安卓中Xlistview的上拉加載和下拉刷新

我們安卓中要實現listview的上拉加載和下拉刷新，使用的是一個名為Xlistview的控件，已經有寫好的包 我們直接導入自己的工程就好

這個是主mainactivity裡面的代碼，主要是初始化xlistview的控件，給xlistview控件設置監聽，實現其接口中的兩個方法，加載和刷新方法，一般就是我們所寫的在網絡請求數據的方法

package com.example.xlistviewtest;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

import org.com.cctest.view.XListView;
import org.com.cctest.view.XListView.IXListViewListener;

import android.app.Activity;
import android.os.Bundle;
import android.text.format.DateFormat;
import android.widget.ArrayAdapter;

public class MainActivity extends Activity {

    private List list;
    int j;
    private ArrayAdapter arrayAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setData();

        final XListView xListView = (XListView) findViewById(R.id.xListView);
        // 激活加載更多
        xListView.setPullLoadEnable(true);
        // 激活下拉刷新
        xListView.setPullRefreshEnable(true);
        // 設置xlistView上拉加載下拉刷新的監聽
        xListView.setXListViewListener(new IXListViewListener() {

            @Override
            // 下拉刷新的回調方法
            public void onRefresh() {
                // 下拉刷新,應該展示最新數據,所以清空集合
                list.clear();
                for (int i = 0; i < 5; i++) {

                    list.add("下拉刷新" + (j += 1));
                }

                arrayAdapter.notifyDataSetChanged();
                //設置刷新時間
                xListView.setRefreshTime(dateFormat());
                //停止加載更多
                xListView.stopLoadMore();
                //停止刷新
                xListView.stopRefresh();
            }

            @Override
            // //上拉加載的回調方法
            public void onLoadMore() {

                for (int i = 0; i < 5; i++) {

                    list.add("上拉加載" + (j += 1));
                }
                arrayAdapter.notifyDataSetChanged();
                //停止加載更多
                xListView.stopLoadMore();
                //停止刷新
                xListView.stopRefresh();
            }
        });

        arrayAdapter = new ArrayAdapter(this,
                android.R.layout.simple_list_item_1, list);

        xListView.setAdapter(arrayAdapter);

    }

    /**
     * 格式化毫秒值
     * 
     * @return
     */
    private String dateFormat() {
        long currentTimeMillis = System.currentTimeMillis();

        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd  hh:mm:ss");

        String format = dateFormat.format(currentTimeMillis);

        return format;
    }

    private void setData() {
        list = new ArrayList<>();
        list.add("aaaaa");
        list.add("bbbbb");
        list.add("cccc");
        list.add("ddddd");
        list.add("eeee");
        list.add("fffff");
        list.add("gggg");
        list.add("hhhhh");
        list.add("iiiii");
    }
}

下面兩個是listview的頭部和足部  每個listview都有這兩個類  裡面主要是重新的一些方法  我們直接類.方法名就可以操作  大家可以看一下裡面的方法

/**
* @file XListView.java
* @package me.maxwin.view
* @create Mar 18, 2012 6:28:41 PM
* @author Maxwin
* @description An ListView support (a) Pull down to refresh, (b) Pull up to load more.
* Implement IXListViewListener, and see stopRefresh() / stopLoadMore().
*/
package org.com.cctest.view;

import com.example.xlistviewtest.R;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.view.animation.DecelerateInterpolator;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.Scroller;
import android.widget.TextView;

public class XListView extends ListView implements OnScrollListener {

private float mLastY = -1; // save event y
private Scroller mScroller; // used for scroll back
private OnScrollListener mScrollListener; // user's scroll listener

// the interface to trigger refresh and load more.
private IXListViewListener mListViewListener;

// -- header view
private XListViewHeader mHeaderView;
// header view content, use it to calculate the Header's height. And hide it
// when disable pull refresh.
private RelativeLayout mHeaderViewContent;
private TextView mHeaderTimeView;
private int mHeaderViewHeight; // header view's height
private boolean mEnablePullRefresh = true;
private boolean mPullRefreshing = false; // is refreashing.

