Android,如何在项目点击中更新listview中的pariticular imageview

时间:2016-03-24 10:33:21

标签: 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点击操作,并且需要在favoriteicon点击上更新项目的内容。

我在getView方法中绑定了click动作:

 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,如何更新项目点击列表视图中的特定项目。

1 个答案:

答案 0 :(得分:0)

所以目前我想你有一个if else语句,检查当前位置的项目是否有利于你?现在发生的是您在单击图标时设置图标,但是您没有更改对象值。因此,当您向上和向下滚动并且列表项被回收时,它将重置该值。

你需要有这样的东西

holder.favoriteicon.setOnClickListener(new View.OnClickListener() {
        public void onClick(View b) {
           object.setFavourited(true); 
           holder.favoriteicon.setImageResource(R.drawable.h); 
        } 
    }); 

现在这只是基于您目前发布的代码的猜测。如果您使用其余的适配器代码更新问题,我可以更新我的答案。