我有一个问题。我试图在列表视图中单击后更改图标。它可以正常工作,但不仅修改了被点击的图标,也修改了未显示的图标。例如,如果我单击列表视图中第一项的图标,那么第五个图标也会更改。对于所有后续项目都会出现此行为(每五个列表视图项目)。 这是我的getView方法:
public class AlphabeticalAdapter extends ArrayAdapter<String>
{
int layoutResourceId;
private final Context context;
private List<String> data;
private ProgressDialog mProgressDialog;
private ImageView downloadImageButton;
public AlphabeticalAdapter(Context context, int resource, List<String> data){
super(context, resource, data);
this.layoutResourceId = resource;
this.context = context;
this.data = data;
}
public View getView(int position, View convertView, ViewGroup parent) {
// View rowView = convertView;
final ViewHolder viewHolder;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.catalogslist_single_row, parent, false);
viewHolder = new ViewHolder();
viewHolder.catlogTitle=(TextView)convertView.findViewById(R.id.txtTitle);
viewHolder.icon=(ImageView)convertView.findViewById(R.id.imageView2);
viewHolder.downloadImageButton=(ImageView)convertView.findViewById(R.id.downloadImageButton);
//downloadImageButton = (ImageView)rowView.findViewById(R.id.downloadImageButton);
viewHolder.position = position;
viewHolder.downloadImageButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
System.out.println("DOWNLOAD PRESSED");
viewHolder.downloadImageButton = (ImageView)v.findViewById(R.id.downloadImageButton);
viewHolder.downloadImageButton.setImageResource(R.drawable.icon_ok);
viewHolder.downloadImageButton.setTag("downloaded");
//rowView.setTag("downloaded");
}
});
convertView.setTag(viewHolder);
}
else{
viewHolder= (ViewHolder)convertView.getTag();
}
viewHolder.catlogTitle.setText(data.get(position));
viewHolder.catlogTitle.setTypeface(regularDin);
viewHolder.icon.setImageResource(R.drawable.cata);
if(viewHolder.downloadImageButton.getTag() == "downloaded"){
downloadImageButton = (ImageView)convertView.findViewById(R.id.downloadImageButton);
downloadImageButton.setImageResource(R.drawable.icon_ok);
}
else{
downloadImageButton = (ImageView)convertView.findViewById(R.id.downloadImageButton);
downloadImageButton.setImageResource(R.drawable.icon_download);
}
viewHolder.position = position;
return convertView;
} //close getView
这是我的ViewHolder类:
static class ViewHolder{
ImageView downloadImageButton;
TextView catlogTitle;
ImageView icon;
int position;
}