listview影響多行第4，第7，第10

Question

我有一個自定義列表視圖和自定義適配器。每行都有多個項目在裏面，當我點擊像按鈕它改變了ImageView的顏色，但它也影響第4,7和10行。

在互聯網上搜索後，我得知我必須使用getTag和setTag，但我不知道如何使用它。 請幫助我理解getTag和setTag的概念並解決此錯誤。

這裏是我的代碼： -

package rj.osmthemes; 



import java.util.ArrayList; 

import android.content.Context; 
import android.os.Build; 
import android.provider.ContactsContract; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.ImageView; 
import android.widget.TextView; 
import android.widget.Toast; 

import com.bumptech.glide.Glide; 


import static android.R.attr.data; 
import static rj.osmthemes.R.id.downlink; 
import static rj.osmthemes.R.id.likebtn; 
import static rj.osmthemes.R.id.likecount; 


public class ListAdapter extends ArrayAdapter<DataModel> { 
    customButtonListener customListner; 
    private ArrayList<DataModel> dataSet; 
    public String temp1; 

    public interface customButtonListener { 
     public void onButtonClickListner(int position,String value); 
     public void onImageClickListner(int position,String value); 
     public void onlikeImageClickListner(int position,String value); 
     public void ondislikeImageClickListner(int position,String value); 
    } 

    public void setCustomButtonListner(customButtonListener listener) { 
     this.customListner = listener; 
    } 

    private Context context; 
    //private ArrayList<String> data = new ArrayList<String>(); 

    public ListAdapter(ArrayList<DataModel> data, Context context) { 
     super(context, R.layout.list_layout, data); 
     this.dataSet = data; 
     this.context = context; 

    } 

    private int lastPosition = -1; 

// public ListAdapter(Context context, ArrayList<String> dataItem) { 
//  super(context, R.layout.list_layout, dataItem); 
//  this.data = dataItem; 
//  this.context = context; 
// } 

    @Override 
    public long getItemId(int position) { 
     return position; 
    } 

    @Override 
    public View getView(final int position, View convertView, ViewGroup parent) { 
     final ViewHolder viewHolder; 
     final DataModel dataModel = getItem(position); 
     if (convertView == null) { 
      LayoutInflater inflater = LayoutInflater.from(context); 
      convertView = inflater.inflate(R.layout.list_layout, null); 
      viewHolder = new ViewHolder(); 

      viewHolder.themename = (TextView) convertView.findViewById(R.id.themename); 
      viewHolder.madeby = (TextView) convertView.findViewById(R.id.madeby); 
      viewHolder.downcount = (TextView) convertView.findViewById(R.id.downcount); 
      viewHolder.likecount = (TextView) convertView.findViewById(likecount); 
      viewHolder.dislikecount = (TextView) convertView.findViewById(R.id.dislikecount); 

      viewHolder.ss1 = (ImageView) convertView.findViewById(R.id.img1); 
      viewHolder.ss2 = (ImageView) convertView.findViewById(R.id.img2); 
      viewHolder.ss3 = (ImageView) convertView.findViewById(R.id.img3); 
      viewHolder.likebtn = (ImageView) convertView.findViewById(likebtn); 
      viewHolder.dislikebtn = (ImageView) convertView.findViewById(R.id.dislikebtn); 


      viewHolder.btndownload = (Button) convertView.findViewById(downlink); 


      convertView.setTag(viewHolder); 
      final String temp = getItem(position).toString(); 

      viewHolder.likebtn.setTag(temp); 
     } else { 
      viewHolder = (ViewHolder) convertView.getTag(); 
     } 

     lastPosition = position; 

     //final String temp = getItem(position).toString(); 
     // viewHolder.tempid = Integer.parseInt(dataModel.getId()); 

     final String ss1link,ss2link,ss3link,downlink; 



     viewHolder.themename.setText(dataModel.getTheme_name()); 
     viewHolder.madeby.setText(dataModel.getMade_by()); 
     viewHolder.downcount.setText(dataModel.getDown_count()); 
     viewHolder.likecount.setText(dataModel.getLike_count()); 
     viewHolder.dislikecount.setText(dataModel.getDislike_count()); 
     ss1link = dataModel.getSs1(); 
     ss2link = dataModel.getSs2(); 
     ss3link = dataModel.getSs3(); 
     downlink = dataModel.getDown_link(); 
     // viewHolder.text.setText(temp); 
     viewHolder.btndownload.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       if (customListner != null) { 
        int downcounttmp = Integer.parseInt(dataModel.getDown_count()); 
        downcounttmp++; 
        viewHolder.downcount.setText(""+downcounttmp); 

