要么被声明为抽象，要么在

Question

public class SubjectAdapter extends RecyclerView.Adapter<SubjectHolder> {
private ArrayList<Subjects> subjectsArrayList=new ArrayList<Subjects>();
private  Context mContext;


public SubjectAdapter(Context context) {
    mContext=context;
    populateList();
    this.subjectsArrayList = subjectsArrayList;
}

public void populateList(){
//Populates subjectArrayList 
}
@Override
public void onBindViewHolder(@NonNull SubjectHolder holder, int position, @NonNull List payloads) {
    super.onBindViewHolder(holder, position, payloads);
    Subjects subject=subjectsArrayList.get(position);
    holder.setSubjectName(subject.getSubjectCode());


}

@NonNull
@Override
public SubjectHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    LayoutInflater layoutInflater=LayoutInflater.from(parent.getContext());
    View cardView=layoutInflater.inflate(R.layout.activity_card,parent,false);
    SubjectHolder subjectHolder=new SubjectHolder(cardView);
    return subjectHolder;
}


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

}
我阅读了类似问题的答案，但似乎没有解决。SubjectHolder是一个类，其中包含TextView和GridView。我实际上是在尝试获得这样的视图，

Answer 1

有两种onBindViewHolder()方法。必须实现两个参数，因为它在abstract中声明为RecyclerView.Adapter。您实现了三参数onBindViewHolder()方法，这很好，但是您仍然需要两参数的方法。