// -- footer view
private XListViewFooter mFooterView;
private boolean mEnablePullLoad;
private boolean mPullLoading;
private boolean mIsFooterReady = false;

// total list items, used to detect is at the bottom of listview.
private int mTotalItemCount;

// for mScroller, scroll back from header or footer.
private int mScrollBack;
private final static int SCROLLBACK_HEADER = 0;
private final static int SCROLLBACK_FOOTER = 1;

private final static int SCROLL_DURATION = 400; // scroll back duration
private final static int PULL_LOAD_MORE_DELTA = 50; // when pull up >= 50px
                                                    // at bottom, trigger
                                                    // load more.
private final static float OFFSET_RADIO = 1.8f; // support iOS like pull
                                                // feature.

/**
 * @param context
 */
public XListView(Context context) {
    super(context);
    initWithContext(context);
}

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

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

private void initWithContext(Context context) {
    mScroller = new Scroller(context, new DecelerateInterpolator());
    // XListView need the scroll event, and it will dispatch the event to
    // user's listener (as a proxy).
    super.setOnScrollListener(this);

    // init header view
    mHeaderView = new XListViewHeader(context);
    mHeaderViewContent = (RelativeLayout) mHeaderView
            .findViewById(R.id.xlistview_header_content);
    mHeaderTimeView = (TextView) mHeaderView
            .findViewById(R.id.xlistview_header_time);
    addHeaderView(mHeaderView);

    // init footer view
    mFooterView = new XListViewFooter(context);

    // init header height
    mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener(
            new OnGlobalLayoutListener() {
                @Override
                public void onGlobalLayout() {
                    mHeaderViewHeight = mHeaderViewContent.getHeight();
                    getViewTreeObserver()
                            .removeGlobalOnLayoutListener(this);
                }
            });
}

@Override
public void setAdapter(ListAdapter adapter) {
    // make sure XListViewFooter is the last footer view, and only add once.
    if (mIsFooterReady == false) {
        mIsFooterReady = true;
        addFooterView(mFooterView);
    }
    super.setAdapter(adapter);
}

/**
 * enable or disable pull down refresh feature.
 * 
 * @param enable
 */
public void setPullRefreshEnable(boolean enable) {
    mEnablePullRefresh = enable;
    if (!mEnablePullRefresh) { // disable, hide the content
        mHeaderViewContent.setVisibility(View.INVISIBLE);
    } else {
        mHeaderViewContent.setVisibility(View.VISIBLE);
    }
}

/**
 * enable or disable pull up load more feature.
 * 
 * @param enable
 */
public void setPullLoadEnable(boolean enable) {
    mEnablePullLoad = enable;
    if (!mEnablePullLoad) {
        mFooterView.hide();
        mFooterView.setOnClickListener(null);
    } else {
        mPullLoading = false;
        mFooterView.show();
        mFooterView.setState(XListViewFooter.STATE_NORMAL);
        // both "pull up" and "click" will invoke load more.
        mFooterView.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                startLoadMore();
            }
        });
    }
}

/**
 * stop refresh, reset header view.
 */
public void stopRefresh() {
    if (mPullRefreshing == true) {
        mPullRefreshing = false;
        resetHeaderHeight();
    }
}

/**
 * stop load more, reset footer view.
 */
public void stopLoadMore() {
    if (mPullLoading == true) {
        mPullLoading = false;
        mFooterView.setState(XListViewFooter.STATE_NORMAL);
    }
}

