Android实现Iphone中ListView上下加载数据效果

package com.aiven.widget; import com.aiven.view.R.styleable; import android.content.Context; import android.content.res.TypedArray; import android.util.AttributeSet; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.animation.Animation; import android.widget.AbsListView; import android.widget.AbsListView.OnScrollListener; import android.widget.AdapterView; import android.widget.ListView; /** * @author Aiven * @date 2012/07/27 * @ 上下加载ListView * */ public class AppendList extends ListView implements OnScrollListener { private static final int STATE_RELEASE_FRESH = 1001;// 释放刷新态 private static final int STATE_INTO_RELESE = 1002;// 未进入释放刷新态 private static final int STATE_REFRESHING = 1003;// 正在刷新态 private static final int STATE_DONE = 1004;// 初始态 public static final int DERECTION_UP = 1005;// 上加载 public static final int DERECTION_DOWN = 1006;// 底部加载 public boolean isHiddenFooter; private int mState; private View mHeadView; private View mFootView; private int mHeadHeight; private int mFootHeight; private int mHeadResouceId; private int mFootResouceId; // *** 记录ListView 当前显示信息 **///////// private int mDataTotal; private int mDataFirstIndex; private int mDataViewCount; private static final float RATIO = 2.8f; private static final float RATIO2=1.4f; private int mStartY; private boolean mHeadRecard; private boolean mFootRecard; private boolean isBack; private View mHeadAnimationView; private View mFootAnimationView; private Animation mHeadStartAnimation; private Animation mHeadBackAnimation; private Animation mFootStartAnimation; private Animation mFootBackAnimation; private OnLoadingListener mLoadingListener; private View mClickView; private int mClickViewId; private MyClickListener myClickListener; private OnAppItemClickListener mAppClickLitener; private ItemClickLener mItemClickListener; private int mListDataCount;//数据总数 private int mListDataIndex;//数据第一条索引 /*** * 属性说明： * @headView：ListView的HeaderView对应的布局文件 * @footView：ListView的FooterView对应的布局文件 * @isHiddenFooter:boolean类型，默认为ture，是否隐藏底部FooterView * @mClickViewId:当isHiddenFooter值为false的情况下，指定FooterView最外层布局的Id * 作用是：isHiddenFooter为false的情况下只能点击加载，拖动不能加载，通腾讯微博列表 * * @param context * @param attrs */ public AppendList(Context context, AttributeSet attrs) { super(context, attrs); // TODO Auto-generated constructor stub initialize(); TypedArray a = context.obtainStyledAttributes(attrs, styleable.APPList); mHeadResouceId = a.getResourceId(styleable.APPList_headView, 0); mFootResouceId = a.getResourceId(styleable.APPList_footView, 0); isHiddenFooter = a.getBoolean(styleable.APPList_hiddenFooter,true); mClickViewId = a.getResourceId(styleable.APPList_footerClickId,0); initData(context); } private void initialize() { // TODO Auto-generated method stub mHeadView = null; mFootView = null; mHeadHeight = -1; mFootHeight = -1; mHeadResouceId = 0; mFootResouceId = 0; mState = STATE_DONE; mHeadRecard = false; mFootRecard = false; mHeadAnimationView = null; mFootAnimationView = null; mClickView=null; } /** * 初始化数据 * @param context */ private void initData(Context context) { // TODO Auto-generated method stub if (mHeadResouceId != 0) { mHeadView = LayoutInflater.from(context).inflate(mHeadResouceId, null); if (mHeadView != null) { addHeaderView(mHeadView); measureView(mHeadView); mHeadHeight = mHeadView.getMeasuredHeight(); setPaddingTop(mHeadView, -1 * mHeadHeight); } } if (mFootResouceId != 0) { mFootView = LayoutInflater.from(context).inflate(mFootResouceId, null); if (mFootView != null) { addFooterView(mFootView); measureView(mFootView); mFootHeight = mFootView.getMeasuredHeight(); if(!isHiddenFooter){ //添加点击事件 showView(mFootView); if(mClickViewId!=0){ mClickView=(View)findViewById(mClickViewId); mClickView.setClickable(true); myClickListener=new MyClickListener(); mClickView.setOnClickListener(myClickListener); } }else{ setPaddingTop(mFootView, -1 * mFootHeight); } } } setOnScrollListener(this); mItemClickListener=new ItemClickLener(); setOnItemClickListener(mItemClickListener); } private void setPaddingTop(View view, int top) { view.setPadding(0, top, 0, 0); } private void setPadddingBottom(View view,int bottom){ view.setPadding(0,0, 0,bottom); } private void showView(View view) { view.setPadding(0, 0, 0, 0); } @Override public boolean onTouchEvent(MotionEvent ev) { // TODO Auto-generated method stub if (mHeadView == null && mFootView == null) return super.onTouchEvent(ev); switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: if (!mHeadRecard && mDataFirstIndex == 0 && !mFootRecard) { mHeadRecard = true; mFootRecard=false; mStartY = (int) ev.getY(); } if (!mFootRecard && mDataFirstIndex == mDataTotal - mDataViewCount && !mHeadRecard) { mFootRecard = true; mHeadRecard = false; mStartY = (int) ev.getY(); } break; case MotionEvent.ACTION_UP: // 如果不在刷新的时刻 if (mState != STATE_REFRESHING) { // 未达到刷新 if (mState == STATE_INTO_RELESE) { // 修改状态为初始态 mState = STATE_DONE; if(mHeadRecard) changeHeadView(); else if(mFootRecard){ changeFootView(); } } // 进入刷新态 if (mState == STATE_RELEASE_FRESH) { // 修改状态为刷新态 mState = STATE_REFRESHING; if(mHeadRecard) changeHeadView(); else if(mFootRecard){ changeFootView(); } } else { } mHeadRecard = false; mFootRecard=false; } else { } break; case MotionEvent.ACTION_MOVE: int tempY = (int) ev.getY(); if (!mHeadRecard && mDataFirstIndex == 0 && !mFootRecard) { mHeadRecard = true; mFootRecard = false; mStartY = tempY; }