我有自定义列表视图和自定义适配器。每一行里面都有多个项目，当我点击像按钮一样，它改变了imageview的颜色，但它也影响了第4行，第7行和第10行。
在互联网上搜索后，我了解到我必须使用getTag和setTag，但我不知道如何使用它。 请帮助我理解getTag和setTag的概念并解决这个错误。
这是我的代码： -
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;
}
}
答案 0 :(得分：0)
这是因为列表视图中的对象重用。
您可以管理单独的ArrayList或HashMap来维护您的喜好。
基于此，你应该在你的getView中更新，
double calculateGlowSize(double diameter, double temperature, double distance) {
static const double DSUN = 1392684.0;
static const double TSUN = 5778.0;
// Georg's magic formula
double d = distance; // Distance
double D = diameter * DSUN;
double L = (D * D) * pow(temperature / TSUN, 4.0); // Luminosity
return 0.016 * pow(L, 0.25) / pow(d, 0.5); // Size
}