(View.VISIBLE);
            loadStateTextView.setText(R.string.load_fail);
            loadStateImageView.setBackgroundResource(R.drawable.load_failed);
            break;
        }
        // 刷新結果停留1秒
        new Handler()
        {
            @Override
            public void handleMessage(Message msg)
            {
                changeState(DONE);
                hide();
            }
        }.sendEmptyMessageDelayed(0, 1000);
    }

    private void changeState(int to)
    {
        state = to;
        switch (state)
        {
        case INIT:
            // 下拉布局初始狀態
            refreshStateImageView.setVisibility(View.GONE);
            refreshStateTextView.setText(R.string.pull_to_refresh);
            pullView.clearAnimation();
            pullView.setVisibility(View.VISIBLE);
            // 上拉布局初始狀態
            loadStateImageView.setVisibility(View.GONE);
            loadStateTextView.setText(R.string.pullup_to_load);
            pullUpView.clearAnimation();
            pullUpView.setVisibility(View.VISIBLE);
            break;
        case RELEASE_TO_REFRESH:
            // 釋放刷新狀態
            refreshStateTextView.setText(R.string.release_to_refresh);
            pullView.startAnimation(rotateAnimation);
            break;
        case REFRESHING:
            // 正在刷新狀態
            pullView.clearAnimation();
            refreshingView.setVisibility(View.VISIBLE);
            pullView.setVisibility(View.INVISIBLE);
            refreshingView.startAnimation(refreshingAnimation);
            refreshStateTextView.setText(R.string.refreshing);
            break;
        case RELEASE_TO_LOAD:
            // 釋放加載狀態
            loadStateTextView.setText(R.string.release_to_load);
            pullUpView.startAnimation(rotateAnimation);
            break;
        case LOADING:
            // 正在加載狀態
            pullUpView.clearAnimation();
            loadingView.setVisibility(View.VISIBLE);
            pullUpView.setVisibility(View.INVISIBLE);
            loadingView.startAnimation(refreshingAnimation);
            loadStateTextView.setText(R.string.loading);
            break;
        case DONE:
            // 刷新或加載完畢，啥都不做
            break;
        }
    }

    /**
     * 不限制上拉或下拉
     */
    private void releasePull()
    {
        canPullDown = true;
        canPullUp = true;
    }

    /*
     * （非 Javadoc）由父控件決定是否分發事件，防止事件沖突
     * 
     * @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:
            // 過濾多點觸碰
            mEvents = -1;
            break;
        case MotionEvent.ACTION_MOVE:
            if (mEvents == 0)
            {
                if (((Pullable) pullableView).canPullDown() && canPullDown
                        && state != LOADING)
                {
                    // 可以下拉，正在加載時不能下拉
                    // 對實際滑動距離做縮小，造成用力拉的感覺
                    pullDownY = pullDownY + (ev.getY() - lastY) / radio;
                    if (pullDownY < 0)
                    {
                        pullDownY = 0;
                        canPullDown = false;
                        canPullUp = true;
                    }
                    if (pullDownY > getMeasuredHeight())
                        pullDownY = getMeasuredHeight();
                    if (state == REFRESHING)
                    {
                        // 正在刷新的時候觸摸移動
                        isTouch = true;
                    }
                } else if (((Pullable) pullableView).canPullUp() && canPullUp
                        && state != REFRESHING)
                {
                    // 可以上拉，正在刷新時不能上拉
                    pullUpY = pullUpY + (ev.getY() - lastY) / radio;
                    if (pullUpY > 0)
                    {
                        pullUpY = 0;
                        canPullDown = true;
                        canPullUp = false;
                    }
                    if (pullUpY < -getMeasuredHeight())
                        pullUpY = -getMeasuredHeight();
                    if (state == LOADING)
                    {
                        // 正在加載的時候觸摸移動
                        isTouch = true;
                    }
                } else
                    releasePull();
            } else
                mEvents = 0;
            lastY = ev.getY();
            // 根據下拉距離改變比例
            radio = (float) (2 + 2 * Math.tan(Math.PI / 2 / getMeasuredHeight()
                    * (pullDownY + Math.abs(pullUpY))));
            requestLayout();
            if (pullDownY <= refreshDist && state == RELEASE_TO_REFRESH)
            {
                // 如果下拉距離沒達到刷新的距離且當前狀態是釋放刷新，改變狀態為下拉刷新
                changeState(INIT);
            }
            if (pullDownY >= refreshDist && state == INIT)
            {
                // 如果下拉距離達到刷新的距離且當前狀態是初始狀態刷新，改變狀態為釋放刷新
                changeState(RELEASE_TO_REFRESH);
            }
            // 下面是判斷上拉加載的，同上，注意pullUpY是負值
            if (-pullUpY <= loadmoreDist && state == RELEASE_TO_LOAD)
            {
                changeState(INIT);
            }
            if (-pullUpY >= loadmoreDist && state == INIT)
            {
                changeState(RELEASE_TO_LOAD);
            }
            // 因為刷新和加載操作不能同時進行，所以pullDownY和pullUpY不會同時不為0，因此這裡用(pullDownY +
            // Math.abs(pullUpY))就可以不對當前狀態作區分了
            if ((pullDownY + Math.abs(pullUpY)) > 8)
            {
                // 防止下拉過程中誤觸發長按事件和點擊事件
                ev.setAction(MotionEvent.ACTION_CANCEL);
            }
            break;
        case MotionEvent.ACTION_UP:
            if (pullDownY > refreshDist || -pullUpY > loadmoreDist)
                // 正在刷新時往下拉（正在加載時往上拉），釋放後下拉頭（上拉頭）不隱藏
                isTouch = false;
            if (state == RELEASE_TO_REFRESH)
            {
                changeState(REFRESHING);
                // 刷新操作
                if (mListener != null)
                    mListener.onRefresh(this);
            } else if (state == RELEASE_TO_LOAD)
            {
                changeState(LOADING);
                // 加載操作
                if (mListener != null)
                    mListener.onLoadMore(this);
            }
            hide();
        default:
            break;
        }
        // 事件分發交給父類
        super.dispatchTouchEvent(ev);
        return true;
    }

