Android商城項目

實現邏輯：

   選擇商品的按鈕的監聽器不要設置成onChickChangeListener，選中商品後先回調商品的價格並顯示到界面並判斷是否是該店鋪下的商品是否都被選中，如果是也選中該店鋪，同時也判斷是否該購物車中的店鋪是否全部被選中，如果是，則回調選中全選按鈕。

商城源碼下載地址：http://www.devstore.cn/code/info/1795.html

 

購物車adapter代碼如下：

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.oiios.suibian.R;
import com.oiios.suibian.bean.ShopCarBean;
import com.oiios.suibian.bean.StoreBean;
import com.oiios.suibian.listener.ShopCarChangedListener;
import com.oiios.suibian.model.BmobManager;
import com.oiios.suibian.utils.HttpUtil;

import android.content.Context;
import android.graphics.Paint;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

/**
 * 因爲沒有抓取到店鋪id，所以這裏採用店鋪名作爲唯一鍵
 */
public class ShopCarAdapter extends BaseExpandableListAdapter {
    private List<StoreBean> groupList; // 店鋪信息
    private Map<String, List<ShopCarBean>> childMap;// 店鋪名作爲key值
    private Context context;
    private ShopCarChangedListener listener;

    public ShopCarAdapter(Context context, ShopCarChangedListener listener) {
        super();
        this.groupList = new ArrayList<StoreBean>();
        this.childMap = new HashMap<String, List<ShopCarBean>>();
        this.context = context;
        this.listener = listener;
    }

    public void addChild(String key, List<ShopCarBean> list) {
        childMap.put(key, list);
        notifyDataSetChanged();
    }

    public void addChildAll(Map<String, List<ShopCarBean>> map, boolean flag) {
        if (flag) {
            childMap.clear();
        }
        childMap.putAll(map);
        notifyDataSetChanged();
    }

    public void addGroupAll(List<StoreBean> list, boolean flag) {
        if (flag) {
            groupList.clear();
        }
        groupList.addAll(list);
        notifyDataSetChanged();
    }

    public void addGroup(StoreBean entity) {
        groupList.add(entity);
        notifyDataSetChanged();
    }

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

    @Override
    public int getChildrenCount(int groupPosition) {
        return childMap.get(groupList.get(groupPosition).getStoreName()).size();
    }

    @Override
    public StoreBean getGroup(int groupPosition) {
        return groupList.get(groupPosition);
    }

    @Override
    public ShopCarBean getChild(int groupPosition, int childPosition) {
        return childMap.get(groupList.get(groupPosition).getStoreName()).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(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        GroupHolder holder;
        if (convertView == null) {
            holder = new GroupHolder();
            convertView = View.inflate(context, R.layout.inflate_shop_car_group, null);
            holder.cbGroup = (CheckBox) convertView.findViewById(R.id.cbStore);
            holder.tvStoreName = (TextView) convertView.findViewById(R.id.tvStoreName);
            holder.ivStorePhoto = (ImageView) convertView.findViewById(R.id.ivStoreIcon);
            holder.cbEdit = (CheckBox) convertView.findViewById(R.id.cbEdit);
            convertView.setTag(holder);
        } else {
            holder = (GroupHolder) convertView.getTag();
        }
        final StoreBean bean = getGroup(groupPosition);
        // 通過getStoreState來改變店鋪的選中狀態
        holder.cbGroup.setChecked(bean.isChecked());
        holder.cbGroup.setOnClickListener(new MyOnClickListener(bean));
        holder.tvStoreName.setText(bean.getStoreName());
        holder.cbEdit.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                boolean flag = ((CheckBox) v).isChecked();
                if (flag) {
                    flag = true;
                    ((CheckBox) v).setText("完成");
                } else {
                    ((CheckBox) v).setText("編輯");
                }
                bean.setEditState(flag);
                notifyDataSetChanged();
            }
        });
        return convertView;
    }

    ChildHolder childHolder;