/**
 * set last refresh time
 * 
 * @param time
 */
public void setRefreshTime(String time) {
    mHeaderTimeView.setText(time);
}

private void invokeOnScrolling() {
    if (mScrollListener instanceof OnXScrollListener) {
        OnXScrollListener l = (OnXScrollListener) mScrollListener;
        l.onXScrolling(this);
    }
}

private void updateHeaderHeight(float delta) {
    mHeaderView.setVisiableHeight((int) delta
            + mHeaderView.getVisiableHeight());
    if (mEnablePullRefresh && !mPullRefreshing) { // δ?????????????????
        if (mHeaderView.getVisiableHeight() > mHeaderViewHeight) {
            mHeaderView.setState(XListViewHeader.STATE_READY);
        } else {
            mHeaderView.setState(XListViewHeader.STATE_NORMAL);
        }
    }
    setSelection(0); // scroll to top each time
}

/**
 * reset header view's height.
 */
private void resetHeaderHeight() {
    int height = mHeaderView.getVisiableHeight();
    if (height == 0) // not visible.
        return;
    // refreshing and header isn't shown fully. do nothing.
    if (mPullRefreshing && height <= mHeaderViewHeight) {
        return;
    }
    int finalHeight = 0; // default: scroll back to dismiss header.
    // is refreshing, just scroll back to show all the header.
    if (mPullRefreshing && height > mHeaderViewHeight) {
        finalHeight = mHeaderViewHeight;
    }
    mScrollBack = SCROLLBACK_HEADER;
    mScroller.startScroll(0, height, 0, finalHeight - height,
            SCROLL_DURATION);
    // trigger computeScroll
    invalidate();
}

private void updateFooterHeight(float delta) {
    int height = mFooterView.getBottomMargin() + (int) delta;
    if (mEnablePullLoad && !mPullLoading) {
        if (height > PULL_LOAD_MORE_DELTA) { // height enough to invoke load
                                                // more.
            mFooterView.setState(XListViewFooter.STATE_READY);
        } else {
            mFooterView.setState(XListViewFooter.STATE_NORMAL);
        }
    }
    mFooterView.setBottomMargin(height);

// setSelection(mTotalItemCount - 1); // scroll to bottom
}

private void resetFooterHeight() {
    int bottomMargin = mFooterView.getBottomMargin();
    if (bottomMargin > 0) {
        mScrollBack = SCROLLBACK_FOOTER;
        mScroller.startScroll(0, bottomMargin, 0, -bottomMargin,
                SCROLL_DURATION);
        invalidate();
    }
}

private void startLoadMore() {
    mPullLoading = true;
    mFooterView.setState(XListViewFooter.STATE_LOADING);
    if (mListViewListener != null) {
        mListViewListener.onLoadMore();
    }
}

@Override
public boolean onTouchEvent(MotionEvent ev) {
    if (mLastY == -1) {
        mLastY = ev.getRawY();
    }

    switch (ev.getAction()) {
    case MotionEvent.ACTION_DOWN:
        mLastY = ev.getRawY();
        break;
    case MotionEvent.ACTION_MOVE:
        final float deltaY = ev.getRawY() - mLastY;
        mLastY = ev.getRawY();
        if (getFirstVisiblePosition() == 0
                && (mHeaderView.getVisiableHeight() > 0 || deltaY > 0)) {
            // the first item is showing, header has shown or pull down.
            updateHeaderHeight(deltaY / OFFSET_RADIO);
            invokeOnScrolling();
        } else if (getLastVisiblePosition() == mTotalItemCount - 1
                && (mFooterView.getBottomMargin() > 0 || deltaY < 0)) {
            // last item, already pulled up or want to pull up.
            updateFooterHeight(-deltaY / OFFSET_RADIO);
        }
        break;
    default:
        mLastY = -1; // reset
        if (getFirstVisiblePosition() == 0) {
            // invoke refresh
            if (mEnablePullRefresh
                    && mHeaderView.getVisiableHeight() > mHeaderViewHeight) {
                mPullRefreshing = true;
                mHeaderView.setState(XListViewHeader.STATE_REFRESHING);
                if (mListViewListener != null) {
                    mListViewListener.onRefresh();
                }
            }
            resetHeaderHeight();
        } else if (getLastVisiblePosition() == mTotalItemCount - 1) {
            // invoke load more.
            if (mEnablePullLoad
                    && mFooterView.getBottomMargin() > PULL_LOAD_MORE_DELTA) {
                startLoadMore();
            }
            resetFooterHeight();
        }
        break;
    }
    return super.onTouchEvent(ev);
}

