Android仿淘寶購物車，玩轉電商購物車

時間 2019-12-14

原文原文鏈接

#####前言其實作一個電商購物車，還真不是一個輕鬆的活。可是隻要掌握思路，一步一步來作，就會發現也就這樣。廢物很少說，直接上效果圖完整代碼，github連接，但願能給個星，謝謝git

#####效果圖github

#####主要思路整一個佈局就是ExpandableListView，而後自定義一個ActionBar，ActionBar上面顯示購物車數量，經過ActionBar上面的編輯狀態，店鋪佈局，全部商品佈局，底部佈局要進行相應的變化，編輯狀態下須要改變商品的數量，刪除商品，全選商品，隱藏店鋪的編輯。非編輯狀態能夠顯示店鋪的編輯，顯示結算，商品的信息。經過每個店鋪上面的編輯狀態，該店鋪旗下的全部商品佈局都要進行相應的變化。編輯狀態下，須要改變商品的數量和刪除商品。非編輯狀態下只須要顯示商品的信息。當該店鋪下全部商品都被勾選，對應的店鋪也要被勾選。反之，該店鋪下只要有一個商品沒有被勾選，那麼店鋪就不用勾選。其實邏輯挺簡單的，複雜的邏輯其實就是不少簡單邏輯組成的，咱們只須要把複雜的邏輯簡單化成不少簡單的邏輯，咱們就能完成一個大概的思路數組

#####代碼教學app

咱們第一步要作就是自定義一個ActionBar，幾行代碼就能解決。dom

private void initActionBar() {
    //隱藏標題欄
    if (getSupportActionBar() != null) {
        //去掉陰影
        getSupportActionBar().setElevation(0);
        getSupportActionBar().setDisplayShowTitleEnabled(false);
        getSupportActionBar().setDisplayShowCustomEnabled(true);
        View view = getLayoutInflater().inflate(R.layout.acitonbar, null);
        findView(view);
        getSupportActionBar().setCustomView(view, new ActionBar.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
        ActionBar.LayoutParams lp = (ActionBar.LayoutParams) view.getLayoutParams();
        lp.gravity = Gravity.HORIZONTAL_GRAVITY_MASK | Gravity.CENTER_HORIZONTAL;
        getSupportActionBar().setCustomView(view, lp);
    }
複製代碼

完成以後效果圖:ide

第二步就是寫整個佈局xml文件了，基礎知識也沒有什麼好說的。佈局

完成以後效果圖： ui

第三步就是寫店鋪的xml，商品的xml,商品爲空xml，此處略。

第四步重點講代碼this

ActionBar的編輯按鈕處理

 case R.id.actionBar_edit:
                flag = !flag;
                setActionBarEditor();
                setVisiable();
                break;

 private void setActionBarEditor() {
        for (int i = 0; i < groups.size(); i++) {
            StoreInfo group = groups.get(i);
            if (group.isActionBarEditor()) {
                group.setActionBarEditor(false);
            } else {
                group.setActionBarEditor(true);
            }
        }
        adapter.notifyDataSetChanged();
    }
  private void setVisiable() {
        if (flag) {
            orderInfo.setVisibility(View.GONE);
            shareInfo.setVisibility(View.VISIBLE);
            actionBarEdit.setText("完成");
        } else {
            orderInfo.setVisibility(View.VISIBLE);
            shareInfo.setVisibility(View.GONE);
            actionBarEdit.setText("編輯");
        }
    }

接口回調

checkBox的多選，勾選店鋪，勾選商品的回調spa

    public interface CheckInterface {
       
        void checkGroup(int groupPosition, boolean isChecked);
        void checkChild(int groupPosition, int childPosition, boolean isChecked);
    }

經過監聽checkBox的勾選狀態，便於計算商品金額和刪除商品，計算購物車數量等操做。

店鋪對應的商品的數量增長，減小，刪除，更新的回調

public interface ModifyCountInterface {
        void doIncrease(int groupPosition, int childPosition, View showCountView, boolean isChecked);
        void doDecrease(int groupPosition, int childPosition, View showCountView, boolean isChecked);
        void doUpdate(int groupPosition,int childPosition,View showCountView, boolean isChecked);
        void childDelete(int groupPosition, int childPosition);
    }

