//全選計算價格

//全選
checkAll.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
        if (b){
            setCheckAll(1);
        }else {
            setCheckAll(0);
        }
    }
});

public void setCheckAll(int s){
    int groupCount = expanAdapter.getGroupCount();
    for (int i = 0; i <groupCount ; i++) {
        ShopCarBean.DataBean groupData = (ShopCarBean.DataBean) expanAdapter.getGroup(i);
        if (s == 1){
            groupData.setChecked(true);
        }else {
            groupData.setChecked(false);
        }

        List<ShopCarBean.DataBean.ListBean> childData = groupData.getList();
        for (int j = 0; j < childData.size(); j++) {
            ShopCarBean.DataBean.ListBean childList = childData.get(j);
            childList.setSelected(s);
        }
    }
    expanAdapter.notifyDataSetChanged();
    getTotal();
}

//計算總價
public void getTotal(){
    double total =0;
    int sum = 0;
    int groupCount = expanAdapter.getGroupCount();
    for (int i = 0; i < groupCount; i++) {
        ShopCarBean.DataBean groupData = (ShopCarBean.DataBean) expanAdapter.getGroup(i);
        List<ShopCarBean.DataBean.ListBean> childData = groupData.getList();
        for (int j = 0; j < childData.size(); j++) {
            ShopCarBean.DataBean.ListBean childList = childData.get(j);
            if(childList.isChecked()){
                double price = childList.getPrice();
                total = total + price * childList.getNum();
                sum = sum + childList.getNum();
            }
        }
    }
    //設定總價內容
    tv_total.setText("合計:"+total);
    tv_buy.setText("去結算("+sum+")");
}

//父條目與子條目的點選事件(在xml中設定CheckBox失去焦點)

//父條目點選事件
expandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
    @Override
    public boolean onGroupClick(ExpandableListView expandableListView, View view, int i, long l) {
        ShopCarBean.DataBean groupData = (ShopCarBean.DataBean) expanAdapter.getGroup(i);
        //判斷自身反選
        groupData.setChecked(!groupData.isChecked());
        int c = 0;
        if(groupData.isChecked()){
            c = 1;
        }
        List<ShopCarBean.DataBean.ListBean> childData = groupData.getList();
        for (int j = 0; j <childData.size() ; j++) {
            ShopCarBean.DataBean.ListBean childList = childData.get(j);
            childList.setSelected(c);
        }
        expanAdapter.notifyDataSetChanged();
        getTotal();
        return true;
    }
});
//子條目點選事件
expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
    @Override
    public boolean onChildClick(ExpandableListView expandableListView, View view, int i, int i1, long l) {
        ShopCarBean.DataBean.ListBean childData = (ShopCarBean.DataBean.ListBean) expanAdapter.getChild(i, i1);
        //判斷自身反選
        boolean checked = childData.isChecked();
        if(checked){
            childData.setSelected(0);
        }else {
            childData.setSelected(1);
        }
        expanAdapter.notifyDataSetChanged();
        getTotal();
        return true;
    }
});