    private void initView()
    {
        // 初始化下拉布局
        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);
        // 初始化上拉布局
        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)
    {
        if (!isLayout)
        {
            // 這裡是第一次進來的時候做一些初始化
            refreshView = getChildAt(0);
            pullableView = getChildAt(1);
            loadmoreView = getChildAt(2);
            isLayout = true;
            initView();
            refreshDist = ((ViewGroup) refreshView).getChildAt(0)
                    .getMeasuredHeight();
            loadmoreDist = ((ViewGroup) loadmoreView).getChildAt(0)
                    .getMeasuredHeight();
        }
        // 改變子控件的布局，這裡直接用(pullDownY + pullUpY)作為偏移量，這樣就可以不對當前狀態作區分
        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();
            }

        }
    }

    /**
     * 刷新加載回調接口
     * 
     * @author chenjing
     * 
     */
    public interface OnRefreshListener
    {
        /**
         * 刷新操作
         */
        void onRefresh(PullToRefreshLayout pullToRefreshLayout);

        /**
         * 加載操作
         */
        void onLoadMore(PullToRefreshLayout pullToRefreshLayout);
    }

}

package com.example.xrefreshview;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ScrollView;

public class PullableScrollView extends ScrollView implements Pullable
{

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

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

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

    public boolean canPullDown()
    {
        if (getScrollY() == 0)
            return true;
        else
            return false;
    }

    public boolean canPullUp()
    {
        if (getScrollY() >= (getChildAt(0).getHeight() - getMeasuredHeight()))
            return true;
        else
            return false;
    }

}

package com.example.xrefreshview;

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

/**
 * 測量高度listview
 * @ClassName: MeasureListView 
 * @Description: TODO 
 * @author Comsys-Administrator 
 * @date 2015-6-7 下午6:31:36
 * 要是 ListView 放在 ScrollView 裡面使用，就這樣寫
 */
public class MeasureListView extends ListView {

    public MeasureListView(Context context, AttributeSet attrs, int defStyle) {

        super(context, attrs, defStyle); // TODO Auto-generated constructor stub

    }

    public MeasureListView(Context context, AttributeSet attrs) {

        super(context, attrs); // TODO Auto-generated constructor stub

    }

    public MeasureListView(Context context) {

        super(context); // TODO Auto-generated constructor stub

    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int hSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
                MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, hSpec);
    }
}

package com.example.xrefreshview;

public interface Pullable
{
    /**
     * 判斷是否可以下拉，如果不需要下拉功能可以直接return false
     * 
     * @return true如果可以下拉否則返回false
     */
    boolean canPullDown();

    /**
     * 判斷是否可以上拉，如果不需要上拉功能可以直接return false
     * 
     * @return true如果可以上拉否則返回false
     */
    boolean canPullUp();
}

package com.example.xrefreshview;

import java.util.List;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

public class ScrollViewAdapter extends BaseAdapter{

    private LayoutInflater layoutInflater;
    private Context mContext;
    private List list;
    private ViewHolder viewHolder;

    public ScrollViewAdapter(Context mContext,List list){
        this.mContext = mContext;
        this.layoutInflater = LayoutInflater.from(mContext);
        this.list = list;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if(convertView == null){
            viewHolder = new ViewHolder();
            convertView = layoutInflater.inflate(R.layout.item_adapter, null);
            viewHolder.itemTv = (TextView) convertView.findViewById(R.id.tex_m);

             convertView.setTag(viewHolder);
         }else{
             viewHolder = (ViewHolder) convertView.getTag();
         }

        viewHolder.itemTv.setText(list.get(position));
        return convertView;
    }

    class ViewHolder{
        TextView itemTv;
    }

}

//  ScrollViewAdapter 的布局文件



    

package com.example.xrefreshview;

import com.example.xrefreshview.PullToRefreshLayout.OnRefreshListener;

import android.os.Handler;
import android.os.Message;

public class MyListener implements OnRefreshListener
{

    public void onRefresh(final PullToRefreshLayout pullToRefreshLayout)
    {
        // 下拉刷新操作
        new Handler()
        {
            @Override
            public void handleMessage(Message msg)
            {
                // 千萬別忘了告訴控件刷新完畢了哦！
                pullToRefreshLayout.refreshFinish(PullToRefreshLayout.SUCCEED);
            }
        }.sendEmptyMessageDelayed(0, 5000);
    }

    public void onLoadMore(final PullToRefreshLayout pullToRefreshLayout)
    {
        // 加載操作
        new Handler()
        {
            @Override
            public void handleMessage(Message msg)
            {
                // 千萬別忘了告訴控件加載完畢了哦！
                pullToRefreshLayout.loadmoreFinish(PullToRefreshLayout.SUCCEED);
            }
        }.sendEmptyMessageDelayed(0, 5000);
    }

}

  // 在res下面建個 anim  文件夾  把這個文件放進去

// 在res下面建個 anim  文件夾  把這個文件放進去

    通用版下拉刷新上拉加載控件
    這裡是HeadView
    下拉刷新
    釋放立即刷新
    正在刷新...
    刷新成功
    刷新失敗
    上拉加載更多
    釋放立即加載
    正在加載...
    加載成功
    加載失敗

    #FFFFFF
    #000000
    #aaaaaa
    #6593cb