Android LoadMoreExpandableListVi

package com.wenba.bangbang.views; 

import android.content.Context; 
import android.graphics.drawable.Drawable; 
import android.util.AttributeSet; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.AbsListView; 
import android.widget.AbsListView.OnScrollListener; 
import android.widget.ExpandableListView; 
import android.widget.LinearLayout; 
import android.widget.ProgressBar; 
import android.widget.TextView; 

import com.wenba.bangbang.R; 
import com.wenba.comm.BBLog; 

public class LoadMoreExpandableListView extends ExpandableListView implements OnScrollListener { 
 private static final int PRE_LOAD_OFFSET = 2;// 拉到距离底部多少条的时候加载下一页 

 private static final String TAG = "LoadMoreExpandableListView"; 
 private LayoutInflater mInflater; 

 private LinearLayout mLoadMoreView; 
 private ProgressBar mLoadMoreProgress; 
 private TextView mLoadMoreText; 

 private OnLoadMoreListener onLoadMoreListener; 
 private OnScrollListener mOnScrollListener; 

 private int lastTimeFirstVisibleItem = 0; 
 private boolean bIsLoadingMore = false; 
 private boolean bIsAllLoaded = false; 

 private int mCurrentScrollState; 

 /** 
  * @param context 
  * @param attrs 
  */ 
 public LoadMoreExpandableListView(Context context, AttributeSet attrs) { 
 super(context, attrs); 
 init(context); 
 } 

 private void init(Context context) { 
 mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
 mLoadMoreView = (LinearLayout) mInflater.inflate(R.layout.pull_to_load_footer, this, false); 
 mLoadMoreProgress = (ProgressBar) mLoadMoreView.findViewById(R.id.skin_pull_to_load_progress); 
 mLoadMoreText = (TextView) mLoadMoreView.findViewById(R.id.skin_pull_to_load_text); 

 addFooterView(mLoadMoreView); 
 measureView(mLoadMoreView); 

 mLoadMoreView.setOnClickListener(null); 
 super.setOnScrollListener(this); 
 } 

 private void measureView(View child) { 
 ViewGroup.LayoutParams p = child.getLayoutParams(); 
 if (p == null) { 
 p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); 
 } 

 int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0, p.width); 
 int lpHeight = p.height; 
 int childHeightSpec; 
 if (lpHeight > 0) { 
 childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY); 
 } else { 
 childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); 
 } 
 child.measure(childWidthSpec, childHeightSpec); 
 } 

 private void onLoadMore() { 
 BBLog.d(TAG, "onLoadMore"); 
 if (onLoadMoreListener != null) { 
 onLoadMoreListener.onLoadMore(); 
 mLoadMoreView.setVisibility(View.VISIBLE); 
 mLoadMoreProgress.setVisibility(View.VISIBLE); 
 mLoadMoreText.setText("正在加载..."); 
 } 
 } 

 public void onLoadMoreComplete() { 
 BBLog.d(TAG, "onLoadMoreComplete"); 
 bIsLoadingMore = false; 
 mLoadMoreView.setVisibility(View.GONE); 
 // mLoadMoreProgress.setVisibility(View.GONE); 
 // mLoadMoreText.setText("加载完成"); 
 } 

 public void onLoadFail() { 
 BBLog.d(TAG, "loadFail"); 
 bIsLoadingMore = false; 
 mLoadMoreView.setVisibility(View.GONE); 
 // mLoadMoreProgress.setVisibility(View.GONE); 
 // mLoadMoreText.setText("加载失败"); 
 } 

 public void onAllLoaded() { 
 BBLog.d(TAG, "onAllLoaded"); 
 bIsLoadingMore = false; 
 bIsAllLoaded = true; 
 mLoadMoreView.setVisibility(View.VISIBLE); 
 mLoadMoreProgress.setVisibility(View.GONE); 
 mLoadMoreText.setVisibility(View.VISIBLE); 
 // mLoadMoreText.setText("没有更多了"); 
 } 

 public void setLoadMoreTextColor(int color) { 
 if (mLoadMoreText != null) { 
 mLoadMoreText.setTextColor(color); 
 } 
 } 

 public void setLoadMoreProgressDrawable(Drawable drawable) { 
 if (mLoadMoreProgress != null) { 
 mLoadMoreProgress.setIndeterminateDrawable(drawable); 
 } 
 } 

