I can't manage to uset setImageResource on my holder (which is a part of a CardView). I've already tried to add a image asset but it didn't seem to work. I would like to know how can I change an image properly in this case.

This is the code of the entire page:

package com.example.revenuer.adapter

import android.R
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ImageView
import android.widget.TextView
import androidx.recyclerview.widget.RecyclerView
import com.example.revenuer.entity.Operation
import com.example.revenuer.listener.OperationListener


class HistoryAdapter(val list: List<Operation>): RecyclerView.Adapter<HistoryAdapter.OperationViewHolder>() {
    private var listener: OperationListener? = null

    fun setOnOperationListener(listener: OperationListener){
        this.listener = listener;
    }

    class OperationViewHolder(view: View, private val listener: OperationListener?):  RecyclerView.ViewHolder(view){
        val nameView: TextView
        val valueView: TextView
        val dateView: TextView
        val imageView: ImageView
        init {
            view.setOnClickListener{
                listener?.onListItemClick(view, adapterPosition)
            }
            nameView = view.findViewById(com.example.revenuer.R.id.item_cardview_name)
            valueView = view.findViewById(com.example.revenuer.R.id.item_cardview_value)
            dateView = view.findViewById(com.example.revenuer.R.id.item_cardview_date)
            imageView = view.findViewById(com.example.revenuer.R.id.operation_image)
        }
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): OperationViewHolder{
        val view = LayoutInflater.from(parent.context).inflate(com.example.revenuer.R.layout.operation_item, parent,false)
        return OperationViewHolder(view, listener)
    }

    override fun onBindViewHolder(holder: OperationViewHolder, position: Int) {
        val operation = list[position]
        holder.nameView.text = operation.name
        holder.valueView.text = operation.value
        holder.dateView.text = operation.date
        if (operation.type) {
            holder.imageView.setImageResource(R.drawable.custom_arrow_up)
        }

    }

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

CodePudding user response：

You have import android.R, so in the rest of your code you need to write com.example.revenuer.R to refer to your own package's R, just like you did elsewhere.

Solution:

Replace import android.R with import com.example.revenuer.R and you can replace all com.example.revenuer.R with R. Explicitly write android.R when you need to.