經過該店鋪下的商品數量變化，來計算計算金額和購物車數量，當該店鋪的商品刪除完時，便把該店鋪從購物車中刪除掉。

相關購物車的操做

增長商品數量

 @Override
    public void doIncrease(int groupPosition, int childPosition, View showCountView, boolean isChecked) {
        GoodsInfo good = (GoodsInfo) adapter.getChild(groupPosition, childPosition);
        int count = good.getCount();
        count++;
        good.setCount(count);
        ((TextView) showCountView).setText(String.valueOf(count));
        adapter.notifyDataSetChanged();
        calulate();
    }

減小商品數量

 @Override
    public void doDecrease(int groupPosition, int childPosition, View showCountView, boolean isChecked) {
        GoodsInfo good = (GoodsInfo) adapter.getChild(groupPosition, childPosition);
        int count = good.getCount();
        if (count == 1) {
            return;
        }
        count--;
        good.setCount(count);
        ((TextView) showCountView).setText("" + count);
        adapter.notifyDataSetChanged();
        calulate();
    }

刪除商品

@Override
    public void childDelete(int groupPosition, int childPosition) {
        StoreInfo group = groups.get(groupPosition);
        List child = childs.get(group.getId());
        child.remove(childPosition);
        if (child.size() == 0) {
            groups.remove(groupPosition);
        }
        adapter.notifyDataSetChanged();
        calulate();
    }

更新商品數量

 public void doUpdate(int groupPosition, int childPosition, View showCountView, boolean isChecked) {
        GoodsInfo good = (GoodsInfo) adapter.getChild(groupPosition, childPosition);
        int count = good.getCount();
        UtilsLog.i("進行更新數據，數量" + count + "");
        ((TextView) showCountView).setText(String.valueOf(count));
        adapter.notifyDataSetChanged();
        calulate();
    }

勾選店鋪，商品

 @Override
    public void checkChild(int groupPosition, int childPosition, boolean isChecked) {
        boolean allChildSameState = true; //判斷該組下面的全部子元素是否處於同一狀態
        StoreInfo group = groups.get(groupPosition);
        List child = childs.get(group.getId());
        for (int i = 0; i < child.size(); i++) {
            //不選全中
            if (child.get(i).isChoosed() != isChecked) {
                allChildSameState = false;
                break;
            }
        }

        if (allChildSameState) {
            group.setChoosed(isChecked);//若是子元素狀態相同，那麼對應的組元素也設置成這一種的同一狀態
        } else {
            group.setChoosed(false);//不然一概視爲未選中
        }

        if (isCheckAll()) {
            allCheckBox.setChecked(true);//全選
        } else {
            allCheckBox.setChecked(false);//反選
        }

        adapter.notifyDataSetChanged();
        calulate();

    }
 @Override
    public void checkGroup(int groupPosition, boolean isChecked) {
        StoreInfo group = groups.get(groupPosition);
        List child = childs.get(group.getId());
        for (int i = 0; i < child.size(); i++) {
            child.get(i).setChoosed(isChecked);
        }
        if (isCheckAll()) {
            allCheckBox.setChecked(true);//全選
        } else {
            allCheckBox.setChecked(false);//反選
        }
        adapter.notifyDataSetChanged();
        calulate();
    }

底部的遍歷刪除商品

     刪除操做
     1.不要邊遍歷邊刪除,容易出現數組越界的狀況
     2.把將要刪除的對象放進相應的容器中，待遍歷完，用removeAll的方式進行刪除
    private void doDelete() {
        List toBeDeleteGroups = new ArrayList(); 
        //待刪除的組元素
        for (int i = 0; i < groups.size(); i++) {
            StoreInfo group = groups.get(i);
            if (group.isChoosed()) {
                toBeDeleteGroups.add(group);
            }
            List toBeDeleteChilds = new ArrayList();//待刪除的子元素
            List child = childs.get(group.getId());
            for (int j = 0; j < child.size(); j++) {
                if (child.get(j).isChoosed()) {
                    toBeDeleteChilds.add(child.get(j));
                }
            }
            child.removeAll(toBeDeleteChilds);
        }
        groups.removeAll(toBeDeleteGroups);
        //從新設置購物車
        setCartNum();
        adapter.notifyDataSetChanged();
    }

