How to swap the selected recycler view item with the first item with change background color

Question

here I change the background of the selected item position and set that item to the first position init

    override fun onBindViewHolder(holder: FeelingsViewHolder, position: Int) {
        val item = dataset[position]
        holder.title.text = context.resources.getString(item.stringResourceId)
        holder.emoji.setImageResource(item.imageResourceId)

        holder.emoji.setOnClickListener {
            selectedItemPos = position

            notifyItemMoved(position, 0)
        }

        if (selectedItemPos == position)         

holder.itemView.setBackgroundColor(Color.parseColor("#200f726b"))
        else
          holder.itemView.setBackgroundColor(Color.parseColor("#ffffff"))
    override fun getItemCount() = dataset.size
}

I tried different ways but I failed

Hamed Goharshad · Answer 1 · 2022-07-21T12:54:42.263

0

Update:

According to your updated question, you must write something like this:

if (position == 0)
holder.itemView.setBackgroundColor(Color.parseColor("#200f726b"))

Let me know if it didn't work

Original answer:

First, you'd better use notifyItemMoved(position,0) instead of notifyDataSetChanged() because it has less performance overhead. You can read about the reason here:

What's better? notifyDataSetChanged or notifyItemChanged in loop?

if "selectedItemPos" is out of onBind method, the item that has recently been in the first position should be colorful

edited Jul 21 '22 at 12:54

answered Jul 17 '22 at 09:31

Hamed Goharshad

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Thanks, Hamed Gord but it's not working. I'm sharing my adapter code... please check – Vishal Thakur Jul 18 '22 at 04:45
I updated my adapter code please have a look. – Vishal Thakur Jul 18 '22 at 04:58
I think this code makes the first item that has been moved to a new position colorful. Is your output anything else? then pls share your current output and your expectation – Hamed Goharshad Jul 18 '22 at 18:36
check again the question I updated with a pic... so, this is my recycler view and I set multiple emojis and text. I want when I click on the sad emoji... sad emoji to move to the first position and change the background... I try when I click any item moves to the first position and change that item's background... – Vishal Thakur Jul 20 '22 at 04:28
Someone please help... I wanna fix this today's only – Vishal Thakur Jul 21 '22 at 05:34
I've solved you question after update – Hamed Goharshad Jul 22 '22 at 16:40

How to swap the selected recycler view item with the first item with change background color

1 Answers1