Android-----购物车（包含侧滑删除，商品筛选，商品增加和减少，价格计算，店铺分类等）

 private void showExpandData(){
        cartExpandAdapter=new CartExpandAdapter(this,cartExpandablelistview,cartInfo.getData());
        cartExpandablelistview.setAdapter(cartExpandAdapter);
        int intgroupCount = cartExpandablelistview.getCount();
        for (int i=0; i<intgroupCount; i++)
        {
            cartExpandablelistview.expandGroup(i);
        }
        /**
         * 全选
         */
        cartExpandAdapter.setOnItemClickListener(new OnViewItemClickListener() {
            @Override
            public void onItemClick(boolean isFlang, View view, int position) {
                cartInfo.getData().get(position).setIscheck(isFlang);
                int length=cartInfo.getData().get(position).getItems().size();
                for (int i = 0; i < length; i++) {
                    cartInfo.getData().get(position).getItems().get(i).setIscheck(isFlang);
                }
                cartExpandAdapter.notifyDataSetChanged();
                showCommodityCalculation();
            }
        });

        /**
         * 单选
         */
        cartExpandAdapter.setOnClickListenterModel(new OnClickListenterModel() {
            @Override
            public void onItemClick(boolean isFlang, View view,int onePosition, int position) {
                cartInfo.getData().get(onePosition).getItems().get(position).setIscheck(isFlang);
                int length=cartInfo.getData().get(onePosition).getItems().size();
                for (int i = 0; i < length ; i++) {
                    if (! cartInfo.getData().get(onePosition).getItems().get(i).ischeck()){
                        if (!isFlang){
                            cartInfo.getData().get(onePosition).setIscheck(isFlang);
                        }
                        cartExpandAdapter.notifyDataSetChanged();
                        showCommodityCalculation();
                        return;
                    }else {
                        if (i== ( length-1)){
                            cartInfo.getData().get(onePosition).setIscheck(isFlang);
                            cartExpandAdapter.notifyDataSetChanged();
                        }
                    }
                }
                showCommodityCalculation();
            }
        });
        cartExpandAdapter.setOnClickDeleteListenter(new OnClickDeleteListenter() {
            @Override
            public void onItemClick(View view, int onePosition, int position) {
                Toast.makeText(MainActivity.this,"删除操作",Toast.LENGTH_LONG).show();
            }
        });

        /***
         * 数量增加和减少
         */
        cartExpandAdapter.setOnClickAddCloseListenter(new OnClickAddCloseListenter() {
            @Override
            public void onItemClick(View view, int index, int onePosition, int position,int num) {
                if (index==1){
                    if (num>1) {
                        cartInfo.getData().get(onePosition).getItems().get(position).setNum((num - 1));
                        cartExpandAdapter.notifyDataSetChanged();
                    }
                }else {
                    cartInfo.getData().get(onePosition).getItems().get(position).setNum((num + 1));
                    cartExpandAdapter.notifyDataSetChanged();
                }
                showCommodityCalculation();
            }
        });
       
    }