底部的全選商品和反選商品

private boolean isCheckAll() {
        for (StoreInfo group : groups) {
            if (!group.isChoosed()) {
                return false;
            }
        }
        return true;
    }

 private void doCheckAll() {
        for (int i = 0; i < groups.size(); i++) {
            StoreInfo group = groups.get(i);
            group.setChoosed(allCheckBox.isChecked());
            List child = childs.get(group.getId());
            for (int j = 0; j < child.size(); j++) {
                child.get(j).setChoosed(allCheckBox.isChecked());//這裏出現過錯誤
            }
        }
        adapter.notifyDataSetChanged();
        calulate();
    }

計算商品價格

 private void calulate() {
        mtotalPrice = 0.00;
        mtotalCount = 0;
        for (int i = 0; i < groups.size(); i++) {
            StoreInfo group = groups.get(i);
            List child = childs.get(group.getId());
            for (int j = 0; j < child.size(); j++) {
                GoodsInfo good = child.get(j);
                if (good.isChoosed()) {
                    mtotalCount++;
                    mtotalPrice += good.getPrice() * good.getCount();
                }
            }
        }
        totalPrice.setText("￥" + mtotalPrice + "");
        goPay.setText("去支付(" + mtotalCount + ")");
        if (mtotalCount == 0) {
            setCartNum();
        } else {
            shoppingcatNum.setText("購物車(" + mtotalCount + ")");
        }
    }

設置購物車數量和清空購物車

    private void setCartNum() {
        int count = 0;
        for (int i = 0; i < groups.size(); i++) {
            StoreInfo group = groups.get(i);
            group.setChoosed(allCheckBox.isChecked());
            List Childs = childs.get(group.getId());
            for (GoodsInfo childs : Childs) {
                count++;
            }
        }
        //購物車已經清空
        if (count == 0) {
            clearCart();
        } else {
            shoppingcatNum.setText("購物車(" + count + ")");
        }
    }
    private void clearCart() {
        shoppingcatNum.setText("購物車(0)");
        actionBarEdit.setVisibility(View.GONE);
        llCart.setVisibility(View.GONE);
        empty_shopcart.setVisibility(View.VISIBLE);//這裏發生過錯誤
    }

初始化店鋪和商品信息

     *模擬數據

      遵循適配器的數據列表填充原則，組元素被放在一個list中，對應着組元素的下轄子元素被放在Map中
      其Key是組元素的Id
    private void initData() {
        mcontext = this;
        groups = new ArrayList();
        childs = new HashMap>();
        for (int i = 0; i < 5; i++) {
            groups.add(new StoreInfo(i + "", "小馬的第" + (i + 1) + "號當鋪"));
            List goods = new ArrayList<>();
            for (int j = 0; j <= i; j++) {
                int[] img = {R.drawable.cmaz, R.drawable.cmaz, R.drawable.cmaz, R.drawable.cmaz, R.drawable.cmaz, R.drawable.cmaz};
                //i-j 就是商品的id， 對應着第幾個店鋪的第幾個商品，1-1 就是第一個店鋪的第一個商品
                goods.add(new GoodsInfo(i + "-" + j, "商品", groups.get(i).getName() + "的第" + (j + 1) + "個商品", 255.00 + new Random().nextInt(1500), 1555 + new Random().nextInt(3000), "第一排", "出頭天者", img[j], new Random().nextInt(100)));
            }
            childs.put(groups.get(i).getId(), goods);
        }
    }

購物車適配器很少說，直接貼代碼吧。代碼仍是有點多的啊

public class ShopcatAdapter extends BaseExpandableListAdapter {
    private List groups;
    //這個String對應着StoreInfo的Id，也就是店鋪的Id
    private Map> childrens;
    private Context mcontext;
    private CheckInterface checkInterface;
    private ModifyCountInterface modifyCountInterface;
    private GroupEditorListener groupEditorListener;
    private int count = 0;
    private boolean flag=true; //組的編輯按鈕是否可見，true可見，false不可見


    public ShopcatAdapter(List groups, Map> childrens, Context mcontext) {
        this.groups = groups;
        this.childrens = childrens;
        this.mcontext = mcontext;
    }

