On Button點擊recyclerview如何增加計數器並顯示在文本視圖

我正在使用回收視圖和排球顯示圖像的應用程序。我在每張卡片中都有imageview，textview和按鈕。我試圖添加功能到我的按鈕，單擊時，將計數點擊次數並顯示它在一個文本視圖。我得到一個錯誤「變量'計數'從內部類中被聲明，需要被聲明爲最終」試圖做到這一點。我做錯了什麼？這是密碼On Button點擊recyclerview如何增加計數器並顯示在文本視圖

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(ViewHolder holder, int position) { 

     int count = 0; 

     //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()); 
     holder.txtCount.setText(String.valueOf(count)); 
     holder.custom_button.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       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); 
     } 


    } 

}

來源

2016-03-07 Pfil Mintz

地方holder.txtCount.setText(String.valueOf(count));的onclick函數內部，並宣佈int count =0;下面，你聲明你的類。這樣

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

int count =0;

//Imageloader to load image 
    private ImageLoader imageLoader;

來源

2016-03-07 03:21:18

按鈕與您的解決方案。但是，無論點擊哪個按鈕，所有d行中的所有文字視圖都會以相同的點擊次數進行更新。我只想要在哪個d按鈕被點擊的textview被更新。 @sachinMalik –

因爲你需要先在setter中的回收站視圖的SuperHero類中設置數據。然後用對象superHero調用該方法的getter。 –

因爲您的TextView每次計數值更改時都不更新文本。試試這個：（未測試）

private final Handler mHandler = new Handler(); // globle variable 
    @Override 
    public void onBindViewHolder(final ViewHolder holder, int position) { // Note: final holder 
    ... 
     holder.txtCount.setText(String.valueOf(count)); 
     holder.custom_button.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       count ++; 
       mHandler.post(new Runnable() { 
        @Override 
        public void run() { 
         holder.txtCount.setText(String.valueOf(count)); // update new value 
        } 
       }); 
      } 
     }); 

}

來源

2016-03-07 02:33:47 NamNH

On Button點擊recyclerview如何增加計數器並顯示在文本視圖

回答

相關問題