<se.emilsjolander.stickylistheaders.StickyListHeadersListView
  android:layout_width="match_parent"
  android:background="#fff"
  android:id="@+id/itemListView"
  android:layout_height="match_parent">
 </se.emilsjolander.stickylistheaders.StickyListHeadersListView>

 View getHeaderView(int position, View convertView, ViewGroup parent);

 long getHeaderId(int position);

public void setAreHeadersSticky(boolean areHeadersSticky);
public boolean areHeadersSticky();

public void setOnHeaderClickListener(OnHeaderClickListener listener);

public interface OnHeaderClickListener {
 public void onHeaderClick(StickyListHeadersListView l, View header, int itemPosition, long headerId, boolean currentlySticky);
}

public void setOnStickyHeaderChangedListener(OnStickyHeaderChangedListener listener);

public interface OnStickyHeaderChangedListener {
 void onStickyHeaderChanged(StickyListHeadersListView l, View header, int itemPosition, long headerId);
}

public View getListChildAt(int index);
public int getListChildCount();

 listView.setOnScrollListener(new AbsListView.OnScrollListener() {
   @Override
   public void onScrollStateChanged(AbsListView view, int scrollState) {

   }

   @Override
   public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
   //根据firstVisibleItem获取分类ID，根据分类id获取左侧要选中的位置
    GoodsItem item = dataList.get(firstVisibleItem);
    if(typeAdapter.selectTypeId != item.typeId) {
     typeAdapter.selectTypeId = item.typeId;
     typeAdapter.notifyDataSetChanged();
     //左侧列表是个RecyclerView 所以使用smoothScrollToPosition(int position) 使当对应position的item可以滚动显示出来
     rvType.smoothScrollToPosition(int position)(getSelectedGroupPosition(item.typeId));
    }
   }
  });

 //显示减号的动画
 private Animation getShowAnimation(){
  AnimationSet set = new AnimationSet(true);
  RotateAnimation rotate = new RotateAnimation(0,720,RotateAnimation.RELATIVE_TO_SELF,0.5f,RotateAnimation.RELATIVE_TO_SELF,0.5f);
  set.addAnimation(rotate);
  TranslateAnimation translate = new TranslateAnimation(
    TranslateAnimation.RELATIVE_TO_SELF,2f
    ,TranslateAnimation.RELATIVE_TO_SELF,0
    ,TranslateAnimation.RELATIVE_TO_SELF,0
    ,TranslateAnimation.RELATIVE_TO_SELF,0);
  set.addAnimation(translate);
  AlphaAnimation alpha = new AlphaAnimation(0,1);
  set.addAnimation(alpha);
  set.setDuration(500);
  return set;
 }
 //隐藏减号的动画
 private Animation getHiddenAnimation(){
  AnimationSet set = new AnimationSet(true);
  RotateAnimation rotate = new RotateAnimation(0,720,RotateAnimation.RELATIVE_TO_SELF,0.5f,RotateAnimation.RELATIVE_TO_SELF,0.5f);
  set.addAnimation(rotate);
  TranslateAnimation translate = new TranslateAnimation(
    TranslateAnimation.RELATIVE_TO_SELF,0
    ,TranslateAnimation.RELATIVE_TO_SELF,2f
    ,TranslateAnimation.RELATIVE_TO_SELF,0
    ,TranslateAnimation.RELATIVE_TO_SELF,0);
  set.addAnimation(translate);
  AlphaAnimation alpha = new AlphaAnimation(1,0);
  set.addAnimation(alpha);
  set.setDuration(500);
  return set;
 }

 //执行动画 只需给对应控件setAnimation然后调用setVisibility方法即可
 {
  ....
  tvMinus.setAnimation(getHiddenAnimation());
  tvMinus.setVisibility(View.GONE);
 }

 int[] loc = new int[2];
 v.getLocationInWindow(loc);
 activity.playAnimation(loc);

 public void playAnimation(int[] start_location){
  ImageView img = new ImageView(this);
  img.setImageResource(R.drawable.button_add);
  setAnim(img,start_location);
 }
 //创建动画 平移动画直接传递偏移量 
 private Animation createAnim(int startX,int startY){
  int[] des = new int[2];
  imgCart.getLocationInWindow(des);

  AnimationSet set = new AnimationSet(false);

