NullPointerException

    java.lang.NullPointerException
        at android.view.LayoutInflater.from(LayoutInflater.java:211)
        at com.yijiantong.hetaoyougou.xiao.gouwuche.adapter.ShoppingCarAdapter.getGroupView(ShoppingCarAdapter.java:95)
        at android.widget.ExpandableListConnector.getView(ExpandableListConnector.java:446)
        at android.widget.AbsListView.obtainView(AbsListView.java:2263)
        at android.widget.ListView.makeAndAddView(ListView.java:1790)
        at android.widget.ListView.fillDown(ListView.java:691)
        at android.widget.ListView.fillFromTop(ListView.java:752)
        at android.widget.ListView.layoutChildren(ListView.java:1616)
        at android.widget.AbsListView.onLayout(AbsListView.java:2091)
        at android.view.View.layout(View.java:14817)
        at android.view.ViewGroup.layout(ViewGroup.java:4631)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
        at android.view.View.layout(View.java:14817)
        at android.view.ViewGroup.layout(ViewGroup.java:4631)

 public ShoppingCarAdapter(Context contex，t...) {
        this.context = context;
   ...
    }

static class GroupViewHolder {
        ImageView ivSelect;
        TextView tvStoreName;
        LinearLayout ll;

        GroupViewHolder(View view) {

            ivSelect = view.findViewById(R.id.iv_select);
            tvStoreName = view.findViewById(R.id.tv_store_name);
            ll = view.findViewById(R.id.ll);


        }
    }

 @Override
    public View getGroupView(final int groupPosition, final boolean isExpanded, View convertView, ViewGroup parent) {
        GroupViewHolder groupViewHolder;
        if (convertView == null) {


//            View.inflate(context, R.layout.item_shopping_car_group, null);
            convertView =LayoutInflater.from(context).inflate(R.layout.item_shopping_car_group,null);

            groupViewHolder = new GroupViewHolder(convertView);
            convertView.setTag(groupViewHolder);
        } else {
            groupViewHolder = (GroupViewHolder) convertView.getTag();
        }

getGroupView这个方法你看看，里面有个空对象，然后你又用了这个空对象.方法，报错了，调试一下就知道了

  shoppingCarAdapter = new ShoppingCarAdapter(getActivity()...);
        elvShoppingCar.setAdapter(shoppingCarAdapter);

这块getActivity()写错了，写成其他的了

适配中返回convertView了吗