RecyclerView 中 onBindViewHolder 的问题

Question

我无法将我的 textView 放在内部 class 项目的 onBindViewHolder 方法中，我已经完成了 public 和最终，但仍然无法解决它，我尝试了很多示例，这是同样的问题。

package com.example.recyclerview;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class Adapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    Context context;
    String [] items;
    public Adapter(Context context, String[] items){
        this.context = context;
        this.items = items;
    }

    @NonNull
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        LayoutInflater inflater = LayoutInflater.from(context);
        View row = inflater.inflate(R.layout.custom_row, viewGroup, false);
        Item item = new Item(row);
        return item;
    }

    @Override
    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {
        String mCurrent = items[i];
        viewHolder.textView.setText(mCurrent); // error here textView cannot resolve
    }

    @Override
    public int getItemCount() {
        return items.length;
    }

    public class Item extends RecyclerView.ViewHolder {
        public final TextView textView;
        public Item(@NonNull View itemView) {
            super(itemView);
            textView = (TextView) itemView.findViewById(R.id.item);
        }
    }

}

Answer 1

您应该更正适配器的通用类型：使用 Adapter.Item 而不是 RecyclerView.ViewHolder

public class Adapter extends RecyclerView.Adapter<Adapter.Item>

然后更新 onCreateViewHolder 和 onBindViewHolder 方法的签名

RecyclerView 中 onBindViewHolder 的问题

Problem with onBindViewHolder in RecycleView

java

android

inner-classes

android-recyclerview