@Override
public void computeScroll() {
    if (mScroller.computeScrollOffset()) {
        if (mScrollBack == SCROLLBACK_HEADER) {
            mHeaderView.setVisiableHeight(mScroller.getCurrY());
        } else {
            mFooterView.setBottomMargin(mScroller.getCurrY());
        }
        postInvalidate();
        invokeOnScrolling();
    }
    super.computeScroll();
}

@Override
public void setOnScrollListener(OnScrollListener l) {
    mScrollListener = l;
}

@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
    if (mScrollListener != null) {
        mScrollListener.onScrollStateChanged(view, scrollState);
    }
}

@Override
public void onScroll(AbsListView view, int firstVisibleItem,
        int visibleItemCount, int totalItemCount) {
    // send to user's listener
    mTotalItemCount = totalItemCount;
    if (mScrollListener != null) {
        mScrollListener.onScroll(view, firstVisibleItem, visibleItemCount,
                totalItemCount);
    }
}

public void setXListViewListener(IXListViewListener l) {
    mListViewListener = l;
}

/**
 * you can listen ListView.OnScrollListener or this one. it will invoke
 * onXScrolling when header/footer scroll back.
 */
public interface OnXScrollListener extends OnScrollListener {
    public void onXScrolling(View view);
}

/**
 * implements this interface to get refresh/load more event.
 */
public interface IXListViewListener {
    public void onRefresh();

    public void onLoadMore();
}

}

下面是頭部

/**
 * @file XListView.java
 * @package me.maxwin.view
 * @create Mar 18, 2012 6:28:41 PM
 * @author Maxwin
 * @description An ListView support (a) Pull down to refresh, (b) Pull up to load more.
 *      Implement IXListViewListener, and see stopRefresh() / stopLoadMore().
 */
package org.com.cctest.view;



import com.example.xlistviewtest.R;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.view.animation.DecelerateInterpolator;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.Scroller;
import android.widget.TextView;

public class XListView extends ListView implements OnScrollListener {

    private float mLastY = -1; // save event y
    private Scroller mScroller; // used for scroll back
    private OnScrollListener mScrollListener; // user's scroll listener

    // the interface to trigger refresh and load more.
    private IXListViewListener mListViewListener;

    // -- header view
    private XListViewHeader mHeaderView;
    // header view content, use it to calculate the Header's height. And hide it
    // when disable pull refresh.
    private RelativeLayout mHeaderViewContent;
    private TextView mHeaderTimeView;
    private int mHeaderViewHeight; // header view's height
    private boolean mEnablePullRefresh = true;
    private boolean mPullRefreshing = false; // is refreashing.

    // -- footer view
    private XListViewFooter mFooterView;
    private boolean mEnablePullLoad;
    private boolean mPullLoading;
    private boolean mIsFooterReady = false;

    // total list items, used to detect is at the bottom of listview.
    private int mTotalItemCount;

    // for mScroller, scroll back from header or footer.
    private int mScrollBack;
    private final static int SCROLLBACK_HEADER = 0;
    private final static int SCROLLBACK_FOOTER = 1;

    private final static int SCROLL_DURATION = 400; // scroll back duration
    private final static int PULL_LOAD_MORE_DELTA = 50; // when pull up >= 50px
                                                        // at bottom, trigger
                                                        // load more.
    private final static float OFFSET_RADIO = 1.8f; // support iOS like pull
                                                    // feature.

