Android Viewgroup Issues

Question

I have an issue using a viewGroup, for some reason the id doesn't process the statement, and really I tried everything, can you help please?

I don't know if it is something about the version3.3.2 or what's wrong with the code

public class popularAdapter extends  RecyclerView.Adapter<popularAdapter.ImageViewHolder> {

    private Context mContext;
    private List<popular> mPopulars;

    public popularAdapter (Context context,List<popular>populars){

        mContext=context;
        mPopulars=populars;



    }




    @Override
    public ImageViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                                                      //HERE IS THE ISSUE
        View v= LayoutInflater.from(mContext).inflate(R.layout.popular_item2,viewGroup,false);

        return new ImageViewHolder(v);
    }

    @Override
    public void onBindViewHolder(ImageViewHolder holder, int position) {

    popular popularCur=mPopulars.get(position);
    ImageViewHolder.prodName.setText(popularCur.getProduc_name());


    }

    @Override
    public int getItemCount() {
        return 0;
    }

    public class ImageViewHolder extends RecyclerView.ViewHolder {

        public TextView prd_name;
        public TextView prd_price;
        public TextView prd_img;

        public ImageViewHolder(View itemView) {
            super(itemView);

            prd_name =itemView.findViewById(R.id.prodName);
            prd_price=itemView.findViewById(R.id.prodPrice);
            prd_img  =itemView.findViewById(R.id.prodImageHolder);




        }
    }

}

I think the problem is with the context you are sending.See my answer down there.Try that solution. — Brahma Datta, Mar 27 '19 at 05:46
@g.brahmaDatta sir not in here context check he returning 0 in item count — Ashvin solanki, Mar 27 '19 at 05:50

Ashvin solanki · Answer 1 · 2019-03-27T06:24:52.630

1

problem is here

you will never get any items in RecyclerView because you are returning 0 in getItemCount

    @Override
    public int getItemCount() 
    {
       //return 0 ?
        return 0;
    }

change with

    @Override
    public int getItemCount() 
    {
        return mPopulars.size();
    }

`getItemCount`

int getItemCount ()

Returns the total number of items in the data set held by the adapter.

edited Mar 27 '19 at 06:24

answered Mar 27 '19 at 05:49

Ashvin solanki

4,802
3
25
65

score 0 · Answer 2 · answered Mar 27 '19 at 05:45

0

Try this solution

public ImageViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    View v= LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.popular_item2,viewGroup,false);
    return new ImageViewHolder(v);
}

answered Mar 27 '19 at 05:45

Brahma Datta

1,102
1
12
20

score 0 · Answer 3 · answered Mar 27 '19 at 06:23

Optimizing @Ashwin solanki answer

Change following code

@Override
public int getItemCount() 
{
   //return 0 ?
    return 0;
}

to

@Override
public int getItemCount() 
{
   //return 0 ?
    if(mPopulars != null) {
        return mPopulars.size();
    }
    return 0;
}

Description: onCreateViewHolder and onBindViewHolder methods get called for the count which is returned by getItemCount method. As your code is always returning 0, these methods will not get called and list will not get populated on UI.

Also, check following line from you code from onBindViewHolder method:

ImageViewHolder.prodName.setText(popularCur.getProduc_name());

You are considering 'prodName' variable of 'ImageViewHolder' class as static but it is not. Instead it should be

holder.prodName.setText(popularCur.getProduc_name());

Android Viewgroup Issues

3 Answers3

getItemCount

`getItemCount`