在 recyclerview 中单击按钮的增量计数器

Question

我正在开发使用 volley 获取数据并使用 recyclerview.i 在提要中显示的应用程序，每张卡片中都有一个按钮，单击该按钮后，将计算点击次数并将其显示在特定的文本视图中卡片。它工作得很好但是当我从卡片滚动到另一张卡片然后滚动回前一张卡片（即重新加载卡片）时，点击计数从单击按钮时从零开始，而不是从它的值继续重新加载之前。我究竟做错了什么？这是我的代码

package net.simplifiedcoding.myfeed;
import android.content.Context;
import android.media.Image;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ProgressBar;
import android.widget.TextView;

import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.NetworkImageView;

import org.w3c.dom.Text;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by Belal on 11/9/2015.
 */

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


    //Imageloader to load image
    private ImageLoader imageLoader;
    private Context context;

    //List to store all superheroes
    List<SuperHero> superHeroes;

    //Constructor of this class
    public CardAdapter(List<SuperHero> superHeroes, Context context){
        super();
        //Getting all superheroes
        this.superHeroes = superHeroes;
        this.context = context;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.superheroes_list, parent, false);
        ViewHolder viewHolder = new ViewHolder(v);
        return viewHolder;

    }



    @Override
    public void onBindViewHolder(final ViewHolder holder, int position) {



        //Getting the particular item from the list
        SuperHero superHero =  superHeroes.get(position);

        //Loading image from url
        imageLoader = CustomVolleyRequest.getInstance(context).getImageLoader();
        imageLoader.get(superHero.getImageUrl(), ImageLoader.getImageListener(holder.imageView, R.drawable.image, android.R.drawable.ic_dialog_alert));

        //Showing data on the views
        holder.imageView.setImageUrl(superHero.getImageUrl(), imageLoader);
        holder.textViewName.setText(superHero.getName());
        holder.textViewPublisher.setText(superHero.getPublisher());
        holder.textViewLikes.setText(superHero.getLikes());
        //increment counter and display in textview when button is clicked
        holder.custom_button.setOnClickListener(new View.OnClickListener() {

            int count = 0 ;
            @Override
            public void onClick(View v) {
                count ++;
                holder.txtCount.setText(String.valueOf(count));

                }

            });
    }



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


    class ViewHolder extends RecyclerView.ViewHolder{
        //Views
        public NetworkImageView imageView;
        public TextView textViewName;
        public TextView textViewPublisher;
        public TextView textViewLikes;
        public TextView txtCount;
        public ImageButton custom_button;

        //Initializing Views
        public ViewHolder(View itemView) {
            super(itemView);
            imageView = (NetworkImageView) itemView.findViewById(R.id.imageViewHero);
            textViewName = (TextView) itemView.findViewById(R.id.textViewName);
            textViewPublisher = (TextView) itemView.findViewById(R.id.textViewPublisher);
            textViewLikes = (TextView) itemView.findViewById(R.id.textViewlikes);
            txtCount = (TextView)itemView.findViewById(R.id.txtCount);
            custom_button = (ImageButton) itemView.findViewById(R.id.custom_button);



        }


    }

}

Answer 1

在 android 视图被重用时，您需要为超级英雄添加一个私有变量计数设置为零，并且对于每个按钮单击，增加计数并显示它

holder.custom_button.setOnClickListener(new View.OnClickListener() {


        @Override
        public void onClick(View v) {
            superHero.get(position).setCount(superHero.get(position).getCount+1)
            holder.txtCount.setText(superHero.get(position).getCount());

            }

        });
holder.txtCount.setText(superHero.get(position).getCount());

在 recyclerview 中单击按钮的增量计数器

increment counter which click of button in recyclerview

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