    @Override
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView,
            ViewGroup parent) {
        if (convertView == null) {
            childHolder = new ChildHolder();
            convertView = View.inflate(context, R.layout.inflate_shop_car_child, null);
            childHolder.cbChild = (CheckBox) convertView.findViewById(R.id.cbGoods);
            childHolder.ivGoodsPhoto = (ImageView) convertView.findViewById(R.id.ivGoodsIcon);
            childHolder.tvDescribe = (TextView) convertView.findViewById(R.id.tvGoodsDescribe);
            childHolder.tvNowPrice = (TextView) convertView.findViewById(R.id.tvNowPrice);
            childHolder.tvOldPrice = (TextView) convertView.findViewById(R.id.tvOldPrice);
            childHolder.tvCount = (TextView) convertView.findViewById(R.id.tvCount);
            childHolder.tvCount2 = (TextView) convertView.findViewById(R.id.tvCount2);
            childHolder.tvAdd = (TextView) convertView.findViewById(R.id.tvAdd);
            childHolder.tvSub = (TextView) convertView.findViewById(R.id.tvSub);
            childHolder.btnDelete = (TextView) convertView.findViewById(R.id.btnDelete);
            childHolder.layoutCount = (LinearLayout) convertView.findViewById(R.id.layoutCount);
            childHolder.layoutContent = (RelativeLayout) convertView.findViewById(R.id.layoutContent);
            convertView.setTag(childHolder);
        } else {
            childHolder = (ChildHolder) convertView.getTag();
        }
        StoreBean storeBean = getGroup(groupPosition);
        ShopCarBean bean = getChild(groupPosition, childPosition);
        childHolder.cbChild.setChecked(bean.isChecked());
        childHolder.cbChild.setOnClickListener(new MyOnClickListener(getGroup(groupPosition), bean));
        HttpUtil.displayImage(bean.getImgUrl(), childHolder.ivGoodsPhoto);
        childHolder.tvCount.setText("x" + bean.getGoodsCount());
        childHolder.tvCount2.setText(bean.getGoodsCount() + "");
        childHolder.tvNowPrice.setText("￥ " + bean.getNowPrice());
        childHolder.tvDescribe.setText(bean.getDescible());
        EditOnClickListener editOnClickListener = new EditOnClickListener(groupPosition, childPosition);
        // 刪除
        childHolder.btnDelete.setOnClickListener(editOnClickListener);
        childHolder.tvAdd.setOnClickListener(editOnClickListener);
        childHolder.tvSub.setOnClickListener(editOnClickListener);
        if (!String.valueOf(bean.getOldPrice()).equals("")) {
            childHolder.tvOldPrice.setText("￥ " + bean.getOldPrice() + " ");
            // 中部劃線
            childHolder.tvOldPrice.getPaint().setFlags(Paint.STRIKE_THRU_TEXT_FLAG | Paint.ANTI_ALIAS_FLAG);
        } else {
            childHolder.tvOldPrice.setVisibility(View.GONE);
        }
        childHolder.tvDescribe.setText(bean.getDescible());

        if (!storeBean.isEditState()) {// 沒有點擊編輯時
            childHolder.layoutContent.setVisibility(View.VISIBLE);
            childHolder.layoutCount.setVisibility(View.GONE);
            childHolder.btnDelete.setVisibility(View.GONE);
        } else {// 點擊編輯時
            childHolder.layoutContent.setVisibility(View.GONE);
            childHolder.layoutCount.setVisibility(View.VISIBLE);
            childHolder.btnDelete.setVisibility(View.VISIBLE);
        }
        return convertView;
    }

    boolean flag = false;

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }

    // 編輯
    private class EditOnClickListener implements OnClickListener {
        private int groupPosition;
        private int childPosition;
        private ShopCarBean bean;

        public EditOnClickListener(int groupPosition, int childPosition) {
            bean = getChild(groupPosition, childPosition);
            this.childPosition = childPosition;
            this.groupPosition = groupPosition;
        }

        @Override
        public void onClick(View v) {
            switch (v.getId()) {
            case R.id.tvAdd:
                int count = bean.getGoodsCount() + 1;
                bean.setGoodsCount(count);
                childHolder.tvCount2.setText(count + "");
                notifyDataSetChanged();
                BmobManager.updateGoodsCount(bean,listener);
                break;
            case R.id.tvSub:
                int count2 = bean.getGoodsCount();
                if (count2 >= 1) {
                    count2 -= 1;
                    childHolder.tvCount2.setClickable(true);
                } else {
                    childHolder.tvCount2.setClickable(false);
                }
                bean.setGoodsCount(count2);
                childHolder.tvCount2.setText(count2 + "");
                notifyDataSetChanged();
                BmobManager.updateGoodsCount(bean,listener);
                break;
            case R.id.btnDelete:
                listener.removeCarGoods(groupPosition, childPosition);
                break;
            }
        }
    }

    public void removeChild(int groupPosition, int childPosition) {
        List<ShopCarBean> list = childMap.get(groupList.get(groupPosition).getStoreName());
        list.remove(childPosition);
        if (list.size() == 0) {
            groupList.remove(groupPosition);
        }
        notifyDataSetChanged();
    }

    public void removeAll() {
        childMap.clear();
        groupList.clear();
        notifyDataSetChanged();
    }