    /**
     * @param context
     */
    public XListView(Context context) {
        super(context);
        initWithContext(context);
    }

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

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

    private void initWithContext(Context context) {
        mScroller = new Scroller(context, new DecelerateInterpolator());
        // XListView need the scroll event, and it will dispatch the event to
        // user's listener (as a proxy).
        super.setOnScrollListener(this);

        // init header view
        mHeaderView = new XListViewHeader(context);
        mHeaderViewContent = (RelativeLayout) mHeaderView
                .findViewById(R.id.xlistview_header_content);
        mHeaderTimeView = (TextView) mHeaderView
                .findViewById(R.id.xlistview_header_time);
        addHeaderView(mHeaderView);

        // init footer view
        mFooterView = new XListViewFooter(context);

        // init header height
        mHeaderView.getViewTreeObserver().addOnGlobalLayoutListener(
                new OnGlobalLayoutListener() {
                    @Override
                    public void onGlobalLayout() {
                        mHeaderViewHeight = mHeaderViewContent.getHeight();
                        getViewTreeObserver()
                                .removeGlobalOnLayoutListener(this);
                    }
                });
    }

    @Override
    public void setAdapter(ListAdapter adapter) {
        // make sure XListViewFooter is the last footer view, and only add once.
        if (mIsFooterReady == false) {
            mIsFooterReady = true;
            addFooterView(mFooterView);
        }
        super.setAdapter(adapter);
    }

    /**
     * enable or disable pull down refresh feature.
     * 
     * @param enable
     */
    public void setPullRefreshEnable(boolean enable) {
        mEnablePullRefresh = enable;
        if (!mEnablePullRefresh) { // disable, hide the content
            mHeaderViewContent.setVisibility(View.INVISIBLE);
        } else {
            mHeaderViewContent.setVisibility(View.VISIBLE);
        }
    }

    /**
     * enable or disable pull up load more feature.
     * 
     * @param enable
     */
    public void setPullLoadEnable(boolean enable) {
        mEnablePullLoad = enable;
        if (!mEnablePullLoad) {
            mFooterView.hide();
            mFooterView.setOnClickListener(null);
        } else {
            mPullLoading = false;
            mFooterView.show();
            mFooterView.setState(XListViewFooter.STATE_NORMAL);
            // both "pull up" and "click" will invoke load more.
            mFooterView.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    startLoadMore();
                }
            });
        }
    }

    /**
     * stop refresh, reset header view.
     */
    public void stopRefresh() {
        if (mPullRefreshing == true) {
            mPullRefreshing = false;
            resetHeaderHeight();
        }
    }

    /**
     * stop load more, reset footer view.
     */
    public void stopLoadMore() {
        if (mPullLoading == true) {
            mPullLoading = false;
            mFooterView.setState(XListViewFooter.STATE_NORMAL);
        }
    }

    /**
     * set last refresh time
     * 
     * @param time
     */
    public void setRefreshTime(String time) {
        mHeaderTimeView.setText(time);
    }

    private void invokeOnScrolling() {
        if (mScrollListener instanceof OnXScrollListener) {
            OnXScrollListener l = (OnXScrollListener) mScrollListener;
            l.onXScrolling(this);
        }
    }

    private void updateHeaderHeight(float delta) {
        mHeaderView.setVisiableHeight((int) delta
                + mHeaderView.getVisiableHeight());
        if (mEnablePullRefresh && !mPullRefreshing) { // δ?????????????????
            if (mHeaderView.getVisiableHeight() > mHeaderViewHeight) {
                mHeaderView.setState(XListViewHeader.STATE_READY);
            } else {
                mHeaderView.setState(XListViewHeader.STATE_NORMAL);
            }
        }
        setSelection(0); // scroll to top each time
    }

