Ndtyjky

I am developing an android app where I have used nested RecyclerView but I am not achieving what I want.I want to achieve on this list it should show Title and below multiple images like json below how can I achieve that I am using two viewholder and it should scrool as well.
json structure

below Adapter class
public class UranAdapter extends RecyclerView.Adapter {

public List<Exhibit> exhibitList;

public Context context;



public UranAdapter(List<Exhibit> uranList, Context context) {

    this.exhibitList = uranList;

    this.context = context;



}



@NonNull

@Override

public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {





    View itemView;

    switch (viewType) {

        case Exhibit.TEXT_TYPE:

            itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.exhibit_list, parent, false);

            return new ViewHolder(itemView);

        case Exhibit.IMAGE_TYPE:

            itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.exhibit_list2, parent, false);

            return new ImageViewHolder(itemView);



    }

    return null;

}



@Override

public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {



}





@Override

public int getItemViewType(int position) {





    return exhibitList.get(position).type;

}



public int getItemCount() {

    return exhibitList.size();

}





public void onBindViewHolder(@NonNull ViewHolder holder, int position) {

    Exhibit exhibit = exhibitList.get(position);

    switch (exhibit.type) {



        case Exhibit.TEXT_TYPE:

            ((ViewHolder) holder).exhibition_textView.setText(exhibit.getTitle());



            break;





        case Exhibit.IMAGE_TYPE:

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

                ((ViewHolder) holder).exhibition_imageView.setImageResource(exhibit.image);

            }





            break;



    }



}







public static class ViewHolder extends RecyclerView.ViewHolder {





    public ImageView exhibition_imageView;

    TextView exhibition_textView;



    public ViewHolder(View view) {

        super(view);

        exhibition_textView = (TextView) view.findViewById(R.id.exhibition_textview);





    }

}

    public static class ImageViewHolder extends RecyclerView.ViewHolder {





        public ImageView exhibition_imageView;

        TextView exhibition_textView;



        public ImageViewHolder(View view) {

            super(view);

            exhibition_imageView = (ImageView) view.findViewById(R.id.exhibition_imageview);





        }

    }

}

below MainActivity

public class MainActivity extends AppCompatActivity {

public List<Exhibit> exhibitList = new ArrayList<>();

Context context;

RecyclerView recyclerView;





public UranAdapter uranAdapter;



@Override

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);



    ApiInterface apiInterface = ApiClient.getApiService();

    Call<ExhibitsLoader> call = apiInterface.getExhibitList();

    call.enqueue(new Callback<ExhibitsLoader>() {

        @Override

        public void onResponse(Call<ExhibitsLoader> call, Response<ExhibitsLoader> response) {

            exhibitList = response.body().getExhibitList();

            exhibitList.add(new Exhibit(Exhibit.IMAGE_TYPE));

            RecyclerView recyclerView = findViewById(R.id.recycler_view);

            recyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext()));

            uranAdapter = new UranAdapter(exhibitList, context); // changes

            recyclerView.setAdapter(uranAdapter);



        }



        @Override

        public void onFailure(Call<ExhibitsLoader> call, Throwable t) {



        }

    });





}

}

below image what I want

I think what you need here is flatMap the embedded image list into one-level list and you're going correctly to have two ViewHolder of different types, one for title, and one for image. Don't understand why your ViewHolders are static.

You forget to call notifyDatasetChanged() after setting the adapter.

        uranAdapter = new UranAdapter(exhibitList, context); // changes

        recyclerView.setAdapter(uranAdapter);

        uranAdapter.notifyDatasetChanged();

Use Expandable CardView for this ..
Like : https://www.youtube.com/watch?v=z9qScBaKfnM&t=727s

Why don't you use two RecyclerViews, one inside the other?

One RecyclerView will have the title and a children RecyclerView. The second RecyclerView(the children RecyclerView) will have just the images.

Check this post: Recyclerview inside Recyclerview , get click position of child row inside parent Adapter