    // 點擊checkbox時調用
    private class MyOnClickListener implements OnClickListener {
        private StoreBean storeBean;
        private ShopCarBean goodsBean;

        public MyOnClickListener(StoreBean storeBean) {
            this.storeBean = storeBean;
        }

        public MyOnClickListener(StoreBean storeBean, ShopCarBean goodsBean) {
            this(storeBean);
            this.goodsBean = goodsBean;
        }

        @Override
        public void onClick(View v) {
            // 得到checkbox的選中狀態（false未選中）
            boolean flag = ((CheckBox) v).isChecked();
            switch (v.getId()) {
            case R.id.cbStore:
                storeBean.setChecked(flag);
                // flag = true:選中該店鋪下的所有商品
                selectGoodsAll(storeBean, flag);
                if (flag) {
                    // 如果店鋪全部選中則回調checkedStoreAll，使全選的checkbox爲選中狀態
                    if (isCheckedGroupAll()) {
                        listener.checkedStoreAll(true);
                    }
                } else {
                    listener.checkedStoreAll(false);
                }
                break;
            case R.id.cbGoods:
                selectGoods(storeBean, goodsBean, flag);
                break;
            case R.id.cbEdit:
                break;
            }
        }
    }

    // 判斷該店鋪下的商品是否全部選中
    private boolean isCheckedChildAll(String storeName) {
        boolean flag = true;
        List<ShopCarBean> list = childMap.get(storeName);
        for (ShopCarBean shopCarBean : list) {
            if (!shopCarBean.isChecked()) {
                flag = false;
                break;
            }
        }
        return flag;
    }

    // 是否所有店鋪都被選中
    public boolean isCheckedGroupAll() {
        boolean flag = true;
        for (StoreBean storeBean : groupList) {
            if (!storeBean.isChecked()) {
                flag = false;
                break;
            }
        }
        return flag;
    }

    // 根據店鋪id選中該店鋪全部商品
    public void selectGoodsAll(StoreBean storeBean, boolean state) {
        List<ShopCarBean> list = childMap.get(storeBean.getStoreName());
        for (ShopCarBean shopCarEntity : list) {
            selectGoods(storeBean, shopCarEntity, state);
        }
        notifyDataSetChanged();
    }

    // 選中所有的店鋪
    public void selectStoreAll(boolean storeState) {
        for (int i = 0; i < getGroupCount(); i++) {
            StoreBean entity = getGroup(i);
            entity.setChecked(storeState);
            selectGoodsAll(entity, storeState);
        }
    }

    int freight = 0;
    // 計算選中商品的價格
    public void queryCheckedGoods() {
        float money = 0.0f;
        for (StoreBean storeBean : groupList) {
            for (ShopCarBean shopCarBean : childMap.get(storeBean.getStoreName())) {
                if (shopCarBean.isChecked()) {
                    money += shopCarBean.getNowPrice() * shopCarBean.getGoodsCount();
                }
            }
        }
        listener.moneyChange(money, freight);
    }

    // 選中某一件商品
    public void selectGoods(StoreBean storeBean, ShopCarBean goodsBean, boolean state) {
        // 保存商品之前的狀態
        goodsBean.setChecked(state);
        // 如果所有的孩子都選中，那店鋪也應該選中
        if (isCheckedChildAll(goodsBean.getStoreName())) {
            storeBean.setChecked(true);
            if (isCheckedGroupAll()) {
                listener.checkedStoreAll(true);
            }
        } else {
            storeBean.setChecked(false);
            listener.checkedStoreAll(false);
        }
        notifyDataSetChanged();
        queryCheckedGoods();
    }

    private class GroupHolder {
        CheckBox cbGroup;
        ImageView ivStorePhoto;
        CheckBox cbEdit;
        TextView tvStoreName;
    }

    private class ChildHolder {
        CheckBox cbChild;
        ImageView ivGoodsPhoto;
        TextView tvDescribe;
        TextView tvNowPrice;
        TextView tvOldPrice;
        TextView tvCount;
        TextView tvCount2;
        TextView tvSub;
        TextView tvAdd;
        TextView btnDelete;
        LinearLayout layoutCount;
        RelativeLayout layoutContent;
    }
}