    /**
     * reset header view's height.
     */
    private void resetHeaderHeight() {
        int height = mHeaderView.getVisiableHeight();
        if (height == 0) // not visible.
            return;
        // refreshing and header isn't shown fully. do nothing.
        if (mPullRefreshing && height <= mHeaderViewHeight) {
            return;
        }
        int finalHeight = 0; // default: scroll back to dismiss header.
        // is refreshing, just scroll back to show all the header.
        if (mPullRefreshing && height > mHeaderViewHeight) {
            finalHeight = mHeaderViewHeight;
        }
        mScrollBack = SCROLLBACK_HEADER;
        mScroller.startScroll(0, height, 0, finalHeight - height,
                SCROLL_DURATION);
        // trigger computeScroll
        invalidate();
    }

    private void updateFooterHeight(float delta) {
        int height = mFooterView.getBottomMargin() + (int) delta;
        if (mEnablePullLoad && !mPullLoading) {
            if (height > PULL_LOAD_MORE_DELTA) { // height enough to invoke load
                                                    // more.
                mFooterView.setState(XListViewFooter.STATE_READY);
            } else {
                mFooterView.setState(XListViewFooter.STATE_NORMAL);
            }
        }
        mFooterView.setBottomMargin(height);

//      setSelection(mTotalItemCount - 1); // scroll to bottom
    }

    private void resetFooterHeight() {
        int bottomMargin = mFooterView.getBottomMargin();
        if (bottomMargin > 0) {
            mScrollBack = SCROLLBACK_FOOTER;
            mScroller.startScroll(0, bottomMargin, 0, -bottomMargin,
                    SCROLL_DURATION);
            invalidate();
        }
    }

    private void startLoadMore() {
        mPullLoading = true;
        mFooterView.setState(XListViewFooter.STATE_LOADING);
        if (mListViewListener != null) {
            mListViewListener.onLoadMore();
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        if (mLastY == -1) {
            mLastY = ev.getRawY();
        }

        switch (ev.getAction()) {
        case MotionEvent.ACTION_DOWN:
            mLastY = ev.getRawY();
            break;
        case MotionEvent.ACTION_MOVE:
            final float deltaY = ev.getRawY() - mLastY;
            mLastY = ev.getRawY();
            if (getFirstVisiblePosition() == 0
                    && (mHeaderView.getVisiableHeight() > 0 || deltaY > 0)) {
                // the first item is showing, header has shown or pull down.
                updateHeaderHeight(deltaY / OFFSET_RADIO);
                invokeOnScrolling();
            } else if (getLastVisiblePosition() == mTotalItemCount - 1
                    && (mFooterView.getBottomMargin() > 0 || deltaY < 0)) {
                // last item, already pulled up or want to pull up.
                updateFooterHeight(-deltaY / OFFSET_RADIO);
            }
            break;
        default:
            mLastY = -1; // reset
            if (getFirstVisiblePosition() == 0) {
                // invoke refresh
                if (mEnablePullRefresh
                        && mHeaderView.getVisiableHeight() > mHeaderViewHeight) {
                    mPullRefreshing = true;
                    mHeaderView.setState(XListViewHeader.STATE_REFRESHING);
                    if (mListViewListener != null) {
                        mListViewListener.onRefresh();
                    }
                }
                resetHeaderHeight();
            } else if (getLastVisiblePosition() == mTotalItemCount - 1) {
                // invoke load more.
                if (mEnablePullLoad
                        && mFooterView.getBottomMargin() > PULL_LOAD_MORE_DELTA) {
                    startLoadMore();
                }
                resetFooterHeight();
            }
            break;
        }
        return super.onTouchEvent(ev);
    }

    @Override
    public void computeScroll() {
        if (mScroller.computeScrollOffset()) {
            if (mScrollBack == SCROLLBACK_HEADER) {
                mHeaderView.setVisiableHeight(mScroller.getCurrY());
            } else {
                mFooterView.setBottomMargin(mScroller.getCurrY());
            }
            postInvalidate();
            invokeOnScrolling();
        }
        super.computeScroll();
    }

    @Override
    public void setOnScrollListener(OnScrollListener l) {
        mScrollListener = l;
    }

