效果与系统的联系人分组效果类似，组头有挤压效果。但是不同的是，SectionListView支持每组的组头布局自定义，每组的内容布局也可以自定义。
效果图如下：
自定义Adapter：
package com.hiphonezhu.demo.lib;import java.util.HashMap;import java.util.Map;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;/*** 带分组功能的Adapter* @author hiphonezhu@* @version [TestAndroid, -2-16]*/public abstract class SectionAdapter extends BaseAdapter{private Map<Integer, Integer> sectionPositionMap; // 存储分组编号及对应的改组内的条目数量private Map<Integer, Integer> sectionForPositionMap = new HashMap<Integer, Integer>(); // 存储position对应的分组编号private Map<Integer, Integer> positionForSectionMap = new HashMap<Integer, Integer>(); // 存储分组编号对应的第一个出现的positon位置public SectionAdapter(Map<Integer, Integer> sectionPositionMap){this.sectionPositionMap = sectionPositionMap;// 初始化Position与Section对应关系数据int sectionSize = sectionPositionMap != null? sectionPositionMap.size() : 0;int position = 0;for(int i = 0; i < sectionSize; i++){int size = sectionPositionMap.get(i) != null? sectionPositionMap.get(i) : 0;for(int j = 0; j < size; j++){if (!positionForSectionMap.containsKey(i)){positionForSectionMap.put(i, position);}sectionForPositionMap.put(position, i);position++;}}}@Overridepublic View getView(int position, View convertView, ViewGroup parent){int type = getItemViewType(position);return getView(type, position, convertView, parent);}/*** 加载每一行的View* @param section 分组编号* @param position* @param convertView* @param parent* @return*/protected abstract View getView(int section, int position, View convertView, ViewGroup parent);/*** 根据position返回item的样式(每个分组一种样式)* @param position* @return* @see android.widget.BaseAdapter#getItemViewType(int)*/@Overridepublic int getItemViewType(int position){return getSectionForPosition(position);}/*** 返回样式的总共数量(总计多少分组就多少个样式)* @return* @see android.widget.BaseAdapter#getViewTypeCount()*/@Overridepublic int getViewTypeCount(){return getSectionCount();}@Overridepublic int getCount(){int sectionCount = getSectionCount();int sectionItemTotalCount = 0;for(int i=0; i<sectionCount; i++){sectionItemTotalCount += getCountForSection(i);}return sectionItemTotalCount;}/*** 判断当前行是否要显示分组信息* @param position 下标* @return*/public boolean sectionVisible(int position){int section = getSectionForPosition(position);return position == getPositionForSection(section);}/*** 根据分组号加载分组View* @param section* @return*/public abstract View getSectionView(int section);/*** 根据下标位置查询分组编号* @param position 下标* @return*/public int getSectionForPosition(int position){if (!sectionForPositionMap.containsKey(position)){return -1;}return sectionForPositionMap.get(position);}/*** 根据分组号查找第一个下标位置* @param section 分组编号* @return*/public int getPositionForSection(int section){if (!positionForSectionMap.containsKey(section)){return -1;}return positionForSectionMap.get(section);}/*** 返回分组数量* @return*/protected int getSectionCount(){return sectionPositionMap != null? sectionPositionMap.size() : 0;}/*** 返回指定分组中的item数目* @param section 分组编号* @return*/protected int getCountForSection(int section){return sectionPositionMap != null? (sectionPositionMap.get(section) != null? sectionPositionMap.get(section) : 0) : 0;}}
自定义ListView：
package com.hiphonezhu.demo.lib;import java.util.HashMap;import java.util.Map;import android.content.Context;import android.util.AttributeSet;import android.view.View;import android.view.ViewGroup;import android.widget.AbsListView;import android.widget.ListView;/*** 带分组表头的ListView* @author hiphonezhu@* @version [TestAndroid, -2-16]*/public class SectionListView extends ListView{private SectionAdapter sectionAdapter;private ViewGroup sectionContainer;public SectionListView(Context context, AttributeSet attrs, int defStyle){super(context, attrs, defStyle);}public SectionListView(Context context, AttributeSet attrs){super(context, attrs);}public SectionListView(Context context){super(context);}/*** 绑定数据适配器* @param sectionAdapter* @param sectionContainer*/public void setAdapter(SectionAdapter sectionAdapter, ViewGroup sectionContainer){super.setAdapter(sectionAdapter);this.sectionAdapter = sectionAdapter;this.sectionContainer = sectionContainer;setOnScrollListener(scrollListener);}private OnScrollListener scrollListener = new OnScrollListener(){private int lastFirstVisibleItem = -1; final Map<Integer, View> sectionViewMap = new HashMap<Integer, View>();@Overridepublic void onScrollStateChanged(AbsListView paramAbsListView, int paramInt){}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount){int section = sectionAdapter.getSectionForPosition(firstVisibleItem);int nextSecPosition = sectionAdapter.getPositionForSection(section + 1); View sectionView = sectionViewMap.get(section);if (sectionView == null){sectionView = sectionAdapter.getSectionView(section);sectionViewMap.put(section, sectionView);sectionContainer.addView(sectionView);}else{int count = sectionContainer.getChildCount();for(int i = 0; i < count; i++){if (sectionContainer.getChildAt(i) != sectionView){sectionContainer.getChildAt(i).setVisibility(View.GONE);}else{sectionContainer.getChildAt(i).setVisibility(View.VISIBLE);}}}if (firstVisibleItem != lastFirstVisibleItem) { MarginLayoutParams params = (MarginLayoutParams) sectionContainer.getLayoutParams(); params.topMargin = 0; sectionContainer.setLayoutParams(params); } if (nextSecPosition - firstVisibleItem < visibleItemCount) // 下一个分组在当前屏幕可见范围{// 下一个分组的ViewView childView = view.getChildAt(nextSecPosition - firstVisibleItem); if (childView != null) { int titleHeight = sectionContainer.getHeight(); int top = childView.getTop(); MarginLayoutParams params = (MarginLayoutParams) sectionContainer .getLayoutParams(); if (top < titleHeight) { float pushedDistance = top - titleHeight; params.topMargin = (int) pushedDistance; sectionContainer.setLayoutParams(params); } else { if (params.topMargin != 0) { params.topMargin = 0; sectionContainer.setLayoutParams(params); } } } }lastFirstVisibleItem = firstVisibleItem; }};}
源码下载地址：/hiphonezhu/SectionListView
