CODEWITHSUNDEEP
androidkotlinandroid-recyclerviewandroid-databinding
S S
S S

Reputation: 301

Recycler View Item Row color change alternatively

I have an issue, I want to have the recycler item row color alternatively. ie, If 1st row is in white color, 2nd row is in grey color and 3rd row is again white and 4th is again grey and so on. I tried one code, but it didn't work. Kindly help.

This is my code,

class ItemAdapter() : RecyclerView.Adapter<ItemAdapter.DateViewHolder>() {

    private var ItemList: MutableList<Items>? = ArrayList()
    private lateinit var ItemViewModel: ItemRowListBinding
    private lateinit var listener: OnItemClickListener

    init {
        this.ItemList = arrayListOf()
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): DateViewHolder {
        ItemViewModel = DataBindingUtil.inflate(
            LayoutInflater.from(parent.context), R.layout.item_row_list,
            parent, false
        )
        return DateViewHolder(ItemViewModel)
    }

    override fun onBindViewHolder(holder: DateViewHolder, position: Int) {

        if(position % 2 == 0) {                           
           holder.itemView.setBackgroundResource(R.color.White);
        } else {
           holder.itemView.setBackgroundResource(R.color.Grey);
        }

        holder.bindItemDetail(ItemList!![position])
    }

    override fun getItemCount(): Int {
        return ItemList!!.size
    }

    fun setItemList(scanList: MutableList<Items>) {
        this.ItemList = scanList
        notifyDataSetChanged()
    }


    inner class DateViewHolder(private var itemRowBinding: ItemRowListBinding) :
        RecyclerView.ViewHolder(itemRowBinding.root) {

        fun bindItemDetail(ItemResponse: Items) {

            if (itemRowBinding.ItemDetailViewModel == null) {
                itemRowBinding.ItemDetailViewModel =
                    ItemDetailViewModel(
                        ItemResponse,
                        itemView.context
                    )
            } else {
                itemRowBinding.ItemDetailViewModel!!.setDetail(ItemResponse)
                itemRowBinding.executePendingBindings()
            }

            itemRowBinding.root.Detail.setOnClickListener {
                notifyDataSetChanged()
            }

            itemRowBinding.root.itemLookup.setOnClickListener {
                Log.v(
                    "Clicked_ADAPTER",
                    "Clicked itemLookup adapter :: position -> $adapterPosition"
                )
            }

    }
}

Any help would be deeply appreciated.

Upvotes: 0

Views: 561

Answers (3)

Mittal Patel
Mittal Patel

Reputation: 6089

If you want to set the drawable you can use setBackgroundResource

Here you are trying to give color in setBackgroundResouce so it is not giving the result

You can set background color using setBackgroundColor

if(position % 2 == 0) {                           
           holder.itemView.setBackgroundColor(ContextCompat.getColor(context,R.color.White));
        } else {
           holder.itemView.setBackgroundColor(ContextCompat.getColor(context,R.color.Grey));
        }

Upvotes: 1

Parth
Parth

Reputation: 791

If you read setBackgroundDrawable's documentation, it expects a Drawable resource ID, or 0 to clear the background. A Color is not a Drawable. So you probably want to use this:

holder.itemView.setBackgroundColor(ContextCompat.getColor(context,R.color.white))

Upvotes: 2

Amitoz singh
Amitoz singh

Reputation: 164

Try this : It worked for me.

 if(position % 2 == 0){
        holder.itemView.setBackgroundColor(#A6A2A2);
    }else{
        holder.itemview.setBackgroundColor(#FFFFFF);
    }

Upvotes: 0

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