通过在 Adapter 的 getView() 中单击 imageView 更改图像

Posted 2023-05-07

【中文标题】通过在 Adapter 的 getView() 中单击 imageView 更改图像

【英文标题】：Change Image by clicking imageView in getView() of Adapter

【发布时间】：2014-07-29 21:02:08

【问题描述】：

目标：我想要的是，当我在列表项中单击图像时，它会在

数据库 TextView（随着点赞数的增加） 更改图像本身以表示列表项被喜欢。

错误：但每当我点击图片时，它会在数据库中进行更改并增加相应 TextView 的数量。

But it change images of other list items as well than of just clicked item.

请帮助我使用以下代码：

public class PopularTabRowAdapter extends BaseAdapter 

List<APIDataModel> videoList;
private Activity activity;
private static LayoutInflater inflater = null;
ImageLoader imageloader;
PopularDataSource datasource;
int pos;
ViewHolder holder;
ListView mListView;

public PopularTabRowAdapter(Activity activity,
        List<APIDataModel> videoList, ListView list) 
    this.activity = activity;
    this.videoList = videoList;
    inflater = (LayoutInflater) this.activity
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    imageloader = new ImageLoader(activity);
    mListView = list;
    this.datasource = new PopularDataSource(activity);


@Override
public int getCount() 
    // TODO Auto-generated method stub
    return videoList.size();


@Override
public Object getItem(int arg0) 
    // TODO Auto-generated method stub
    return videoList.get(arg0);


@Override
public long getItemId(int arg0) 
    // TODO Auto-generated method stub
    return videoList.get(arg0).getID();


@Override
public View getView(int position, View convertView, ViewGroup parent) 
    // TODO Auto-generated method stub
    View row = convertView;
    holder = null;
    pos = position;
    if (row == null) 
        row = inflater.inflate(R.layout.popular_tab_custum_row, parent,
                false);
        holder = new ViewHolder();
        holder.descriptiontxt = (TextView) row
                .findViewById(R.id.decription_popCustomRow);
        holder.listtxt = (TextView) row
                .findViewById(R.id.list_popCustomRow);
        holder.imageView = (ImageView) row
                .findViewById(R.id.image_popCustomRow);
        holder.likeImage = (ImageView) row
                .findViewById(R.id.likimage_popCustRow);
        holder.likeImage.setOnClickListener(likeImageListner);

        holder.numbLike = (TextView) row
                .findViewById(R.id.noLik_popCustRow);
        row.setTag(holder);
     else 
        holder = (ViewHolder) row.getTag();
    

    holder.descriptiontxt.setText(videoList.get(position).getDecription());
    holder.listtxt.setText(videoList.get(position).getList());
    imageloader.DisplayImage(ApplicationMain
            .getYouTubeVideoImageURL(videoList.get(position).getURL()),
            holder.imageView);
    holder.numbLike.setText(String.valueOf(videoList.get(position)
            .getNumberOfLikes()));
    if (videoList.get(position).getLikeStatus() == 1) 
        holder.likeImage.setImageResource(R.drawable.like_done);
    
    return row;


OnClickListener likeImageListner = new OnClickListener() 

    @Override
    public void onClick(View v) 
        // TODO Auto-generated method stub
        ViewHolder vh = getViewHolder(v);
        int positionVh = mListView.getPositionForView((View) v.getParent());

        if (isNetworkAvailable()) 
            Toast.makeText(activity, positionVh + "", Toast.LENGTH_LONG)
                    .show();
            if (videoList.get(positionVh).getLikeStatus() == 0) 
                HitLike like = new HitLike(positionVh, vh.likeImage,
                        vh.numbLike);
                like.execute();
            
        
    
;

public ViewHolder getViewHolder(View v) 
    if (v.getTag() == null) 
        return getViewHolder((View) v.getParent());
    
    return (ViewHolder) v.getTag();


class HitLike extends AsyncTask<Void, Void, String> 
    ImageView image;
    int position;
    TextView text;

    public HitLike(int position, ImageView image, TextView text) 
        this.position = position;
        this.image = image;
        this.text = text;
    

    @Override
    protected void onPreExecute() 
        // TODO Auto-generated method stub
        super.onPreExecute();
        activity.setProgressBarIndeterminateVisibility(true);
    

    @Override
    protected String doInBackground(Void... params) 
        // TODO Auto-generated method stub
        ServiceHandler sh = new ServiceHandler();
        String responce = sh.makeServiceCall(
                ApplicationMain.Instance.getPOPLikeAPI(),
                ServiceHandler.POST);
        Log.i("PopularRowAdapterResponce", responce);
        return responce;
    

    @Override
    protected void onPostExecute(String result) 
        // TODO Auto-generated method stub
        super.onPostExecute(result);
        activity.setProgressBarIndeterminateVisibility(false);
        datasource.open();
        if (datasource.addLike(videoList.get(position).getID(), videoList
                .get(position).getNumberOfLikes())) 
            APIDataModel model = new APIDataModel(videoList.get(position)
                    .getList(), videoList.get(position).getDecription(),
                    videoList.get(position).getURL());
            model.setNumberOfLikes(videoList.get(position)
                    .getNumberOfLikes() + 1);
            model.setLikeStatus(1);
            videoList.set(position, model);
            notifyDataSetChanged();
            image.setImageResource(R.drawable.like_done);
        
        datasource.close();
    


private boolean isNetworkAvailable() 
    ConnectivityManager connectivityManager = (ConnectivityManager) activity
            .getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetworkInfo = connectivityManager
            .getActiveNetworkInfo();
    return activeNetworkInfo != null && activeNetworkInfo.isConnected();


static class ViewHolder 
    TextView descriptiontxt;
    TextView listtxt;
    ImageView imageView;
    ImageView likeImage;
    TextView numbLike;

谢谢:)

【参考方案1】：

image.setImageResource(R.drawable.like_done);

并设置特定位置的图像更改，因为它在getview中并且使用了viewholder。所以你必须

1) 为所选图像创建临时数组，例如位置。

2) 如果 getview position==temp[i] then 则在 getview 中放入 for 循环并达到临时大小

   image.setImageResource(R.drawable.like_done);

否则

   image.setImageResource(R.drawable.default);

就是这样……