    @Override
    public int getGroupCount() {
        return groups.size();
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        String groupId = groups.get(groupPosition).getId();
        return childrens.get(groupId).size();
    }

    @Override
    public Object getGroup(int groupPosition) {
        return groups.get(groupPosition);
    }

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        List childs = childrens.get(groups.get(groupPosition).getId());
        return childs.get(childPosition);
    }

    @Override
    public long getGroupId(int groupPosition) {
        return groupPosition;
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return childPosition;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    @Override
    public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        final GroupViewHolder groupViewHolder;
        if (convertView == null) {
            convertView = View.inflate(mcontext, R.layout.item_shopcat_group, null);
            groupViewHolder = new GroupViewHolder(convertView);
            convertView.setTag(groupViewHolder);
        } else {
            groupViewHolder = (GroupViewHolder) convertView.getTag();
        }
        final StoreInfo group = (StoreInfo) getGroup(groupPosition);
        groupViewHolder.storeName.setText(group.getName());
        groupViewHolder.storeCheckBox.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                group.setChoosed(((CheckBox) v).isChecked());
                checkInterface.checkGroup(groupPosition, ((CheckBox) v).isChecked());
            }
        });
        groupViewHolder.storeCheckBox.setChecked(group.isChoosed());

        /**【文字指的是組的按鈕的文字】
         * 當咱們按下ActionBar的 "編輯"按鈕， 應該把全部組的文字顯示"編輯",而且設置按鈕爲不可見
         * 當咱們完成編輯後，再把組的編輯按鈕設置爲可見
         * 不懂，請本身操做淘寶，觀察一遍
         */
        if(group.isActionBarEditor()){
            group.setEditor(false);
            groupViewHolder.storeEdit.setVisibility(View.GONE);
            flag=false;
        }else{
            flag=true;
            groupViewHolder.storeEdit.setVisibility(View.VISIBLE);
        }

        /**
         * 思路:當咱們按下組的"編輯"按鈕後，組處於編輯狀態，文字顯示"完成"
         * 當咱們點擊「完成」按鈕後，文字顯示"編輯「,組處於未編輯狀態
         */
        if (group.isEditor()) {
            groupViewHolder.storeEdit.setText("完成");
        } else {
            groupViewHolder.storeEdit.setText("編輯");
        }

        groupViewHolder.storeEdit.setOnClickListener(new GroupViewClick(group, groupPosition, groupViewHolder.storeEdit));
        return convertView;
    }

    @Override
    public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
        final ChildViewHolder childViewHolder;
        if (convertView == null) {
            convertView = View.inflate(mcontext, R.layout.item_shopcat_product, null);
            childViewHolder = new ChildViewHolder(convertView);
            convertView.setTag(childViewHolder);
        } else {
            childViewHolder = (ChildViewHolder) convertView.getTag();
        }

        /**
         * 根據組的編輯按鈕的可見與不可見，去判斷是組對下轄的子元素編輯  仍是ActionBar對組的下瞎元素的編輯
         * 若是組的編輯按鈕可見，那麼確定是組對本身下轄元素的編輯
         * 若是組的編輯按鈕不可見，那麼確定是ActionBar對組下轄元素的編輯
         */
        if(flag){
            if (groups.get(groupPosition).isEditor()) {
                childViewHolder.editGoodsData.setVisibility(View.VISIBLE);
                childViewHolder.delGoods.setVisibility(View.VISIBLE);
                childViewHolder.goodsData.setVisibility(View.GONE);
            } else {
                childViewHolder.delGoods.setVisibility(View.VISIBLE);
                childViewHolder.goodsData.setVisibility(View.VISIBLE);
                childViewHolder.editGoodsData.setVisibility(View.GONE);
            }
        }else{

