如何在RecyclerView中选择和取消选择项目?如何仅在回收者视图中突出显示选定的项目? [英] how to select and de-select an item in RecyclerView? How to Highlight selected item only in recycler view?

问题描述

@Override
    public void onBindViewHolder(final mainscreenspecializationadap.MyViewHolder holder, final int positionz) {
        this.position = holder.getAdapterPosition();
        final specializationpojo album = albumList.get(holder.getAdapterPosition());
        holder.txtspecs.setText(album.getSplztnname());
        holder.imgspecs.setImageResource(album.getIcon());

    holder.linelayout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            row_index=positionz;
            album.setOpened(!album.isOpened());
            notifyDataSetChanged();

        }
    });
    if(positionz==row_index){
        holder.imageView.setBackground(mContext.getResources().getDrawable(R.drawable.white_circle_background));
        holder.txtspecs.setSelected(true);
        if (type==1)
        {
            onClick.onSelected(row_index,album.isOpened(),album.isClosed());
        }
        else if(type==2)
        {   onClick.onSpecialisationSelected(album.getSplzcode(),album.getCount());
        }
    }
    else
    {
        holder.txtspecs.setSelected(false);
        holder.imageView.setBackground(mContext.getResources().getDrawable(R.drawable.green_background));
    }

}

1. 我有一个回收站视图，我只需要选择一个项目，因此在此基础上，我必须显示一个子列表项目.

1. I have a recycler view where I need to select only one item, so on that basis, I have to show a sub list items.

现在的问题是，当我取消选择该项目时，下面的子列表项应该被隐藏.

Now the problem is when I unselect that item the below sub list items should be hidden.

请给我建议一个答案，我将非常感谢您的回答.

Please suggest me an answer I will be thankful for the answer.

推荐答案

这是您要求的解决方案

    public class AdapterClass extends RecyclerView.Adapter<AdapterClass.ViewHolder> {
        private int selected_position = -1;

        @Override
        public void onBindViewHolder(AdapterClass.ViewHolder holder, final int position) {
            if (selected_position == position) {
                // do your stuff here like
                //Change selected item background color and Show sub item views

            } else {
                  // do your stuff here like
                  //Change  unselected item background color and Hide sub item views
            }
  // rest of the code here

    holder.linelayout.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View view) {
              if(selected_position==position){
                        selected_position=-1;
                        notifyDataSetChanged();
                        return;
                    }
                    selected_position = position;
                    notifyDataSetChanged();

            }
        });

    //rest of the code here

     }


}

这篇关于如何在RecyclerView中选择和取消选择项目?如何仅在回收者视图中突出显示选定的项目?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！