[FIXED] How to highlight selected items in the Adapter in Android(Java)

Issue

couldn't highlight the selected item in the adapter recyclerview.

public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int position) {
    ViewHolder holder = (ViewHolder) viewHolder;
    ChannelMainBean bean = mList.get(position);
    holder.tvContent.setText(bean.getChannelName());
    if (holder.selectedItem == position){
        holder.tvContent.setBackground(ResUtils.getDrawable(R.drawable.choose_network_border_blue));
    }
    else{
        holder.tvContent.setBackground(ResUtils.getDrawable(R.drawable.choose_network_background_default));
    }
}

Solution

Try This

private int selectedItem = -1;

    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int position) {
        ViewHolder holder = (ViewHolder) viewHolder;
        ChannelMainBean bean = mList.get(position);
        holder.tvContent.setText(bean.getChannelName());
        
        holder.tvContent.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                selectedItem = position;
                notifyDataSetChanged();
            }
        });
        if (selectedItem == position){
            holder.tvContent.setBackground(ResUtils.getDrawable(R.drawable.choose_network_border_blue));
        }
        else{
            holder.tvContent.setBackground(ResUtils.getDrawable(R.drawable.choose_network_background_default));
        }
    }
    }

selectedItem is integer variable set global and than set click listener on TextView and inside click method set click position in to selectedItem and than notifyDataSetChanged() for update background for text view

Answered By - Mayur
Answer Checked By - Robin (JavaFixing Admin)