Vfrdtyky

I am working on expandableListview which is working fine. Now I want to show gridLayoutManager with recyclerView in child View, which is not working fine.

I want this type of menu when I click the category then sub category will be pop up with grid layout or linear layout with horizontal scrollView.
adapter code is:

@Override

public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {



    final ChildCategory child = (ChildCategory) getChild(groupPosition, childPosition);

    int Id = child.getId();

    String name = child.getName();

    if (convertView == null) {

        LayoutInflater infalInflater = (LayoutInflater) this._context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        convertView = infalInflater.inflate(R.layout.childs, parent, false);

    }

    childCate = new ArrayList<>();

    childCate.add(new ChildCategory(Id,name));

    rvCategory = convertView.findViewById(R.id.rvCategory);

    InnerRecyclerViewAdapter adapter = new InnerRecyclerViewAdapter(_context,childCate);

    rvCategory.setLayoutManager(new LinearLayoutManager(_context,LinearLayoutManager.HORIZONTAL,false));

    rvCategory.setAdapter(adapter);

    adapter.notifyDataSetChanged();

    Log.e("List",childCate.toString());

    for (int i=0;i<childCate.size();i++){

        Log.e("name",name );

    }

    return convertView;

}

InnerRecyclerViewAdapter code is:

public class InnerRecyclerViewAdapter extends RecyclerView.Adapter<InnerRecyclerViewAdapter.ViewHolder> {

private ArrayList<ChildCategory> child;

Context context;

int groupPosition;

String groupname;



public InnerRecyclerViewAdapter(Context context,ArrayList<ChildCategory> child) {

    this.child = child;

    this.context=context;

}



public class ViewHolder extends RecyclerView.ViewHolder {

    TextView name;

    CardView cardView;



    public ViewHolder(View itemView) {

        super(itemView);

        name = itemView.findViewById(R.id.itemTextView);

        cardView=itemView.findViewById(R.id.cardView);

    }

    public void setData(final ChildCategory childCategory){

        name.setText(childCategory.getName());

    }

}



@Override

public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    View v = LayoutInflater.from(parent.getContext())

            .inflate(R.layout.card_expand_item_view, parent, false);

    InnerRecyclerViewAdapter.ViewHolder vh = new InnerRecyclerViewAdapter.ViewHolder(v);

    return vh;

}



@Override

public void onBindViewHolder(ViewHolder holder, final int position) {

    holder.setData(child.get(position));

}



@Override

public int getItemCount() {

    return child.size();

}

}

where I am doing mistake.