?public int getVisiableHeight() {
? return mContainer.getLayoutParams().height;
?}

}

XListView类

/**
?* @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 me.maxwin.view;

import me.maxwin.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);