CODEWITHSUNDEEP
javaandroidandroid-studioandroid-recyclerviewpicasso
Harris Douglas
Harris Douglas

Reputation: 45

onBindViewHolder must be declared abstract

I am getting the error : class "FlickrRecyclerViewAdapter" must either be declared abstract or implement method abstract method onBindViewHolder(VH, int) in 'Adapter'

While this error should be self explanitory, I have implemended onBindViewHolder and the error is still present.

Relvant Code - 

public class FlickrRecyclerViewAdapter extends RecyclerView.Adapter {
    private List<Photo> mPhotosList;
    private Context mContext;

    public FlickrRecyclerViewAdapter(Context context, List<Photo> photosList) {
        mContext = context;
        this.mPhotosList = photosList;
    }

    @Override
    public void onBindViewHolder(FlickrImageViewHolder flickrImageViewHolder, int i) {

            Photo photoItem = mPhotosList.get(i);
            Picasso.with(mContext).load(photoItem.getmImage())
                    .error(R.drawable.placeholder)
                    .placeholder(R.drawable.placeholder)
                    .into(flickrImageViewHolder.thumbnail);

        }
    }

Thanks

Upvotes: 1

Views: 4673

Answers (2)

Manos Nikolaidis
Manos Nikolaidis

Reputation: 22254

RecyclerView.Adapter that you have extended has a method :

public void onBindViewHolder(RecyclerView.ViewHolder holder, int position)

that you have to override. With the method signature that your are using you have to extend like this :

public class FlickrRecyclerViewAdapter extends RecyclerView.Adapter<FlickrImageViewHolder>

Upvotes: 0

Blackbelt
Blackbelt

Reputation: 157467

The definition of The adapter is 

RecyclerView.Adapter<VH extends android.support.v7.widget.RecyclerView.ViewHolder>

where VH is the a subclass of ViewHolder. So you can either change the signature of you onBindViewHolder like

@Override
public void onBindViewHolder(RecyclerView.ViewHolder flickrImageViewHolder, int i) {

or change 

extends RecyclerView.Adapter {

with 

extends RecyclerView.Adapter<FlickrImageViewHolder> {

Upvotes: 8

Related Questions