            if(groups.get(groupPosition).isActionBarEditor()){
                childViewHolder.delGoods.setVisibility(View.GONE);
                childViewHolder.editGoodsData.setVisibility(View.VISIBLE);
                childViewHolder.goodsData.setVisibility(View.GONE);
            }else{
                childViewHolder.delGoods.setVisibility(View.VISIBLE);
                childViewHolder.goodsData.setVisibility(View.VISIBLE);
                childViewHolder.editGoodsData.setVisibility(View.GONE);
            }
        }

        final GoodsInfo child = (GoodsInfo) getChild(groupPosition, childPosition);
        if (child != null) {
            childViewHolder.goodsName.setText(child.getDesc());
            childViewHolder.goodsPrice.setText("￥" + child.getPrice() + "");
            childViewHolder.goodsNum.setText(String.valueOf(child.getCount()));
            childViewHolder.goodsImage.setImageResource(R.drawable.cmaz);
            childViewHolder.goods_size.setText("門票:" + child.getColor() + ",類型:" + child.getSize());
            //設置打折前的原價
            SpannableString spannableString = new SpannableString("￥" + child.getPrime_price() + "");
            StrikethroughSpan span = new StrikethroughSpan();
            spannableString.setSpan(span,0,spannableString.length()-1+1, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
            //避免無限次的append
            if (childViewHolder.goodsPrimePrice.length() > 0) {
                childViewHolder.goodsPrimePrice.setText("");
            }
            childViewHolder.goodsPrimePrice.setText(spannableString);
            childViewHolder.goodsBuyNum.setText("x" + child.getCount() + "");
            childViewHolder.singleCheckBox.setChecked(child.isChoosed());
            childViewHolder.singleCheckBox.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    child.setChoosed(((CheckBox) v).isChecked());
                    childViewHolder.singleCheckBox.setChecked(((CheckBox) v).isChecked());
                    checkInterface.checkChild(groupPosition, childPosition, ((CheckBox) v).isChecked());
                }
            });
            childViewHolder.increaseGoodsNum.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    modifyCountInterface.doIncrease(groupPosition, childPosition, childViewHolder.goodsNum, childViewHolder.singleCheckBox.isChecked());
                }
            });
            childViewHolder.reduceGoodsNum.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    modifyCountInterface.doDecrease(groupPosition, childPosition, childViewHolder.goodsNum, childViewHolder.singleCheckBox.isChecked());
                }
            });
            childViewHolder.goodsNum.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    showDialog(groupPosition,childPosition,childViewHolder.goodsNum,childViewHolder.singleCheckBox.isChecked(),child);
                }
            });
            childViewHolder.delGoods.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    new AlertDialog.Builder(mcontext)
                            .setMessage("肯定要刪除該商品嗎")
                            .setNegativeButton("取消",null)
                            .setPositiveButton("肯定", new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog, int which) {
                                    modifyCountInterface.childDelete(groupPosition,childPosition);
                                }
                            })
                            .create()
                            .show();;
                }
            });
        }
        return convertView;
    }
    private void showDialog(final int groupPosition, final int childPosition, final View showCountView,final  boolean isChecked, final  GoodsInfo child) {
        final AlertDialog.Builder alertDialog_Builder=new AlertDialog.Builder(mcontext);
        View view= LayoutInflater.from(mcontext).inflate(R.layout.dialog_change_num,null);
        final AlertDialog  dialog=alertDialog_Builder.create();
        dialog.setView(view);
        count=child.getCount();
        final EditText num= (EditText) view.findViewById(R.id.dialog_num);
        num.setText(count+"");
        dialog.setOnShowListener(new DialogInterface.OnShowListener() {
            @Override
            public void onShow(DialogInterface dialog) {
                UtilTool.showKeyboard(mcontext,showCountView);
            }
        });
        final TextView increase= (TextView) view.findViewById(R.id.dialog_increaseNum);
        final TextView DeIncrease=(TextView)view.findViewById(R.id.dialog_reduceNum);
        final TextView pButton= (TextView) view.findViewById(R.id.dialog_Pbutton);
        final TextView nButton= (TextView) view.findViewById(R.id.dialog_Nbutton);
        nButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });
        pButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int number=Integer.parseInt(num.getText().toString().trim());
                if(number==0){
                    dialog.dismiss();
                }else{
                    UtilsLog.i("數量="+number+"");
                    num.setText(String.valueOf(number));
                    child.setCount(number);
               modifyCountInterface.doUpdate(groupPosition,childPosition,showCountView,isChecked);
                 dialog.dismiss();
                }
            }
        });
        increase.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                count++;
                num.setText(String.valueOf(count));
            }
        });
        DeIncrease.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(count>1){
                    count--;
                    num.setText(String.valueOf(count));
                }
            }
        });
        dialog.show();
    }
    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return false;
    }
    public GroupEditorListener getGroupEditorListener() {
        return groupEditorListener;
    }
    public void setGroupEditorListener(GroupEditorListener groupEditorListener) {
        this.groupEditorListener = groupEditorListener;
    }
    public CheckInterface getCheckInterface() {
        return checkInterface;
    }
    public void setCheckInterface(CheckInterface checkInterface) {
        this.checkInterface = checkInterface;
    }
    public ModifyCountInterface getModifyCountInterface() {
        return modifyCountInterface;
    }
    public void setModifyCountInterface(ModifyCountInterface modifyCountInterface) {
        this.modifyCountInterface = modifyCountInterface;
    }
    static class GroupViewHolder {
        @BindView(R.id.store_checkBox)
        CheckBox storeCheckBox;
        @BindView(R.id.store_name)
        TextView storeName;
        @BindView(R.id.store_edit)
        TextView storeEdit;

