ExpandableListView购物车

1.展开二级列表

expandView.setAdapter(eAdapter);
for (int i = 0; i < eAdapter.getGroupCount(); i++) {
    expandView.expandGroup(i);
}

2.全选

private void initData() {
    int groupCount = eAdapter.getGroupCount();
    for (int i = 0; i < groupCount; i++) {
        User.DataBean group = (User.DataBean) eAdapter.getGroup(i);
        List listBeans = group.getList();
        group.setYiCheck(quanxuan.isChecked());
        for (int j = 0; j < listBeans.size(); j++) {
            listBeans.get(j).setErCheck(quanxuan.isChecked());
            getTotal();
        }
    }
    eAdapter.notifyDataSetChanged();
}

3.父级选子级

//大的选小的
expandView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
    @Override
    public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
        User.DataBean group = (User.DataBean) eAdapter.getGroup(groupPosition);
        group.setYiCheck(!group.isYiCheck());
        boolean flag = true;
        if (group.isYiCheck()) {
            flag = false;
        }
        List listBeans = group.getList();
        for (int i = 0; i < listBeans.size(); i++) {
            listBeans.get(i).setErCheck(!flag);
        }
        eAdapter.notifyDataSetChanged();
        getTotal();
        return true;
    }
});

4.子级的选中

//小的
expandView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
    @Override
    public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
        User.DataBean.ListBean child = (User.DataBean.ListBean) eAdapter.getChild(groupPosition, childPosition);
        if (fa) {
            child.setErCheck(true);
            fa = false;
        } else {
            fa = true;
            child.setErCheck(false);
        }
        eAdapter.notifyDataSetChanged();
        getTotal();
        return true;
    }
});

5.价格的变化

eAdapter.setNumChangeListenern(new AppView.NumChangeListener() {
    @Override
    public void onNumChangeListener(int pp) {
        getTotal();
    }
});

private void getTotal() {
    double total = 0;
    int groupCount = eAdapter.getGroupCount();
    for (int i = 0; i < groupCount; i++) {
        User.DataBean group = (User.DataBean) eAdapter.getGroup(i);
        List listBeans = group.getList();
        for (int j = 0; j < listBeans.size(); j++) {
            User.DataBean.ListBean listBean = listBeans.get(j);
            boolean erCheck = listBean.isErCheck();
            if (erCheck == true) {
                String price = listBean.getPrice();
                total = total + Float.valueOf(price) * listBean.getNum();
            }
        }
        heji.setText("合计:" + total);
    }
}

 

6.adapter

public class ExpandAdapter extends BaseExpandableListAdapter {
    private Context mContext;
    private List mGoodsCartBeanList;
    private AddView.OnNumberChangeListener mOnNumberChangeListener;

    public ExpandAdapter(Context context, List goodsCartBeanList) {
        mContext = context;
        mGoodsCartBeanList = goodsCartBeanList;
    }

    public void setGoodsCartBeanList(List goodsCartBeanList) {
        mGoodsCartBeanList = goodsCartBeanList;
    }

    @Override

    public int getGroupCount() {
        return mGoodsCartBeanList.size();
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        return mGoodsCartBeanList.get(groupPosition).getGoods().size();
    }

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

    @Override
    public Object getChild(int groupPosition, int childPosition) {
        return mGoodsCartBeanList.get(groupPosition).getGoods().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 boolean isChildSelectable(int groupPosition, int childPosition) {
        return false;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        GroupViewHolder groupViewHolder = null;
        if (convertView == null) {
            convertView = View.inflate(mContext, R.layout.group_adapter_item, null);
            groupViewHolder = new GroupViewHolder();
            groupViewHolder.groupCk = convertView.findViewById(R.id.ck_groupBox);
            groupViewHolder.groupName = convertView.findViewById(R.id.tv_groupName);
            convertView.setTag(groupViewHolder);
        } else {
            groupViewHolder = (GroupViewHolder) convertView.getTag();
        }
        groupViewHolder.groupCk.setChecked(mGoodsCartBeanList.get(groupPosition).getGroup_ck());
        groupViewHolder.groupName.setText(mGoodsCartBeanList.get(groupPosition).getVend_name());
        return convertView;
    }

    @Override
    public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
        ChildViewHolder childViewHolder = null;
        if (convertView == null) {
            convertView = View.inflate(mContext, R.layout.child_adapter_item, null);
            childViewHolder = new ChildViewHolder();
            childViewHolder.childCk = convertView.findViewById(R.id.ck_childBox);
            childViewHolder.childImage = convertView.findViewById(R.id.iv_childImage);
            childViewHolder.childIma = convertView.findViewById(R.id.iv_childIma);
            childViewHolder.childBianhao = convertView.findViewById(R.id.tv_childBianhao);
            childViewHolder.childXuhao = convertView.findViewById(R.id.tv_childXuhao);
            childViewHolder.childMoney = convertView.findViewById(R.id.tv_childPrice);
            childViewHolder.childPhoto = convertView.findViewById(R.id.bt_photo);
            childViewHolder.addView = convertView.findViewById(R.id.addView);
            convertView.setTag(childViewHolder);
        } else {
            childViewHolder = (ChildViewHolder) convertView.getTag();
        }
        childViewHolder.childCk.setChecked(mGoodsCartBeanList.get(groupPosition).getGoods().get(childPosition).isChild_ck());
        childViewHolder.childBianhao.setText(mGoodsCartBeanList.get(groupPosition).getGoods().get(childPosition).getGoods_name());
        childViewHolder.childXuhao.setText(mGoodsCartBeanList.get(groupPosition).getGoods().get(childPosition).getChoose_num());
        childViewHolder.childMoney.setText(mGoodsCartBeanList.get(groupPosition).getGoods().get(childPosition).getGoods_price());
        Glide.with(mContext).load(mGoodsCartBeanList.get(groupPosition).getGoods().get(childPosition).getGoods_thumb()).into(childViewHolder.childImage);
        Glide.with(mContext).load(mGoodsCartBeanList.get(groupPosition).getGoods().get(childPosition).getGoods_thumb()).into(childViewHolder.childIma);
        childViewHolder.childPhoto.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mHttpPhoto.getPhoto(v,groupPosition, childPosition);
            }
        });
        childViewHolder.addView.setOnNumberChangeListener(new AddView.OnNumberChangeListener() {
            @Override
            public void onNumChange(View view, int po) {
                mGoodsCartBeanList.get(groupPosition).getGoods().get(childPosition).setGoods_number(String.valueOf(po));
                if (mOnNumberChangeListener != null) {
                    mOnNumberChangeListener.onNumChange(view, po);
                }
            }
        });
        return convertView;
    }

    public void setOnNumberChangeListener(AddView.OnNumberChangeListener mOnNumberChangeListener) {
        this.mOnNumberChangeListener = mOnNumberChangeListener;
    }

    class GroupViewHolder {
        CheckBox groupCk;
        TextView groupName;
    }

    class ChildViewHolder {
        CheckBox childCk;
        ImageView childImage, childIma;
        TextView childBianhao, childXuhao, childMoney;
        AddView addView;
        Button childPhoto;
    }

    private httpPhoto mHttpPhoto;

    public void setHttpPhoto(httpPhoto mHttpPhoto) {
        this.mHttpPhoto = mHttpPhoto;
    }

    public interface httpPhoto {
        void getPhoto(View view, int groupPo, int childPo);
    }
}