 /** 
  * @return the onLoadMoreListener 
  */ 
 public OnLoadMoreListener getOnLoadMoreListener() { 
 return onLoadMoreListener; 
 } 

 /** 
  * @param onLoadMoreListener 
  *            the onLoadMoreListener to set 
  */ 
 public void setOnLoadMoreListener(OnLoadMoreListener onLoadMoreListener) { 
 this.onLoadMoreListener = onLoadMoreListener; 
 } 

 /** 
  * @return the bHasMore 
  */ 
 public boolean isAllLoaded() { 
 return bIsAllLoaded; 
 } 

 /** 
  * @param bHasMore 
  *            the bHasMore to set 
  */ 
 public void setIsAllLoaded(boolean isAllLoaded) { 
 this.bIsAllLoaded = isAllLoaded; 
 } 

 @Override 
 public void setOnScrollListener(AbsListView.OnScrollListener l) { 
 mOnScrollListener = l; 
 } 

 @Override 
 public void onScrollStateChanged(AbsListView view, int scrollState) { 
 // TODO Auto-generated method stub 
 mCurrentScrollState = scrollState; 

 if (mOnScrollListener != null) { 
 mOnScrollListener.onScrollStateChanged(view, scrollState); 
 } 
 } 

 @Override 
 public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { 
 if (firstVisibleItem > lastTimeFirstVisibleItem) { 
 if (!bIsLoadingMore && !bIsAllLoaded && (firstVisibleItem + visibleItemCount >= totalItemCount - PRE_LOAD_OFFSET) 
 && mCurrentScrollState != SCROLL_STATE_IDLE) { 
 bIsLoadingMore = true; 
 BBLog.d(TAG, "loadmore"); 
 onLoadMore(); 
 } 
 if (bIsAllLoaded && (firstVisibleItem + visibleItemCount >= totalItemCount - PRE_LOAD_OFFSET) && mCurrentScrollState != SCROLL_STATE_IDLE) { 
 onAllLoaded(); 
 } 

 } 
 lastTimeFirstVisibleItem = firstVisibleItem; 

 if (mOnScrollListener != null) { 
 mOnScrollListener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount); 
 } 
 } 

 public interface OnLoadMoreListener { 

 public void onLoadMore(); 
 } 
} 

public void onResponse(BBObject response) {
 if (response != null) {
 if (response.isSuccess()) {
 PurchaseRecordListBean purchaseRecordListBean = (PurchaseRecordListBean) response;
 List<PurchaseRecordListItemBean> purchaseRecordList = null;
 if (purchaseRecordListBean != null) {
 purchaseRecordList = purchaseRecordListBean.getList();
 }
 if (curPage == 1) {
 mPurchaseRecordListView.setIsAllLoaded(false);
 if (purchaseRecordList != null && purchaseRecordList.size() > 0) {
 lists.clear();
 lists.addAll(purchaseRecordList);
 mPurchaseRecordListView.setVisibility(View.VISIBLE);
 noRecordLayout.setVisibility(View.GONE);
 mPurchaseRecordAdapter.setDataList(lists);
 if (mPurchaseRecordListView.getAdapter() == null) {
 mPurchaseRecordListView.setAdapter(mPurchaseRecordAdapter);
 for (int i = 0; i < mPurchaseRecordAdapter.getGroupCount(); i++) {
 mPurchaseRecordListView.expandGroup(i);
 }
 } else {
 mPurchaseRecordAdapter.notifyDataSetChanged();
 }
 mPurchaseRecordListView.setSelection(0);
 curPage++;
 } else {
 lists.clear();
 noRecordLayout.setVisibility(View.VISIBLE);
 mPurchaseRecordListView.setVisibility(View.GONE);
 }
 } else {
 if (purchaseRecordList != null && purchaseRecordList.size() >= 0) {
 lists.addAll(purchaseRecordList);
 mPurchaseRecordListView.setIsAllLoaded(false);
 mPurchaseRecordListView.onLoadMoreComplete();
 mPurchaseRecordAdapter.setDataList(lists);
 curPage++;
 if (purchaseRecordList.size() < PAGE_SIZE_LIMIT) {
 mPurchaseRecordListView.onAllLoaded();
 }
 } else {
 mPurchaseRecordListView.onAllLoaded();
 }
 }
 } else {
 APPUtil.showToast(getApplicationContext(), response.getMsg());
 }
 }
 }