        public GroupViewHolder(View view) {
            ButterKnife.bind(this, view);
        }
    }
    public interface CheckInterface {
        void checkGroup(int groupPosition, boolean isChecked);
        void checkChild(int groupPosition, int childPosition, boolean isChecked);
    }
        void doIncrease(int groupPosition, int childPosition, View showCountView, boolean isChecked);

        void doDecrease(int groupPosition, int childPosition, View showCountView, boolean isChecked);

        void doUpdate(int groupPosition,int childPosition,View showCountView, boolean isChecked);
        void childDelete(int groupPosition, int childPosition);
    }
    public interface GroupEditorListener {
        void groupEditor(int groupPosition);
    }
    private class GroupViewClick implements View.OnClickListener {
        private StoreInfo group;
        private int groupPosition;
        private TextView editor;

        public GroupViewClick(StoreInfo group, int groupPosition, TextView editor) {
            this.group = group;
            this.groupPosition = groupPosition;
            this.editor = editor;
        }
        @Override
        public void onClick(View v) {
            if (editor.getId() == v.getId()) {
                groupEditorListener.groupEditor(groupPosition);
                if (group.isEditor()) {
                    group.setEditor(false);
                } else {
                    group.setEditor(true);
                }
                notifyDataSetChanged();
            }
        }
    }


    static class ChildViewHolder {
        @BindView(R.id.single_checkBox)
        CheckBox singleCheckBox;
        @BindView(R.id.goods_image)
        ImageView goodsImage;
        @BindView(R.id.goods_name)
        TextView goodsName;
        @BindView(R.id.goods_size)
        TextView goods_size;
        @BindView(R.id.goods_price)
        TextView goodsPrice;
        @BindView(R.id.goods_prime_price)
        TextView goodsPrimePrice;
        @BindView(R.id.goods_buyNum)
        TextView goodsBuyNum;
        @BindView(R.id.goods_data)
        RelativeLayout goodsData;
        @BindView(R.id.reduce_goodsNum)
        TextView reduceGoodsNum;
        @BindView(R.id.goods_Num)
        TextView goodsNum;
        @BindView(R.id.increase_goods_Num)
        TextView increaseGoodsNum;
        @BindView(R.id.goodsSize)
        TextView goodsSize;
        @BindView(R.id.del_goods)
        TextView delGoods;
        @BindView(R.id.edit_goods_data)
        LinearLayout editGoodsData;

        public ChildViewHolder(View view) {
            ButterKnife.bind(this, view);
        }
    }
}

#####總結其實代碼量仍是挺多的，主要的仍是思路。思路理明白了，天然水到渠成。代碼照着打一遍，思路天然明瞭。難點在於店鋪與商品，單選框，編輯按鈕之間的關係處理和佈局的改變。

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