Android,如何在单击项目时更新listview中的Particular imageview
我在arrayadapter类中有一个ViewHolder,我想在listview中的特定项目上绑定单击操作,并需要在favoriteicon单击时更新项目的内容 我在getView方法中有绑定单击操作:Android,如何在单击项目时更新listview中的Particular imageview,android,android-layout,listview,android-arrayadapter,android-viewholder,Android,Android Layout,Listview,Android Arrayadapter,Android Viewholder,我在arrayadapter类中有一个ViewHolder,我想在listview中的特定项目上绑定单击操作,并需要在favoriteicon单击时更新项目的内容 我在getView方法中有绑定单击操作: class ViewHolder { public ImageView favoriteicon; public TextView title; public TextView time; public TextVi
class ViewHolder
{
public ImageView favoriteicon;
public TextView title;
public TextView time;
public TextView type;
public TextView hidden_value_id;
public TextView hidden_image_name;
public boolean imageset=false;
public ImageView imgView;
public ViewHolder(View base)
{
this.favoriteicon=(ImageView) base.findViewById(R.id.favoriteicon);
this.title = (TextView) base.findViewById(R.id.title);
this.time = (TextView) base.findViewById(R.id.time);
this.type = (TextView) base.findViewById(R.id.type);
this.imgView = (ImageView) base.findViewById(R.id.icon);
this.hidden_value_id = (TextView) base.findViewById(R.id.hidden_value_id);
this.hidden_image_name = (TextView) base.findViewById(R.id.hidden_image_name);
}
}
@Override
public View getView(final int position,View view, final ViewGroup parent) {
final ViewHolder holder;
View rowView=view;
if(rowView==null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(context.LAYOUT_INFLATER_SERVICE);
rowView = inflater.inflate(R.layout.new_listview_items, parent, false);
holder = new ViewHolder(rowView);
rowView.setTag(holder);
}
else {
holder=(ViewHolder)rowView.getTag();
}
holder.title.setText(title.get(position));
holder.time.setText(time.get(position));
holder.type.setText(type.get(position));
holder.hidden_value_id.setText(id.get(position));
holder.hidden_image_name.setText(hidden_image_name.get(position));
if(holder.imageset==true)
{
holder.favoriteicon.setImageResource(R.drawable.h);
}
holder.favoriteicon.setOnClickListener(new
View.OnClickListener() {
public void onClick(View b) {
holder.favoriteicon.setImageResource(R.drawable.h);
holder.imageset=true;
notifyDataSetChanged();
}
});
return rowView;
}
如果我有项目的位置,如何在项目单击时更新listview中的特定项目。所以现在我想您有一个if-else语句,检查当前位置的项目是否受欢迎?现在发生的事情是,当单击图标图像时,您正在设置图标图像,但是您没有更改对象值。因此,当您上下滚动列表项并循环使用时,它将重置该值 你需要像这样的东西
holder.favoriteicon.setOnClickListener(new View.OnClickListener() {
public void onClick(View b) {
object.setFavourited(true);
holder.favoriteicon.setImageResource(R.drawable.h);
}
});
现在,这只是根据您发布的代码进行的猜测。如果你用剩下的适配器代码更新了这个问题,我可以更新我的答案 您是否调用notifyDataSetChanged?是。。但没有成功