  Animation translationX = new TranslateAnimation(0, des[0]-startX, 0, 0);
  //线性插值器 默认就是线性
  translationX.setInterpolator(new LinearInterpolator());
  Animation translationY = new TranslateAnimation(0, 0, 0, des[1]-startY);
  //设置加速插值器
  translationY.setInterpolator(new AccelerateInterpolator());
  Animation alpha = new AlphaAnimation(1,0.5f);
  set.addAnimation(translationX);
  set.addAnimation(translationY);
  set.addAnimation(alpha);
  set.setDuration(500);

  return set;
 }
 //计算动画view在根部局中的坐标 添加到根部局中
 private void addViewToAnimLayout(final ViewGroup vg, final View view,
          int[] location) {

  int x = location[0];
  int y = location[1];
  int[] loc = new int[2];
  vg.getLocationInWindow(loc);
  view.setX(x);
  view.setY(y-loc[1]);
  vg.addView(view);
 }
 //设置动画结束移除动画view 
 private void setAnim(final View v, int[] start_location) {

  addViewToAnimLayout(anim_mask_layout, v, start_location);
  Animation set = createAnim(start_location[0],start_location[1]);
  set.setAnimationListener(new Animation.AnimationListener() {
   @Override
   public void onAnimationStart(Animation animation) {

   }

   @Override
   public void onAnimationEnd(final Animation animation) {
    //直接remove可能会因为界面仍在绘制中成而报错
    mHanlder.postDelayed(new Runnable() {
     @Override
     public void run() {
      anim_mask_layout.removeView(v);
     }
    },100);
   }

   @Override
   public void onAnimationRepeat(Animation animation) {

   }
  });
  v.startAnimation(set);
 }

<com.flipboard.bottomsheet.BottomSheetLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/bottomSheetLayout"
 android:layout_width="match_parent"
 android:layout_height="match_parent">
 <LinearLayout
  android:orientation="horizontal"
  android:layout_width="match_parent"
  android:layout_height="match_parent">

  <android.support.v7.widget.RecyclerView
   android:layout_width="100dp"
   android:id="@+id/typeRecyclerView"
   android:layout_height="match_parent">
  </android.support.v7.widget.RecyclerView>

  <se.emilsjolander.stickylistheaders.StickyListHeadersListView
   android:layout_width="match_parent"
   android:background="#fff"
   android:id="@+id/itemListView"
   android:layout_height="match_parent">
  </se.emilsjolander.stickylistheaders.StickyListHeadersListView>
 </LinearLayout>
</com.flipboard.bottomsheet.BottomSheetLayout>

 //弹出View bottomSheet即是要弹出的view
 bottomSheetLayout.showWithSheetView(bottomSheet);

 //代码隐藏view (点击弹出view以外的地方可以隐藏弹出的view，向下滑动也可以）
 bottomSheetLayout.dismissSheet();

 //商品列表
 private ArrayList<GoodsItem> dataList;
 //分类列表
 private ArrayList<GoodsItem> typeList;
 //已选择的商品
 private SparseArray<GoodsItem> selectedList;
 //用于记录每个分组选择的数目
 private SparseIntArray groupSelect;

 /**
  * Item代表商品的购买数量加一
  * @param item
  * @param refreshGoodList 是否刷新商品list
  */
 public void add(GoodsItem item,boolean refreshGoodList){

  int groupCount = groupSelect.get(item.typeId);
  if(groupCount==0){
   groupSelect.append(item.typeId,1);
  }else{
   groupSelect.append(item.typeId,++groupCount);
  }

  GoodsItem temp = selectedList.get(item.id);
  if(temp==null){
   item.count=1;
   selectedList.append(item.id,item);
  }else{
   temp.count++;
  }
  update(refreshGoodList);
 }
 /**
  * Item商品的购买数量减一
  * @param item
  * @param refreshGoodList 是否刷新商品list
  */
 public void remove(GoodsItem item,boolean refreshGoodList){

  int groupCount = groupSelect.get(item.typeId);
  if(groupCount==1){
   groupSelect.delete(item.typeId);
  }else if(groupCount>1){
   groupSelect.append(item.typeId,--groupCount);
  }

  GoodsItem temp = selectedList.get(item.id);
  if(temp!=null){
   if(temp.count<2){
    selectedList.remove(item.id);
   }else{
    item.count--;
   }
  }
  update(refreshGoodList);
 }

 /**
  * 刷新界面 总价、购买数量等
  * @param refreshGoodList 是否刷新商品list
  */
 private void update(boolean refreshGoodList){
  ...
 }

 //根据商品id获取当前商品的采购数量
 public int getSelectedItemCountById(int id){
  GoodsItem temp = selectedList.get(id);
  if(temp==null){
   return 0;
  }
  return temp.count;
 }
 //根据类别Id获取属于当前类别的数量
 public int getSelectedGroupCountByTypeId(int typeId){
  return groupSelect.get(typeId);
 }