Question

错误：类'PersonViewHolder'必须声明为abstract或在'OnClickListener'中实现抽象方法'onClick（View）'

在模拟器中运行时，会显示toast消息但是监听器块似乎无法正常工作。我已经在堆栈溢出中经历了很多线程但是找不到解决方案

适配器类

void PlaySound_Volume(string fname, float fVolume = 1, bool async = false){
    DWORD dwFileSize;
    BYTE* pFileBytes;

    ifstream f(fname, ios::binary);

    f.seekg(0, ios::end);
    int lim = f.tellg();
    dwFileSize = lim;

    pFileBytes = new BYTE[lim];
    f.seekg(0, ios::beg);

    f.read((char *)pFileBytes, lim);

    f.close();


    BYTE* pDataOffset = (pFileBytes + 40);

    __int8 * p = (__int8 *)(pDataOffset + 8);
    for (int i = 80 / sizeof(*p); i < dwFileSize / sizeof(*p); i++){
// COMMENT FOLLOWING LINE
        p[i] = (__int8)((float)p[i] * fVolume);

    }


    if (async)
        PlaySound((LPCSTR)pFileBytes, NULL, SND_MEMORY | SND_ASYNC);
    else
        PlaySound((LPCSTR)pFileBytes, NULL, SND_MEMORY);
}

Recycler.java

public class RVAdapter extends RecyclerView.Adapter<RVAdapter.PersonViewHolder> {
    private String pName;
    private String pAge;
    private Context context;
    private List<Person> persons;
    private OnItemClickListener listener;

public static class PersonViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
    CardView cv;
    TextView personName;
    TextView personAge;
    TextView personRegno;
    TextView personOPno;
    TextView personDocName;
    TextView personGender;
    ImageView personPhoto;
    private OnItemClickListener listener;

    PersonViewHolder(final View itemView) {
        super(itemView);
        cv = (CardView) itemView.findViewById(R.id.cv);
        personName = (TextView) itemView.findViewById(R.id.person_name);
        personAge = (TextView) itemView.findViewById(R.id.person_age);
        personRegno = (TextView) itemView.findViewById(R.id.person_Reg_no);
        personOPno = (TextView) itemView.findViewById(R.id.person_op_no);
        personDocName = (TextView) itemView.findViewById(R.id.person_doctor_name);
        personPhoto = (ImageView) itemView.findViewById(R.id.person_photo);
        personGender = (TextView) itemView.findViewById(R.id.person_gender);
        final Context context = itemView.getContext();

        cv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
               // Toast.makeText(view.getContext(), "ithu thaan mudiyum", Toast.LENGTH_SHORT).show();
                if(listener!=null)
                    listener.onItemClick(personName.getText().toString(),personAge.getText().toString());
            }
        });

    }
}

    public RVAdapter(Context context, List<Person> persons, String pName, String pAge) {
        this.context = context;
        this.pName = pName;
        this.pAge = pAge;
        this.persons = persons; 
    }


    @Override
    public PersonViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater inflater = LayoutInflater.from(parent.getContext());
        View view = inflater.inflate(R.layout.cardview_item, null);
        return new PersonViewHolder(view);
    }

    @Override
    public void onBindViewHolder(PersonViewHolder holder, int position) {
        //getting the product of the specified position
        // Person persons = Person.get(position);

        //binding the data with the viewholder views
        holder.personName.setText(persons.get(position).getName());
        holder.personAge.setText(persons.get(position).getAge());
        holder.personRegno.setText(persons.get(position).getRegno());
        holder.personOPno.setText(persons.get(position).getopno());
        holder.personDocName.setText(persons.get(position).getDoctorname());
        holder.personGender.setText(persons.get(position).getGender());
        holder.personPhoto.setImageDrawable(context.getResources().getDrawable(persons.get(position).getImage()));
        holder.setOnItemClickListener(listener);
    }


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

public void setOnItemClickListener(OnItemClickListener listener){
    this.listener = listener;
}

public interface OnItemClickListener{
    public void onItemClick(String personName, String personAge);
}
}

这是我第一次发帖提问。所以请忽略格式化问题。

Answer 1

如果您实施onClick，则需要实施View.OnClickListener方法，但在您的情况下，您需要设置如下的监听器

cv.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
           // Toast.makeText(view.getContext(), "ithu thaan mudiyum", Toast.LENGTH_SHORT).show();
            if(listener!=null)
                listener.onItemClick(personName.getText().toString(),personAge.getText().toString());
        }
    });

因此，您需要删除implements View.OnClickListener或覆盖其视图持有者类中的onClick()方法，如下所示

@Override
public void onClick(View v) {

}

无法在Adapter类中实现View.onClickListener

1 个答案: