我试图在用户点击它时从我的RecyclerView删除一个项目。但是,即使Adapter中的delete方法是public,当试图从MyViewHolder中的onClick调用'delete'方法时,出现错误“无法解析方法delete(int)”。无法从ViewHolder调用适配器中的方法(RecyclerView)
什么给?它是公开的,为什么我不能称它?
GroceryItemAdapter
public class GroceryItemAdapter extends RecyclerView.Adapter<MyViewHolder> {
private LayoutInflater inflater;
private Context context;
List<MetaData> data = Collections.emptyList();
public GroceryItemAdapter(Context context, List<MetaData> data) {
this.context = context;
inflater = LayoutInflater.from(context);
this.data = data;
}
public void delete(int position) {
data.remove(position);
notifyItemRemoved(position);
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.grocery_item_row, parent, false);
MyViewHolder holder = new MyViewHolder(view);
Log.i("GroceryHero", "onCreateViewHolder called");
return holder;
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
MetaData current = data.get(position);
holder.title.setText(current.title);
holder.icon.setImageResource(current.iconid);
Log.i("GroceryHero","onBindViewHolder called " + position);
}
@Override
public int getItemCount() {
return data.size();
}
}
MyViewHolder:
class MyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView title;
ImageView icon;
public MyViewHolder(View itemView) {
super(itemView);
Log.i("GroceryHero", "MyViewHolder called");
title = (TextView) itemView.findViewById(R.id.grocery_text);
icon = (ImageView) itemView.findViewById(R.id.grocery_icon);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
Toast.makeText(v.getContext(), "Item clicked at " + getAdapterPosition(), Toast.LENGTH_SHORT).show();
delete(getAdapterPosition()); // ERROR: Cannot resolve method
}
}
您的MyViewHolder是recyclerview的内部类吗? –
将您的MyViewHolder类移入GroceryItemAdapter的内部类 –
谢谢Sam!移动课程的确有窍门。 – Xarsiss