        String name = downlink + "#" + dataModel.getTheme_name() + "#" + dataModel.getId() + "#" + downcounttmp; 
        customListner.onButtonClickListner(position,name); 
       } 

      } 
     }); 
     viewHolder.ss1.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (customListner != null) { 

        customListner.onImageClickListner(position,ss1link); 
       } 
      } 
     }); 
     viewHolder.ss2.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (customListner != null) { 

        customListner.onImageClickListner(position,ss2link); 
       } 
      } 
     }); 
     viewHolder.ss3.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (customListner != null) { 

        customListner.onImageClickListner(position,ss3link); 
       } 
      } 
     }); 

     viewHolder.likebtn.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (customListner != null) { 

        // Toast.makeText(context, dataModel.getId() + " {  " ,Toast.LENGTH_LONG).show(); 
        if(viewHolder.check == 0){ 
         int likecount = Integer.parseInt(dataModel.getLike_count()); 
         likecount++; 
         viewHolder.likecount.setText(""+likecount); 
         String name = likecount + "#" + dataModel.getId(); 

         // Toast.makeText(context,position + " " + temp,Toast.LENGTH_LONG).show(); 

         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { 

          viewHolder.likebtn.setImageResource(R.drawable.ic_thumb_up_red_24dp); 
          //viewHolder.likebtn.setImageDrawable(context.getResources().getDrawable(R.drawable.ic_thumb_up_red_24dp, getContext().getTheme())); 
          viewHolder.check = 1; 
         } else { 
          viewHolder.likebtn.setImageDrawable(context.getResources().getDrawable(R.drawable.ic_thumb_up_red_24dp)); 
          viewHolder.check = 1; 
         } 
         customListner.onlikeImageClickListner(position,name); 
        } 
        else { 
         Toast.makeText(context,"You cant use this action",Toast.LENGTH_LONG).show(); 
        } 


       } 
      } 
     }); 
     viewHolder.dislikebtn.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (customListner != null) { 
        if(viewHolder.check == 0) { 

         int dislikecount = Integer.parseInt(dataModel.getDislike_count()); 
         dislikecount++; 
         viewHolder.dislikecount.setText(""+dislikecount); 

         String name = dislikecount + "#" + dataModel.getId(); 



         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { 
          viewHolder.dislikebtn.setImageDrawable(context.getResources().getDrawable(R.drawable.ic_thumb_down_red_24dp, getContext().getTheme())); 
          viewHolder.check = 1; 
         } else { 
          viewHolder.dislikebtn.setImageDrawable(context.getResources().getDrawable(R.drawable.ic_thumb_down_red_24dp)); 
          viewHolder.check = 1; 
         } 
         customListner.ondislikeImageClickListner(position,name); 
        } 
        else { 
         Toast.makeText(context,"You cant use this action",Toast.LENGTH_LONG).show(); 
        } 

       } 
      } 
     }); 


     Glide 
       .with(context) 
       .load(ss1link) 
       .into(viewHolder.ss1); 
     Glide 
       .with(context) 
       .load(ss2link) 
       .into(viewHolder.ss2); 
     Glide 
       .with(context) 
       .load(ss3link) 
       .into(viewHolder.ss3); 



     return convertView; 
    } 

    public class ViewHolder { 
     TextView themename,madeby,downcount,likecount,dislikecount; 
     Button btndownload; 
     ImageView ss1,ss2,ss3,likebtn,dislikebtn; 
     int check = 0, tempid = 0; 

    } 
} 

Answer 1

這是因爲在你的列表視圖對象重用。

您可以管理單獨的ArrayList或HashMap來保持喜歡。

並在此基礎上，你應該在你的getView這樣的更新，

if([already selected]) { 
    viewHolder.likebtn.setBackground([your selected drawable]); 
} else { 
    viewHolder.likebtn.setBackground([your non selected drawable]); 
}