Hi all, trying to set up my first ‘RecyclerView’ a...

# getting-started

[Will Nixon]

Hi all, trying to set up my first ‘RecyclerView’ and a little confused as to why the View in class ViewHolder is unrecognized… noob to Kotlin and Android development, so trying to wrap my head around it

import android.view.LayoutInflater
import android.view.ViewGroup
import androidx.recyclerview.widget.RecyclerView

class EntryAdapter(private val context: SpeechPageActivity, private val entryList: Array<String>) : RecyclerView.Adapter<EntryAdapter.ViewHolder>() {
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): EntryAdapter.ViewHolder {
        return ViewHolder(LayoutInflater.from(context).inflate(R.layout.entry_cell, parent, false))
    }

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

    override fun onBindViewHolder(holder: EntryAdapter.ViewHolder, position: Int) {
        holder.entryText?.text = entryList[position]
        holder.itemView.setOnClickListener {
            println(entryList[position])
        }
    }

    class ViewHolder(view: View) : RecyclerView.ViewHolder(view) {
        val entryText = view.entryText
        val entryImage = view.entryImage
    }

}

[Alejandro Rios]

is not necessary to pass context as parameter in the Adapter, you can get it from the onCreateViewHolder as parent.context

[Alejandro Rios]

and here's a basic example of an recyclerView implementation
https://androidwave.com/recyclerview-kotlin-tutorial/

[Ricardo901130]

You can’t assign directly this

val entryText = view.entryText
        val entryImage = view.entryImage

create a function for that

[Ricardo901130]

or init

[Ricardo901130]

init {
…..
}

[Ricardo901130]

class ViewHolder(view: View) : RecyclerView.ViewHolder(view) {
    var entryText
    var entryImage
    
    init {
        entryText = view.entryText
        entryImage = view.entryImage
     }
}

[pt]

The way he’s initializing those properties is fine. I’m guessing it’s just that View isn’t imported

[pt]

#android

[Will Nixon]

@pt you’re right - looks like i needed to import the view from my class. But everyone was super helpful - nearly there, now just need to figure out how to dynamically assign @drawables based on entryText