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        if (mScrollListener != null) {
            mScrollListener.onScrollStateChanged(view, scrollState);
        }
    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem,
            int visibleItemCount, int totalItemCount) {
        // send to user's listener
        mTotalItemCount = totalItemCount;
        if (mScrollListener != null) {
            mScrollListener.onScroll(view, firstVisibleItem, visibleItemCount,
                    totalItemCount);
        }
    }

    public void setXListViewListener(IXListViewListener l) {
        mListViewListener = l;
    }

    /**
     * you can listen ListView.OnScrollListener or this one. it will invoke
     * onXScrolling when header/footer scroll back.
     */
    public interface OnXScrollListener extends OnScrollListener {
        public void onXScrolling(View view);
    }

    /**
     * implements this interface to get refresh/load more event.
     */
    public interface IXListViewListener {
        public void onRefresh();

        public void onLoadMore();
    }
}

下面的是listview的足部類

/**
* @file XFooterView.java
* @create Mar 31, 2012 9:33:43 PM
* @author Maxwin
* @description XListView’s footer
*/
package org.com.cctest.view;

import com.example.xlistviewtest.R;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;

public class XListViewFooter extends LinearLayout {
public final static int STATE_NORMAL = 0;
public final static int STATE_READY = 1;
public final static int STATE_LOADING = 2;

private Context mContext;

private View mContentView;
private View mProgressBar;
private TextView mHintView;

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

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


public void setState(int state) {
    mHintView.setVisibility(View.INVISIBLE);
    mProgressBar.setVisibility(View.INVISIBLE);
    mHintView.setVisibility(View.INVISIBLE);
    if (state == STATE_READY) {
        mHintView.setVisibility(View.VISIBLE);
        mHintView.setText(R.string.xlistview_footer_hint_ready);
    } else if (state == STATE_LOADING) {
        mProgressBar.setVisibility(View.VISIBLE);
    } else {
        mHintView.setVisibility(View.VISIBLE);
        mHintView.setText(R.string.xlistview_footer_hint_normal);
    }
}

public void setBottomMargin(int height) {
    if (height < 0) return ;
    LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams();
    lp.bottomMargin = height;
    mContentView.setLayoutParams(lp);
}

public int getBottomMargin() {
    LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams();
    return lp.bottomMargin;
}


/**
 * normal status
 */
public void normal() {
    mHintView.setVisibility(View.VISIBLE);
    mProgressBar.setVisibility(View.GONE);
}


/**
 * loading status 
 */
public void loading() {
    mHintView.setVisibility(View.GONE);
    mProgressBar.setVisibility(View.VISIBLE);
}

/**
 * hide footer when disable pull load more
 */
public void hide() {
    LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams();
    lp.height = 0;
    mContentView.setLayoutParams(lp);
}

/**
 * show footer
 */
public void show() {
    LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)mContentView.getLayoutParams();
    lp.height = LayoutParams.WRAP_CONTENT;
    mContentView.setLayoutParams(lp);
}

private void initView(Context context) {
    mContext = context;
    LinearLayout moreView = (LinearLayout)LayoutInflater.from(mContext).inflate(R.layout.xlistview_footer, null);
    addView(moreView);
    moreView.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

    mContentView = moreView.findViewById(R.id.xlistview_footer_content);
    mProgressBar = moreView.findViewById(R.id.xlistview_footer_progressbar);
    mHintView = (TextView)moreView.findViewById(R.id.xlistview_footer_hint_textview);
}

}

在我們將這三個類導入工程後還可能出現一些錯誤
（1） 首先 是導包 要刪除原來額包
（2） 其次是對values下的string.xml修改一下配置
要把下面的代碼配置 賦值到自己的string下

下拉刷新 松開刷新數據 正在加載... 上次更新時間： 查看更多 松開載入更多


（3） 最後還會發現 還有圖片也得導進去  

```![這個圖片就是上拉箭頭](http://img.blog.csdn.net/20160810165544356)


最後的最後 大家一定不要忘了 將Xlistview的頭部和底部的layout布局文件也一塊拷過去

底部xml文件

xml文件名 xlistview_footer